WO2021119193A2 - Variant nucleic acid libraries for adenosine receptors - Google Patents

Variant nucleic acid libraries for adenosine receptors Download PDF

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Publication number
WO2021119193A2
WO2021119193A2 PCT/US2020/064106 US2020064106W WO2021119193A2 WO 2021119193 A2 WO2021119193 A2 WO 2021119193A2 US 2020064106 W US2020064106 W US 2020064106W WO 2021119193 A2 WO2021119193 A2 WO 2021119193A2
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Prior art keywords
antibody
nucleic acid
adenosine
seq
instances
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French (fr)
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WO2021119193A3 (en
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Aaron Sato
Ray Tabibiazar
Pankaj Garg
Qiang Liu
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Twist Bioscience Corp
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Twist Bioscience Corp
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Priority to JP2022534468A priority Critical patent/JP2023504572A/ja
Priority to EP20897702.5A priority patent/EP4073296A4/en
Priority to CN202080096066.9A priority patent/CN115066518B/zh
Priority to IL293670A priority patent/IL293670A/en
Priority to KR1020227023123A priority patent/KR20220123410A/ko
Priority to CA3164146A priority patent/CA3164146A1/en
Priority to MX2022006995A priority patent/MX2022006995A/es
Priority to BR112022011235A priority patent/BR112022011235A2/pt
Priority to AU2020400030A priority patent/AU2020400030A1/en
Publication of WO2021119193A2 publication Critical patent/WO2021119193A2/en
Publication of WO2021119193A3 publication Critical patent/WO2021119193A3/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/286—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against neuromediator receptors, e.g. serotonin receptor, dopamine receptor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/005—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies constructed by phage libraries
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2869—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against hormone receptors
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
    • C12N15/1034—Isolating an individual clone by screening libraries
    • C12N15/1093—General methods of preparing gene libraries, not provided for in other subgroups
    • C—CHEMISTRY; METALLURGY
    • C40—COMBINATORIAL TECHNOLOGY
    • C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
    • C40B40/00—Libraries per se, e.g. arrays, mixtures
    • C40B40/04—Libraries containing only organic compounds
    • C40B40/06—Libraries containing nucleotides or polynucleotides, or derivatives thereof
    • C40B40/08—Libraries containing RNA or DNA which encodes proteins, e.g. gene libraries
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/21—Immunoglobulins specific features characterized by taxonomic origin from primates, e.g. man
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/569—Single domain, e.g. dAb, sdAb, VHH, VNAR or nanobody®
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2318/00—Antibody mimetics or scaffolds
    • C07K2318/10—Immunoglobulin or domain(s) thereof as scaffolds for inserted non-Ig peptide sequences, e.g. for vaccination purposes

Definitions

  • G protein-coupled receptors such as adenosine receptors are implicated in a wide variety of diseases. Raising antibodies to GPCRs has been difficult due to problems in obtaining suitable antigen because GPCRs are often expressed at low levels in cells and are very unstable when purified. Thus, there is a need for improved agents for therapeutic intervention which target GPCRs.
  • a nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof comprising: (a) providing predetermined sequences encoding for: i. a first plurality of polynucleotides, wherein each polynucleotide of the first plurality of polynucleotides encodes for a variant sequence encoding for CDR1 on a heavy chain; ii. a second plurality of polynucleotides, wherein each polynucleotide of the second plurality of polynucleotides encodes for a variant sequence encoding for CDR2 on a heavy chain; iii.
  • each polynucleotide of the third plurality of polynucleotides encodes for a variant sequence encoding for CDR3 on a heavy chain; and (b) mixing the first plurality of polynucleotides, the second plurality of polynucleotides, and the third plurality of polynucleotides to form the nucleic acid library encoding for the adenosine A2A receptor antibody or antibody fragment thereof.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the single domain antibody comprises one heavy chain variable domain.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least 100,000 variant sequences. Further provided herein are methods for generating a nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least 10 5 non-identical nucleic acids.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 100 nM.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 50 nM.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 10 nM.
  • nucleic acid library encoding for an adenosine A2A receptor antibody or antibody fragment thereof, wherein the nucleic acid library comprises at least five sequences encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 100 nM.
  • nucleic acid libraries comprising a plurality of nucleic acids, wherein each nucleic acid of the plurality of nucleic acids encodes for a sequence that when translated encodes for an antibody or antibody fragment thereof, wherein the antibody or antibody fragment thereof comprises a variable region of a heavy chain (VH) that comprises an adenosine A2A receptor binding domain, and wherein each nucleic acid of the plurality of nucleic acids comprises a sequence encoding for a sequence variant of the adenosine A2A receptor binding domain.
  • VH variable region of a heavy chain
  • nucleic acid libraries comprising a plurality of nucleic acids, wherein a length of the VH is about 100 to about 400 amino acids. Further provided herein are nucleic acid libraries comprising a plurality of nucleic acids, wherein a length of the VH is about 270 to about 300 base pairs. Further provided herein are nucleic acid libraries comprising a plurality of nucleic acids, wherein a length of the VH is about 300 to about 1200 base pairs. Further provided herein are nucleic acid libraries comprising a plurality of nucleic acids, wherein the library comprises at least 10 5 non-identical nucleic acids.
  • protein libraries comprising a plurality of proteins, wherein each of the proteins of the plurality of proteins comprise a variable region of a heavy chain (VH) that comprises a sequence variant of an adenosine A2A receptor binding domain.
  • VH variable region of a heavy chain
  • protein libraries comprising a plurality of proteins, wherein a length of the VH is about 90 to about 100 amino acids.
  • protein libraries comprising a plurality of proteins, wherein a length of the VH is about 100 to about 400 amino acids.
  • protein libraries comprising a plurality of proteins, wherein a length of the VH is about 270 to about 300 base pairs.
  • protein libraries comprising a plurality of proteins, wherein a length of the VH is about 300 to about 1200 base pairs. Further provided herein are protein libraries comprising a plurality of proteins, wherein the library comprises at least 10 5 non-identical nucleic acids. Further provided herein are protein libraries comprising a plurality of proteins, wherein the plurality of proteins are used to generate a peptidomimetic library. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises antibodies. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 500 variant sequences. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 5000 variant sequences. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 10000 variant sequences.
  • protein libraries comprising a plurality of proteins, wherein the plurality of proteins comprises sequences encoding for different adenosine A2A receptor binding domains, and wherein the length of each adenosine A2A receptor binding domain is about 100 to about 400 amino acids.
  • protein libraries comprising a plurality of proteins, wherein the protein library comprises peptides.
  • protein libraries comprising a plurality of proteins, wherein the protein library comprises antibodies.
  • protein libraries comprising a plurality of proteins, wherein the plurality of proteins is used to generate a peptidomimetic library. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 500 variant sequences. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 5000 variant sequences. Further provided herein are protein libraries comprising a plurality of proteins, wherein the protein library comprises at least 10000 variant sequences.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein each of the nucleic acids encodes for a sequence that when translated encodes for an adenosine A2A receptor binding immunoglobulin, wherein the adenosine A2A receptor binding immunoglobulin comprises a variant of an adenosine A2A receptor binding domain, wherein the adenosine A2A receptor binding domain is a ligand for the adenosine A2A receptor, and wherein the nucleic acid library comprises at least 10,000 variant immunoglobulin heavy chains and at least 10,000 variant immunoglobulin light chains.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein the nucleic acid library comprises at least 50,000 variant immunoglobulin heavy chains and at least 50,000 variant immunoglobulin light chains. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein the nucleic acid library comprises at least 100,000 variant immunoglobulin heavy chains and at least 100,000 variant immunoglobulin light chains. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein the nucleic acid library comprises at least 10 5 non-identical nucleic acids.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the immunoglobulin heavy chain when translated is about 90 to about 100 amino acids. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the immunoglobulin heavy chain when translated is about 100 to about 400 amino acids.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein each of the nucleic acids encodes for a sequence that when translated encodes for an adenosine A2A receptor single domain antibody, wherein each sequence of the plurality of sequences comprises a variant sequence encoding for at least one of a CDR1, CDR2, and CDR3 on a variable region of a heavy chain (VH); wherein the library comprises at least 30,000 variant sequences; and wherein the antibody or antibody fragments bind to its antigen with a KD of less than 100 nM.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the VH when translated is about 90 to about 100 amino acids. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the VH when translated is about 100 to about 400 amino acids. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the VH is about 270 to about 300 base pairs. Further provided herein are nucleic acid libraries comprising: a plurality of nucleic acids, wherein a length of the VH is about 300 to about 1200 base pairs.
  • vector libraries comprising the nucleic acid libraries as described herein.
  • cell libraries comprising the nucleic acid libraries as described herein.
  • cell libraries comprising the protein libraries as described herein.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein each of the nucleic acids encodes for a sequence that when translated encodes for an adenosine A2A receptor binding immunoglobulin, wherein the adenosine A2A receptor binding immunoglobulin comprises a variant of an adenosine A2A receptor binding domain, wherein the adenosine A2A receptor binding domain is a ligand for the adenosine A2A receptor, and wherein the nucleic acid library comprises at least 10,000 variant immunoglobulin heavy chains and at least 10,000 variant immunoglobulin light chains.
  • nucleic acid libraries comprising at least 50,000 variant immunoglobulin heavy chains and at least 50,000 variant immunoglobulin light chains. Further provided herein are nucleic acid libraries, wherein the nucleic acid library comprises at least 100,000 variant immunoglobulin heavy chains and at least 100,000 variant immunoglobulin light chains. Further provided herein are nucleic acid libraries, wherein the nucleic acid library comprises at least 10 5 non-identical nucleic acids. Further provided herein are nucleic acid libraries, wherein a length of the immunoglobulin heavy chain when translated is about 90 to about 100 amino acids. Further provided herein are nucleic acid libraries, wherein a length of the immunoglobulin heavy chain when translated is about 100 to about 400 amino acids.
  • nucleic acid libraries wherein the variant immunoglobulin heavy chain when translated comprises at least about 90% sequence identity to any one of SEQ ID NO: 540-628. Further provided herein are nucleic acid libraries, wherein the variant immunoglobulin light chain when translated comprises at least about 90% sequence identity to any one of SEQ ID NO: 629-717. Further provided herein are nucleic acid libraries, wherein the variant immunoglobulin heavy chain when translated comprises any one of SEQ ID NO: 540-628. Further provided herein are nucleic acid libraries, wherein the variant immunoglobulin light chain when translated comprises any one of SEQ ID NO: 629-717.
  • nucleic acid libraries comprising a plurality of nucleic acids, wherein each nucleic acid of the plurality of nucleic acids encodes for a sequence that when translated encodes for an antibody or antibody fragment thereof, wherein the antibody or antibody fragment thereof comprises a variable region of a heavy chain (VH) that comprises an adenosine A2A receptor binding domain, wherein each nucleic acid of the plurality of nucleic acids comprises a sequence encoding for a sequence variant of the adenosine A2A receptor binding domain, and wherein the antibody or antibody fragment binds to its antigen with a K D of less than 100 nM.
  • VH variable region of a heavy chain
  • nucleic acid libraries wherein a length of the VH is about 90 to about 100 amino acids. Further provided herein are nucleic acid libraries, wherein a length of the VH is about 100 to about 400 amino acids. Further provided herein are nucleic acid libraries, wherein a length of the VH is about 270 to about 300 base pairs. Further provided herein are nucleic acid libraries, wherein a length of the VH is about 300 to about 1200 base pairs. Further provided herein are nucleic acid libraries, wherein the library comprises at least 10 5 non-identical nucleic acids.
  • nucleic acid libraries comprising: a plurality of nucleic acids, wherein each of the nucleic acids encodes for a sequence that when translated encodes for an adenosine A2A receptor single domain antibody, wherein each sequence of the plurality of sequences comprises a variant sequence encoding for a CDR1, CDR2, or CDR3 on a variable region of a heavy chain (VH); wherein the library comprises at least 30,000 variant sequences; and wherein the adenosine A2A receptor single domain antibody binds to its antigen with a KD of less than 100 nM.
  • nucleic acid libraries wherein a length of the VH when translated is about 90 to about 100 amino acids.
  • nucleic acid libraries wherein a length of the VH when translated is about 100 to about 400 amino acids. Further provided herein are nucleic acid libraries, wherein a length of the VH is about 270 to about 300 base pairs. Further provided herein are nucleic acid libraries, wherein a length of the VH is about 300 to about 1200 base pairs. Further provided herein are nucleic acid libraries, wherein the variant library comprises a variant sequence encoding for a CDR1, CDR2, and CDR3. Further provided herein are nucleic acid libraries, wherein the VH when translated comprises at least 90% sequence identity to any one of SEQ ID NO: 540-628. Further provided herein are nucleic acid libraries, wherein the VH when translated comprises any one of SEQ ID NO: 540-628.
  • antibodies or antibody fragments that bind adenosine A2A receptor comprising an immunoglobulin heavy chain and an immunoglobulin light chain: wherein the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 540-628; and wherein the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 629-717.
  • antibodies or antibody fragments wherein the immunoglobulin heavy chain comprises an amino acid sequence at least about 95% identical to that set forth in any one of SEQ ID NOs: 540-628; and wherein the immunoglobulin light chain comprises an amino acid sequence at least about 95% identical to that set forth in any one of SEQ ID NOs: 629-717. Further provided herein are antibodies or antibody fragments, wherein the immunoglobulin heavy chain comprises an amino acid sequence as set forth in any one of SEQ ID NOs: 540-628; and wherein the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 629-717.
  • antibodies or antibody fragments wherein the antibody is a monoclonal antibody, a polyclonal antibody, a bi-specific antibody, a multispecific antibody, a grafted antibody, a human antibody, a humanized antibody, a synthetic antibody, a chimeric antibody, a camelized antibody, a single-chain Fvs (scFv), a single chain antibody, a Fab fragment, a F(ab')2 fragment, a Fd fragment, a Fv fragment, a single-domain antibody, an isolated complementarity determining region (CDR), a diabody, a fragment comprised of only a single monomeric variable domain, disulfide-linked Fvs (sdFv), an intrabody, an anti-idiotypic (anti-id) antibody, or ab antigen-binding fragments thereof.
  • scFv single chain antibody
  • Fab fragment a F(ab')2 fragment
  • Fd fragment a Fv fragment
  • CDR complementarity determining region
  • antibodies or antibody fragments wherein the antibody or antibody fragment thereof is chimeric or humanized. Further provided herein are antibodies or antibody fragments, wherein the antibody has an EC50 less than about 25 nanomolar in a cAMP assay. Further provided herein are antibodies or antibody fragments, wherein the antibody has an EC50 less than about 20 nanomolar in a cAMP assay. Further provided herein are antibodies or antibody fragments, wherein the antibody has an EC50 less than about 10 nanomolar in a cAMP assay.
  • antibodies or antibody fragments wherein the antibody or antibody fragment comprises a complementarity determining region (CDR) comprising an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 6-539.
  • CDR complementarity determining region
  • antibodies or antibody fragments wherein the antibody or antibody fragment comprises a variable heavy chain complementarity determining region (CDRH) comprising an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 6-272.
  • CDRH variable heavy chain complementarity determining region
  • antibodies or antibody fragments wherein the antibody or antibody fragment comprises a variable light chain complementarity determining region (CDRH) comprising an amino acid sequence at least about 90% identical to that set forth in any one of SEQ ID NOs: 273-539.
  • CDRH variable light chain complementarity determining region
  • antibodies or antibody fragments wherein the antibody or antibody fragment comprises a sequence of any one of SEQ ID NOs: 6-539 and wherein the antibody is a monoclonal antibody, a polyclonal antibody, a bi-specific antibody, a multispecific antibody, a grafted antibody, a human antibody, a humanized antibody, a synthetic antibody, a chimeric antibody, a camelized antibody, a single-chain Fvs (scFv), a single chain antibody, a Fab fragment, a F(ab')2 fragment, a Fd fragment, a Fv fragment, a single-domain antibody, an isolated complementarity determining region (CDR), a diabody, a fragment comprised of only a single monomeric variable domain, disulfide-linked Fvs (sdFv), an intrabody, an anti -idiotypic (anti-id) antibody, or ab antigen-binding fragments thereof.
  • the antibody is a monoclonal antibody, a polyclonal
  • kits for treating a neurological disease or disorder comprising administering the antibody or antibody fragment described herein.
  • adenosine A2A receptor antibody or antibody fragment thereof comprising: (a) providing predetermined sequences encoding for: i. a first plurality of polynucleotides, wherein each polynucleotide of the first plurality of polynucleotides encodes for at least 1000 variant sequence encoding for CDR1 on a heavy chain; ii. a second plurality of polynucleotides, wherein each polynucleotide of the second plurality of polynucleotides encodes for at least 1000 variant sequence encoding for CDR2 on a heavy chain; iii.
  • each polynucleotide of the third plurality of polynucleotides encodes for at least 1000 variant sequence encoding for CDR3 on a heavy chain; and (b) mixing the first plurality of polynucleotides, the second plurality of polynucleotides, and the third plurality of polynucleotides to form the nucleic acid library of variant nucleic acids encoding for the adenosine A2A receptor antibody or antibody fragment thereof, and wherein at least about 70% of the variant nucleic acids encode for an antibody or antibody fragment that binds to adenosine A2A receptor with a KD of less than 100 nM.
  • the adenosine A2A receptor antibody or antibody fragment thereof is a single domain antibody.
  • the single domain antibody comprises one heavy chain variable domain.
  • the single domain antibody is a VHH antibody.
  • the nucleic acid library comprises at least 50,000 variant sequences.
  • the nucleic acid library comprises at least 100,000 variant sequences.
  • the nucleic acid library comprises at least 10 5 non-identical nucleic acids.
  • nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a KD of less than 75 nM. Further provided herein are methods, wherein the nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 50 nM.
  • nucleic acid library comprises at least one sequence encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 10 nM. Further provided herein are methods, wherein the nucleic acid library comprises at least 500 variant sequences. Further provided herein are methods, wherein the nucleic acid library comprises at least five sequences encoding for the adenosine A2A receptor antibody or antibody fragment that binds to adenosine A2A receptor with a K D of less than 75 nM.
