EP3114487A1 - Nouvelles lectines et applications pour la détection de marqueurs d'états pathologiques - Google Patents
Nouvelles lectines et applications pour la détection de marqueurs d'états pathologiquesInfo
- Publication number
- EP3114487A1 EP3114487A1 EP15711300.2A EP15711300A EP3114487A1 EP 3114487 A1 EP3114487 A1 EP 3114487A1 EP 15711300 A EP15711300 A EP 15711300A EP 3114487 A1 EP3114487 A1 EP 3114487A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ter
- lectin
- lectins
- modules
- monomeric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
- A61P31/18—Antivirals for RNA viruses for HIV
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4726—Lectins
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/46—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from vertebrates
- G01N2333/47—Assays involving proteins of known structure or function as defined in the subgroups
- G01N2333/4701—Details
- G01N2333/4724—Lectins
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2440/00—Post-translational modifications [PTMs] in chemical analysis of biological material
- G01N2440/38—Post-translational modifications [PTMs] in chemical analysis of biological material addition of carbohydrates, e.g. glycosylation, glycation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2570/00—Omics, e.g. proteomics, glycomics or lipidomics; Methods of analysis focusing on the entire complement of classes of biological molecules or subsets thereof, i.e. focusing on proteomes, glycomes or lipidomes
Definitions
- the subject of the invention is new lectins, which can be used, in particular, to specifically detect markers of pathological states.
- Lectins are proteins of eukaryotic or prokaryotic origin which bind to sugars, mono-, oligo- and polysaccharides, in a generally reversible manner, with high specificity, without modifying them.
- sugars On the cell surface, sugars are present in glycoconjugates resulting from their binding to proteins or lipids.
- glycocana is generally used to refer to the sugars of glycoconjugates.
- Lectins are usually multimeric proteins, by oligomerization or tandem repetition of monomeric units (hereinafter also referred to as "modules"), which gives them a key role in agglutination, affinity for the cell surface. , the recruitment of glycolipids, or the marking of tissues.
- the peptide chains of each module have C-ter and N ⁇ ter ends and include glycans binding sites.
- neoiectins new non-natural ectins, hereinafter referred to as neoiectins, using the concept of the natural muitlvalen of lectins and starting from lectins having an architecture of base adapted for the recognition of sugars on the outer surface of the cells.
- This approach has made it possible to create, from the existing lectins, neoiectins of valence and / or specificity which can be modulated, of great interest for diagnostic applications, in particular in oncology.
- the invention therefore aims at novel lectins or neoiectins, of high purity with optimized specificity.
- It also relates to a process for obtaining these neoiectins, based on the molecular engineering of lectins of procaryotic or eukaryotic origin, making it possible to have a large quantity, in a reproducible manner and at a lower cost, compared with the production of directed antibodies. against oligosaccharide epitopes, products of high specificity.
- the invention also aims to provide novel oligosaccharide markers of high specificity, for the recognition of cells, in particular certain pathological conditions, such as carcinogenesis.
- Neoiectins can also be applied to identify glycans in other fields of application: characterization of molecules or cells in research laboratory, quality control in pharmaceutical or food production.
- the lecines constituting the basic architecture for the neolectins of the invention are also referred to hereinafter as "reference lectins".
- These are muStimeric proteins with a p-propeller type architecture, formed of monomeric modules of about 30 to 80 amino acids, in which the glycans binding sites are located on the same side of the proteins and the C-ends. ⁇ ter and N-ter peptide chains on the other side of the proteins, which gives them very strong binding properties on the cell surface glycans.
- the invention relates to neolectins of this type, characterized in that they are formed from 4 to 7 monomer modules, one, or several or all of the adjacent modules being interconnected by linkers linking the N-terminal end. a module at the terminal end C of the adjacent module.
- the invention relates to a monomeric neolectin, formed of a single peptide chain with a free C-ter end and a free N-ter end respectively, and comprising linkers connecting the other C-terminal ends and N ⁇ ter adjacent modules constituting the lectin.
- the linkers are the same or different, and comprise peptide sequences of sufficient size to connect the C-ter and N-ter ends and advantageously comprise from 2 to 10 amino acids.
