WO2004056990A1 - 新規なニトリルヒドラターゼ - Google Patents
新規なニトリルヒドラターゼ Download PDFInfo
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- WO2004056990A1 WO2004056990A1 PCT/JP2003/016014 JP0316014W WO2004056990A1 WO 2004056990 A1 WO2004056990 A1 WO 2004056990A1 JP 0316014 W JP0316014 W JP 0316014W WO 2004056990 A1 WO2004056990 A1 WO 2004056990A1
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y402/00—Carbon-oxygen lyases (4.2)
- C12Y402/01—Hydro-lyases (4.2.1)
- C12Y402/01084—Nitrile hydratase (4.2.1.84)
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- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/88—Lyases (4.)
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- 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
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/52—Genes encoding for enzymes or proenzymes
Definitions
- the present invention relates to a novel nitrile hydratase, a gene encoding the same, a plasmid containing the gene, a cell line transformed with the plasmid, and a cell line transformed with the plasmid.
- the present invention relates to a method for producing nitrile hydrazine enzyme, and a method for producing a corresponding amide compound from a nitrile compound using a culture solution, a cell, and a treated cell obtained by culturing the cell line.
- the present invention also relates to a method for modifying the properties of an enzyme having nitril hydratase activity.
- the present invention provides an enzyme whose properties have been modified, a gene encoding the same, a plasmid containing the gene, a cell line transformed with the plasmid, and the production of nitrile hydrase using the cell line.
- the present invention relates to a method, and a method for producing a corresponding amide compound from a nitrile compound using a culture solution, a cell, and a treated cell obtained by culturing the cell line.
- the present invention is useful in the field of substance production using a biocatalyst.
- Nitrile hydratase an enzyme having nitrile hydration activity that converts a nitrile group of various compounds into an amide group by hydration, has been discovered, and a number of microorganism strains producing the enzyme have been disclosed.
- the microorganism having nitrile hydrase activity is Rhodococcus rhodochrous J1-1 (according to the Budapest Treaty, accession number FERM BP-1478, 1-chome, Higashi 1-chome, Higashi 1-chome, Tsukuba, Ibaraki Prefecture, Japan) It has been deposited at the Patent Organism Depositary Center, National Institute of Advanced Industrial Science and Technology.) ⁇ ⁇ Shudonocardia Samomo Fila (This strain is a microorganism strain preservation facility of RIKEN (2-1 Hirosawa, Wako-shi, Saitama) It is stored under the number J CM3095 and is freely available for sale to any person upon request.In accordance with the Budapest Treaty, it is deposited at the Patent Organism Depositary under the National Institute of Advanced Industrial Science and Technology under the accession number FERM BP-7379. Has been found (see Patent Documents 1 and 3).
- nitrile hydrase was isolated from these strains, and it has been confirmed that the enzyme contains two types of polypeptides, commonly called hysunitun and / 3 subunit.
- the nitrile hydrase gene was isolated from these strains, and the amino acid sequence and nucleotide sequence thereof were determined.
- plasmids capable of expressing these nitrile hydrases in transformants and cell lines transformed with the same plasmids for example, TGl / pNHJ 10H and MT-10822: these are subject to the Bush Treaty
- the former was deposited at the National Institute of Advanced Industrial Science and Technology Patent Organism Depositary under the Accession No.
- FERM BP-2777 was deposited under the Accession No. FE RM BP-5785, Tsukuba East, Ibaraki Pref. No. 1 has been deposited at the Patent Organism Depositary, the 6th National Institute of Advanced Industrial Science and Technology (AIST) on February 7, 1996.
- AIST Advanced Industrial Science and Technology
- Non-Patent Literature 1 Attempts have also been made to analyze the three-dimensional structure of nitrile hydratase, and the results of the analysis have been published as PDB numbers 1AHJ, 2AHJ, and 1 IRE. .
- a dimer in which an en subunit and a / 3 subunit are associated is a basic structural unit, and the dimer is further associated to form a tetramer, an octamer, or a 12mer (origin) It has been clarified that they form and exert their activities. In addition, the regions and structures that form the active centers have been clarified.
- the active center exists not at the position exposed to the outside of the enzyme in direct contact with the reaction solvent but at a position embedded in the enzyme. Coordination of metal atoms (cobalt atoms or iron atoms: depending on the biological species from which they originate) to the active center, which is essential for exhibiting activity, is also known. However, it has also been shown that cysteine residues in the amino acid sequence forming the region forming the active center cause post-translational oxidation. Specifically, X iCXLC!
- Patent Document 1 JP-A-2-470
- Patent Document 2 JP-A-4-21379
- Patent Document 3 JP-A-8-56684
- Patent Document 4 Japanese Patent Application Laid-Open No. 9-275978
- Patent Document 5 JP-A-11-253168
- Non-Patent Document 1 Kobayashi M, Nishiyama M, Nagasawa T, Horinouchi S, Be Advisor T, Yamada H. Cloning, nucleotide seauence and expression in Escherichia coli of two cobalt-containing nitrile hydratase genes from hodococcus rhodochrous Jl. Biochim Biophys Acta. 1991 Dec 2; 1129 (1): 23-33.
- Non-Patent Document 2 Huang W, Jia J, Cummings J, Nelson M, Schneider G,
- Non-Patent Document 3 Nagashima S, Nakasako M, Dohmae N, Tsuj iinura M, Takio K, Odaka M, Yohda M, Kamiya N, Endo I. Novel non-heme iron center of ni tri le hydratase wi th a claw sett ing of oxygen atoms. Nat Struct Biol. 1998 May; 5 (5): 347-51.
- Non-Patent Document 4 Miyanaga, A., Fushinobu, S., I to, K., and Wakagi, T.
- An object of the present invention is to provide an amino acid sequence of a nitrile hydratase having a novel substitution mutation site which does not substantially change the function.
- the purpose is to provide the nucleotide sequence of the gene.
- a plasmid containing the gene, a cell line transformed with the plasmid, a method for producing the enzyme using the cell line, and a culture solution, cells, and a cell processed product obtained by culturing the cell line are used.
- Another object of the present invention is that the activity of the nitrile hydrase is not impaired, but the activity is as follows: activity, substrate specificity, VmaX, Km, thermal stability, stability to the substrate, stability to the product. It is to provide a specific method for a method that involves changing one or more of these properties. Specifically, it is an object of the present invention to provide a method for modifying the above properties by introducing a mutation which changes the three-dimensional structure of nitrile hydratase into the nitrile hydrase enzyme.
- nitrile hydratase obtained by the modification method a gene encoding the nitrile hydratase, a plasmid containing the gene, a cell line transformed with the gene or the plasmid, and the cell line were used.
- Another object of the present invention is to provide a method for producing a corresponding amide compound from a nitrile compound using a nutrient solution, a cell, and a processed cell.
- Patent Document 4 Japanese Patent Application Laid-Open No. Hei 9-2757978
- a substitution mutation site was introduced, and the nucleotide sequence of the gene after the mutation was determined.
- a plasmid containing the gene and a cell line transformed with the plasmid were prepared.
- intensive studies have been made on production of the enzyme using the cell line and production of the corresponding amide compound from nitrile compounds using a culture solution, a cell, and a cell-treated product obtained by culturing the cell line. As a result, the present invention has been completed.