  • protein libraries encoded by the nucleic acid library described herein wherein the protein library comprises peptides. Further provided herein are protein libraries, wherein the protein library comprises immunoglobulins. Further provided herein are protein libraries, wherein the protein library comprises antibodies. Further provided herein are protein libraries, wherein the protein library is a peptidomimetic library.
  • vector libraries comprising the nucleic acid library described herein.
  • cell libraries comprising the nucleic acid library described herein.
  • cell libraries comprising the protein library described herein.
  • Figure 1 A depicts a first schematic of an immunoglobulin scaffold.
  • Figure IB depicts a second schematic of an immunoglobulin scaffold.
  • Figure 2 depicts a schematic of a motif for placement in a scaffold.
  • Figure 3 presents a diagram of steps demonstrating an exemplary process workflow for gene synthesis as disclosed herein.
  • Figure 4 illustrates an example of a computer system.
  • Figure 5 is a block diagram illustrating an architecture of a computer system.
  • Figure 6 is a diagram demonstrating a network configured to incorporate a plurality of computer systems, a plurality of cell phones and personal data assistants, and Network Attached Storage (NAS).
  • NAS Network Attached Storage
  • Figure 7 is a block diagram of a multiprocessor computer system using a shared virtual address memory space.
  • Figure 8A depicts a schematic of an immunoglobulin scaffold comprising a VH domain attached to a VL domain using a linker.
  • Figure 8B depicts a schematic of a full-domain architecture of an immunoglobulin scaffold comprising a VH domain attached to a VL domain using a linker, a leader sequence, and pill sequence.
  • Figure 8C depicts a schematic of four framework elements (FW1, FW2, FW3, FW4) and the variable 3 CDR (LI, L2, L3) elements for a VL or VH domain.
  • Figure 9 A depicts a structure of Glucagon-like peptide 1 (GLP-1, cyan) in complex with GLP-1 receptor (GLP-1R, grey), PDB entry 5VAI.
  • Figure 9B depicts a crystal structure of CXCR4 chemokine receptor (grey) in complex with a cyclic peptide antagonist CVX15 (blue), PDB entry 3OR0.
  • Figure 9C depicts a crystal structure of human smoothened with the transmembrane domain in grey and extracellular domain (ECD) in orange, PDB entry 5L7D.
  • ECD transmembrane domain in grey and extracellular domain
  • the ECD contacts the TMD through extracellular loop 3 (ECL3).
  • Figure 9D depicts a structure of GLP-1R (grey) in complex with a Fab (magenta), PDB entry 6LN2.
  • Figure 9E depicts a crystal structure of CXCR4 (grey) in complex with a viral chemokine antagonist Viral macrophage inflammatory protein 2 (vMIP-II, green), PDB entry 4RWS.
  • Figure 10 depicts a schema of the GPCR focused library design. Two germline heavy chain VHl-69 and VH3-30; 4 germline light chain IGKV1-39 and IGKV3-15, and IGLV1-51 and IGLV2-14.
  • Figure 11 depicts a graph of HCDR3 length distribution in the GPCR-focused library compared to the HCDR3 length distribution in B-cell populations from three healthy adult donors. In total, 2,444,718 unique VH sequences from the GPCR library and 2,481,511 unique VH sequences from human B-cell repertoire were analyzed to generate the length distribution plot.
  • Figure 12 depicts the clone, ELISA value, Library, ProA value, and KD value for VHH- Fc.
  • Figure 13 depicts a schema of design of phage-displayed hyperimmune libraries generated herein.
  • Figures 14A-14B depict graphs of a dose curve (FIG. 14A) and FACS analysis (FIG. 14B) of A2AR-90-007.
  • Figure 15A depicts a schema of heavy chain IGHV3-23 design.
  • Figure 15B depicts a schema of heavy chain IGHV1-69 design.
  • Figure 15C depicts a schema of light chains IGKV 2-28 and IGLV 1-51 design.
  • Figure 15D depicts a schema of the theoretical diversity and final diversity of a GPCR library.
  • Figures 16A-160 depict flow cytometry data using variant A2A receptor immunoglobulins (FIGS. 16A-16N) and control (FIG. 160).
  • Figures 17A-17H depict graphs of binding curves. Binding curves are plotted with IgG concentration vs. MFI (mean fluorescence intensity).
  • Figures 18A-180 depict graphs of binding curves using variants from a mouse immune library (FIGS. 18A-18N) and using a control (FIG. 180).
  • Figures 19A-19G depict graph of cell binding with adenosine A2aR monoclonal (MAB9497) and selected variants. Binding curves are plotted with IgG concentration vs. MFI (mean fluorescence intensity).
  • Figures 20A-20G depict graphs of cell binding in a titration assay from 100 nM.
  • Figure 21 depicts data from an agonist dose-response assay measured using a cAMP assay.
  • Figure 22 depicts data from an antagonist dose-response assay measured using a cAMP assay.
  • Figure 23 depicts results from a cAMP antagonist titration assay.
  • Figure 24 depicts data from variant A2A-1 and A2A-9 from a cAMP assay.
  • Figure 25 depicts data for variant A2A9 using a cAMP assay.
  • Figure 26 depicts data for variant A2A9 using a cAMP antagonist titration assay.
  • Figures 27A-27C depict data for variant A2A receptor immunoglobulins in an antagonistic cAMP assay.
  • Figures 28A-28C depict data for variant A2A receptor immunoglobulins in an allosteric cAMP assay.
  • Figures 29A-29C depict data for variant A2A receptor immunoglobulins in an antagonistic cAMP assay.
  • Figures 30A-30C depict data for variant A2A receptor immunoglobulins in an antagonistic cAMP assay.
  • a range such as from 1 to 6 should be considered to have specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual values within that range, for example, 1.1, 2, 2.3, 5, and 5.9. This applies regardless of the breadth of the range.
  • the upper and lower limits of these intervening ranges may independently be included in the smaller ranges, and are also encompassed within the disclosure, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the disclosure, unless the context clearly dictates otherwise.
  • nucleic acid encompasses double- or triple-stranded nucleic acids, as well as single-stranded molecules.
  • nucleic acid strands need not be coextensive (i.e., a double-stranded nucleic acid need not be double-stranded along the entire length of both strands).
  • Nucleic acid sequences, when provided, are listed in the 5’ to 3’ direction, unless stated otherwise. Methods described herein provide for the generation of isolated nucleic acids. Methods described herein additionally provide for the generation of isolated and purified nucleic acids.
  • a “nucleic acid” as referred to herein can comprise at least 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, or more bases in length.
  • polypeptide-segments encoding nucleotide sequences, including sequences encoding non-ribosomal peptides (NRPs), sequences encoding non-ribosomal peptide- synthetase (NRPS) modules and synthetic variants, polypeptide segments of other modular proteins, such as antibodies, polypeptide segments from other protein families, including non coding DNA or RNA, such as regulatory sequences e.g. promoters, transcription factors, enhancers, siRNA, shRNA, RNAi, miRNA, small nucleolar RNA derived from microRNA, or any functional or structural DNA or RNA unit of interest.
  • NRPs non-ribosomal peptides
  • NRPS non-ribosomal peptide- synthetase
  • synthetic variants polypeptide segments of other modular proteins, such as antibodies, polypeptide segments from other protein families, including non coding DNA or RNA, such as regulatory sequences e.g. promoters, transcription factors, enhancers,
  • polynucleotides coding or non-coding regions of a gene or gene fragment, intergenic DNA, loci (locus) defined from linkage analysis, exons, introns, messenger RNA (mRNA), transfer RNA, ribosomal RNA, short interfering RNA (siRNA), short-hairpin RNA (shRNA), micro-RNA (miRNA), small nucleolar RNA, ribozymes, complementary DNA (cDNA), which is a DNA representation of mRNA, usually obtained by reverse transcription of messenger RNA (mRNA) or by amplification; DNA molecules produced synthetically or by amplification, genomic DNA, recombinant polynucleotides, branched polynucleotides, plasmids, vectors, isolated DNA of any sequence, isolated RNA of any sequence, nucleic acid probes, and primers.
  • cDNA encoding for a gene or gene fragment referred herein may comprise at least one region encoding for exon sequences
  • GPCR G protein-coupled receptor
  • ADORA2 adenosine A2A receptor
  • Adenosine A2A receptor Adenosine A2A receptor
  • Scaffolds as described herein can stably support an adenosine A2A receptor binding domain.
  • the adenosine A2A receptor binding domain may be designed based on surface interactions of an adenosine A2A receptor ligand and adenosine A2A receptor.
  • Libraries as described herein may be further variegated to provide for variant libraries comprising nucleic acids each encoding for a predetermined variant of at least one predetermined reference nucleic acid sequence.
  • protein libraries that may be generated when the nucleic acid libraries are translated.
  • nucleic acid libraries as described herein are transferred into cells to generate a cell library.
  • downstream applications for the libraries synthesized using methods described herein include identification of variant nucleic acids or protein sequences with enhanced biologically relevant functions, e.g., improved stability, affinity, binding, functional activity, and for the treatment or prevention of a disease state associated with adenosine A2A receptor signaling.
  • Methods, compositions, and systems described herein for the optimization of adenosine A2A receptor immunoglobulins or antibodies comprise a ratio-variant approach that mirror the natural diversity of antibody sequences.
  • libraries of optimized adenosine A2A receptor immunoglobulins or antibodies comprise variant adenosine A2A receptor immunoglobulin or antibody sequences.
  • the variant adenosine A2A receptor immunoglobulin or antibody sequences are designed comprising variant CDR regions.
  • the variant adenosine A2A receptor immunoglobulin or antibody sequences comprising variant CDR regions are generated by shuffling the natural CDR sequences in a llama, humanized, or chimeric framework.
  • such libraries are synthesized, cloned into expression vectors, and translation products (antibodies) evaluated for activity.
  • fragments of sequences are synthesized and subsequently assembled.
  • expression vectors are used to display and enrich desired antibodies, such as phage display.
  • the phage vector is a Fab phagemid vector. Selection pressures used during enrichment in some instances includes binding affinity, toxicity, immunological tolerance, stability, or other factor.
  • Such expression vectors allow antibodies with specific properties to be selected (“panning”), and subsequent propagation or amplification of such sequences enriches the library with these sequences.
  • Panning rounds can be repeated any number of times, such as 1, 2, 3, 4, 5, 6, 7, or more than 7 rounds.
  • each round of panning involves a number of washes.
  • each round of panning involves at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, or more than 16 washes.
  • Libraries as described herein are designed based on a database comprising a variety of antibody sequences.
  • the database comprises a plurality of variant antibody sequences against various targets.
  • the database comprises at least 100, 500,
  • An exemplary database is an iCAN database.
  • the database comprises naive and memory B-cell receptor sequences.
  • the naive and memory B-cell receptor sequences are human, mouse, or primate sequences.
  • the naive and memory B- cell receptor sequences are human sequences.
  • the database is analyzed for position specific variation.
  • antibodies described herein comprise position specific variations in CDR regions.
  • the CDR regions comprise multiple sites for variation.
  • libraries comprising nucleic acids encoding for a scaffold, wherein sequences for adenosine A2A receptor binding domains are placed in the scaffold.
  • Scaffold described herein allow for improved stability for a range of adenosine A2A receptor binding domain encoding sequences when inserted into the scaffold, as compared to an unmodified scaffold.
  • Exemplary scaffolds include, but are not limited to, a protein, a peptide, an immunoglobulin, derivatives thereof, or combinations thereof.
  • the scaffold is an immunoglobulin.
  • Scaffolds as described herein comprise improved functional activity, structural stability, expression, specificity, or a combination thereof.
  • scaffolds comprise long regions for supporting an adenosine A2A receptor binding domain.
  • libraries comprising nucleic acids encoding for a scaffold, wherein the scaffold is an immunoglobulin.
  • the immunoglobulin is an antibody.
  • the term antibody will be understood to include proteins having the characteristic two armed, Y-shape of a typical antibody molecule as well as one or more fragments of an antibody that retain the ability to specifically bind to an antigen.
  • Exemplary antibodies include, but are not limited to, a monoclonal antibody, a polyclonal antibody, a bi-specific antibody, a multispecific antibody, a grafted antibody, a human antibody, a humanized antibody, a synthetic antibody, a chimeric antibody, a camelized antibody, a single-chain Fvs (scFv) (including fragments in which the VL and VH are joined using recombinant methods by a synthetic or natural linker that enables them to be made as a single protein chain in which the VL and VH regions pair to form monovalent molecules, including single chain Fab and scFab), a single chain antibody, a Fab fragment (including monovalent fragments comprising the VL, VH, CL, and CHI domains), a F(ab')2 fragment (including bivalent fragments comprising two Fab fragments linked by a disulfide bridge at the hinge region), a Fd fragment (including fragments comprising the VH and CHI fragment), a Fv
  • the libraries disclosed herein comprise nucleic acids encoding for a scaffold, wherein the scaffold is a Fv antibody, including Fv antibodies comprised of the minimum antibody fragment which contains a complete antigen-recognition and antigen binding site.
  • the Fv antibody consists of a dimer of one heavy chain and one light chain variable domain in tight, non-covalent association, and the three hypervariable regions of each variable domain interact to define an antigen-binding site on the surface of the VH- VL dimer.
  • the six hypervariable regions confer antigen-binding specificity to the antibody.
  • a single variable domain (or half of an Fv comprising only three hypervariable regions specific for an antigen, including single domain antibodies isolated from camelid animals comprising one heavy chain variable domain or variable region of a heavy chain such as VHH antibodies or nanobodies) has the ability to recognize and bind antigen.
  • the libraries disclosed herein comprise nucleic acids encoding for a scaffold, wherein the scaffold is a single-chain Fv or scFv, including antibody fragments comprising a VH, a VL, or both a VH and VL domain, wherein both domains are present in a single polypeptide chain.
  • the Fv polypeptide further comprises a polypeptide linker between the VH and VL domains allowing the scFv to form the desired structure for antigen binding.
  • a scFv is linked to the Fc fragment or a VHH is linked to the Fc fragment (including minibodies).
  • the antibody comprises immunoglobulin molecules and immunologically active fragments of immunoglobulin molecules, e.g., molecules that contain an antigen binding site.
  • Immunoglobulin molecules are of any type (e.g., IgG, IgE, IgM, IgD, IgA and IgY), class (e.g., IgG 1, IgG 2, IgG 3, IgG 4, IgA 1 and IgA 2) or subclass.
  • type e.g., IgG, IgE, IgM, IgD, IgA and IgY
  • class e.g., IgG 1, IgG 2, IgG 3, IgG 4, IgA 1 and IgA 2 or subclass.
  • libraries comprise immunoglobulins that are adapted to the species of an intended therapeutic target.
  • these methods include “mammalization” and comprises methods for transferring donor antigen-binding information to a less immunogenic mammal antibody acceptor to generate useful therapeutic treatments.
  • the mammal is mouse, rat, equine, sheep, cow, primate (e.g., chimpanzee, baboon, gorilla, orangutan, monkey), dog, cat, pig, donkey, rabbit, and human.
  • primate e.g., chimpanzee, baboon, gorilla, orangutan, monkey
  • dog cat
  • pig donkey
  • rabbit and human.
  • provided herein are libraries and methods for felinization and caninization of antibodies.
  • “Humanized” forms of non-human antibodies can be chimeric antibodies that contain minimal sequence derived from the non-human antibody.
  • a humanized antibody is generally a human antibody (recipient antibody) in which residues from one or more CDRs are replaced by residues from one or more CDRs of a non-human antibody (donor antibody).
  • the donor antibody can be any suitable non-human antibody, such as a mouse, rat, rabbit, chicken, or non-human primate antibody having a desired specificity, affinity, or biological effect.
  • selected framework region residues of the recipient antibody are replaced by the corresponding framework region residues from the donor antibody.
  • Humanized antibodies may also comprise residues that are not found in either the recipient antibody or the donor antibody.
  • Caninization can comprise a method for transferring non-canine antigen-binding information from a donor antibody to a less immunogenic canine antibody acceptor to generate treatments useful as therapeutics in dogs.
  • caninized forms of non-canine antibodies provided herein are chimeric antibodies that contain minimal sequence derived from non-canine antibodies.
  • caninized antibodies are canine antibody sequences (“acceptor” or “recipient” antibody) in which hypervariable region residues of the recipient are replaced by hypervariable region residues from a non-canine species (“donor” antibody) such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an engineered sequence having the desired properties.
  • donor antibody such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an engineered sequence having the desired properties.
  • donor antibody such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an
  • the caninized antibody may also comprise at least a portion of an immunoglobulin constant region (Fc) of a canine antibody.
  • Fc immunoglobulin constant region
  • felinization can comprise a method for transferring non-feline antigen-binding information from a donor antibody to a less immunogenic feline antibody acceptor to generate treatments useful as therapeutics in cats.
  • felinized forms of non-feline antibodies provided herein are chimeric antibodies that contain minimal sequence derived from non-feline antibodies.
  • felinized antibodies are feline antibody sequences (“acceptor” or “recipient” antibody) in which hypervariable region residues of the recipient are replaced by hypervariable region residues from a non-feline species (“donor” antibody) such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an engineered sequence having the desired properties.
  • donor antibody such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an engineered sequence having the desired properties.
  • donor antibody such as mouse, rat, rabbit, cat, dogs, goat, chicken, bovine, horse, llama, camel, dromedaries, sharks, non human primates, human, humanized, recombinant sequence, or an
  • the felinized antibody may also comprise at least a portion of an immunoglobulin constant region (Fc) of a felinize antibody.
  • Fc immunoglobulin constant region
  • libraries comprising nucleic acids encoding for a scaffold, wherein the scaffold is a non-immunoglobulin.
  • the scaffold is a non-immunoglobulin binding domain.
  • the scaffold is an antibody mimetic.
  • Exemplary antibody mimetics include, but are not limited to, anticalins, affilins, affibody molecules, affimers, affitins, alphabodies, avimers, atrimers, DARPins, fynomers, Kunitz domain-based proteins, monobodies, anticalins, knottins, armadillo repeat protein-based proteins, and bicyclic peptides.
  • Libraries described herein comprising nucleic acids encoding for a scaffold, wherein the scaffold is an immunoglobulin comprise variations in at least one region of the immunoglobulin.
  • Exemplary regions of the antibody for variation include, but are not limited to, a complementarity determining region (CDR), a variable domain, or a constant domain.