- neolectins of different valences ranging from monovalent to multivalent. More particularly, the invention relates to neolectins as defined above, characterized in that they comprise, with respect to the reference lectin, peptide chains with zero, one or more mutations in the glycane binding site of one or more monomeric modules.
- the monomeric neolectin of this embodiment is multivalent, having several glycan binding sites, or monovalent having a single glycans binding site,
- the multivalent or monovalent monomeric neolectin is a recombinant protein including linkers between modules and may also comprise one or more mutations in one or more glycans binding sites of at least 1 module. constituent, relative to the reference lectin.
- This provision confers on neolectin a specificity which can be modulated or modified as described below in relation to their method of production,
- the basic architecture of these neoiectins advantageously corresponds to that of eukaryotic or prokaryotic lectins whose crystalfographic structures are known.
- the lectins RSL (Ralstonia solanaearum lectin), BambBL (Burk ofderia ambifaria lectin), BC2LC ⁇ nt (Burkholderia cenocepacia lectin), HPA (Helix pomaîia lectin), discoidin (Qictyosfeiumium discoideum lectin), CTX -B (lectin of cholera toxin) and other bacterial toxins type B5, AAA (Anguilla angullia lectin) and adenovirus lectin.
- RSL Radtonia solanaearum lectin
- BambBL Burk ofderia ambifaria lectin
- BC2LC ⁇ nt Burkholderia cenocepacia lectin
- HPA Helix pomaîia lectin
- discoidin Qictyosfeiumium discoideum lectin
- the neolectome comprises, on the side comprising the C-ter and N-ter ends of the peptide chains, one or more Lysine-type functional groups. comprising an amino group which can be coupled to labeling molecules such as fluorophores and biotin or which can be activated to fix the lectin on a surface, for example Elisa plate, gold chip, glass chip.
- the invention also relates to a process for obtaining neeolectins defined above.
- This method is characterized in that it comprises, additionally, in a reference lectin as defined cklessus, linker sequences connecting the ends Oter and N-ter adjacent monomer units, at least two adjacent modules retaining their respective ends G ⁇ ter and N-ter fibers.
- a multivalent monomeric neolectin consisting of a single peptic chain is obtained when all the C ter and N ter ends have been interconnected except for a site formed by two adjacent units with their C ter ends. and N-ter, respectively, free.
- the linkers are introduced by protein engineering by inserting a nucleic acid sequence between the sequences encoding the peptide chains of the constituent modules of the reference lectin.
- the step of passing a multivalent multivalent lectin to a monovalent monomeric lectin is advantageously coupled to a step of invalidating at least one site for fixing the peptide chains to the glycans, which makes it possible to modify the affinity of the lectin .
- the invalidation step is carried out by point mutagenesis in the peptide chain by modifying the coding nucleic sequence for one or more of the amino acids involved in the sugar binding as identified by cristaflographfque analysis and replacing it with the coding sequence of the desired amino acids.
- the structural data acquired for the targeted fectins provide a fine knowledge of their oligosaccharide binding sites.
- the amino acids involved in the binding to sugars can be very precisely targeted.
- site-directed mutagenesis it is therefore easy to replace the acid or acids important for sugar fixation with another that will not interact.
- neolectin By disabling all binding sites for glycans, with the exception of one, monovalent, monomeric neolectin is obtained which can be manipulated by its conventional protein engineering tools. From the knowledge of the crystallographic structure of the protein, a specificity to a molecule of biological interest can then be obtained. If desired, the multivalence of faectin may be restored partially or completely.
- the directed evolution is done by creating a phage display library of lecîines with a large diversity of amino acids in the slabs forming the recognition site, it is then possible to select the interesting mutants, by exampie on magnetic beads carrying the target epitope, then to characterize their specificity.
- ELISA S puce àender .. makes it possible to check the specificity of neolectins.
- Their affinity for the target oligosaccharide epitopes can be measured, for example, by mccocalorimetry of fixation and pfasmonic surface resonance.