- the subunit of the nitrile hydratase according to the present invention may be any one of the 36th, 71st, 148th, and 204th amino acids of the amino acid sequence of the subunit shown in SEQ ID NO: 1. It is characterized by having an amino acid sequence having a mutation in which one or more amino acids are substituted with another amino acid.
- the / S subunit of nitrile hydratase according to the present invention is represented by SEQ ID NO: 2 in the sequence listing; 10th, 32nd, 37th, 41st, and 46th amino acid sequences of the 8 subunits , 48th, 51st, 72nd, 118th, 127th, 146th, 160th, 186th and 217th amino acids It has an amino acid sequence having a mutation in which the above amino acid is substituted with another amino acid.
- the nitrile hydratase according to the present invention has an a subunit and a ⁇ subunit, and at least one of these subunits has the above mutation.
- the gene encoding the nitrile hydrase of the present invention is characterized in that it encodes an amino acid sequence having a mutation in the above-mentioned hysunitun.
- the gene encoding s-subunit of nitrile hydratase according to the present invention is characterized by encoding the above-mentioned amino acid sequence having a mutation in ⁇ -subunit.
- the gene encoding nitrile hydrase according to the present invention has a gene encoding a subunit and a gene encoding a subunit. At least one of the bunits has the above mutation.
- the plasmid of the present invention has any one of the above-mentioned genes.
- the transformant of the present invention is characterized in that it is obtained by transforming a host cell using the above plasmid.
- the production of nitrile hydrase of the present invention comprises the step of recovering nitrile hydratase from the above-mentioned transformant, a culture solution of the transformant, or the transformant—a treated product of the culture solution. It is characterized by the following.
- the method for producing an amide compound of the present invention comprises a step of bringing the nitrile compound into contact with the above nitrile hydrazine in an aqueous medium to convert the nitrile compound into a corresponding amide compound. I do.
- a nitrile hydratase modification method was carried out by adding a change such as substitution, insertion or deletion to the amino acid in the amino acid sequence corresponding to the amino acid residue forming the region. More specifically, by performing intensive analysis by referring to the three-dimensional structure of nitrile hydrase disclosed in Non-Patent Documents 2, 3, and 4 and PDB No. 1 AH J2AH J1 IRE, Identified areas for change that suit the purpose.
- a region that forms a cavity through which the substrate passes from the outside of the enzyme to the active center or the product passes from the active center to the outside of the enzyme, and dimer formation Regions that form the interface between the participating subunits and the] 3 subunits and the interface that participates in the association between dimers were identified.
- a method for making a change such as substitution, insertion or deletion in the amino acid sequence is not particularly limited, but a mutagenesis method using a genetic recombination technique can be mentioned as an example.
- nucleotide sequence of the gene after the change is determined, a plasmid containing the gene, a cell line transformed with the gene or the plasmid are prepared, and the production of the enzyme using the cell line and the cell
- a specific amino acid residue is specified by the following steps, and the amino acid residue is substituted, inserted or deleted at one or more of the specified amino acid residues.
- Enzyme activity Substrate specificity-Vmax-Km-Thermal stabilityStability to substrateStability to product Modification method to change at least one property,
- a specific amino acid residue is specified by the following steps, and the amino acid residue is substituted, inserted or deleted at one or more of the specified amino acid residues.
- Enzyme activity ⁇ Substrate specificity ⁇ Vmax ⁇ Km ⁇ Heat stability ⁇ Stability to substrate ⁇ Stability to product Modification method to change one or more of properties
- a specific amino acid residue is specified by the following steps, and the amino acid residue is substituted, inserted, or deleted at one or more of the specified amino acid residues.
- Enzyme activity Substrate specificity-Vmax-Km-ThermostabilityStability to substrateStability to product Modification method to change at least one property,
- [A] a polypeptide consisting of an amino acid sequence showing at least 40% homology with the amino acid sequence described in SEQ ID NO: 98 in the sequence listing
- [B] a polypeptide consisting of an amino acid sequence showing 25% or more homology to the amino acid sequence set forth in SEQ ID NO: 99 in the sequence listing
- [ ⁇ ] a polypeptide consisting of an amino acid sequence homologous to the amino acid sequence encoded by ⁇ RF (open reading frame) consisting of the 704th position and the 1315th position of the nucleotide sequence set forth in SEQ ID NO: 104 in the sequence listing,
- polypeptide of [E] according to [10] Of the two polypeptides contained as components in the enzyme having nitrile hydratase activity before modification, one is the polypeptide of [E] according to [10], and the other is a lolipeptide.
- the polypeptide according to [F] wherein a specific amino acid residue is specified by the following steps, By substituting, inserting or deleting one or more of the amino acid residues, the activity, substrate specificity, Vmax, Km, thermal stability, substrate stability, and product stability of the enzyme A method of altering one or more properties of any of the
- C is cysteine
- X is serine or threonine
- L is mouth isine
- S is serine
- C 2 is cysteine sulfenic acid.
- X x ⁇ X 2 ⁇ X 3 ⁇ X 4 ⁇ X 5 represent any amino acid.
- (21) a method for preparing a modified enzyme, comprising a step of recovering the modified enzyme from a culture solution, cells, or a processed product thereof obtained by culturing the transformant according to (20).
- the amino acid sequence of nitrile hydratase having a novel mutation point which does not change the essential function of nitrile hydratase derived from Pseudonocardia samofila and the base of the gene An array is provided. Further, a plasmid containing the gene, a transformant containing the plasmid, a method for producing the enzyme using the transformant, and a method for producing a corresponding amide compound from a nitrile compound using the transformant Is provided.
- a method for modifying an enzyme having nitrile hydratase activity before modification by using a method characterized by changing a three-dimensional structure of the enzyme having nitrile hydrase activity.
- the present invention also provides a nitrile hydrase having a novel mutation point, and a gene encoding a polypeptide chain constituting the enzyme. Furthermore, a plasmid containing the gene, a transformant containing the gene or the plasmid, a method for producing the enzyme using the transformant, and a corresponding amide compound from a nitrile compound using the transformant Is provided.
- BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a restriction map of the plasmid pPT-DB1 extracted from MT10822. (Reference Example 1, Example 1, 83)
- FIG. 2 is a restriction map of a plasmid pJ1H-DB1 constructed for the active expression of nitrile hydratase derived from Rhodococcus rhodochrous J-11 strain. (Example 84)
- Co 1 El-ori Indicates the replication initiation site of the Co 1 E1 system.
- ORF that encodes the ⁇ -subunit of nitrile hydratase derived from Pseudomonadia samurai.
- P 16 ORF that encodes a protein characterized by being involved in the activation of nitrile hydratase derived from Pseudomonadia serrata.
- nhhA ORF coding for the subunit of nitrile hydrase derived from Rhodococcus rhodochrous J-1 strain.
- nhhB ORF encoding the j3 subunit of nitrile hydratase derived from Rhodococcus rhodochrous J-1 strain.
- the nitrile hydrase of the present invention is obtained by introducing a mutation into an enzyme having nitrile hydratase activity, for example, by introducing a mutation into nitrile hydratase derived from Pseudonocardia thermofila. It is obtained.