  • the CDR is CDR1, CDR2, or CDR3.
  • the CDR is a heavy domain including, but not limited to, CDRH1, CDRH2, and CDRH3.
  • the CDR is a light domain including, but not limited to, CDRLl, CDRL2, and CDRL3.
  • the variable domain is variable domain, light chain (VL) or variable domain, heavy chain (VH).
  • the VL domain comprises kappa or lambda chains.
  • the constant domain is constant domain, light chain (CL) or constant domain, heavy chain (CH).
  • Methods described herein provide for synthesis of libraries comprising nucleic acids encoding for a scaffold, wherein each nucleic acid encodes for a predetermined variant of at least one predetermined reference nucleic acid sequence.
  • the predetermined reference sequence is a nucleic acid sequence encoding for a protein
  • the variant library comprises sequences encoding for variation of at least a single codon such that a plurality of different variants of a single residue in the subsequent protein encoded by the synthesized nucleic acid are generated by standard translation processes.
  • the scaffold library comprises varied nucleic acids collectively encoding variations at multiple positions.
  • the variant library comprises sequences encoding for variation of at least a single codon of a CDRH1, CDRH2, CDRH3, CDRLl, CDRL2, CDRL3, VL, or VH domain. In some instances, the variant library comprises sequences encoding for variation of multiple codons of a CDRH1, CDRH2, CDRH3, CDRLl, CDRL2, CDRL3, VL, or VH domain. In some instances, the variant library comprises sequences encoding for variation of multiple codons of framework element 1 (FW1), framework element 2 (FW2), framework element 3 (FW3), or framework element 4 (FW4).
  • An exemplary number of codons for variation include, but are not limited to, at least or about 1, 5, 10, 15, 20, 25,
  • the at least one region of the immunoglobulin for variation is from heavy chain V-gene family, heavy chain D-gene family, heavy chain J-gene family, light chain V- gene family, or light chain J-gene family.
  • the light chain V-gene family comprises immunoglobulin kappa (IGK) gene or immunoglobulin lambda (IGL).
  • Exemplary genes include, but are not limited to, IGHV1-18, IGHV1-69, IGHV1-8, IGHV3-21, IGHV3-23, IGHV3- 30/33m, IGHV3-28, IGHV1-69, IGHV3-74, IGHV4-39, IGHV4-59/61, IGKV1-39, IGKV1-9, IGKV2-28, IGKV3-11, IGKV3-15, IGKV3-20, IGKV4-1, IGLV1-51, IGLV2-14, IGLV1-40, and IGLV3-1.
  • the gene is IGHV1-69, IGHV3-30, IGHV3-23, IGHV3, IGHV1-46, IGHV3-7, IGHV1, or IGHV1-8. In some instances, the gene is IGHV1-69 and IGHV3-30. In some instances, the gene is IGHJ3, IGHJ6, IGHJ, IGHJ4, IGHJ5, IGHJ2, or IGH1. In some instances, the gene is IGHJ3, IGHJ6, IGHJ, or IGHJ4.
  • the fragments comprise the CDRH1, CDRH2, CDRH3, CDRL1, CDRL2, CDRL3, VL, or VH domain.
  • the fragments comprise framework element 1 (FW1), framework element 2 (FW2), framework element 3 (FW3), or framework element 4 (FW4).
  • the scaffold libraries are synthesized with at least or about 2 fragments, 3 fragments, 4 fragments, 5 fragments, or more than 5 fragments.
  • the length of each of the nucleic acid fragments or average length of the nucleic acids synthesized may be at least or about 50, 75,
  • the length is about 50 to 600, 75 to 575, 100 to 550, 125 to 525, 150 to 500, 175 to 475, 200 to 450, 225 to 425, 250 to 400, 275 to 375, or 300 to 350 base pairs.
  • Libraries comprising nucleic acids encoding for immunoglobulin scaffolds as described herein comprise various lengths of amino acids when translated.
  • the length of each of the amino acid fragments or average length of the amino acid synthesized may be at least or about 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125,
  • the length of the amino acid is about 15 to 150, 20 to 145, 25 to 140, 30 to 135, 35 to 130, 40 to 125, 45 to 120, 50 to 115,
  • the immunoglobulin scaffolds comprise at least or about 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 2000, 3000, 4000, 5000, or more than 5000 amino acids.
  • a number of variant sequences for the at least one region of the immunoglobulin for variation are de novo synthesized using methods as described herein. In some instances, a number of variant sequences is de novo synthesized for CDRH1, CDRH2, CDRH3, CDRL1, CDRL2, CDRL3, VL, VH, or combinations thereof. In some instances, a number of variant sequences is de novo synthesized for framework element 1 (FW1), framework element 2 (FW2), framework element 3 (FW3), or framework element 4 (FW4).
  • the number of variant sequences may be at least or about 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, or more than 500 sequences.
  • the number of variant sequences is at least or about 500, 600, 700, 800, 900, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, or more than 8000 sequences.
  • the number of variant sequences is about 10 to 500, 25 to 475, 50 to 450, 75 to 425, 100 to 400, 125 to 375, 150 to 350, 175 to 325, 200 to 300, 225 to 375, 250 to 350, or 275 to 325 sequences.
  • Variant sequences for the at least one region of the immunoglobulin vary in length or sequence.
  • the at least one region that is de novo synthesized is for CDRH1, CDRH2, CDRH3, CDRL1, CDRL2, CDRL3, VL, VH, or combinations thereof.
  • the at least one region that is de novo synthesized is for framework element 1 (FW1), framework element 2 (FW2), framework element 3 (FW3), or framework element 4 (FW4).
  • the variant sequence comprises at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15,
  • the variant sequence comprises at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, or 50 additional nucleotides or amino acids as compared to wild-type. In some instances, the variant sequence comprises at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, or 50 less nucleotides or amino acids as compared to wild-type. In some instances, the libraries comprise at least or about 10 1 , 10 2 , 10 3 , 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 , 10 10 , or more than 10 10 variants.
  • scaffold libraries may be used for screening and analysis.
  • scaffold libraries are assayed for library displayability and panning.
  • displayability is assayed using a selectable tag.
  • Exemplary tags include, but are not limited to, a radioactive label, a fluorescent label, an enzyme, a chemiluminescent tag, a colorimetric tag, an affinity tag or other labels or tags that are known in the art.
  • the tag is histidine, polyhistidine, myc, hemagglutinin (HA), or FLAG.
  • scaffold libraries are assayed by sequencing using various methods including, but not limited to, single molecule real-time (SMRT) sequencing, Polony sequencing, sequencing by ligation, reversible terminator sequencing, proton detection sequencing, ion semiconductor sequencing, nanopore sequencing, electronic sequencing, pyrosequencing, Maxam-Gilbert sequencing, chain termination (e.g., Sanger) sequencing, +S sequencing, or sequencing by synthesis.
  • SMRT single molecule real-time
  • the scaffold libraries are assayed for functional activity, structural stability (e.g., thermal stable or pH stable), expression, specificity, or a combination thereof.
  • the scaffold libraries are assayed for scaffolds capable of folding.
  • a region of the antibody is assayed for functional activity, structural stability, expression, specificity, folding, or a combination thereof.
  • a VH region or VL region is assayed for functional activity, structural stability, expression, specificity, folding, or a combination thereof.
  • adenosine A2A receptor binding libraries comprising nucleic acids encoding for scaffolds comprising sequences for adenosine A2A receptor binding domains.
  • the scaffolds are immunoglobulins.
  • the scaffolds comprising sequences for adenosine A2A receptor binding domains are determined by interactions between the adenosine A2A receptor binding domains and the adenosine A2A receptor.
  • libraries comprising nucleic acids encoding scaffolds comprising adenosine A2A receptor binding domains, wherein the adenosine A2A receptor binding domains are designed based on surface interactions on adenosine A2A receptor.
  • the adenosine A2A receptor binding domain comprises a sequence as defined by SEQ ID NO: 1.
  • the adenosine A2A receptor binding domains interact with the amino- or carboxy- terminus of the adenosine A2A receptor.
  • the adenosine A2A receptor binding domains interact with at least one transmembrane domain including, but not limited to, transmembrane domain 1 (TM1), transmembrane domain 2 (TM2), transmembrane domain 3 (TM3), transmembrane domain 4 (TM4), transmembrane domain 5 (TM5), transmembrane domain 6 (TM6), and transmembrane domain 7 (TM7).
  • the adenosine A2A receptor binding domains interact with an intracellular surface of the adenosine A2A receptor.
  • the adenosine A2A receptor binding domains interact with at least one intracellular loop including, but not limited to, intracellular loop 1 (ICL1), intracellular loop 2 (ICL2), and intracellular loop 3 (ICL3).
  • the adenosine A2A receptor binding domains interact with an extracellular surface of the adenosine A2A receptor
  • the adenosine A2A receptor binding domains interact with at least one extracellular domain (ECD) or extracellular loop (ECL) of the adenosine A2A receptor.
  • the extracellular loops include, but are not limited to, extracellular loop 1 (ECL1), extracellular loop 2 (ECL2), and extracellular loop 3 (ECL3).
  • adenosine A2A receptor binding domains wherein the adenosine A2A receptor binding domains are designed based on surface interactions between an adenosine A2A receptor ligand and the adenosine A2A receptor.
  • the ligand is a peptide.
  • the ligand is an adenosine A2A receptor agonist. In some instances, the ligand is an adenosine A2A receptor antagonist. In some instances, the ligand is an adenosine A2A receptor allosteric modulator. In some instances, the allosteric modulator is a negative allosteric modulator. In some instances, the allosteric modulator is a positive allosteric modulator.
  • Exemplary ligands of the adenosine A2A receptor include, but are not limited to DU172, PSB36, ZM241385, XAC, caffeine, T4G, T4E, 6DY, 6DZ, 6DX, 6DV, 8Dlb, theophylline, UK-432097, adenosine, NEC A, and CGS21680.
  • Sequences of adenosine A2A receptor binding domains based on surface interactions between an adenosine A2A receptor ligand and the adenosine A2A receptor are analyzed using various methods. For example, multispecies computational analysis is performed. In some instances, a structure analysis is performed. In some instances, a sequence analysis is performed.
  • Sequence analysis can be performed using a database known in the art.
  • databases include, but are not limited to, NCBI BLAST (blast.ncbi.nlm.nih.gov/Blast.cgi), UCSC Genome Browser (genome.ucsc.edu/), UniProt (www.uniprot.org/), and IUPHAR/BPS Guide to PHARMACOLOGY (gui detopharmacol ogy . org/) .
  • adenosine A2A receptor binding domains designed based on sequence analysis among various organisms. For example, sequence analysis is performed to identify homologous sequences in different organisms. Exemplary organisms include, but are not limited to, mouse, rat, equine, sheep, cow, primate ( e.g chimpanzee, baboon, gorilla, orangutan, monkey), dog, cat, pig, donkey, rabbit, fish, fly, and human.
  • libraries comprising nucleic acids encoding for the adenosine A2A receptor binding domains may be generated.
  • libraries of adenosine A2A receptor binding domains comprise sequences of adenosine A2A receptor binding domains designed based on conformational ligand interactions, peptide ligand interactions, small molecule ligand interactions, extracellular domains of adenosine A2A receptor, or antibodies that target adenosine A2A receptor.
  • libraries of adenosine A2A receptor binding domains comprise sequences of adenosine A2A receptor binding domains designed based on peptide ligand interactions. In some instances, the ligand is a not an antibody ligand.
  • Libraries of adenosine A2A receptor binding domains may be translated to generate protein libraries. In some instances, libraries of adenosine A2A receptor binding domains are translated to generate peptide libraries, immunoglobulin libraries, derivatives thereof, or combinations thereof. In some instances, libraries of adenosine A2A receptor binding domains are translated to generate protein libraries that are further modified to generate peptidomimetic libraries. In some instances, libraries of adenosine A2A receptor binding domains are translated to generate protein libraries that are used to generate small molecules.
  • Methods described herein provide for synthesis of libraries of adenosine A2A receptor binding domains comprising nucleic acids each encoding for a predetermined variant of at least one predetermined reference nucleic acid sequence.
  • the predetermined reference sequence is a nucleic acid sequence encoding for a protein
  • the variant library comprises sequences encoding for variation of at least a single codon such that a plurality of different variants of a single residue in the subsequent protein encoded by the synthesized nucleic acid are generated by standard translation processes.
  • the libraries of adenosine A2A receptor binding domains comprise varied nucleic acids collectively encoding variations at multiple positions.
  • the variant library comprises sequences encoding for variation of at least a single codon in an adenosine A2A receptor binding domain. In some instances, the variant library comprises sequences encoding for variation of multiple codons in an adenosine A2A receptor binding domain.
  • An exemplary number of codons for variation include, but are not limited to, at least or about 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 225, 250, 275, 300, or more than 300 codons.
  • Methods described herein provide for synthesis of libraries comprising nucleic acids encoding for the adenosine A2A receptor binding domains, wherein the libraries comprise sequences encoding for variation of length of the adenosine A2A receptor binding domains.
  • the library comprises sequences encoding for variation of length of at least or about
  • the library comprises sequences encoding for variation of length of at least or about 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 200, 225, 250, 275, 300, or more than 300 codons more as compared to a predetermined reference sequence.
  • the adenosine A2A receptor binding domains may be placed in scaffolds as described herein.
  • the scaffolds are immunoglobulins.
  • the adenosine A2A receptor binding domains are placed in the CDRH3 region.
  • Adenosine A2A receptor binding domains that may be placed in scaffolds can also be referred to as a motif. Scaffolds comprising adenosine A2A receptor binding domains may be designed based on binding, specificity, stability, expression, folding, or downstream activity.
  • the scaffolds comprising adenosine A2A receptor binding domains enable contact with the adenosine A2A receptor. In some instances, the scaffolds comprising adenosine A2A receptor binding domains enables high affinity binding with the adenosine A2A receptor.
  • An exemplary amino acid sequence of adenosine A2A receptor binding domain is described in Table 1.
  • scaffolds or immunoglobulins comprising adenosine A2A receptor binding domains, wherein the sequences of the adenosine A2A receptor binding domains support interaction with adenosine A2A receptor.
  • the sequence may be homologous or identical to a sequence of an adenosine A2A receptor ligand.
  • the adenosine A2A receptor binding domain sequence comprises at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to SEQ ID NO: 1.
  • the adenosine A2A receptor binding domain sequence comprises at least or about 95% homology to SEQ ID NO: 1. In some instances, the adenosine A2A receptor binding domain sequence comprises at least or about 97% homology to SEQ ID NO: 1. In some instances, the adenosine A2A receptor binding domain sequence comprises at least or about 99% homology to SEQ ID NO: 1. In some instances, the adenosine A2A receptor binding domain sequence comprises at least or about 100% homology to SEQ ID NO: 1. In some instances, the adenosine A2A receptor binding domain sequence comprises at least a portion having at least or about 10, 20, 30, 40, 50, 60, 70, 80,
  • antibodies or immunoglobulins wherein the antibody or immunoglobulin comprises a sequence at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 540-717. In some instances, the antibody or immunoglobulin sequence comprises at least or about 95% sequence identity to any one of SEQ ID NOs: 540-717. In some instances, the antibody or immunoglobulin sequence comprises at least or about 97% sequence identity to any one of SEQ ID NOs: 540-717.
  • the antibody or immunoglobulin sequence comprises at least or about 99% sequence identity to any one of SEQ ID NOs: 540-717. In some instances, the antibody or immunoglobulin sequence comprises at least or about 100% sequence identity to any one SEQ ID NOs: 540-717. In some instances, the antibody or immunoglobulin sequence comprises at least a portion having at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, or more than 110 amino acids of any one of SEQ ID NOs: 540-717. [00105] In some embodiments, the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising a sequence as set forth in Tables 15-16.
  • CDRs complementarity determining regions
  • the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 6-539. In some instances, the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising at least or about 95% homology to any one of SEQ ID NOs: 6-539. In some instances, the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising at least or about 97% homology to any one of SEQ ID NOs: 6-539.
  • CDRs complementarity determining regions
  • the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising at least or about 99% homology to any one of SEQ ID NOs: 6-539. In some instances, the antibody or immunoglobulin sequence comprises complementarity determining regions (CDRs) comprising at least or about 100% homology to any one of SEQ ID NOs: 6-539.
  • the antibody or immunoglobulin sequence comprises a CDR1 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 6-94 or 273-361. In some instances, the antibody or immunoglobulin sequence comprises CDR1 comprising at least or about 95% homology of any one of SEQ ID NOs: 6-94 and 273-361. In some instances, the antibody or immunoglobulin sequence comprises CDR1 comprising at least or about 97% homology to any one of SEQ ID NOs: 6-94 or 273-361.
  • the antibody or immunoglobulin sequence comprises CDR1 comprising at least or about 99% homology to any one of SEQ ID NOs: 6-94 or 273-361. In some instances, the antibody or immunoglobulin sequence comprises CDR1 comprising at least or about 100% homology to any one of SEQ ID NOs: 6-270 or 273-537. In some instances, the antibody or immunoglobulin sequence comprises CDR1 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 6-94 or 273-361.
  • the antibody or immunoglobulin sequence comprises a CDR2 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 95-183 and 362-450. In some instances, the antibody or immunoglobulin sequence comprises CDR2 comprising at least or about 95% homology to any one of SEQ ID NOs: 95-183 and 362-450. In some instances, the antibody or immunoglobulin sequence comprises CDR2 comprising at least or about 97% homology to any one of SEQ ID NOs: 795-183 and 362-450.
  • the antibody or immunoglobulin sequence comprises CDR2 comprising at least or about 99% homology to any one of SEQ ID NOs: 95-183 and 362-450. In some instances, the antibody or immunoglobulin sequence comprises CDR2 comprising at least or about 100% homology to any one of SEQ ID NOs: 95-183 and 362- 450. In some instances, the antibody or immunoglobulin sequence comprises CDR2 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 95-183 and 362-450.
  • the antibody or immunoglobulin sequence comprises a CDR3 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 184-272 and 451-539. In some instances, the antibody or immunoglobulin sequence comprises CDR3 comprising at least or about 95% homology to any one of SEQ ID NOs: 184-272 and 451-539. In some instances, the antibody or immunoglobulin sequence comprises CDR3 comprising at least or about 97% homology to any one of SEQ ID NOs: 184-272 and 451-539.