- the monovalent neolectins whose specificity has been modified can be used in the state, after labeling with fluorescent molecules on loops accessible on the far side of the glycannic site. They can also be transformed into multivalent lectins by mutagenesis by modifying each of the previously invalidated sites to give them the new specificity. These multivalent neolectins have a very strong affinity for the glycoconjugates present on the surface of cell membranes. Their marking on the face opposite to the attachment sites makes it possible to use them subsequently for the optimal recognition of the cell surface glycosylation.
- these neolectins can be used, as a product or drug, in several fields of application involving the recognition of glycosylation epitopes on the cell surface, such as cell and cell labeling. tissue, targeting and vectorization, or inhibition of viral infection for example of HIV. Elias can also be used for the recognition of glycosylation of natural or recombinant proteins with a field of application in research laboratories or in quality control in the production of recombinant proteins such as therapeutic antibodies.
- glycobiology glycobiology by tectin chips, purification column for glycoconjugates, labeling of modified cells, etc.
- medical diagnosis identification of glycosylation change associated with certain pathological conditions such as inflammation and cancer
- biotechnology control of glycosylation of recombinant proteins produced in eukaryotic cells, such as therapeutic antibodies
- therapeutic applications targeting of active compounds and cellular internalisation, inactivation of entry of some viruses.
- neolectins for the diagnosis and monitoring of certain cancerous tumors is of great interest for the detection of tumors and their margins, as well as the monitoring of their improvement or their degradation in the case of a treatment,
- neolectins can also be used on chips to refine and standardize diagnostics. It should be noted that the neolectins of the invention can be compared to antibodies directed against carbohydrate epitopes, but have the advantage of being able to be produced more easily, in larger quantities and therefore at reduced cost. Neolectins will be produced in bacteria or eukaryotic cells by conventional biotechnology techniques. Additional labels or protein domains may be fused with neolectins to help with their production or purification. These domains may be cleaved neolectines or not, depending on the intended applications.
- FIGS. 1 to 5 show, in FIG. 1, multimeric lectins used according to the invention, having their binding sites of the invention.
- FIGS. 1 to 5 show, in FIG. 1, multimeric lectins used according to the invention, having their binding sites of the invention.
- FIGS. 5A to 5C two orthogonal views (58) and a bottom view of the crystallographic structure of an RSL neolectin ⁇ complexed with fucose (5C),
- a multivalent multimeric reference lectin (2A) consisting of 8 repetitive modules is used, each module being formed of a peptide chain comprising 2 terminal ends, respectively, N-ter and Cter, and having a glycans binding site represented by "0".
- Linkers are added to connect the C-ter and -ter ends of 2 neighboring modules, except for 2 adjacent C-ter and -ler ends. free, which leads to a monomeric monomeric Sectin (2B), formed of a single peptide chain.
- RSL neolectin consisting of 3 dimeric units 1-2, 3-4 and 5-6 is used.
- the units 2; 3 and 4; 5 are linked by a linker of sequence SEQ ID No. 1, selected by SSTVPGD because of its similarity with natural linkers.
- the nucleotide sequence coding for this peptide is inserted between the sequences coding for the peptide units in order to bind their ends C ⁇ ter and N ⁇ ter together at 2, 3 and 4; 5.
- the nucleotide sequences encoding the 1-2, 2-3 and 4-5 motifs have previously been modified to show differences between them.
- This strategy makes it possible to modify the binding sites, and thus to modify the valences at the chosen positions, which leads to different topoiogies.
- FIG. 3 shows an RSL neolectin consisting of 3 RSL reference link modules linked by the linkers and seen from below and viewed from the side. A representation is also given for an HPA lectin with linkers,
- FIGS. 4A, 4B and 4C show the sugar recognition site (4A: the respective amino acid contributions of the sugar binding site in terms of binding energy), the invalidation of the Arg site at position 17 (4B) of the initial peptide chain of the RSL module and Iectin with its 3 Arg sites invalidated (4C),
- Example 3 Crystallographic structure of a neolectin obtained by protesque engineering
- the protein was constructed from the triple replicafion of an RSL gene with inclusion of binding sequences as described above.
- the protein was recombinantly produced in E. coli and characterized.
- the affinity for fucose is identical to that of the reference iectin, and the stoichiometry is indeed 6 fucose sites per protein.