- an amino acid sequence is specifically described in the amino acid sequence shown in SEQ ID NOs: 1 and 2 in the sequence listing. It is basically composed of amino acids in at least one or more of the specified sites replaced with other amino acids. That is, the present invention provides a nitrile hydratacetase comprising a subunit represented by the sequence of 205 amino acids shown in SEQ ID NO: 1 in which at least one or more units are substituted with another amino acid.
- amino acid sequences used in nitrile hydrase obtained by introducing a mutation into nitrile hydrase derived from Pseudonocardia sa morphira include the following. included.
- (a-2) Amino acid sequence of the ⁇ -subunit shown in SEQ ID NO: 1 at positions 6, 19, 38, 77, 9 Q, 102, 106, 126, 130, 142
- the nitrile hydratase obtained by introducing a mutation into the nitrile hydrase derived from Pseudonocardia thermophila was selected from the above (a-0) to (b-2). It consists of the following components having an amino acid sequence.
- (A-1) a nitrile hydrazyme whose ⁇ subunit has the amino acid sequence containing the mutation of the above (a-1)
- (A-2) a nitrile hydratase having an amino acid sequence in which the subunit has the above mutations (a-1) and (a-2)
- (B-2) A nitrile hydrase having an amino acid sequence in which the ⁇ subunit has the above mutations (b-1) and (b-2)
- the ⁇ -subunit has the amino acid sequence containing the above mutation (a-1); and the eight subunits have the amino acid sequence of the above (b-0) nitrile hydratase.
- A-4) a subunit having the amino acid sequence containing the above mutation (a-1); and 8 subunits having an amino acid sequence containing the above mutation (b-1).
- (A-5) a subunit having the amino acid sequence containing the mutation of the above (a-1); and 3 subunits having an amino acid sequence containing the above mutation of the (b-2).
- (A-6) an amino acid sequence in which the ⁇ subunit has the above-mentioned mutation (a-1) and the ⁇ subunit has the above-mentioned mutation (b-1) and (b-2) With nitrile hydra
- A-7 a subunit having an amino acid sequence containing the above mutations (a-1) and (a-2), and an S subunit having the above amino acid sequence (b-0) Avian rehydratase
- the ⁇ subunit contains the above mutations (a-1) and (a_2). Nitrile hydratase having an amino acid sequence and a subunit having an amino acid sequence containing the mutation of the above (b-1)
- the subunit has an amino acid sequence containing the above mutations (a-1) and (a-2), and the ⁇ subunit has the amino acid sequence containing the above mutation (b-2).
- (A-10) one subunit having the amino acid sequence containing the mutations of the above (a-1) and (a-2); and 5 subunits having the above (b-1) and (b-2).
- Nitrile hydratase having an amino acid sequence containing a mutation
- (B-4) a nitrile hydrazide having a subunit having the amino acid sequence of the above (a-0) and a ⁇ subunit having an amino acid sequence containing the mutation of the above (b-1) and (b-2) -Se
- (B-5) a subunit having the amino acid sequence containing the mutation of the above (a-2); and 8 subunits containing an amino acid sequence containing the mutation of the above (b-1) and (b-2).
- amino acids other than the specified mutation site may be substituted, inserted, or deleted with amino acid within a range that does not impair the desired nitrile hydratase activity due to the mutation at the specified site. Is also good.
- the nitrile hydraidase gene obtained by introducing a mutation into the nitrile hydraidase derived from Pseudonocardia thermophila includes a gene encoding a nitrile hydraidase subunit and a gene encoding a nitrile hydraidase subunit. Includes the genetic power encoding the trityl hydratase subunit.
- a group of the genes according to the present invention include those obtained by mutagenizing the nitrile hydrase gene derived from Pseudomonadia 'Sammophylla, which encodes the amino acid sequence of the subunit. Gene; a gene encoding a subunit; and a nitrile hydrase gene having both a gene encoding an ⁇ -subunit and a gene encoding a subunit.
- G-2 a gene having a nucleotide sequence encoding the amino acid sequence having the mutations (a-1) and (a-2) described above;
- (G-3) a gene having a base sequence encoding the amino acid sequence having the mutation of (b-1) described above;
- (G-4) a gene having a base sequence encoding the amino acid sequence having the mutations of (b-1) and (b-2) described above;
- (G-3) A gene having a nucleotide sequence encoding the nitrile hydratase of any of (A-1) to (B-4) described above.
- the base sequence encoding the amino acid sequence of the ⁇ -subunit of SEQ ID NO: 1 which is the basis of the above mutation the base sequence of SEQ ID NO: 3 is preferable. Further, as the base sequence encoding the amino acid sequence of SEQ ID NO: 2; the base sequence of the above mutation, the base sequence of SEQ ID NO: 4 is preferable.
- the mutation of the above (a-2) based on SEQ ID NO: 3 is based on the nucleotide sequence of SEQ ID NO: 3 from 16th to 18th, 55th to 57th, 112th to 114th, 229th to 231st, 268th to 270th, 304th to 306th, 316th to 318th, 376th to 378th, 388th to 390th, 424th to 426th, 436th to 438th , 559th to 561th, 580th to 582th, and 607th to 609th can be obtained by substituting a part of the base sequence in which at least one base sequence is replaced with another base sequence. .
- the mutation of the above (b-1) based on SEQ ID NO: 4 is based on the nucleotide sequence of SEQ ID NO: 4 from 28th to 30th, 94th to 96th, 109th to 11th, 121-123, 136-138, 142 1 4 4th, 1 5 1st to 15 3rd, 2 1 4th to 2 16th, 3 5 2nd to 3 54th, 3 7 9th to 3 1st, 4 3 6 4th to 4th, 478th to 480th, 556th to 558th, and 649th to 651st It can be obtained by substituting with the nucleotide sequence of
- the mutation of the above (b-2) based on SEQ ID NO: 4 is based on the nucleotide sequence of SEQ ID NO: 4 from 58th to 60th, 61st to 63rd, and 32nd Substitute a part of the base sequence obtained by substituting one or more base sequences from 324 to 324, 598 to 600, and 634 to 636 with another base sequence You can get it.
- substitutions are made in such a range that the activity of nitrile hydratase, which is encoded by each gene and incorporates at least one of the ⁇ subunits, is maintained in the state before the substitution or is improved therefrom.
- the means for introducing a mutation is not particularly limited.
- the site other than the mutation sites (a_l), (a-2), (b-1) and (b-2) is the nitrile hydratase As far as it can function as type I of a protein having zease activity, it may have a further mutation by substitution, insertion or deletion of a base.
- Examples of such further mutations include the following. Even when a gene having a certain base sequence is transcribed and translated as type III, the type of host cell into which it is introduced, the components and composition of the nutrient medium used for culture, the temperature during culture, pH, etc. In some cases, the desired enzymatic action is retained, but one or more amino acids near the N-terminus in the sequence listing may be deleted due to modification with host intracellular enzymes after gene expression, etc. However, a variant may be produced in which one or more amino acids are newly added to the N-terminus. Therefore, such atypical nitrile hydratase is also included in the present invention.