  • the antibody or immunoglobulin sequence comprises CDR3 comprising at least or about 99% homology to any one of SEQ ID NOs: 184-272 and 451-539. In some instances, the antibody or immunoglobulin sequence comprises CDR3 comprising at least or about 100% homology to any one of SEQ ID NOs: 184-272 and 451- 539. In some instances, the antibody or immunoglobulin sequence comprises CDR3 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 184-272 and 451-539.
  • the antibody or immunoglobulin sequence comprises a CDRH1 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 6-94; a CDRH2 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 95-183; and a CDRH3 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 184-272.
  • the antibody or immunoglobulin sequence comprises CDRH1 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 6-94; a CDRH2 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 95-183; and a CDRH3 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 184-272.
  • the antibody or immunoglobulin sequence comprises CDRH1 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 6-94; a CDRH2 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 95-183; and a CDRH3 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 184-272.
  • the antibody or immunoglobulin sequence comprises a CDRL1 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to SEQ ID NO: 273-361; a CDRL2 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to SEQ ID NO: 362-450; and a CDRL3 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to SEQ ID NO: 451-539.
  • the antibody or immunoglobulin sequence comprises CDRL1 comprising at least or about 95%, 97%, 99%, or 100% homology to SEQ ID NO: 273-361; a CDRL2 comprising at least or about 95%, 97%, 99%, or 100% homology to SEQ ID NO: 362-450; and a CDRL3 comprising at least or about 95%, 97%, 99%, or 100% homology to SEQ ID NO: 451-539.
  • the antibody or immunoglobulin sequence comprises CDRL1 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 273-361; a CDRL2 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 362-450; and a CDRL3 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of SEQ ID NO: 451-539.
  • the antibody or immunoglobulin sequence comprises a CDRH1 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 6-94; a CDRH2 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 95-183; a CDRH3 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 184-272, a CDRL1 comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 95%, or 100% sequence identity to
  • the antibody or immunoglobulin sequence comprises CDRH1 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 6-94; a CDRH2 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 95-183; a CDRH3 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 184-272; a CDRL1 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 273-362; a CDRL2 comprising at least or about 95%, 97%, 99%, or 100% homology to any one of SEQ ID NOs: 362-450; and a CDRL3 comprising at least or about 95%, 97%,
  • the antibody or immunoglobulin sequence comprises CDRH1 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 6-94; a CDRH2 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 95-183; a CDRH3 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 184-272; a CDRL1 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 273-362; a CDRL2 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12,
  • CDRL3 comprising at least a portion having at least or about 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, or more than 16 amino acids of any one of SEQ ID NOs: 451-539.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 540-628.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least or about 95% sequence identity to any one of SEQ ID NOs: 540-628.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least or about 97% sequence identity to any one of SEQ ID NOs: 540-628.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least or about 99% sequence identity to any one of SEQ ID NOs: 540-628. In some instances, the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least or about 100% sequence identity to any one of SEQ ID NOs: 540-628. In some instances, the adenosine A2A receptor antibody or immunoglobulin sequence comprises a heavy chain variable domain comprising at least a portion having at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 30, 40, 50, 60, 70,
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least or about 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% sequence identity to any one of SEQ ID NOs: 629-717. In some instances, the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least or about 95% sequence identity to any one of SEQ ID NOs: 629-717.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least or about 97% sequence identity to any one of SEQ ID NOs: 629-717. In some instances, the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least or about 99% sequence identity to any one of SEQ ID NOs: 629-717.
  • the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least or about 100% sequence identity to any one of SEQ ID NOs: 629-717. In some instances, the adenosine A2A receptor antibody or immunoglobulin sequence comprises a light chain variable domain comprising at least a portion having at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330,
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 540; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 629.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 541; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 630.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 542; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 631. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 543; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 632.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 544; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 633. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 545; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 634.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 546; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 635. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 547; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 636.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 548; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 637.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 549; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 638.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 550; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 639. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 551; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 640.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 552; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 641.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 553; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 642.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 554; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 643.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 555; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 644.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 556; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 645. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 557; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 646.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 558; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 647. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 559; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 648.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 560; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 649. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 561; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 650.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 562; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 651.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 563; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 652.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 564; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 653.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 565; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 654.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 566; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 655.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 567; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 656.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 568; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 657. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 569; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 658.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 570; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 659. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 571; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 660.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 572; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 661. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 573; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 662.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 574; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 663. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 575; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 664.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 576; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 665. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 577; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 666.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 578; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 667. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 579; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 668.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 580; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 669. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 581; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 670.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 582; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 671.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 583; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 672.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 584; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 673. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 585; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 674.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 586; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 675. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 587; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 676.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 588; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 677. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 589; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 678.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 590; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 679. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 591; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 680.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 592; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 681.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 593; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 682.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 594; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 683.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 595; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 684.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 596; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 685. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 597; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 686.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 598; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 687. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 599; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 688.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 600; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 689.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 601; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 690.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 602; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 691.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 603; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 692.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 604; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 693.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 605; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 694.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 606; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 695. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 607; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 696.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 608; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 697. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 609; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 698.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 610; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 699. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 611; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 700.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 612; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 701. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 613; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 702.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 614; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 703.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 615; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 704.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 616; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 705.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 617; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 706.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 618; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 707.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 619; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 708.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 620; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 709. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 621; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 710.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 622; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 711. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 623; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 712.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 624; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 713.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 625; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 714.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 626; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 715. In some embodiments, the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 627; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 716.
  • the immunoglobulin heavy chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 628; and the immunoglobulin light chain comprises an amino acid sequence at least about 90% identical to that set forth in SEQ ID NO: 717.
  • adenosine A2A receptor binding libraries comprising nucleic acids encoding for scaffolds or immunoglobulins comprising adenosine A2A receptor binding domains comprise variation in domain type, domain length, or residue variation.
  • the domain is a region in the scaffold comprising the adenosine A2A receptor binding domains.
  • the region is the VH, CDRH3, or VL domain.
  • the domain is the adenosine A2A receptor binding domain.
  • Methods described herein provide for synthesis of an adenosine A2A receptor binding library of nucleic acids each encoding for a predetermined variant of at least one predetermined reference nucleic acid sequence.
  • the predetermined reference sequence is a nucleic acid sequence encoding for a protein
  • the variant library comprises sequences encoding for variation of at least a single codon such that a plurality of different variants of a single residue in the subsequent protein encoded by the synthesized nucleic acid are generated by standard translation processes.
  • the adenosine A2A receptor binding library comprises varied nucleic acids collectively encoding variations at multiple positions.
  • the variant library comprises sequences encoding for variation of at least a single codon of a VH, CDRH3, or VL domain. In some instances, the variant library comprises sequences encoding for variation of at least a single codon in an adenosine A2A receptor binding domain. For example, at least one single codon of an adenosine A2A receptor binding domain as listed in Table 1 is varied. In some instances, the variant library comprises sequences encoding for variation of multiple codons of a VH, CDRH3, or VL domain. In some instances, the variant library comprises sequences encoding for variation of multiple codons in an adenosine A2A receptor binding domain. An exemplary number of codons for variation include, but are not limited to, at least or about 1, 5,
  • Methods described herein provide for synthesis of an adenosine A2A receptor binding library of nucleic acids each encoding for a predetermined variant of at least one predetermined reference nucleic acid sequence, wherein the adenosine A2A receptor binding library comprises sequences encoding for variation of length of a domain.
  • the domain is VH, CDRH3, or VL domain.
  • the domain is the adenosine A2A receptor binding domain.
  • the library comprises sequences encoding for variation of length of at least or about 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 225, 250, 275, 300, or more than 300 codons less as compared to a predetermined reference sequence.
  • the library comprises sequences encoding for variation of length of at least or about 1, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 200, 225, 250, 275, 300, or more than 300 codons more as compared to a predetermined reference sequence.
  • adenosine A2A receptor binding libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains, wherein the adenosine A2A receptor binding libraries are synthesized with various numbers of fragments.
  • the fragments comprise the VH, CDRH3, or VL domain.
  • the adenosine A2A receptor binding libraries are synthesized with at least or about 2 fragments, 3 fragments, 4 fragments, 5 fragments, or more than 5 fragments.
  • the length of each of the nucleic acid fragments or average length of the nucleic acids synthesized may be at least or about 50, 75,
  • the length is about 50 to 600, 75 to 575, 100 to 550, 125 to 525, 150 to 500, 175 to 475, 200 to 450, 225 to 425, 250 to 400, 275 to 375, or 300 to 350 base pairs.
  • Adenosine A2A receptor binding libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains as described herein comprise various lengths of amino acids when translated. In some instances, the length of each of the amino acid fragments or average length of the amino acid synthesized may be at least or about 15, 20, 25,
  • the length of the amino acid is about
  • the length of the amino acid is about 22 to about 75 amino acids.
  • Adenosine A2A receptor binding libraries comprising de novo synthesized variant sequences encoding for scaffolds comprising adenosine A2A receptor binding domains comprise a number of variant sequences.
  • a number of variant sequences is de novo synthesized for a CDRH1, CDRH2, CDRH3, CDRL1, CDRL2, CDRL3, VL, VH, or a combination thereof.
  • a number of variant sequences is de novo synthesized for framework element 1 (FW1), framework element 2 (FW2), framework element 3 (FW3), or framework element 4 (FW4).
  • a number of variant sequences is de novo synthesized for an adenosine A2A receptor binding domain.
  • the number of variant sequences is about 1 to about 10 sequences for the VH domain, about 10 8 sequences for the adenosine A2A receptor binding domain, and about 1 to about 44 sequences for the VK domain.
  • the number of variant sequences may be at least or about 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, or more than 500 sequences. In some instances, the number of variant sequences is about 10 to 300,
  • Adenosine A2A receptor binding libraries comprising de novo synthesized variant sequences encoding for scaffolds comprising adenosine A2A receptor binding domains comprise improved diversity.
  • variants are generated by placing adenosine A2A receptor binding domain variants in immunoglobulin scaffold variants comprising N-terminal CDRH3 variations and C-terminal CDRH3 variations.
  • variants include affinity maturation variants.
  • variants include variants in other regions of the immunoglobulin including, but not limited to, CDRH1, CDRH2, CDRL1, CDRL2, and CDRL3.
  • the number of variants of the adenosine A2A receptor binding libraries is least or about 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 non-identical sequences.
  • a library comprising about 10 variant sequences for a VH region, about 237 variant sequences for a CDRH3 region, and about 43 variant sequences for a VL and CDRL3 region comprises 10 5 non-identical sequences (10 x 237 x 43).
  • libraries comprising nucleic acids encoding for an adenosine A2A receptor antibody comprising variation in at least one region of the antibody, wherein the region is the CDR region.
  • the adenosine A2A receptor antibody is a single domain antibody comprising one heavy chain variable domain such as a VHH antibody.
  • the VHH antibody comprises variation in one or more CDR regions.
  • libraries described herein comprise at least or about 1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2400, 2600, 2800, 3000, or more than 3000 sequences of a CDR1, CDR2, or CDR3.
  • libraries described herein comprise at least or about 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 sequences of a CDR1, CDR2, or CDR3.
  • the libraries comprise at least 2000 sequences of a CDR1, at least 1200 sequences for CDR2, and at least 1600 sequences for CDR3. In some instances, each sequence is non-identical.
  • the CDR1, CDR2, or CDR3 is of a variable domain, light chain (VL).
  • CDR1, CDR2, or CDR3 of a variable domain, light chain (VL) can be referred to as CDRLl, CDRL2, or CDRL3, respectively.
  • libraries described herein comprise at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2400, 2600, 2800, 3000, or more than 3000 sequences of a CDR1, CDR2, or CDR3 of the VL.
  • libraries described herein comprise at least or about 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 sequences of a CDR1, CDR2, or CDR3 of the VL.
  • the libraries comprise at least 20 sequences of a CDR1 of the VL, at least 4 sequences of a CDR2 of the VL, and at least 140 sequences of a CDR3 of the VL.
  • the libraries comprise at least 2 sequences of a CDR1 of the VL, at least 1 sequence of CDR2 of the VL, and at least 3000 sequences of a CDR3 of the VL.
  • the VL is IGKV1-39, IGKV1-9, IGKV2-28, IGKV3-11, IGKV3-15, IGKV3-20, IGKV4-1, IGLV1-51, IGLV2-14, IGLV1-40, or
  • the VL is IGKV2-28. In some instances, the VL is IGLV1-51.
  • the CDR1, CDR2, or CDR3 is of a variable domain, heavy chain (VH).
  • CDR1, CDR2, or CDR3 of a variable domain, heavy chain (VH) can be referred to as CDRH1, CDRH2, or CDRH3, respectively.
  • libraries described herein comprise at least or about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2400, 2600, 2800, 3000, or more than
  • libraries described herein comprise at least or about 10 4 , 10 5 , 10 6 , 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 sequences of a CDR1, CDR2, or CDR3 of the VH.
  • the libraries comprise at least 30 sequences of a CDR1 of the VH, at least 570 sequences of a CDR2 of the VH, and at least 10 8 sequences of a CDR3 of the VH.
  • the libraries comprise at least 30 sequences of a CDR1 of the VH, at least 860 sequences of a CDR2 of the VH, and at least 10 7 sequences of a CDR3 of the VH.
  • the VH is IGHV1-18, IGHV1-69, IGHV1-8 IGHV3-21, IGHV3-23, IGHV3-30/33rn, IGHV3-28, IGHV3-74, IGHV4-39, or IGHV4-59/61.
  • the VH is IGHV1-69, IGHV3-30, IGHV3-23, IGHV3, IGHV1-46, IGHV3-7, IGHV1, or IGHV1-8.
  • the VH is IGHV1-69 and IGHV3- 30.
  • the VH is IGHV3-23.
  • Libraries as described herein comprise varying lengths of a CDRL1, CDRL2, CDRL3, CDRH1, CDRH2, or CDRH3.
  • the length of the CDRL1, CDRL2, CDRL3, CDRH1, CDRH2, or CDRH3 comprises at least or about 5, 6, 7, 8, 9,
  • the CDRH3 comprises at least or about 12, 15, 16, 17, 20, 21, or 23 amino acids in length.
  • the CDRL1, CDRL2, CDRL3, CDRH1, CDRH2, or CDRH3 comprises a range of about 1 to about 10, about 5 to about 15, about 10 to about 20, or about 15 to about 30 amino acids in length.
  • Libraries comprising nucleic acids encoding for antibodies having variant CDR sequences as described herein comprise various lengths of amino acids when translated.
  • the length of each of the amino acid fragments or average length of the amino acid synthesized may be at least or about 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, or more than 150 amino acids.
  • the length of the amino acid is about 15 to 150, 20 to 145, 25 to 140, 30 to 135, 35 to 130, 40 to 125, 45 to 120, 50 to 115, 55 to 110, 60 to 110, 65 to 105, 70 to 100, or 75 to 95 amino acids. In some instances, the length of the amino acid is about 22 amino acids to about 75 amino acids. In some instances, the antibodies comprise at least or about 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 2000, 3000, 4000, 5000, or more than 5000 amino acids.
  • Ratios of the lengths of a CDRL1, CDRL2, CDRL3, CDRH1, CDRH2, or CDRH3 may vary in libraries described herein.
  • a CDRL1, CDRL2, CDRL3, CDRH1, CDRH2, or CDRH3 comprising at least or about 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 40, 50, 60, 70, 80, 90, or more than 90 amino acids in length comprises about 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or more than 90% of the library.
  • a CDRH3 comprising about 23 amino acids in length is present in the library at 40%, a CDRH3 comprising about 21 amino acids in length is present in the library at 30%, a CDRH3 comprising about 17 amino acids in length is present in the library at 20%, and a CDRH3 comprising about 12 amino acids in length is present in the library at 10%.
  • a CDRH3 comprising about 20 amino acids in length is present in the library at 40%, a CDRH3 comprising about 16 amino acids in length is present in the library at 30%, a CDRH3 comprising about 15 amino acids in length is present in the library at 20%, and a CDRH3 comprising about 12 amino acids in length is present in the library at 10%.
  • Libraries as described herein encoding for a VHH antibody comprise variant CDR sequences that are shuffled to generate a library with a theoretical diversity of at least or about 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 sequences.
  • the library has a final library diversity of at least or about 10 7 , 10 8 , 10 9 , 10 10 , 10 11 , 10 12 , 10 13 , 10 14 , 10 15 , 10 16 , 10 17 , 10 18 , 10 19 , 10 20 , or more than 10 20 sequences.
  • adenosine A2A receptor binding libraries encoding for an immunoglobulin.
  • the adenosine A2A receptor immunoglobulin is an antibody.
  • the adenosine A2A receptor immunoglobulin is a VHH antibody.
  • the adenosine A2A receptor immunoglobulin comprises a binding affinity (e.g., K D ) to adenosine A2A receptor of less than 1 nM, less than 1.2 nM, less than 2 nM, less than 5 nM, less than 10 nM, less than 11 nm, less than 13.5 nM, less than 15 nM, less than 20 nM, less than 25 nM, or less than 30 nM.
  • the adenosine A2A receptor immunoglobulin comprises a K D of less than 1 nM.
  • the adenosine A2A receptor immunoglobulin comprises a K D of less than 1.2 nM.
  • the adenosine A2A receptor immunoglobulin comprises a K D of less than 2 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 5 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 10 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 13.5 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 15 nM.
  • the adenosine A2A receptor immunoglobulin comprises a K D of less than 20 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 25 nM. In some instances, the adenosine A2A receptor immunoglobulin comprises a K D of less than 30 nM.
  • the adenosine A2A receptor immunoglobulin is an adenosine A2A receptor agonist. In some instances, the adenosine A2A receptor immunoglobulin is an adenosine A2A receptor antagonist. In some instances, the adenosine A2A receptor immunoglobulin is an adenosine A2A receptor allosteric modulator. In some instances, the allosteric modulator is a negative allosteric modulator. In some instances, the allosteric modulator is a positive allosteric modulator.