- Figures 5A and 5B show that neolectin folds well into ⁇ -propeller type architecture, with six intact fucose sites, such as reference iectin.
- the crystal structure of the neolectin / fucose complex is given in FIG. 5C with a resolution of 1.35 Ang.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Hematology (AREA)
- Immunology (AREA)
- Biomedical Technology (AREA)
- Biochemistry (AREA)
- Urology & Nephrology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Virology (AREA)
- Pathology (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- General Physics & Mathematics (AREA)
- Microbiology (AREA)
- Cell Biology (AREA)
- Analytical Chemistry (AREA)
- Genetics & Genomics (AREA)
- Biophysics (AREA)
- Gastroenterology & Hepatology (AREA)
- Zoology (AREA)
- Biotechnology (AREA)
- Communicable Diseases (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
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- Pharmacology & Pharmacy (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oncology (AREA)
- AIDS & HIV (AREA)
- Tropical Medicine & Parasitology (AREA)
- Peptides Or Proteins (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1451740A FR3018357B1 (fr) | 2014-03-04 | 2014-03-04 | Nouvelles lectines et applications pour la detection de marqueurs d'etats pathologiques |
| PCT/IB2015/051422 WO2015132699A1 (fr) | 2014-03-04 | 2015-02-26 | Nouvelles lectines et applications pour la détection de marqueurs d'états pathologiques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3114487A1 true EP3114487A1 (fr) | 2017-01-11 |
Family
ID=51210510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15711300.2A Withdrawn EP3114487A1 (fr) | 2014-03-04 | 2015-02-26 | Nouvelles lectines et applications pour la détection de marqueurs d'états pathologiques |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10247734B2 (fr) |
| EP (1) | EP3114487A1 (fr) |
| FR (1) | FR3018357B1 (fr) |
| WO (1) | WO2015132699A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420671A (zh) * | 2019-06-26 | 2019-11-08 | 南京科瑞芯生物科技有限公司 | 一种凝集素微阵列芯片及其制备方法 |
| FR3116062A1 (fr) | 2020-11-06 | 2022-05-13 | Centre National De La Recherche Scientifique (Cnrs) | Neolectine specifique et son utilisation pour detecter des microorganismes |
-
2014
- 2014-03-04 FR FR1451740A patent/FR3018357B1/fr not_active Expired - Fee Related
-
2015
- 2015-02-26 US US15/123,138 patent/US10247734B2/en not_active Expired - Fee Related
- 2015-02-26 WO PCT/IB2015/051422 patent/WO2015132699A1/fr not_active Ceased
- 2015-02-26 EP EP15711300.2A patent/EP3114487A1/fr not_active Withdrawn
Non-Patent Citations (4)
| Title |
|---|
| AMANO KOH ET AL: "Involvement of tyrosines at fucose-binding sites of Aleuria aurantia lectin: non-equal response to site-directed mutagenesis among five sites", BIOSCI. BIOTECH. BIOCHEM,, vol. 68, no. 4, 1 April 2004 (2004-04-01), pages 841 - 847, XP002599542, ISSN: 0916-8451 * |
| DAN HU ET AL: "Directed Evolution of Lectins with Sugar-binding Specificity for 6-Sulfo-galactose", JOURNAL OF BIOLOGICAL CHEMISTRY, vol. 287, no. 24, 5 April 2012 (2012-04-05), pages 20313 - 20320, XP055452027, ISSN: 0021-9258, DOI: 10.1074/jbc.M112.351965 * |
| JULIE ARNAUD ET AL: "Reduction of Lectin Valency Drastically Changes Glycolipid Dynamics in Membranes but Not Surface Avidity", ACS CHEMICAL BIOLOGY, vol. 8, no. 9, 23 July 2013 (2013-07-23), pages 1918 - 1924, XP055647344, ISSN: 1554-8929, DOI: 10.1021/cb400254b * |
| See also references of WO2015132699A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3018357B1 (fr) | 2018-05-18 |
| US10247734B2 (en) | 2019-04-02 |
| WO2015132699A1 (fr) | 2015-09-11 |
| FR3018357A1 (fr) | 2015-09-11 |
| US20170074887A1 (en) | 2017-03-16 |
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