- the plasmid for producing nitrile hydrase according to the present invention can be prepared by using the nitrile hydrase gene described above. Specific examples include the following. (P-1) a plasmid having a base sequence encoding the amino acid sequence having the mutation of (a-1) described above;
- (P-2) a plasmid having a base sequence encoding the amino acid sequence having the mutations of (a-1) and (a-2) described above;
- (P-3) a plasmid having a base sequence encoding the amino acid sequence having the mutation of (b-1) described above;
- (P-4) a plasmid having a nucleotide sequence encoding the amino acid sequence having the mutations of (b-1) and (b-2) described above;
- (P-3) A plasmid having a nucleotide sequence encoding the nitrile hydrase of any of (A-1) to (B-4) described above.
- the transformant or cell line according to the present invention is obtained by transforming an arbitrary host cell using this plasmid.
- the method for producing nitrile hydratase of the present invention comprises a step of culturing the above transformant or cell line to produce nitrile hydratase.
- the method for producing an amide compound of the present invention is characterized in that a culture solution, a cell, or a cell-treated product obtained by culturing such a transformant or cell line that produces nitrile hydrase is used in a medium.
- a step of producing a corresponding amide compound by contacting with a tolyl compound is used in detail.
- the nitrile hydratase activity refers to an activity of hydrating a nitrile compound to a corresponding amide compound.
- the enzyme having the activity is characterized by comprising two kinds of polypeptide chains, generally called subunit and j3 subunit, as a component.
- the nitrile hydratase gene is It refers to two amino acid sequences characterized by forming a polypeptide chain or base sequences forming two ORFs (open reading frames) characterized by encoding them.
- a specific example is the nitrile hydrase derived from Pseudonocardia thermofila J CM3095 (see SEQ ID NOs: 98 and 99 in the sequence listing, Patent Document 3, Non-patent Document 4, PDB No .: 1 IRE).
- the key described in SEQ ID NO: 98 in the sequence listing Polypeptide comprising an amino acid sequence and PDB No. 1 The A-chain in the nitrile hydratase three-dimensional structure described in IRE is an ⁇ -subunit, a polypeptide comprising an amino acid sequence described in SEQ ID NO: 99 in the sequence listing, and PDB No.
- the ⁇ chain in the nitrile hydratase three-dimensional structure described in the IRE is the / 3 subunit.
- the ORF consisting of the nucleotide sequence described in SEQ ID NO: 100 in the sequence listing and the ⁇ RF consisting of the nucleotide sequence shown in SEQ ID NO: 101 in the sequence listing are referred to as nitrile hydrase enzyme.
- nucleotide sequence represented by SEQ ID NO: 104 in the sequence listing is obtained.
- the polypeptide consisting of the amino acid sequence encoded by the ORF consisting of the 7th 4th to 13th 5th is composed of the amino acid sequence, consisting of the 1st to the 69th of the nucleotide sequence described in SEQ ID NO: 104 in the sequence listing.
- the polypeptide consisting of the amino acid sequence encoded by the ORF has three subunits.
- the two ORFs encoded by the nucleotide sequence of SEQ ID NO: 104 in the sequence listing are referred to as nitrile hydratase genes.
- the modification method according to the present invention refers to the activity of nitrile hydrase without impairing the original activity of the enzyme, the activity of the enzyme, substrate specificity, Vmax, Km, thermal stability, substrate stability, and product stability.
- This technique aims to change the three-dimensional structure of an enzyme having nitrile hydratase activity before modification with the purpose of changing one or more properties of the sex.
- the region that forms a cavity through which the substrate passes from the outside of the enzyme to the active center or the product passes from the active center to the outside of the enzyme, and Z or ⁇ -subunits involved in dimer formation Identify the region that forms the association interface between the subunits and the interface that participates in the association between the dimers, and specify the region at one or more amino acids in the amino acid sequence corresponding to the amino acid residues present in the region.
- Replacement The method includes a step of making a change such as insertion or deletion.
- a nitrile hydrase derived from J. Donnocardia thermofila JCM3095 see SEQ ID Nos.
- the amino acid residues in the region forming the cavity through which the substrate passes from the outside of the enzyme to the active center or the product passes from the active center to the outside of the enzyme correspond to , PDB number 1
- the second helix ⁇ An amino acid residue that forms a region corresponding to the loop part sandwiched between them, PDB number 1 I Glutamine which is the 89th amino acid residue from the N-terminal in the A chain in the nitrile hydratase three-dimensional structure described in the RE, an amino acid residue corresponding to glutamic acid which is the 165th amino acid residue, and N in the B chain 37th amino acid residue from the end, phenylalanine4th amino acid residue corresponding to leucine, 48th amino acid Amino acid residue containing
- amino acid residues present in the region forming the association interface between the subunit involved in dimer formation and the] 3 subunit and the interface involved in the association between dimers correspond to PDB No. 1 I
- the second helix counted from the N-terminus in the ⁇ chain in the nitrile hydratase three-dimensional structure described in the RE the second helix counted from the N-terminus in the B chain, the amino acid sequence described in SEQ ID NO: 98 in the sequence listing Region from threonine 36 to asparagine 48, amino acid residues corresponding to the region from lysine 112 to leucine 127 in seq. ID No. 99 in the sequence listing, amino acid sequence in seq. No.
- A165E The amino acid residue corresponding to glutamic acid (A165E), which is the 165th amino acid, phenylalanine (B37F), the 37th amino acid from the N-terminal of the B chain, and leucine (B48L), the 48th amino acid
- A165E The amino acid residue corresponding to glutamic acid
- B37F phenylalanine
- B48L the 37th amino acid from the N-terminal of the B chain
- B48L leucine
- the 48th amino acid Identify the four corresponding amino acid residues and set the shortest inter-atomic distance between A165E and B48L to dl, the shortest inter-atomic distance between A89Q and B48L to d2, and the shortest interatomic distance between B37L and B48L
- the distance between heavy atoms is defined as d3
- the shortest distance between A165E and B37F is defined as d4
- the shortest distance between A89Q and B37F is defined as d5.
- one or more of the target nitrile hydrases (such as those derived from Shiudonocardia Thermofila J CM3095 can be cited as representative examples) can be cited above.
- a modification method comprising a step of making a change, such as substitution, insertion or deletion, to an amino acid in the amino acid sequence corresponding to the amino acid residue is included in the present invention.
- nitrile hydra from a species other than Syudonocardia samofila J CM3095 (for example, two torylhydra from serovar Rhodococcus rhodochrous J1-1) was used.
- the three-dimensional structure and amino acid sequence of the conventional nitrile hydratase are aligned, the amino acid residue corresponding to the above amino acid residue is found, and the modification method by changing the amino acid in the corresponding amino acid sequence is also described in the present invention. Included in the invention.
- the means used for alignment based on the three-dimensional structure or amino acid sequence is not particularly limited.
- amino acid sequence alignment include DNAS by Hitachi Software Inc.
- Gene sequence analysis software such as IS ⁇ free software CLUSTALW and BLAST is used as a means for modeling the three-dimensional structure based on the alignment of amino acid sequences. Prediction software is given as an example.
- the amino acid residue corresponding to SEQ ID NO: 104 is the amino acid residue corresponding to the 51st amino acid sequence of the ORF encoded by the ORF consisting of the first to sixth amino acids of the nucleotide sequence described in SEQ ID NO: 104 in the sequence listing: S er. This result is consistent between the alignment based on the amino acid sequence and the alignment based on the stereostructure.