  • the adenosine A2A receptor immunoglobulin results in agonistic, antagonistic, or allosteric effects at a concentration of at least or about 1 nM, 2 nM, 4 nM, 6 nM, 8 nM, 10 nM, 20 nM, 30 nM, 40 nM, 50 nM, 60 nM, 70 nM, 80 nM, 90 nM, 100 nM, 120 nM, 140 nM, 160 nM, 180 nM, 200 nM, 300 nM, 400 nM, 500 nM, 600 nM, 700 nM, 800 nM, 900 nM, 1000 nM, or more than 1000 nM.
  • the adenosine A2A receptor immunoglobulin is a negative allosteric modulator. In some instances, the adenosine A2A receptor immunoglobulin is a negative allosteric modulator at a concentration of at least or about 0.001, 0.005, 0.01, 0.05, 0.1, 0.5, 1 nM, 2 nM, 4 nM, 6 nM, 8 nM, 10 nM, 20 nM, 30 nM, 40 nM, 50 nM, 60 nM, 70 nM, 80 nM, 90 nM, 100 nM, or more than 100 nM.
  • the adenosine A2A receptor immunoglobulin is a negative allosteric modulator at a concentration in a range of about 0.001 to about 100, 0.01 to about 90, about 0.1 to about 80, 1 to about 50, about 10 to about 40 nM, or about 1 to about 10 nM.
  • the adenosine A2A receptor immunoglobulin comprises an EC50 or IC50 of at least or about 0.001, 0.0025, 0.005, 0.01, 0.025, 0.05, 0.06, 0.07, 0.08, 0.9, 0.1, 0.5, 1, 2, 3, 4, 5, 6, or more than 6 nM.
  • the adenosine A2A receptor immunoglobulin comprises an EC50 or IC50 of at least or about 1 nM, 2 nM, 4 nM, 6 nM, 8 nM,
  • Adenosine A2A receptor immunoglobulins as described herein may comprise improved properties.
  • the adenosine A2A receptor immunoglobulins are monomeric.
  • the adenosine A2A receptor immunoglobulins are not prone to aggregation.
  • at least or about 70%, 75%, 80%, 85%, 90%, 95%, or 99% of the adenosine A2A receptor immunoglobulins are monomeric.
  • the adenosine A2A receptor immunoglobulins are thermostable.
  • the adenosine A2A receptor immunoglobulins result in reduced non-specific binding.
  • libraries may be used for screening and analysis. For example, libraries are assayed for library displayability and panning. In some instances, displayability is assayed using a selectable tag.
  • Exemplary tags include, but are not limited to, a radioactive label, a fluorescent label, an enzyme, a chemiluminescent tag, a colorimetric tag, an affinity tag or other labels or tags that are known in the art. In some instances, the tag is histidine, polyhistidine, myc, hemagglutinin (HA), or FLAG.
  • the adenosine A2A receptor binding libraries may comprise nucleic acids encoding scaffolds comprising adenosine A2A receptor binding domains with multiple tags such as GFP, FLAG, and Lucy as well as a DNA barcode.
  • libraries are assayed by sequencing using various methods including, but not limited to, single-molecule real-time (SMRT) sequencing, Polony sequencing, sequencing by ligation, reversible terminator sequencing, proton detection sequencing, ion semiconductor sequencing, nanopore sequencing, electronic sequencing, pyrosequencing, Maxam-Gilbert sequencing, chain termination (e.g., Sanger) sequencing, +S sequencing, or sequencing by synthesis.
  • SMRT single-molecule real-time
  • libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains, wherein the libraries have improved specificity, stability, expression, folding, or downstream activity.
  • libraries described herein are used for screening and analysis.
  • libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains, wherein the nucleic acid libraries are used for screening and analysis.
  • screening and analysis comprises in vitro , in vivo , or ex vivo assays.
  • Cells for screening include primary cells taken from living subjects or cell lines. Cells may be from prokaryotes (e.g., bacteria and fungi) or eukaryotes (e.g., animals and plants). Exemplary animal cells include, without limitation, those from a mouse, rabbit, primate, and insect.
  • cells for screening include a cell line including, but not limited to, Chinese Hamster Ovary (CHO) cell line, human embryonic kidney (HEK) cell line, or baby hamster kidney (BHK) cell line.
  • CHO Chinese Hamster Ovary
  • HEK human embryonic kidney
  • BHK baby hamster kidney
  • nucleic acid libraries described herein may also be delivered to a multicellular organism.
  • Exemplary multicellular organisms include, without limitation, a plant, a mouse, rabbit, primate, and insect.
  • Nucleic acid libraries or protein libraries encoded thereof described herein may be screened for various pharmacological or pharmacokinetic properties.
  • the libraries are screened using in vitro assays, in vivo assays, or ex vivo assays.
  • in vitro pharmacological or pharmacokinetic properties that are screened include, but are not limited to, binding affinity, binding specificity, and binding avidity.
  • Exemplary in vivo pharmacological or pharmacokinetic properties of libraries described herein that are screened include, but are not limited to, therapeutic efficacy, activity, preclinical toxicity properties, clinical efficacy properties, clinical toxicity properties, immunogenicity, potency, and clinical safety properties.
  • Pharmacological or pharmacokinetic properties that may be screened include, but are not limited to, cell binding affinity and cell activity.
  • cell binding affinity assays or cell activity assays are performed to determine agonistic, antagonistic, or allosteric effects of libraries described herein.
  • the cell activity assay is a cAMP assay.
  • libraries as described herein are compared to cell binding or cell activity of ligands of adenosine A2A receptor.
  • Libraries as described herein may be screened in cell-based assays or in non-cell-based assays.
  • non-cell-based assays include, but are not limited to, using viral particles, using in vitro translation proteins, and using protealiposomes with adenosine A2A receptor.
  • Nucleic acid libraries as described herein may be screened by sequencing.
  • next generation sequence is used to determine sequence enrichment of adenosine A2A receptor binding variants.
  • V gene distribution, J gene distribution, V gene family, CDR3 counts per length, or a combination thereof is determined.
  • clonal frequency, clonal accumulation, lineage accumulation, or a combination thereof is determined.
  • number of sequences, sequences with VH clones, clones, clones greater than 1, clonotypes, clonotypes greater than 1, lineages, simpsons, or a combination thereof is determined.
  • a percentage of non-identical CDR3s is determined. For example, the percentage of non-identical CDR3s is calculated as the number of non-identical CDR3s in a sample divided by the total number of sequences that had a CDR3 in the sample.
  • nucleic acid libraries wherein the nucleic acid libraries may be expressed in a vector.
  • Expression vectors for inserting nucleic acid libraries disclosed herein may comprise eukaryotic or prokaryotic expression vectors.
  • Exemplary expression vectors include, without limitation, mammalian expression vectors: pSF-CMV-NEO-NH2-PPT-3XFLAG, pSF- CM V -NEO-COOH-3 XFL AG, pSF-CMV-PURO-NH2-GST-TEV, pSF-OXB20-COOH-TEV- FLAG(R)-6His, pCEP4 pDEST27, pSF-CMV-Ub-KrYFP, pSF-CMV-FMDV-daGFP, pEFla- mCherry-Nl Vector, pEFla-tdTomato Vector, pSF-CMV-FMDV-Hygro, pSF-CMV-PGK-Puro,
  • nucleic acid libraries that are expressed in a vector to generate a construct comprising a scaffold comprising sequences of adenosine A2A receptor binding domains.
  • a size of the construct varies.
  • the construct comprises at least or about 500, 600, 700, 800, 900, 1000, 1100, 1300, 1400, 1500, 1600, 1700, 1800, 2000, 2400, 2600, 2800, 3000, 3200, 3400, 3600, 3800, 4000, 4200,4400, 4600, 4800, 5000, 6000, 7000, 8000, 9000, 10000, or more than 10000 bases.
  • a the construct comprises a range of about 300 to 1,000, 300 to 2,000, 300 to 3,000, 300 to 4,000, 300 to 5,000, 300 to 6,000, 300 to 7,000, 300 to 8,000, 300 to 9,000, 300 to 10,000, 1,000 to 2,000, 1,000 to 3,000, 1,000 to 4,000, 1,000 to 5,000, 1,000 to 6,000, 1,000 to 7,000, 1,000 to 8,000, 1,000 to 9,000, 1,000 to 10,000, 2,000 to 3,000, 2,000 to 4,000, 2,000 to 5,000, 2,000 to 6,000, 2,000 to 7,000, 2,000 to 8,000, 2,000 to 9,000, 2,000 to 10,000, 3,000 to 4,000, 3,000 to 5,000, 3,000 to 6,000, 3,000 to 7,000, 3,000 to 8,000, 3,000 to 9,000, 3,000 to 10,000, 4,000 to 5,000, 4,000 to 6,000, 3,000 to 6,000, 3,000 to 7,000, 3,000 to 8,000, 3,000 to 9,000, 3,000 to 10,000, 4,000 to 5,000, 4,000 to 6,000, 3,000 to 6,000, 3,000 to 7,000
  • libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains, wherein the nucleic acid libraries are expressed in a cell.
  • the libraries are synthesized to express a reporter gene.
  • Exemplary reporter genes include, but are not limited to, acetohydroxyacid synthase (AHAS), alkaline phosphatase (AP), beta galactosidase (LacZ), beta glucoronidase (GUS), chloramphenicol acetyltransferase (CAT), green fluorescent protein (GFP), red fluorescent protein (RFP), yellow fluorescent protein (YFP), cyan fluorescent protein (CFP), cerulean fluorescent protein, citrine fluorescent protein, orange fluorescent protein , cherry fluorescent protein, turquoise fluorescent protein, blue fluorescent protein, horseradish peroxidase (HRP), luciferase (Luc), nopaline synthase (NOS), octopine synthase (OCS), luciferase, and derivatives thereof.
  • AHAS acetohydroxyacid synthase
  • AP alkaline phosphatase
  • LacZ beta galactosidase
  • GUS beta glucoronidase
  • CAT chloramphenicol
  • Methods to determine modulation of a reporter gene include, but are not limited to, fluorometric methods (e.g. fluorescence spectroscopy, Fluorescence Activated Cell Sorting (FACS), fluorescence microscopy), and antibiotic resistance determination.
  • fluorometric methods e.g. fluorescence spectroscopy, Fluorescence Activated Cell Sorting (FACS), fluorescence microscopy
  • antibiotic resistance determination e.g. antibiotic resistance determination.
  • adenosine A2A receptor binding libraries comprising nucleic acids encoding for scaffolds comprising adenosine A2A receptor binding domains that may have therapeutic effects.
  • the adenosine A2A receptor binding libraries result in protein when translated that is used to treat a disease or disorder.
  • the protein is an immunoglobulin.
  • the protein is a peptidomimetic.
  • Exemplary diseases include, but are not limited to, cancer, inflammatory diseases or disorders, a metabolic disease or disorder, a cardiovascular disease or disorder, a respiratory disease or disorder, pain, a digestive disease or disorder, a reproductive disease or disorder, an endocrine disease or disorder, or a neurological disease or disorder.
  • the neurological disease or disorder is a neurodegenerative disease or disorder. In some instances, the neurological disease or disorder is Parkinson’s disease, Alzheimer’s disease, or multiple sclerosis. In some instances, the cancer is a solid cancer or a hematologic cancer. In some instances, the A2AR immunoglobulins described herein are used as a monotherapy for treating cancer. In some instances, the A2AR immunoglobulins described herein are used in combination with other therapeutic agents for treating cancer. In some instances, the A2AR immunoglobulins described herein enhance tumor vaccines, checkpoint blockade and adoptive T cell therapy.
  • an inhibitor of adenosine A2A receptor as described herein is used for treatment of a disease or disorder of the central nervous system, kidney, intestine, lung, hair, skin, bone, or cartilage.
  • an inhibitor of adenosine A2A receptor as described herein is used for sleep regulation, angiogenesis, or modulation of the immune system.
  • the subject is a mammal.
  • the subject is a mouse, rabbit, dog, or human.
  • Subjects treated by methods described herein may be infants, adults, or children.
  • Pharmaceutical compositions comprising antibodies or antibody fragments as described herein may be administered intravenously or subcutaneously.
  • Variant nucleic acid libraries described herein may comprise a plurality of nucleic acids, wherein each nucleic acid encodes for a variant codon sequence compared to a reference nucleic acid sequence.
  • each nucleic acid of a first nucleic acid population contains a variant at a single variant site.
  • the first nucleic acid population contains a plurality of variants at a single variant site such that the first nucleic acid population contains more than one variant at the same variant site.
  • the first nucleic acid population may comprise nucleic acids collectively encoding multiple codon variants at the same variant site.
  • the first nucleic acid population may comprise nucleic acids collectively encoding up to 19 or more codons at the same position.
  • the first nucleic acid population may comprise nucleic acids collectively encoding up to 60 variant triplets at the same position, or the first nucleic acid population may comprise nucleic acids collectively encoding up to 61 different triplets of codons at the same position.
  • Each variant may encode for a codon that results in a different amino acid during translation.
  • Table 3 provides a listing of each codon possible (and the representative amino acid) for a variant site.
  • a nucleic acid population may comprise varied nucleic acids collectively encoding up to 20 codon variations at multiple positions.
  • each nucleic acid in the population comprises variation for codons at more than one position in the same nucleic acid.
  • each nucleic acid in the population comprises variation for codons at 1, 2, 3, 4, 5, 6, 7, 8,
  • each variant long nucleic acid comprises variation for codons at 1, 2, 3, 4, 5, 6, 7, 8, 9,
  • the variant nucleic acid population comprises variation for codons at 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 or more codons in a single nucleic acid. In some instances, the variant nucleic acid population comprises variation for codons in at least about 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 or more codons in a single long nucleic acid.
  • Genomic information encoded in the DNA is transcribed into a message that is then translated into the protein that is the active product within a given biological pathway.
  • a library with the desired variants available at the intended frequency in the right position available for testing — in other words, a precision library, enables reduced costs as well as turnaround time for screening.
  • a drug itself can be optimized using methods described herein.
  • a variant polynucleotide library encoding for a portion of the antibody is designed and synthesized.
  • a variant nucleic acid library for the antibody can then be generated by processes described herein (e.g., PCR mutagenesis followed by insertion into a vector).
  • the antibody is then expressed in a production cell line and screened for enhanced activity.
  • Example screens include examining modulation in binding affinity to an antigen, stability, or effector function (e.g., ADCC, complement, or apoptosis).
  • Exemplary regions to optimize the antibody include, without limitation, the Fc region, Fab region, variable region of the Fab region, constant region of the Fab region, variable domain of the heavy chain or light chain (VH or VL), and specific complementarity-determining regions (CDRs) of VH or VL.
  • Nucleic acid libraries synthesized by methods described herein may be expressed in various cells associated with a disease state.
  • Cells associated with a disease state include cell lines, tissue samples, primary cells from a subject, cultured cells expanded from a subject, or cells in a model system.
  • Exemplary model systems include, without limitation, plant and animal models of a disease state.
  • a variant nucleic acid library described herein is expressed in a cell associated with a disease state, or one in which a cell a disease state can be induced.
  • an agent is used to induce a disease state in cells.
  • Exemplary tools for disease state induction include, without limitation, a Cre/Lox recombination system, LPS inflammation induction, and streptozotocin to induce hypoglycemia.
  • the cells associated with a disease state may be cells from a model system or cultured cells, as well as cells from a subject having a particular disease condition.
  • Exemplary disease conditions include a bacterial, fungal, viral, autoimmune, or proliferative disorder (e.g., cancer).
  • the variant nucleic acid library is expressed in the model system, cell line, or primary cells derived from a subject, and screened for changes in at least one cellular activity.
  • Exemplary cellular activities include, without limitation, proliferation, cycle progression, cell death, adhesion, migration, reproduction, cell signaling, energy production, oxygen utilization, metabolic activity, and aging, response to free radical damage, or any combination thereof.
  • Devices used as a surface for polynucleotide synthesis may be in the form of substrates which include, without limitation, homogenous array surfaces, patterned array surfaces, channels, beads, gels, and the like.
  • substrates comprising a plurality of clusters, wherein each cluster comprises a plurality of loci that support the attachment and synthesis of polynucleotides.
  • substrates comprise a homogenous array surface.
  • the homogenous array surface is a homogenous plate.
  • locus refers to a discrete region on a structure which provides support for polynucleotides encoding for a single predetermined sequence to extend from the surface.
  • a locus is on a two dimensional surface, e.g ., a substantially planar surface. In some instances, a locus is on a three- dimensional surface, e.g. , a well, microwell, channel, or post. In some instances, a surface of a locus comprises a material that is actively functionalized to attach to at least one nucleotide for polynucleotide synthesis, or preferably, a population of identical nucleotides for synthesis of a population of polynucleotides. In some instances, polynucleotide refers to a population of polynucleotides encoding for the same nucleic acid sequence.
  • a surface of a substrate is inclusive of one or a plurality of surfaces of a substrate.
  • the average error rates for polynucleotides synthesized within a library described here using the systems and methods provided are often less than 1 in 1000, less than about 1 in 2000, less than about 1 in 3000 or less often without error correction.
  • a substrate provides support for the synthesis of more than 50, 100,
  • the surfaces provide support for the synthesis of more than 50, 100, 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2,000; 5,000; 10,000; 20,000; 50,000; 100,000; 200,000; 300,000; 400,000; 500,000; 600,000; 700,000; 800,000; 900,000; 1,000,000; 1,200,000; 1,400,000; 1,600,000; 1,800,000; 2,000,000; 2,500,000; 3,000,000; 3,500,000; 4,000,000; 4,500,000; 5,000,000; 10,000,000 or more polynucleotides encoding for distinct sequences.
  • at least a portion of the polynucleotides have an identical sequence or are configured to be synthesized with an identical sequence.
  • the substrate provides a surface environment for the growth of polynucleotides having at least 80, 90, 100, 120, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500 bases or more.
  • each locus supports the synthesis of a population of polynucleotides.
  • each locus supports the synthesis of a population of polynucleotides having a different sequence than a population of polynucleotides grown on another locus.
  • each polynucleotide sequence is synthesized with 1, 2, 3, 4, 5, 6, 7, 8, 9 or more redundancy across different loci within the same cluster of loci on a surface for polynucleotide synthesis.
  • the loci of a substrate are located within a plurality of clusters.
  • a substrate comprises at least 10, 500, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, 20000, 30000, 40000, 50000 or more clusters.
  • a substrate comprises more than 2,000; 5,000; 10,000; 100,000; 200,000; 300,000; 400,000; 500,000; 600,000; 700,000; 800,000; 900,000; 1,000,000; 1,100,000; 1,200,000; 1,300,000; 1,400,000; 1,500,000; 1,600,000; 1,700,000; 1,800,000; 1,900,000; 2,000,000; 300,000; 400,000; 500,000; 600,000; 700,000; 800,000; 900,000; 1,000,000; 1,200,000; 1,400,000; 1,600,000; 1,800,000; 2,000,000; 2,500,000; 3,000,000; 3,500,000; 4,000,000; 4,500,000; 5,000,000; or 10,000,000 or more distinct loci.
  • a substrate comprises about 10,000 distinct loci.
  • each cluster includes 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 130, 150, 200, 300, 400, 500 or more loci. In some instances, each cluster includes about 50-500 loci. In some instances, each cluster includes about 100-200 loci. In some instances, each cluster includes about 100-150 loci. In some instances, each cluster includes about 109, 121, 130 or 137 loci. In some instances, each cluster includes about 19, 20, 61, 64 or more loci. Alternatively or in combination, polynucleotide synthesis occurs on a homogenous array surface.
  • the number of distinct polynucleotides synthesized on a substrate is dependent on the number of distinct loci available in the substrate.
  • the density of loci within a cluster or surface of a substrate is at least or about 1, 10, 25, 50, 65, 75, 100, 130, 150, 175, 200, 300, 400, 500, 1,000 or more loci per mm 2 .
  • a substrate comprises 10- 500, 25-400, 50-500, 100-500, 150-500, 10-250, 50-250, 10-200, or 50-200 mm 2 .
  • the distance between the centers of two adjacent loci within a cluster or surface is from about 10-500, from about 10-200, or from about 10-100 um.
  • the distance between two centers of adjacent loci is greater than about 10, 20, 30, 40, 50, 60, 70, 80, 90 or 100 um. In some instances, the distance between the centers of two adjacent loci is less than about 200, 150, 100, 80, 70, 60, 50, 40, 30, 20 or 10 um. In some instances, each locus has a width of about 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90 or 100 um. In some cases, each locus has a width of about 0.5-100, 0.5-50, 10-75, or 0.5-50 um.
  • the density of clusters within a substrate is at least or about 1 cluster per 100 mm 2 , 1 cluster per 10 mm 2 , 1 cluster per 5 mm 2 , 1 cluster per 4 mm 2 , 1 cluster per 3 mm 2 , 1 cluster per 2 mm 2 , 1 cluster per 1 mm 2 , 2 clusters per 1 mm 2 , 3 clusters per 1 mm 2 , 4 clusters per 1 mm 2 , 5 clusters per 1 mm 2 , 10 clusters per 1 mm 2 , 50 clusters per 1 mm 2 or more.
  • a substrate comprises from about 1 cluster per 10 mm 2 to about 10 clusters per 1 mm 2 .
  • the distance between the centers of two adjacent clusters is at least or about 50, 100, 200, 500, 1000, 2000, or 5000 um. In some cases, the distance between the centers of two adjacent clusters is between about 50-100, 50-200, 50-300, 50-500, and 100-2000 um. In some cases, the distance between the centers of two adjacent clusters is between about 0.05-50, 0.05-10, 0.05-5, 0.05-4, 0.05-3, 0.05-2, 0.1-10, 0.2-10, 0.3-10, 0.4-10, 0.5-10, 0.5-5, or 0.5-2 mm. In some cases, each cluster has a cross section of about 0.5 to about 2, about 0.5 to about 1, or about 1 to about 2 mm.
  • each cluster has a cross section of about 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2 mm. In some cases, each cluster has an interior cross section of about 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.15, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2 mm.
  • a substrate is about the size of a standard 96 well plate, for example between about 100 and about 200 mm by between about 50 and about 150 mm.
  • a substrate has a diameter less than or equal to about 1000, 500, 450, 400, 300, 250, 200, 150, 100 or 50 mm.
  • the diameter of a substrate is between about 25-1000, 25-800, 25- 600, 25-500, 25-400, 25-300, or 25-200 mm.
  • a substrate has a planar surface area of at least about 100; 200; 500; 1,000; 2,000; 5,000; 10,000; 12,000; 15,000; 20,000; 30,000; 40,000; 50,000 mm 2 or more.
  • the thickness of a substrate is between about 50- 2000, 50- 1000, 100-1000, 200-1000, or 250-1000 mm.
  • Substrates, devices, and reactors provided herein are fabricated from any variety of materials suitable for the methods, compositions, and systems described herein.
  • substrate materials are fabricated to exhibit a low level of nucleotide binding.
  • substrate materials are modified to generate distinct surfaces that exhibit a high level of nucleotide binding.
  • substrate materials are transparent to visible and/or UV light.
  • substrate materials are sufficiently conductive, e.g ., are able to form uniform electric fields across all or a portion of a substrate.
  • conductive materials are connected to an electric ground.
  • the substrate is heat conductive or insulated.
  • a substrate comprises flexible materials.
  • materials can include, without limitation: nylon, both modified and unmodified, nitrocellulose, polypropylene, and the like.
  • a substrate comprises rigid materials.
  • materials can include, without limitation: glass; fuse silica; silicon, plastics (for example polytetraflouroethylene, polypropylene, polystyrene, polycarbonate, and blends thereof, and the like); metals (for example, gold, platinum, and the like).
  • the substrate, solid support or reactors can be fabricated from a material selected from the group consisting of silicon, polystyrene, agarose, dextran, cellulosic polymers, polyacrylamides, polydimethylsiloxane (PDMS), and glass.
  • the substrates/solid supports or the microstructures, reactors therein may be manufactured with a combination of materials listed herein or any other suitable material known in the art.
  • a substrate for the methods, compositions, and systems described herein, wherein the substrates have a surface architecture suitable for the methods, compositions, and systems described herein.
  • a substrate comprises raised and/or lowered features.
  • One benefit of having such features is an increase in surface area to support polynucleotide synthesis.
  • a substrate having raised and/or lowered features is referred to as a three-dimensional substrate.
  • a three-dimensional substrate comprises one or more channels.
  • one or more loci comprise a channel.
  • the channels are accessible to reagent deposition via a deposition device such as a material deposition device.
  • reagents and/or fluids collect in a larger well in fluid communication one or more channels.
  • a substrate comprises a plurality of channels corresponding to a plurality of loci with a cluster, and the plurality of channels are in fluid communication with one well of the cluster.
  • a library of polynucleotides is synthesized in a plurality of loci of a cluster.
  • substrates for the methods, compositions, and systems described herein wherein the substrates are configured for polynucleotide synthesis.
  • the structure is configured to allow for controlled flow and mass transfer paths for polynucleotide synthesis on a surface.
  • the configuration of a substrate allows for the controlled and even distribution of mass transfer paths, chemical exposure times, and/or wash efficacy during polynucleotide synthesis.
  • the configuration of a substrate allows for increased sweep efficiency, for example by providing sufficient volume for a growing polynucleotide such that the excluded volume by the growing polynucleotide does not take up more than 50, 45, 40, 35, 30, 25, 20, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1%, or less of the initially available volume that is available or suitable for growing the polynucleotide.
  • a three-dimensional structure allows for managed flow of fluid to allow for the rapid exchange of chemical exposure.
  • segregation is achieved by differential functionalization of the surface generating active and passive regions for polynucleotide synthesis.
  • differential functionalization is achieved by alternating the hydrophobicity across the substrate surface, thereby creating water contact angle effects that cause beading or wetting of the deposited reagents.
  • Employing larger structures can decrease splashing and cross-contamination of distinct polynucleotide synthesis locations with reagents of the neighboring spots.
  • a device such as a material deposition device, is used to deposit reagents to distinct polynucleotide synthesis locations.
  • Substrates having three-dimensional features are configured in a manner that allows for the synthesis of a large number of polynucleotides (e.g ., more than about 10,000) with a low error rate (e.g, less than about 1:500, 1:1000, 1:1500, 1:2,000, 1:3,000, 1:5,000, or 1:10,000).
  • a substrate comprises features with a density of about or greater than about 1, 5, 10, 20, 30, 40, 50, 60, 70, 80, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 300, 400 or 500 features per mm 2 .
  • a well of a substrate may have the same or different width, height, and/or volume as another well of the substrate.
  • a channel of a substrate may have the same or different width, height, and/or volume as another channel of the substrate.
  • the diameter of a cluster or the diameter of a well comprising a cluster, or both is between about 0.05-50, 0.05-10, 0.05-5, 0.05-4, 0.05-3, 0.05-2, 0.05-1, 0.05-0.5, 0.05-0.1, 0.1-10, 0.2-10, 0.3-10, 0.4-10, 0.5-10, 0.5-5, or 0.5-2 mm.
  • the diameter of a cluster or well or both is less than or about 5, 4, 3, 2, 1, 0.5, 0.1, 0.09, 0.08, 0.07, 0.06, or 0.05 mm. In some instances, the diameter of a cluster or well or both is between about 1.0 and 1.3 mm. In some instances, the diameter of a cluster or well, or both is about 1.150 mm. In some instances, the diameter of a cluster or well, or both is about 0.08 mm.
  • the diameter of a cluster refers to clusters within a two-dimensional or three-dimensional substrate.
  • the height of a well is from about 20-1000, 50-1000, 100- 1000, 200- 1000, 300-1000, 400-1000, or 500-1000 um. In some cases, the height of a well is less than about 1000, 900, 800, 700, or 600 um.
  • a substrate comprises a plurality of channels corresponding to a plurality of loci within a cluster, wherein the height or depth of a channel is 5-500, 5-400, 5-300, 5- 200, 5-100, 5-50, or 10-50 um. In some cases, the height of a channel is less than 100, 80, 60, 40, or 20 um.
  • the diameter of a channel, locus (e.g., in a substantially planar substrate) or both channel and locus (e.g, in a three-dimensional substrate wherein a locus corresponds to a channel) is from about 1-1000, 1-500, 1-200, 1-100, 5-100, or 10-100 um, for example, about 90, 80, 70, 60, 50, 40, 30, 20 or 10 um. In some instances, the diameter of a channel, locus, or both channel and locus is less than about 100, 90, 80, 70, 60, 50, 40, 30, 20 or 10 um. In some instances, the distance between the center of two adjacent channels, loci, or channels and loci is from about 1-500, 1-200, 1-100, 5-200, 5-100, 5-50, or 5-30, for example, about 20 um.
  • the surface comprises various surface modifications.
  • the surface modifications are employed for the chemical and/or physical alteration of a surface by an additive or subtractive process to change one or more chemical and/or physical properties of a substrate surface or a selected site or region of a substrate surface.
  • surface modifications include, without limitation, (1) changing the wetting properties of a surface, (2) functionalizing a surface, i.e., providing, modifying or substituting surface functional groups, (3) defunctionalizing a surface, i.e., removing surface functional groups, (4) otherwise altering the chemical composition of a surface, e.g ., through etching, (5) increasing or decreasing surface roughness, (6) providing a coating on a surface, e.g. , a coating that exhibits wetting properties that are different from the wetting properties of the surface, and/or (7) depositing particulates on a surface.
  • adhesion promoter facilitates structured patterning of loci on a surface of a substrate.
  • exemplary surfaces for application of adhesion promotion include, without limitation, glass, silicon, silicon dioxide and silicon nitride.
  • the adhesion promoter is a chemical with a high surface energy.
  • a second chemical layer is deposited on a surface of a substrate.
  • the second chemical layer has a low surface energy.
  • surface energy of a chemical layer coated on a surface supports localization of droplets on the surface. Depending on the patterning arrangement selected, the proximity of loci and/or area of fluid contact at the loci are alterable.
  • a substrate surface, or resolved loci, onto which nucleic acids or other moieties are deposited, e.g. , for polynucleotide synthesis are smooth or substantially planar (e.g, two-dimensional) or have irregularities, such as raised or lowered features (e.g, three- dimensional features).
  • a substrate surface is modified with one or more different layers of compounds. Such modification layers of interest include, without limitation, inorganic and organic layers such as metals, metal oxides, polymers, small organic molecules and the like.
  • resolved loci of a substrate are functionalized with one or more moieties that increase and/or decrease surface energy. In some cases, a moiety is chemically inert.
  • a moiety is configured to support a desired chemical reaction, for example, one or more processes in a polynucleotide synthesis reaction.
  • the surface energy, or hydrophobicity, of a surface is a factor for determining the affinity of a nucleotide to attach onto the surface.
  • a method for substrate functionalization comprises: (a) providing a substrate having a surface that comprises silicon dioxide; and (b) silanizing the surface using, a suitable silanizing agent described herein or otherwise known in the art, for example, an organofunctional alkoxysilane molecule. Methods and functionalizing agents are described in U.S. Patent No. 5474796, which is herein incorporated by reference in its entirety.
  • a substrate surface is functionalized by contact with a derivatizing composition that contains a mixture of silanes, under reaction conditions effective to couple the silanes to the substrate surface, typically via reactive hydrophilic moieties present on the substrate surface.
  • Silanization generally covers a surface through self-assembly with organofunctional alkoxysilane molecules.
  • a variety of siloxane functionalizing reagents can further be used as currently known in the art, e.g ., for lowering or increasing surface energy.
  • the organofunctional alkoxysilanes are classified according to their organic functions.
  • Methods of the current disclosure for polynucleotide synthesis may include processes involving phosphoramidite chemistry.
  • polynucleotide synthesis comprises coupling a base with phosphoramidite.
  • Polynucleotide synthesis may comprise coupling a base by deposition of phosphoramidite under coupling conditions, wherein the same base is optionally deposited with phosphoramidite more than once, i.e., double coupling.
  • Polynucleotide synthesis may comprise capping of unreacted sites. In some instances, capping is optional.
  • Polynucleotide synthesis may also comprise oxidation or an oxidation step or oxidation steps.
  • Polynucleotide synthesis may comprise deblocking, detritylation, and sulfurization. In some instances, polynucleotide synthesis comprises either oxidation or sulfurization. In some instances, between one or each step during a polynucleotide synthesis reaction, the device is washed, for example, using tetrazole or acetonitrile. Time frames for any one step in a phosphoramidite synthesis method may be less than about 2 min, 1 min, 50 sec, 40 sec, 30 sec, 20 sec and 10 sec.
  • Polynucleotide synthesis using a phosphoramidite method may comprise a subsequent addition of a phosphoramidite building block (e.g, nucleoside phosphoramidite) to a growing polynucleotide chain for the formation of a phosphite triester linkage.
  • Phosphoramidite polynucleotide synthesis proceeds in the 3’ to 5’ direction.
  • Phosphoramidite polynucleotide synthesis allows for the controlled addition of one nucleotide to a growing nucleic acid chain per synthesis cycle. In some instances, each synthesis cycle comprises a coupling step.
  • Phosphoramidite coupling involves the formation of a phosphite triester linkage between an activated nucleoside phosphoramidite and a nucleoside bound to the substrate, for example, via a linker.
  • the nucleoside phosphoramidite is provided to the device activated.
  • the nucleoside phosphoramidite is provided to the device with an activator.
  • nucleoside phosphoramidites are provided to the device in a 1.5, 2, 3, 4, 5, 6, 7, 8,
  • nucleoside phosphoramidite is added in an anhydrous environment, for example, in anhydrous acetonitrile.
  • the device is optionally washed.
  • the coupling step is repeated one or more additional times, optionally with a wash step between nucleoside phosphoramidite additions to the substrate.
  • a polynucleotide synthesis method used herein comprises 1, 2, 3 or more sequential coupling steps.
  • the nucleoside bound to the device Prior to coupling, in many cases, the nucleoside bound to the device is de-protected by removal of a protecting group, where the protecting group functions to prevent polymerization.
  • a common protecting group is 4,4’-dimethoxytrityl (DMT).
  • phosphoramidite polynucleotide synthesis methods optionally comprise a capping step.
  • a capping step the growing polynucleotide is treated with a capping agent.
  • a capping step is useful to block unreacted substrate-bound 5’ -OH groups after coupling from further chain elongation, preventing the formation of polynucleotides with internal base deletions.
  • phosphoramidites activated with lH-tetrazole may react, to a small extent, with the 06 position of guanosine. Without being bound by theory, upon oxidation with h /water, this side product, possibly via 06-N7 migration, may undergo depurination.
  • the apurinic sites may end up being cleaved in the course of the final deprotection of the polynucleotide thus reducing the yield of the full-length product.
  • the 06 modifications may be removed by treatment with the capping reagent prior to oxidation with F/water.
  • inclusion of a capping step during polynucleotide synthesis decreases the error rate as compared to synthesis without capping.
  • the capping step comprises treating the substrate-bound polynucleotide with a mixture of acetic anhydride and 1-methylimidazole. Following a capping step, the device is optionally washed.
  • the device bound growing nucleic acid is oxidized.
  • the oxidation step comprises the phosphite triester is oxidized into a tetracoordinated phosphate triester, a protected precursor of the naturally occurring phosphate diester internucleoside linkage.
  • oxidation of the growing polynucleotide is achieved by treatment with iodine and water, optionally in the presence of a weak base (e.g ., pyridine, lutidine, collidine). Oxidation may be carried out under anhydrous conditions using, e.g. tert-Butyl hydroperoxide or (lS)-(+)- (lO-camphorsulfonyl)-oxaziridine (CSO).
  • a capping step is performed following oxidation. A second capping step allows for device drying, as residual water from oxidation that may persist can inhibit subsequent coupling. Following oxidation, the device and growing polynucleotide is optionally washed.
  • the step of oxidation is substituted with a sulfurization step to obtain polynucleotide phosphorothioates, wherein any capping steps can be performed after the sulfurization.
  • Many reagents are capable of the efficient sulfur transfer, including but not limited to 3-(Dimethylaminomethylidene)amino)-3H-l,2,4-dithiazole-3-thione, DDTT, 3H-l,2-benzodithiol-3-one 1,1-dioxide, also known as Beaucage reagent, andN,N,N'N'- Tetraethylthiuram disulfide (TETD).