- a modification method by changing one or both of the amino acids in the amino acid sequence corresponding to the two amino acid residues is also included in the present invention.
- the means for introducing a mutation for changing the amino acid in the amino acid sequence corresponding to the amino acid residue is not particularly limited.
- a mutagenesis method in which an amino acid in the sequence is substituted with another amino acid can be cited as an example.
- nitrilyl hydrase before modification to be subjected to the modification method of the present invention examples include nitrilyl hydrase from Rhodococcus rhodochrous J-1 strain 1 and nitrile hydra from Rhodococcus rhodochrous J-1 Nitrile hydra sunset.
- a nitrile hydratase comprising a polypeptide chain formed by an amino acid sequence homologous to the amino acid sequence encoded by the ORF consisting of positions 704 to 1315 of the base sequence described in 104 and a sequence listing A nitrile hydrase comprising a polypeptide chain formed by the amino acid sequence described by SEQ ID NO: 98 and a polypeptide chain formed by the amino acid sequence described by SEQ ID NO: 99 in the sequence listing, Can be mentioned.
- the nitrile hydratase before the modification which is the object of the modification method in the present invention, includes a polypeptide consisting of an amino acid sequence having at least 40% homology with the amino acid sequence described in SEQ ID NO: 98 in the Sequence Listing and the sequence in the Sequence Listing. Also included are nitrile hydrases which comprise the amino acid sequence of No. 99 and a polypeptide consisting of an amino acid sequence showing 25% or more homology as a constituent.
- polypeptide comprising an amino acid sequence having at least 40% homology with the amino acid sequence described in SEQ ID NO: 98 in the Sequence Listing examples include a polypeptide comprising an amino acid sequence described in SEQ ID NO: 98 in the Sequence Listing, A polypeptide comprising an amino acid sequence in which at least one of the amino acid sequences described in SEQ ID NO: 98 has been substituted, inserted, or deleted, and the amino acid sequence described in SEQ ID NO: 98 in the sequence listing has a number of 6, 19, 38 ⁇ 77 ⁇ 90 ⁇ 102 ⁇ 106 ⁇ 126 ⁇ 130 ⁇ 142 ⁇ 146 ⁇ 187 • A polypeptide consisting of an amino acid sequence in which at least one amino acid of amino acids 194-203 has been replaced with another amino acid, SEQ ID NO: 104 in the sequence listing The polypeptide includes an amino acid sequence homologous to the amino acid sequence encoded by the ORF consisting of positions 704 to 1315 of the described base sequence.
- a polypeptide includes
- X 4 X 5 (where C is cysteine, X is serine or threonine, L is leucine, is cysteine sulfinic acid (CYSTEINE SULFINIC ACID-3-SULFINOALANINE), S is serine, and C 2 is cysteine sulfone. It is a polypeptide containing a region represented by phenic acid (CYSTEINE SULFENIC ACID 'S-HYDROXY-CYSTEINE), and ⁇ ⁇ X 2 ⁇ X 3 ⁇ X 4 ⁇ X 5 represents an arbitrary amino acid. It may be.
- ⁇ may be characterized in that it is a polypeptide in which palin, X 4 is tributophan, and X 5 is proline.
- the polypeptide may be characterized in that X 2 is a tyrosine and X 3 is a proline.
- the above case may be characterized by being bonded to a metal atom via a region represented by XCXLCiSCsXsXgXaXs.
- the metal is cobalt.
- Examples of a polypeptide comprising an amino acid sequence having a homology of 25% or more with the amino acid sequence described in SEQ ID NO: 99 in the Sequence Listing include a polypeptide comprising the amino acid sequence described in SEQ ID NO: 99 in the Sequence Listing, A polypeptide comprising an amino acid sequence in which at least one of the amino acid sequences described in SEQ ID NO: 99 has been substituted, inserted, or deleted, and the amino acid sequence described in SEQ ID NO: 99 in the sequence listing has a number of 20, 21 • 108 -A poly'peptide consisting of an amino acid sequence in which at least one of the amino acids at positions 200 to 212 has been replaced with another amino acid, and an ORF consisting of positions 1 to 690 of the nucleotide sequence described in SEQ ID NO: 104 in the sequence listing
- a polypeptide comprising an amino acid sequence homologous to the amino acid sequence to be encoded can be mentioned.
- nitrile hydrazine enzyme derived from Pseudonocardia thermophila J CM3095 is a polypeptide comprising the amino acid sequence of SEQ ID NO: 98 in the sequence listing And a polypeptide comprising the amino acid sequence of SEQ ID NO: 99 in the Sequence Listing, which is a nitrile hydrase which is a target of the modification method of the present invention. It is.
- the constituent elements of a nitrile hydrazyme derived from Shudnocardia samofuira J CM3095 are as follows. Wherein the polypeptide consisting of the amino acid sequence described in SEQ ID NO: 98 in the Sequence Listing is obtained by modifying at least one of the amino acid sequences described in SEQ ID NO: 98 in the Sequence Listing by substitution, insertion or deletion.
- SEQ ID NO: 99 in the sequence listing A polypeptide comprising the amino acid sequence described above, wherein at least one of the amino acid sequences described in SEQ ID NO: 99 in the Sequence Listing is substituted, inserted, or deleted, or a polypeptide comprising the amino acid sequence, or a sequence in the Sequence Listing
- a nitrile hydrase derived from a nitrile hydrase derived from Pseudonocardia thermofila J CM3095 is also included in the unmodified nitrile hydrase which is a target of the modification method of the present invention.
- the modified enzyme refers to nitrile hydrase obtained by performing the modification method on an enzyme having nitrile hydratase activity.
- a modified enzyme characterized by being obtained by changing the character of nitrile hydrase before modification using the above-described modification method can be mentioned as an example.
- Changes in the traits include the substrate characteristics when compared to the unmodified tritrihydrase. PT / JP2003 / 016014
- Relatively less bulky nitrile compounds can be used as substrates.
- Vmax is improved when any nitrile compound is used as a substrate.
- the Km is reduced when using any nitrile compound as a substrate.
- a change in substrate specificity can be cited as one of the representative examples.
- the modified enzyme obtained by the modification method of the present invention has a modified substrate specificity
- the modified enzyme is included in the modified enzyme of the present invention.
- Methods for observing changes in the substrate specificity of the resulting modified enzyme include a method in which a reaction is performed using a plurality of types of nitrile compounds having different bulks as substrates, and the difference in the amount of the corresponding amide compound produced is measured.
- the modified enzyme in which the value of [molar amount of methacrylamide formed] ⁇ [molar amount of acrylamide formed] is increased as compared to the target before the modification is a more bulky nitrile. It can be said that a change in the trait that makes the compound easy to use as a substrate was exhibited, and that the modified enzyme whose value was changed to a smaller value showed a change in the trait that made it easier to use a smaller bulk nitrile compound as a substrate.
- a nitrile hydrazyme derived from Pseudonocardia thermophila JCM3095 and a nitrile hydrazyme derived from the nitrile hydraase derived from Shudnocardia thermophila JCM3095 were used.