  • DDTT 3-(Dimethylaminomethylidene)amino)-3H-l,2,4-dithiazole-3-thione
  • DDTT 3H-l,2-benzodithiol-3-one 1,1-dioxide
  • Beaucage reagent also known as Beaucage reagent
  • the protected 5’ end of the device bound growing polynucleotide is removed so that the primary hydroxyl group is reactive with a next nucleoside phosphoramidite.
  • the protecting group is DMT and deblocking occurs with trichloroacetic acid in dichloromethane. Conducting detritylation for an extended time or with stronger than recommended solutions of acids may lead to increased depurination of solid support-bound polynucleotide and thus reduces the yield of the desired full-length product.
  • Methods and compositions of the disclosure described herein provide for controlled deblocking conditions limiting undesired depurination reactions.
  • the device bound polynucleotide is washed after deblocking. In some instances, efficient washing after deblocking contributes to synthesized polynucleotides having a low error rate.
  • Methods for the synthesis of polynucleotides typically involve an iterating sequence of the following steps: application of a protected monomer to an actively functionalized surface (e.g, locus) to link with either the activated surface, a linker or with a previously deprotected monomer; deprotection of the applied monomer so that it is reactive with a subsequently applied protected monomer; and application of another protected monomer for linking.
  • One or more intermediate steps include oxidation or sulfurization.
  • one or more wash steps precede or follow one or all of the steps.
  • Methods for phosphoramidite-based polynucleotide synthesis comprise a series of chemical steps.
  • one or more steps of a synthesis method involve reagent cycling, where one or more steps of the method comprise application to the device of a reagent useful for the step.
  • reagents are cycled by a series of liquid deposition and vacuum drying steps.
  • substrates comprising three-dimensional features such as wells, microwells, channels and the like, reagents are optionally passed through one or more regions of the device via the wells and/or channels.
  • Methods and systems described herein relate to polynucleotide synthesis devices for the synthesis of polynucleotides.
  • the synthesis may be in parallel. For example, at least or about at least 2, 3, 4, 5, i, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 30, 35, 40, 45,
  • polynucleotides can be synthesized in parallel.
  • the total number polynucleotides that may be synthesized in parallel may be from 2-100000, 3-50000, 4- 10000, 5-1000, 6-900, 7-850, 8-800, 9-750, 10-700, 11-650, 12-600, 13-550, 14-500, 15-450, 16- 400, 17-350, 18-300, 19-250, 20-200, 21-150,22-100, 23-50, 24-45, 25-40, 30-35.
  • total number of polynucleotides synthesized in parallel may fall within any range bound by any of these values, for example 25-100.
  • the total number of polynucleotides synthesized in parallel may fall within any range defined by any of the values serving as endpoints of the range.
  • Total molar mass of polynucleotides synthesized within the device or the molar mass of each of the polynucleotides may be at least or at least about 10, 20, 30, 40, 50, 100, 250, 500,
  • each of the polynucleotides or average length of the polynucleotides within the device may be at least or about at least 10, 15, 20, 25, 30, 35, 40, 45, 50, 100, 150, 200, 300, 400, 500 nucleotides, or more.
  • the length of each of the polynucleotides or average length of the polynucleotides within the device may be at most or about at most 500, 400, 300, 200, 150, 100, 50, 45, 35, 30, 25, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10 nucleotides, or less.
  • the length of each of the polynucleotides or average length of the polynucleotides within the device may fall from 10-500, 9-400, 11-300, 12-200, 13-150, 14-100, 15-50, 16-45, 17-40, 18-35, 19-25.
  • each of the polynucleotides or average length of the polynucleotides within the device may fall within any range bound by any of these values, for example 100-300.
  • the length of each of the polynucleotides or average length of the polynucleotides within the device may fall within any range defined by any of the values serving as endpoints of the range.
  • Methods for polynucleotide synthesis on a surface allow for synthesis at a fast rate.
  • at least 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 35, 40, 45, 50, 55, 60, 70, 80, 90, 100, 125, 150, 175, 200 nucleotides per hour, or more are synthesized.
  • Nucleotides include adenine, guanine, thymine, cytosine, uridine building blocks, or analogs/modified versions thereof.
  • libraries of polynucleotides are synthesized in parallel on substrate.
  • a device comprising about or at least about 100; 1,000; 10,000; 30,000; 75,000; 100,000; 1,000,000; 2,000,000; 3,000,000; 4,000,000; or 5,000,000 resolved loci is able to support the synthesis of at least the same number of distinct polynucleotides, wherein polynucleotide encoding a distinct sequence is synthesized on a resolved locus.
  • a library of polynucleotides is synthesized on a device with low error rates described herein in less than about three months, two months, one month, three weeks, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2 days, 24 hours or less.
  • nucleic acids assembled from a polynucleotide library synthesized with low error rate using the substrates and methods described herein are prepared in less than about three months, two months, one month, three weeks, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2 days, 24 hours or less.
  • methods described herein provide for generation of a library of nucleic acids comprising variant nucleic acids differing at a plurality of codon sites.
  • a nucleic acid may have 1 site, 2 sites, 3 sites, 4 sites, 5 sites, 6 sites, 7 sites, 8 sites, 9 sites, 10 sites, 11 sites, 12 sites, 13 sites, 14 sites, 15 sites, 16 sites, 17 sites 18 sites, 19 sites, 20 sites, 30 sites, 40 sites, 50 sites, or more of variant codon sites.
  • the one or more sites of variant codon sites may be adjacent. In some instances, the one or more sites of variant codon sites may not be adjacent and separated by 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more codons.
  • a nucleic acid may comprise multiple sites of variant codon sites, wherein all the variant codon sites are adjacent to one another, forming a stretch of variant codon sites. In some instances, a nucleic acid may comprise multiple sites of variant codon sites, wherein none the variant codon sites are adjacent to one another. In some instances, a nucleic acid may comprise multiple sites of variant codon sites, wherein some the variant codon sites are adjacent to one another, forming a stretch of variant codon sites, and some of the variant codon sites are not adjacent to one another.
  • FIG. 3 illustrates an exemplary process workflow for synthesis of nucleic acids (e.g., genes) from shorter nucleic acids.
  • the workflow is divided generally into phases: (1) de novo synthesis of a single stranded nucleic acid library, (2) joining nucleic acids to form larger fragments, (3) error correction, (4) quality control, and (5) shipment.
  • an intended nucleic acid sequence or group of nucleic acid sequences is preselected. For example, a group of genes is preselected for generation.
  • a predetermined library of nucleic acids is designed for de novo synthesis.
  • Various suitable methods are known for generating high density polynucleotide arrays.
  • a device surface layer is provided.
  • chemistry of the surface is altered in order to improve the polynucleotide synthesis process. Areas of low surface energy are generated to repel liquid while areas of high surface energy are generated to attract liquids.
  • the surface itself may be in the form of a planar surface or contain variations in shape, such as protrusions or microwells which increase surface area.
  • high surface energy molecules selected serve a dual function of supporting DNA chemistry, as disclosed in International Patent Application Publication WO/2015/021080, which is herein incorporated by reference in its entirety.
  • a deposition device such as a material deposition device, is designed to release reagents in a step wise fashion such that multiple polynucleotides extend, in parallel, one residue at a time to generate oligomers with a predetermined nucleic acid sequence 302.
  • polynucleotides are cleaved from the surface at this stage.
  • Cleavage includes gas cleavage, e.g ., with ammonia or methylamine.
  • the generated polynucleotide libraries are placed in a reaction chamber.
  • the reaction chamber also referred to as “nanoreactor” is a silicon coated well, containing PCR reagents and lowered onto the polynucleotide library 303.
  • a reagent is added to release the polynucleotides from the substrate.
  • the polynucleotides are released subsequent to sealing of the nanoreactor 305. Once released, fragments of single stranded polynucleotides hybridize in order to span an entire long range sequence of DNA. Partial hybridization 305 is possible because each synthesized polynucleotide is designed to have a small portion overlapping with at least one other polynucleotide in the pool.
  • a PCA reaction is commenced.
  • the polynucleotides anneal to complementary fragments and gaps are filled in by a polymerase.
  • Each cycle increases the length of various fragments randomly depending on which polynucleotides find each other. Complementarity amongst the fragments allows for forming a complete large span of double stranded DNA 306.
  • the nanoreactor is separated from the device 307 and positioned for interaction with a device having primers for PCR 308. After sealing, the nanoreactor is subject to PCR 309 and the larger nucleic acids are amplified. After PCR 310, the nanochamber is opened 311, error correction reagents are added 312, the chamber is sealed 313 and an error correction reaction occurs to remove mismatched base pairs and/or strands with poor complementarity from the double stranded PCR amplification products 314. The nanoreactor is opened and separated 315. Error corrected product is next subject to additional processing steps, such as PCR and molecular bar coding, and then packaged 322 for shipment 323. [00199] In some instances, quality control measures are taken.
  • quality control steps include for example interaction with a wafer having sequencing primers for amplification of the error corrected product 316, sealing the wafer to a chamber containing error corrected amplification product 317, and performing an additional round of amplification 318.
  • the nanoreactor is opened 319 and the products are pooled 320 and sequenced 321. After an acceptable quality control determination is made, the packaged product 322 is approved for shipment 323.
  • a nucleic acid generated by a workflow such as that in FIG. 3 is subject to mutagenesis using overlapping primers disclosed herein.
  • a library of primers are generated by in situ preparation on a solid support and utilize single nucleotide extension process to extend multiple oligomers in parallel.
  • a deposition device such as a material deposition device, is designed to release reagents in a step wise fashion such that multiple polynucleotides extend, in parallel, one residue at a time to generate oligomers with a predetermined nucleic acid sequence 302.
  • any of the systems described herein may be operably linked to a computer and may be automated through a computer either locally or remotely.
  • the methods and systems of the disclosure may further comprise software programs on computer systems and use thereof.
  • computerized control for the synchronization of the dispense/vacuum/refill functions such as orchestrating and synchronizing the material deposition device movement, dispense action and vacuum actuation are within the bounds of the disclosure.
  • the computer systems may be programmed to interface between the user specified base sequence and the position of a material deposition device to deliver the correct reagents to specified regions of the substrate.
  • the system such as shown in FIG. 4 can include a CPU 401, disk drives 403, optional input devices such as keyboard 415 and/or mouse 416 and optional monitor 407.
  • Data communication can be achieved through the indicated communication medium to a server at a local or a remote location.
  • the communication medium can include any means of transmitting and/or receiving data.
  • the communication medium can be a network connection, a wireless connection or an internet connection. Such a connection can provide for communication over the World Wide Web.
  • a high speed cache 504 can be connected to, or incorporated in, the processor 502 to provide a high speed memory for instructions or data that have been recently, or are frequently, used by processor 502.
  • the processor 502 is connected to a north bridge 506 by a processor bus 508.
  • the north bridge 506 is connected to random access memory (RAM) 510 by a memory bus 512 and manages access to the RAM 510 by the processor 502.
  • the north bridge 506 is also connected to a south bridge 514 by a chipset bus 516.
  • the south bridge 514 is, in turn, connected to a peripheral bus 518.
  • the peripheral bus can be, for example, PCI, PCI-X, PCI Express, or other peripheral bus.
  • the north bridge and south bridge are often referred to as a processor chipset and manage data transfer between the processor, RAM, and peripheral components on the peripheral bus 518.
  • the functionality of the north bridge can be incorporated into the processor instead of using a separate north bridge chip.
  • system 500 can include an accelerator card 522 attached to the peripheral bus 518.
  • the accelerator can include field programmable gate arrays (FPGAs) or other hardware for accelerating certain processing.
  • FPGAs field programmable gate arrays
  • an accelerator can be used for adaptive data restructuring or to evaluate algebraic expressions used in extended set processing.
  • the system 500 includes an operating system for managing system resources; non-limiting examples of operating systems include: Linux, WindowsTM, MACOSTM, BlackBerry OSTM, iOSTM, and other functionally-equivalent operating systems, as well as application software running on top of the operating system for managing data storage and optimization in accordance with example instances of the present disclosure.
  • system 500 also includes network interface cards (NICs) 520 and 521 connected to the peripheral bus for providing network interfaces to external storage, such as Network Attached Storage (NAS) and other computer systems that can be used for distributed parallel processing.
  • NICs network interface cards
  • FIG. 6 is a diagram showing a network 600 with a plurality of computer systems 602a, and 602b, a plurality of cell phones and personal data assistants 602c, and Network Attached Storage (NAS) 604a, and 604b.
  • systems 602a, 602b, and 602c can manage data storage and optimize data access for data stored in Network Attached Storage (NAS) 604a and 604b.
  • a mathematical model can be used for the data and be evaluated using distributed parallel processing across computer systems 602a, and 602b, and cell phone and personal data assistant systems 602c.
  • Computer systems 602a, and 602b, and cell phone and personal data assistant systems 602c can also provide parallel processing for adaptive data restructuring of the data stored in Network Attached Storage (NAS) 604a and 604b.
  • FIG. 6 illustrates an example only, and a wide variety of other computer architectures and systems can be used in conjunction with the various instances of the present disclosure.
  • a blade server can be used to provide parallel processing.
  • Processor blades can be connected through a back plane to provide parallel processing.
  • Storage can also be connected to the back plane or as Network Attached Storage (NAS) through a separate network interface.
  • processors can maintain separate memory spaces and transmit data through network interfaces, back plane or other connectors for parallel processing by other processors.
  • some or all of the processors can use a shared virtual address memory space.
  • FIG. 7 is a block diagram of a multiprocessor computer system 700 using a shared virtual address memory space in accordance with an example instance.
  • the system includes a plurality of processors 702a-f that can access a shared memory subsystem 704.
  • the system incorporates a plurality of programmable hardware memory algorithm processors (MAPs) 706a-f in the memory subsystem 704.
  • MAPs programmable hardware memory algorithm processors
  • Each MAP 706a-f can comprise a memory 708a-f and one or more field programmable gate arrays (FPGAs) 710a-f.
  • the MAP provides a configurable functional unit and particular algorithms or portions of algorithms can be provided to the FPGAs 710a-f for processing in close coordination with a respective processor.
  • the MAPs can be used to evaluate algebraic expressions regarding the data model and to perform adaptive data restructuring in example instances.
  • each MAP is globally accessible by all of the processors for these purposes.
  • each MAP can use Direct Memory Access (DMA) to access an associated memory 708a-f, allowing it to execute tasks independently of, and asynchronously from the respective microprocessor 702a-f.
  • DMA Direct Memory Access
  • a MAP can feed results directly to another MAP for pipelining and parallel execution of algorithms.
  • the above computer architectures and systems are examples only, and a wide variety of other computer, cell phone, and personal data assistant architectures and systems can be used in connection with example instances, including systems using any combination of general processors, co-processors, FPGAs and other programmable logic devices, system on chips (SOCs), application specific integrated circuits (ASICs), and other processing and logic elements.
  • SOCs system on chips
  • ASICs application specific integrated circuits
  • all or part of the computer system can be implemented in software or hardware.
  • Any variety of data storage media can be used in connection with example instances, including random access memory, hard drives, flash memory, tape drives, disk arrays, Network Attached Storage (NAS) and other local or distributed data storage devices and systems.
  • NAS Network Attached Storage
  • the computer system can be implemented using software modules executing on any of the above or other computer architectures and systems.
  • the functions of the system can be implemented partially or completely in firmware, programmable logic devices such as field programmable gate arrays (FPGAs) as referenced in FIG. 5, system on chips (SOCs), application specific integrated circuits (ASICs), or other processing and logic elements.
  • FPGAs field programmable gate arrays
  • SOCs system on chips
  • ASICs application specific integrated circuits
  • the Set Processor and Optimizer can be implemented with hardware acceleration through the use of a hardware accelerator card, such as accelerator card 522 illustrated in FIG. 5
  • Example 1 Functionalization of a device surface
  • a device was functionalized to support the attachment and synthesis of a library of polynucleotides.
  • the device surface was first wet cleaned using a piranha solution comprising 90% H2SO4 and 10% H2O2 for 20 minutes.
  • the device was rinsed in several beakers with DI water, held under a DI water gooseneck faucet for 5 min, and dried with N2.
  • the device was subsequently soaked in NH4OH (1 : 100; 3 mL:300 mL) for 5 min, rinsed with DI water using a handgun, soaked in three successive beakers with DI water for 1 min each, and then rinsed again with DI water using the handgun.
  • the device was then plasma cleaned by exposing the device surface to O2.
  • a SAMCO PC-300 instrument was used to plasma etch O2 at 250 watts for 1 min in downstream mode.
  • the cleaned device surface was actively functionalized with a solution comprising N-(3- triethoxysilylpropyl)-4-hydroxybutyramide using a YES-1224P vapor deposition oven system with the following parameters: 0.5 to 1 torr, 60 min, 70 °C, 135 °C vaporizer.
  • the device surface was resist coated using a Brewer Science 200X spin coater. SPRTM 3612 photoresist was spin coated on the device at 2500 rpm for 40 sec. The device was pre-baked for 30 min at 90 °C on a Brewer hot plate. The device was subjected to photolithography using a Karl Suss MA6 mask aligner instrument.
  • the device was exposed for 2.2 sec and developed for 1 min in MSF 26A. Remaining developer was rinsed with the handgun and the device soaked in water for 5 min. The device was baked for 30 min at 100 °C in the oven, followed by visual inspection for lithography defects using a Nikon L200. A descum process was used to remove residual resist using the SAMCO PC-300 instrument to O2 plasma etch at 250 watts for 1 min.
  • the device surface was passively functionalized with a 100 pL solution of perfluorooctyltrichlorosilane mixed with 10 pL light mineral oil.
  • the device was placed in a chamber, pumped for 10 min, and then the valve was closed to the pump and left to stand for 10 min. The chamber was vented to air.
  • the device was resist stripped by performing two soaks for 5 min in 500 mL NMP at 70 °C with ultrasoni cation at maximum power (9 on Crest system). The device was then soaked for 5 min in 500 mL isopropanol at room temperature with ultrasonication at maximum power.
  • the device was dipped in 300 mL of 200 proof ethanol and blown dry with N2.
  • Example 2 Synthesis of a 50-mer sequence on an oligonucleotide synthesis device [00217] A two dimensional oligonucleotide synthesis device was assembled into a flowcell, which was connected to a flowcell (Applied Biosystems (ABI394 DNA Synthesizer").
  • the two- dimensional oligonucleotide synthesis device was uniformly functionalized with N-(3- TRIETHOXYSILYLPROPYL)-4-HYDROXYBUTYRAMIDE (Gelest) was used to synthesize an exemplary polynucleotide of 50 bp ("50-mer polynucleotide”) using polynucleotide synthesis methods described herein.
  • the flow restrictor was removed from the ABI 394 synthesizer to enable faster flow. Without flow restrictor, flow rates for amidites (0.1M in ACN), Activator, (0.25M Benzoylthiotetrazole ("BTT"; 30-3070-xx from GlenResearch) in ACN), and Ox (0.02M 12 in 20% pyridine, 10% water, and 70% THF) were roughly ⁇ 100uL/sec, for acetonitrile (“ACN”) and capping reagents (1 : 1 mix of CapA and CapB, wherein CapA is acetic anhydride in THF/Pyridine and CapB is 16% 1-methylimidizole in THF), roughly ⁇ 200uL/sec, and for Deblock (3% dichloroacetic acid in toluene), roughly ⁇ 300uL/sec (compared to ⁇ 50uL/sec for all reagents with flow restrictor).
  • ACN acetonitrile
  • Deblock 3% dichloroacetic acid in to
  • Example 3 Synthesis of a 100-mer sequence on an oligonucleotide synthesis device
  • 100-mer polynucleotide (“100-mer polynucleotide”; 5' CGGGATCCTTATCGTCATCGTCGTACAGATCCCGACCCATTTGCTGTCCACCAGTCATG CT AGCC AT ACC ATGATGATGATGATGATGAGAACCCCGCAT##TTTTTTTTTT3', where # denotes Thymidine-succinyl hexamide CED phosphoramidite (CLP-2244 from ChemGenes); SEQ ID NO.: 3) on two different silicon chips, the first one uniformly functionalized with N-(3- TRIETHOXYSILYLPROPYL)-4-HYDROXYBUTYRAMIDE and the second one functionalized with 5/95 mix of 11-acetoxyundec
  • Table 5 summarizes error characteristics for the sequences obtained from the polynucleotide samples from spots 1-10.
  • each heavy chain was associated with each light chain scaffold.
  • Each heavy chain scaffold was assigned 5 different long CDRH3 loop options.
  • Each light chain scaffold was assigned 5 different L3 scaffolds.
  • the heavy chain CDRH3 stems were chosen from the frequently observed long H3 loop stems (10 amino acids on the N-terminus and the C-terminus) found both across individuals and across V-gene segments.
  • the light chain scaffold L3s were chosen from heterodimers comprising long H3s.
  • the heavy chains included the following: IGHV1-69, IGHV3-30, IGHV4-49, and IGHV3-21.
  • the light chains identified included the following: IGLV3-21, IGKV3-11, IGKV2-28, IGKV1-5, IGLV1-51, IGLV1-44, and IGKV1- 13.
  • four heterodimer combinations were observed multiple times including: IGHV4-59/61-IGLV3-21, IGHV3-21-IGKV2-28, IGHV1-69-IGKV3-11, and IGHV1-69-IGKV1- 5.
  • a repertoire analysis was performed on 1,083,875 IgM+/CD27-naive B cell receptor (BCR) sequences and 1,433,011 CD27+ sequences obtained by unbiased 5’RACE from 12 healthy controls.
  • the 12 healthy controls comprised equal numbers of male and female and were made up of 4 Caucasian, 4 Asian, and 4 Hispanic individuals.
  • the repertoire analysis demonstrated that less than 1% of the human repertoire comprises BCRs with CDRH3s longer than 21 amino acids.
  • a V- gene bias was observed in the long CDR3 subrepertoire, with IGHV1-69, IGHV4-34, IGHV1-18, and IGHV1-8 showing preferential enrichment in BCRs with long H3 loops.
  • the IGHV4-34 scaffold was demonstrated to be autoreactive and had a short half-life.
  • Structural Analysis was performed using GPCR scaffolds of variant sequences and lengths were assayed.
  • the various light and heavy chains were then tested for expression and protein folding.
  • the 10 variant sequences for variable domain, heavy chain included the following: IGHV1-18, IGHV1-69, IGHV1-8 IGHV3-21, IGHV3-23, IGHV3-30/33rn, IGHV3-28, IGHV3-74, IGHV4-39, and IGHV4-59/61.
  • IGHV1-18, IGHV1-69, and IGHV3-30/33rn exhibited improved characteristics such as improved thermostability.
  • 9 variant sequences for variable domain, light chain included the following: IGKV1-39, IGKV1-9, IGKV2-28, IGKV3-11, IGKV3-15, IGKV3-20, IGKV4-1, IGLV1-51, and IGLV2-14.
  • IGKV1- 39, IGKV3-15, IGLV1-51, and IGLV2-14 exhibited improved characteristics such as improved thermostability.
  • Germline heavy chain IGHV1-69, IGHV3-30 and germline light chain IGKV1-39, IGKV3-15, IGLV1-51, IGLV2-14 framework combinations were used in the GPCR-focused phage-displayed library, and all six CDR diversities were encoded by oligo pools synthesized similar to Examples 1-3 above. The CDRs were also screened to ensure they did not contain manufacturability liabilities, cryptic splice sites, or commonly used nucleotide restriction sites.
  • the heavy chain variable region (VH) and light chain variable region (VL) were linked by (G4S)3 linker.
  • the resulting scFv (VH-linker-VL) gene library was cloned into a pADL 22-2c (Antibody Design Labs) phage display vector by Notl restriction digestion and electroporated into TGI electro-competent A. coli cells. (Lucigen).
  • the final library has a diversity of 1.1 x 10 10 size which was verified by NGS.
  • phage particles were blocked with 5% BSA/PBS and depleted for non-specific binders on CHO parent cells.
  • the input phage aliquot was rotated at 14 rpm/min with 1 xlO 8 CHO parent cells for 1 hour at room temperature (RT).
  • the cells were then pelleted by centrifuging at 1,200 rpm for 10 mins in a tabletop Eppendorf centrifuge 5920RS/4xl000 rotor to deplete the non-specific CHO cell binders.
  • the phage supernatant and GLP-1R expressing CHO cells were rotated at 14 rpm/min for 1 hour at RT to select for GLP-1R binders. After incubation, the cells were washed several times with lx PBS/0.5% Tween to remove non-binding clones.
  • trypsin in PBS buffer for 30 minutes at 37°C. The cells were pelleted by centrifuging at 1,200 rpm for 10 mins.
  • the output supernatant enriched in GLP-1R binding clones was amplified in TGI E.coli cells to use as input phage for the next round of selection. This selection strategy was repeated for five rounds. Every round was depleted against the CHO parent background. Amplified output phage from a round was used as the input phage for the subsequent round, and the stringency of washes were increased in each subsequent round of selections with more washes. After five rounds of selection, 500 clones from each of round 4 and round 5 were Sanger sequenced to identify unique clones.
  • the phagemid DNA was miniprepped from the output bacterial stocks of all panning rounds.
  • the variable heavy chain (VH) was PCR amplified from the phagemid DNA using the Forward Primer ACAGAATTCATTAAAGAGGAGAAATTAACC and reverse primer TGAACCGCCTCCACCGCTAG.
  • the PCR product was directly used for library preparation using the KAPA HyperPlus Library Preparation Kit (Kapa Biosystems, product # KK8514). To add diversity in the library, the samples were spiked with 15% PhiX Control purchased from Illumina, Inc. (product # FC-110-3001).
  • the library was then loaded onto Illumina’ s 600 cycle MiSeq Reagent Kit v3 (Illumina, product # MS-102-3003) and run on the MiSeq instrument.
  • Expi293 cells were transfected using Expifectamine (ThermoFisher, A14524) with the heavy chain and light chain DNA at a 2: 1 ratio and supernatants were harvested 4 days post transfection before cell viability dropped below 80%. Purifications were undertaken using either King Fisher (ThermoFisher) with protein A magnetic beads or Phynexus protein A column tips (Hamilton). For large scale production of IgG clones that were evaluated in in vivo mouse studies an Akta HPLC purification system (GE) was used.
  • GE Akta HPLC purification system
  • IgG characterization and quality control The purified IgGs for the positive GLP-1R binders (hits) were subjected to characterization for their purity by LabChip GXII Touch HT Protein Express high-sensitivity assay. Dithiothreitol (DTT) was used to reduce the IgG into VH and VL. IgG concentrations were measured using Lunatic (UnChain). IgG for in vivo mouse studies were further characterized by HPLC and tested for endotoxin levels (Endosafe® nexgen- PTSTM Endotoxin Testing, Charles River), with less than 5 EU per kg dosing.
  • DTT Dithiothreitol
  • GLP-1R IgG clones were tested in a binding assay coupled to flow cytometry analysis as follows: FLAG-GLP-1R-GFP expressing CHO cells (CHO-GLP-1R) and CHO-parent cells were incubated with 100 nM IgG for 1 h on ice, washed three times and incubated with Alexa 647 conjugated goat-anti-human antibody (1:200) (Jackson ImmunoResearch Laboratories, 109-605- 044) for 30 min on ice, followed by three washes, centrifuging to pellet the cells between each washing step. All incubations and washes were in buffer containing PBS+1% BSA.
  • IgG was serially diluted 1 :3 starting from 100 nM down to 0.046 nM.
  • Cells were analyzed by flow cytometry and hits (a hit is an IgG that specifically binds to CHO-GLP-1R) were identified by measuring the GFP signal against the Alexa 647 signal.
  • Flow cytometry data of binding assays with 100 nM IgG are presented as dot plots.
  • Analyses of binding assays with IgG titrations are presented as binding curves plotting IgG concentrations against MFI (mean fluorescence intensity).
  • GPCR interactions which include interactions of GPCRs with ligands, peptides, antibodies, endogenous extracellular loops and small molecules were analyzed to map the GPCR binding molecular determinants. Crystal structures of almost 150 peptides, ligand or antibodies bound to ECDs of around 50 GPCRs (http://www.gpcrdb.org) were used to identify GPCR binding motifs. Over 1000 GPCR binding motifs were extracted from this analysis. In addition, by analysis of all solved structures of GPCRs (zhanglab.ccmb.med.umich.edu/GPCR- EXP/), over 2000 binding motifs from endogenous extracellular loops of GPCRs were identified.
  • CDR variants were selected by comparing the germline CDRs with the near-germline space of single, double and triple mutations observed in the CDRs within the V-gene repertoire of at least two out of 12 human donors. All CDRs have were pre-screened to remove manufacturability liabilities, cryptic splice sites or nucleotide restriction sites. The CDRs were synthesized as an oligo pool and incorporated into the selected antibody scaffolds. The heavy chain (VH) and light chain (VL) genes were linked by (G 4 S) 3 linker.
  • the resulting scFv (VH-linker-VL) gene pool was cloned into a phagemid display vector at the N-terminal of the Ml 3 gene-3 minor coat protein.
  • the final size of the GPCR library is 1 x 10 10 in a scFv format.
  • Next-generation sequencing (NGS) was performed on the final phage library to analyze the HCDR3 length distribution in the library for comparison with the HCDR3 length distribution in B-cell populations from three healthy adult donors.
  • the HCDR3 sequences from the three healthy donors used were derived from a publicly available database with over 37 million B-cell receptor sequences 31 .
  • the HCDR3 length in the GPCR library is much longer than the HCDR3 length observed in B-cell repertoire sequences.
  • the median HCDR3 length in the GPCR library (which shows a biphasic pattern of distribution) is two or three times longer (33 to 44 amino acids) than the median lengths observed in natural B-cell repertoire sequences (15 to 17 amino acids) (Fig. 11).
  • the biphasic length distribution of HCDR3 in the GPCR library is mainly caused by the two groups of stems (8aa, 9aaxxxxxl0aa, 12aa) and (14aa, 16aa xxxxxl8aa, 14aa) used to present the motifs within HCDR3.
  • VHH Ratio For the ‘VHH Ratio’ library with tailored CDR diversity, 2391 VHH sequences (iCAN database) were aligned using Clustal Omega to determine the consensus at each position and the framework was derived from the consensus at each position. The CDRs of all of the 2391 sequences were analyzed for position-specific variation, and this diversity was introduced in the library design. For the ‘VHH Shuffle’ library with shuffled CDR diversity, the iCAN database was scanned for unique CDRs in the nanobody sequences.
  • VHH-Fc demonstrate a range of affinities for TIGIT, with a low end of 12 nM KD and a high end of 1685 nM KD (data not shown).
  • FIG. 12 provides specific values for the VHH-Fc clones for ELISA, Protein A (mg/ml), and KD (nM).
  • Example 8 Hyperimmune immunoglobulin library for A2A Receptor
  • a hyperimmune immunoglobulin (IgG) library was created using similar methods as described in Example 7. Briefly, the hyperimmune IgG library was generated from analysis of databases of human naive and memory B-cell receptor sequences consisting of more than 37 million unique IgH sequences from each of 3 healthy donors. More than two million CDRH3 sequences were gathered from the analysis and individually constructed using methods similar to Examples 1-3. The CDRH3 sequences were incorporated into the VHH hShuffle library described in Example 9. The final library diversity was determined to be 1.3 x 10 10 . A schematic of the design can be seen in FIG. 13.
  • This Example shows generation of a VHH library for the A2AR with high affinity and K D values in the sub-nanomolar range.
  • a GPCR library was created using a CDR randomization scheme.
  • GPCR libraries were designed based on GPCR antibody sequences. Over sixty different GPCR antibodies were analyzed and sequences from these GPCRs were modified using a CDR randomization scheme.
  • the heavy chain IGHV3-23 design is seen in FIG. 15A.
  • IGHV3- 23 CDRH3’s had four distinctive lengths: 23 amino acids, 21 amino acids, 17 amino acids, and 12 amino acids, with each length having its residue diversity.
  • the ratio for the four lengths were the following: 40% for the CDRH3 23 amino acids in length, 30% for the CDRH3 21 amino acids in length, 20% for the CDRH3 17 amino acids in length, and 10% for the CDRH3 12 amino acids in length.
  • the CDRH3 diversity was determined to be 9.3 x 10 8
  • the full heavy chain IGHV3-23 diversity was 1.9 x 10 13 .
  • the heavy chain IGHV1-69 design is seen in FIG. 15B.
  • IGHV1- 69 CDRH3’s had four distinctive lengths: 20 amino acids, 16 amino acids, 15 amino acids, and 12 amino acids, with each length having its residue diversity.
  • the ratio for the four lengths were the following: 40% for the CDRH3 20 amino acids in length, 30% for the CDRH3 16 amino acids in length, 20% for the CDRH3 15 amino acids in length, and 10% for the CDRH3 12 amino acids in length.
  • the CDRH3 diversity was determined to be 9 10 7 , and the full heavy chain IGHV-69 diversity is 4.1 x 10 12 .
  • the light chains IGKV 2-28 and IGLV 1-51 design is seen in FIG. 15C.
  • Antibody light chain CDR sequences were analyzed for position-specific variation.
  • Two light chain frameworks were selected with fixed CDR lengths.
  • the theoretical diversities were determined to be 13800 and 5180 for kappa and light chains, respectively.
  • Example 10 Adenosine A2A Receptor Libraries with Varied CDR’s
  • An adenosine A2A receptor library is created using a CDR randomization scheme similarly described in Example 9.
  • adenosine A2A receptor libraries are designed based on GPCR antibody sequences. Over sixty different GPCR antibodies are analyzed and sequences from these GPCRs are modified using a CDR randomization scheme. Adenosine A2A receptor variant IgGs designed using the CDR randomization scheme are purified and are assayed to determine cell-based affinity measurements and for functional analysis.
  • A2AR variant immunoglobulins generated were assayed in various functional assays.
  • A2AR immunoglobulin scFv phage libraries were panned on cells and immobilized A2a proteins, and screened. The output phage numbers from each round of selection are seen in Tables 7-8.
  • FIGS. 16A-16N Binding using variants from an immune library are shown in FIGS. 16A-16N.
  • a control is shown in FIG. 160, showing cell binding with Human Adenosine A2aR monoclonal (MAB9497).
  • MAB9497 Human Adenosine A2aR monoclonal
  • Selected variants were assessed for binding at concentrations titrated from lOOnM.
  • Resulting curves are show in FIGS. 17A-17H. Binding curves are plotted with IgG concentration vs. MFI (mean fluorescence intensity). Binding using variants from a mouse immune library are shown in FIGS.
  • FIG. 18A-18N A control is shown in FIG. 180, showing cell binding with Human Adenosine A2aR monoclonal (MAB9497). Selected variants were assessed for binding at concentrations titrated from lOOnM. Resulting curves are show in FIGS. 19A-19G. Binding curves are plotted with IgG concentration vs. MFI (mean fluorescence intensity).
  • Protein Bindings [00290] Purified A2a immunoglobulins from Tables 15-18 were assayed for binding in a titration from lOOnM. Results of selected variants are shown in FIGS. 20A-20G.
  • Example 14 Antagonist Response in LANCE® cAMP Assay
  • A2A-1 and A2A-9 were assayed for allosteric modulation.
  • Cells were pre-incubated with titrated IgG for 1 hr at room temperature, followed by stimulation with fixed NECA concentration. Results are shown in FIG. 24.
  • IC50 values are shown in Table 10, indicating A2A-1 is a negative allosteric modulator.
  • FIG. 25 Calculated IC50 for A2A - 9 is shown in Table 11. Table 11.
  • Example 18 A2A cAMP antagonist titration
  • A2A-9 was assayed as described in Example 16. Resulting response curves are shown in
  • FIG. 26 Calculated IC50 values are shown in Table 12. Results indicate A2A-9 is an antagonist.
  • Example 20 A2AR Cell Functional cAMP Assays
  • Allosteric and antagonistic cAMP assays were performed using A2A cell lines [00307] Briefly, cells were pre-incubated with anti-A2AR antibody at 100 nM followed by NECA stimulation 3X titration from 100 uM. Data from a functional allosteric cAMP assay is seen in FIGS. 28A-28C. ZM241385 functioned as an antagonist. “No Ab” functioned as agonist only.
  • Example 21 Exemplary Sequences Table 15. Variable Heavy Chain CDRs

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