- analysis of the steric structure revealed a region that formed a cavity through which the substrate passed from the outside of the enzyme to the active center and the product from the active center to the outside of the enzyme, and / or 2 Identify the region that forms the association interface between the subunits involved in the formation of the dimer and the three subunits, or the interface that participates in the association between the dimers, and determine the amino acid sequence corresponding to the amino acid residues present in the region.
- the modification method including the step of making a change such as substitution, insertion, or deletion at one or more of the amino acids
- acrylonitrile is used as the substrate compared to the target before modification.
- Modified enzyme that the molar ratio of methacrylamide has been changed to produce a Akuriruamido and methacrylic nits Lil formed by the reaction in the reaction of the substrate was obtained. Since this can be said to be a change in the substrate specificity, that is, the trait, the modified enzyme obtained is included in the modified enzyme of the present invention.
- the amino acid encoded by the ORF consisting of the first to sixth amino acids of the nucleotide sequence of SEQ ID NO: 104 in the sequence listing Amino acid residue corresponding to the 48th position of the sequence:
- a bulkier nitrile compound is used as a substrate compared to the target before modification. It showed a change in traits that made it easier. Therefore, the protein showing the acquired trait change is included in the modified enzyme of the present invention.
- a modified enzyme obtained by such a combination of mutation sites is also included in the modified enzyme of the present invention.
- the gene encoding the modifying enzyme is defined as two amino acid sequences characterized by forming two kinds of polypeptide chains constituting the modifying enzyme or two amino acid sequences encoding them. Refers to the base sequence that forms the ORF.
- a plasmid characterized by including a gene is characterized by coding two amino acid sequences characterized by forming two kinds of polypeptide chains constituting a modified enzyme. Include two ORFs in the sequence Refers to a plasmid characterized by:
- the above-mentioned plasmids may be obtained by transforming any host cell, such as a control region necessary for expression of each gene and a region necessary for autonomous replication, in addition to the gene of the present invention, or a transformant or cell strain obtained by the transformation. It is possible to have a configuration that allows production of the modified enzyme.
- the term "optional host cell” refers to, for example, Escherichia coli, as in the examples described below, but is not limited thereto. Bacillus bacteria such as Bacillus subtilis, yeast, actinomycetes, etc. Other microorganisms can also be used.
- Control regions required for expression include a promoter sequence (including an operator sequence that controls transcription), a ribosome binding sequence (SD sequence), a transcription termination sequence, and the like. ,
- promoter sequences include trp promoter of Escherichia coli-derived tributophan operation, 1 ac promoter of lac1 ⁇ 1 supoperon, PL promoter and PR promoter of lambda phage, and Bacillus subtilis. And an alkaline protease promoter (apr), a neutral protease promoter (npr), an ⁇ -amylase promoter (amy), and the like. Also, artificially designed and improved sequences such as tac promoter and trc promoter can be used.
- ribosome binding sequence examples include those derived from Escherichia coli or Bacillus subtilis, or the original sequences of Bacillus dococcus eudonocadia, but are not particularly limited as long as they function in a desired host cell such as Escherichia coli or Bacillus subtilis. Not something.
- a consensus sequence in which a sequence complementary to the 3 ′ terminal region of 16S liposome RNA is continuous for 4 bases or more may be prepared by DNA synthesis and used.
- p-factor independent ones such as the lipoprotein ⁇ ' ⁇ ' tr trp operon ⁇ ⁇ ⁇ ⁇ , etc. can be used.
- control regions on the plasmid is preferably such that the promoter sequence and the ribosome binding sequence are located at the 5'-end upstream of the gene of the present invention, and the transcription termination sequence is three times longer than the gene of the present invention. 'It is desirable to be located downstream of the terminal side.
- nucleotide sequence encoding each ORF constituting the gene of the present invention may be expressed as an independent cistron by such a control region, or the polymorphic sequence may be expressed by a common control region.
- plasmid vectors examples include PBR322, pUC18, pBluescript, pKK223-3, pSClOl, which have autonomously replicable regions in E. coli, PUB110, pTZ4, pC194, ⁇ 11, ⁇ 1, ⁇ 105, etc., which have a region capable of autonomous replication in Bacillus subtilis.
- plasmid vectors capable of autonomous replication in two or more types of host cells include pHV14, TRp7, YEp7, and pBS7.
- nitrile hydratase When the gene of the present invention is expressed to produce nitrile hydratase having a desired activity, a protein involved in the activation of nitrile hydrase may be required.
- the protein involved in the activation of nitrile hydrase is a protein having the property that the presence or absence of the expression of the protein directly influences the activation of nitrile hydratase.
- the protein involved in the activation of nitrile hydrase from the pseudonocardia sammophila described above can be mentioned as an example.
- nitrile hydratase-activating protein a protein composed of a sequence of 144 amino acids shown in the amino acid sequence of SEQ ID NO: 102 can be mentioned as an example.
- a heterologous protein obtained by amino acid substitution, insertion, or deletion in a part of the amino acid sequence of SEQ ID NO: 102 may be a nitrile hydratase as long as it is involved in the activation of nitrile hydrase. Shall be included in the ze-activated protein.
- This atypical protein has mutations due to substitution, insertion or deletion of one or more amino acids in the amino acid sequence of SEQ ID NO: 102, and retains properties involved in activation of nitrile hydrazine enzyme. Things can be mentioned.
- the gene encoding the nitrile hydratase activating protein is not particularly limited as long as it is a gene encoding the nitrile hydrase activating protein. Genes having a nucleotide sequence encoding an amino acid sequence and genes encoding the above-mentioned atypical proteins can be mentioned. Furthermore, the gene encoding this nitrile hydrase activating protein is preferred. A good example is a gene having the nucleotide sequence of SEQ ID NO: 103. Furthermore, the gene encoding the nitrile hydratase activity protein may have a sequence in which one or more base sequences of SEQ ID NO: 103 have been subjected to base substitution, insertion, or deletion. If it functions as a gene encoding nitrile hydrase-activating protein, it shall be included in the range of the gene encoding nitrile hydratase-activating protein.
- ORF When a gene encoding a nitrile hydratase activating protein is used, there may be mentioned an example in which the ORF is included in the plasmid of the present invention together with the two ORFs constituting the gene of the present invention.
- the order of these ORFs on the plasmid is not particularly limited, and three ⁇ RFs may be controlled by the same control region, and two ORFs are controlled by the same control region, and the remaining 1 One ORF may be controlled by a different control region from the other two, and three ORFs may be controlled by different control regions.
- a method of constructing the plasmid of the present invention by inserting the gene of the present invention into such a vector plasmid together with a region necessary for expressing the activity of the modified enzyme of the present invention, and a method of transforming the plasmid into a desired host cell A method for producing nitrile hydrase in the transformant is described in, for example, "Molecular C 1 on ng 3 rd Editi on J (J. Samrook et al .; Cold Spring Harbor. Labo ratory Press, 2001) and the like. General methods and host cells known in the field of molecular biology, biotechnology, and genetic engineering can be used.
- the transformant obtained by the transformation includes those obtained by transforming a host cell using the gene or the plasmid of the present invention.
- An example of culturing the transformant is a method characterized in that the transformant is planted in a culture medium and then grown at an appropriate culture temperature (generally, 20 ° C to 50 ° C). .
- an LB medium, an M9 medium, or the like is generally used as a medium for culturing the above transformant.
- Metal ion may be added to such a medium component.
- the metal ions to be added include Fe ions and Co ions.
- the addition amount is, for example, 0.1 gZmL or more.
- the method for preparing a modified enzyme which comprises a step of recovering the modified enzyme from a culture solution, cells, or a processed product thereof obtained by culturing the transformant, comprises the steps of Examples include a transformant, a culture solution of the transformant, or a characteristic example having a step of recovering nitrile hydratase activity from the transformant—a treated product of the culture solution.
- the method for producing an amide compound which comprises a step of converting a nitrile compound into a corresponding amide compound, comprises the above transformant, a culture solution of the transformant, or the transformant.
- the body a treated product of the culture solution, or an example having a feature of having a step of converting a nitrile compound to a corresponding amide compound using a nitrile hydratase activity recovered by the above-mentioned preparation method as a catalyst. I can do it.
- a desired nitrile conjugate can be prepared by purifying the purified enzyme or crude enzyme.
- the method includes a step of contacting the enzyme preparation, the culture solution of the transformant of the present invention, the transformant obtained from the culture solution, or the processed product of the transformant in a solvent.
- treated product refers to an extract from the transformant, a crushed product, a crude enzyme preparation obtained by separating a ditrihydrhydrase active fraction of these extracts or crushed product, Post-isolated products such as purified enzyme products obtained by purification, the transformants, and the immobilized products obtained by immobilizing extracts, triturated products or post-isolated products of the transformants using appropriate means.
- the temperature for the contact is not particularly limited, but is preferably within a temperature range in which the nitrile hydrase is not inactivated, and is more preferably not lower than the freezing point and not higher than 60 ° C.
- the nitrile compound is not particularly limited as long as the improved enzyme of the present invention can act as a substrate.
- a nitrile compound having 2 to 4 carbon atoms, such as non-hydroxyisobutyronitrile, may be mentioned as an example.
- the concentration of the nitrile compound in the solvent is The reaction temperature is not particularly limited, and the reaction temperature is not particularly limited, but is preferably within a temperature range in which the nitrile hydratase is not inactivated, and is more preferably a freezing point or higher and 50 ° C or lower.
- LB liquid medium 10 mL was prepared in a 3 OmL test tube, and sterilized by autoclaving at 121 ° C for 20 minutes. After ampicillin was added to this medium to a final concentration of 100 g / mL, one loopful of MT-10822 was inoculated and cultured at 37 ° C./300 rpm for about 20 hours. After 1 mL of the culture solution was collected in an appropriate centrifuge tube, the cells were separated by centrifugation (15000 rpm 5 minutes). Subsequently, plasmid pPT-DB1 was prepared from the cells by AlS-USDS extraction.
- the PCR reaction No. 1 was a system with a total amount of 50 iL containing 50 pmo 1 each of the primer described in SEQ ID NO: 7 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) Performed by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- Excess primers and dNTP were removed from each PCR reaction solution using Microcon OO (manufactured by Takara Shuzo), and TE was added to prepare 50 L of each solution.
- 0.5 tL of TaKaRa LA Taq was added to the annealing solution, and heat treatment was performed at 72 ° C. for 3 minutes to complete a heteroduplex.
- PCR reaction No. 3 was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles. . DNA amplification products were analyzed by agarose electrophoresis (using Sigma type VII low melting point agarose; agarose concentration of 0.8% by weight) using 5 ⁇ L of the reaction completion solution of PCR reaction No. 3.
- the conversion and selectivity in the production of the amide compound using the obtained transformant were determined by the following methods.
- the separated cells were resuspended in 5 OmL of physiological saline, and the cells were separated again by centrifugation (5,000 GX 15 minutes).
- 0.1 lg of the cells was suspended in 2 OmL of 50 mM potassium phosphate aqueous solution (pH 7.0), and 1 mL of acrylonitrile or methacrylonitrile was added thereto.
- the reaction was allowed for hours.
- the reaction mixture was analyzed using HP LC.
- the reaction mixture contained a molar amount of the amide compound (acrylamide or acrylamide) corresponding to the nitrile compound (acrylonitrile or methacrylonitrile) added. Only methacrylamide) was present, and no nitrile compound (acrylonitrile or methacrylonitrile) and the corresponding organic acid (acrylic acid or methacrylic acid) were not found. That is, the conversion and selectivity were 100%.
- Plasmids were prepared from the cells by alkaline SDS extraction. Then, use the sequencing kit from ABI and the Auto Sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 1, the sixth Leu of the ⁇ -subunit of nitrile hydrazine was replaced with Met.
- the PCR reaction No. 1 was a 50 / L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 11 in the sequence listing and M4 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 2, the sixth Leu of the ⁇ -subunit of nitrile hydrazine was replaced with Thr.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 12 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazine gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 3, the sixth Leu of the nitrile hydrazine subunit was replaced with A1a.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 13 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 4, the sixth Leu of the nitrile hydrazine subunit was replaced with Va1.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 14 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is the condition described in the kit This was performed by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer 373A. As a result, in the clones shown in Table 5, the 19th A1a of the nitrile hydrasubunit was replaced with Va1.
- the plasmid DNA of pPT-DB1 prepared in Reference Example 1 was 2003/016014
- the PCR reaction No. 1 was a 50 juL total system containing 50 pmo1 each of the primer described in SEQ ID NO: 15 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 6, the 38th met of the nitrile hydrazine subunit was replaced with Leu.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 16 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). The composition was based on the conditions described in the kit), and heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C> 120 seconds) were repeated 25 cycles.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-137A. As a result, in the clones shown in Table 7, Thr at position 77 of the ⁇ -subunit of nitrile hydrazine was replaced with Ser.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 17 in the sequence listing and the Ml3 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- Plasmids were prepared from the cells by alkaline SDS extraction. Then, use the sequencing kit 373 A made by AB I The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 8, the 90th Gy in the nitrile hydrazine subunit was replaced with Ala.
- the PCR reaction No. 1 was a system of 50 jt L containing 50 pmo1 of each of the primer described in SEQ ID NO: 18 in the Sequence Listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the Sequence Listing). Was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a sequencer 373A. As a result, in the clones shown in Table 9, the 102nd Va1 of the nitrile hydratase subunit was replaced with A1a.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primers listed in SEQ ID NO: 19 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- Transformant No. 10 was obtained by the same operation as in Reference Example 1.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a sequencer 373A. As a result, in the clones shown in Table 10, the 106th Va 1 in the nitrile hydratase subunit was replaced with I 1 e.
- the PCR reaction No. 1 was a 50-ml total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 20 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit) and repeated 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-1373A. As a result, in the clones shown in Table 11, the 126th Phe in the nitrile hydrazine subunit was replaced with Tyr.
- PCR reaction No. 1 is as shown in SEQ ID NO: TJP2003 / 016014
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protocol 373A. As a result, in the clones shown in Table 12, the G1n at the 130th position in the subunit of nitrile hydra was replaced with G1u.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 22 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles (according to the conditions described in the kit).
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 13, the 142nd Leu in the nitrile hydratase supplement was replaced with Va1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 23 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is based on the conditions described in the kit), and is repeated by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Continued Then, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and 373A. As a result, in the clones shown in Table 14, G1u at position 146 of the nitrile hydratase subunit was replaced with Asp.
- site-specific mutagenesis was performed in the same manner as in Reference Example 1 using pPT-DII plasmid DNA as type II.
- PCR reaction No. 1 was a 50-L system containing 50 pmo1 of each of the primer described in SEQ ID NO: 24 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 15, the A1a at position 187 of the nitrile hydrazyme subunit was replaced with Thr.
- site-specific mutagenesis was performed in the same manner as in Reference Example 1 using pPT-DB1 plasmid DNA as type III.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 25 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit) by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72.C) for 120 seconds. .
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72.C
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing) were each 50 p.
- the procedure was the same as that for PCR reaction No. 1 in a system with a total amount of 5 including mo 1 (the composition was based on the conditions described in the kit).
- the DNA amplification products were analyzed by agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 juL each of the PCR reaction No. 1 and No. 2 reaction completion solutions, the presence of the amplified DNA products was confirmed. It could be confirmed .
- a transformant No. 16 was obtained by the same operation as in Reference Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and 373A. As a result, in the clones shown in Table 16, the 194th Ser in the subunit of nitrile hydra was replaced with Leu.
- site-specific mutagenesis was carried out in the same manner as in Reference Example 1 using pPT-D—1 plasmid DNA as type I.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer 1 described in SEQ ID NO: 26 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is the condition described in the kit The denaturation was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles. In PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-137A. As a result, in the clones shown in Table 17, the 203rd A1a of the nitrile hydrazine subunit was replaced with G1u.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 27 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and Auto Sequencer-1373A. As a result, in the clones shown in Table 18, the 20th A1a in the ⁇ subunit of nitrile hydrase was converted to Va1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 28 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 19, the Asp at the 21st position of the nitrile hydrazine; 8 subunit was replaced with Asn. [Table 19]
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primers listed in SEQ ID NO: 29 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) The cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, extension reaction (72.C) for 120 seconds is repeated 25 cycles. went. The PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Continued The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 20, the 108th G1u of the 8 subunits of nitrile hydrazine was replaced with Asp.
- the PCR reaction No. 1 was a system of 50 juL in total containing 50 pmo 1 each of the primer described in SEQ ID NO: 30 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) By repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds went. PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 21, the 108th G1u in the iS subunit of nitrile hydrazine was replaced with Pro.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 31 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is based on the conditions described in the kit), and is repeated by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing) were each 50 p.
- the same operation as in PCR reaction No. 1 was performed using a 50-juL system containing mo 1 (the composition was based on the conditions described in the kit).
- the DNA amplification products were analyzed by agarose electrophoresis (agarose concentration: 1.'0% by weight) using 5 juL each of the PCR reaction No. 1 and No. 2 reaction completion solutions, the presence of the amplified DNA products was confirmed. It could be confirmed . Thereafter, a transformant No. 22 was obtained in exactly the same manner as in Reference Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 22, the 108th G1u in the ⁇ subunit of nitrile hydratase was replaced with Ser. '[Table 22]
- Site-specific mutagenesis was performed in the same manner as in Reference Example 1 using the pPT-DB1 plasmid DNA as type III in order to replace the 108th G1u of 8 subunits with Arg.
- PCR reaction No. 1 was a 50-L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 32 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is the condition described in the kit. This was performed by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-1373A. As a result, in the clones shown in Table 23, the G1u at position 108 in the ⁇ subunit of nitrile hydratase was replaced with Arg.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 33 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- PCR reaction No. 2 contains 50 pmo1 of each of MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing). In a 50 L system (the composition was based on the conditions described in the kit), the same operation as in PCR reaction No. 1 was performed.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a 373A sequencing kit. As a result, in the clones shown in Table 24, the 108th G1u in 8 subunits of nitrile hydra was substituted with Cys.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primers listed in SEQ ID NO: 34 in the Sequence Listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the Sequence Listing). The composition is based on the conditions described in the kit.) The cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 cycles. It went by doing. PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using the sequencing kit 373A manufactured by ABI and the sequencing primer 373A. As a result, in the clones shown in Table 25, the G1u at position 108 of the ⁇ subunit of nitrile hydratase was replaced with Leu. [Table 25]
- PCR reaction No. 1 Two types of PCR reactions were performed using 10 ng of the plasmid DNA of pPT-DB1 prepared in Reference Example 1 as each type II.
- the PCR reaction No. 1 was performed in a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 35 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- Plasmids were prepared from the cells by alkaline SDS extraction. Continued The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 26, the 108th G1u of the ⁇ subunit of nitrile hydratase was replaced with Thr.
- site-specific mutagenesis was performed in the same manner as in Reference Example 1 using pPT-DIII plasmid DNA as type III.
- PCR reaction No. 1 was a 50 juL total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 36 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 27, the Ala at position 200 of the nitrile hydrase subunit was replaced with Asp.
- site-specific mutagenesis was performed in the same manner as in Reference Example 1, using pPT-D D1 plasmid DNA as type I.
- the PCR reaction No. 1 was a system (50 juL total) containing 50 pmo1 each of the primer described in SEQ ID NO: 37 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition was based on the conditions described in the kit), and was repeated 25 times under the following conditions: heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer-RV (sequence described in SEQ ID NO: 10 in the sequence listing) were each 50 p.
- the same operation as in PCR reaction No. 1 was performed using a 50-juL system containing mo 1 (the composition was based on the conditions described in the kit).
- Analysis of DNA amplification products by agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 ⁇ L each of PCR reaction Nos. 1 and 2 The existence was confirmed. Thereafter, a transformant No. 28 was obtained in exactly the same manner as in Reference Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 28, the 200th A1a in the subunit of nitrile hydra was replaced with I1e.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 38 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is the condition described in the kit This was performed by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a sequencer 373A. As a result, in the clones shown in Table 29, the A1a at position 200 in the yS subunit of nitrile hydratase was substituted with Va1.
- PCR reaction No. 2 contains 50 pmo 1 each of MUT4 primer (sequence described in SEQ ID NO: 9 in the Sequence Listing) and M13 primer one RV (sequence described in SEQ ID NO: 10 in the Sequence Listing) The procedure was the same as that for PCR reaction No. 1 in a system with a total volume of 5 ⁇ l (the composition was based on the conditions described in the kit).
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a sequencer 373A. As a result, in the clones shown in Table 30, the 200th A1a in the ⁇ subunit of nitrile hydra was replaced with G1u.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in Sequence Listing of Sequence Listing: 40 and the M13 primer M4 (sequence described in SEQ ID NO: 8 in Sequence Listing). The composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazine gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 31, Ser at the 2nd 2nd of the ⁇ subunit (of nitrile hydrazine) was substituted with Tyr. [31]
- 10 ml of LB liquid medium was prepared in a 30 ml test tube, and sterilized by autoclaving at 121 ° C for 20 minutes. After adding ampicillin to this medium to a final concentration of 100 ⁇ gZml, inoculate a platinum loop of the clone No. 11 obtained in Reference Example 11 and incubate at 37 ° C and 300 rpm. Incubated for 20 hours. After the culture solution lm 1 was collected in an appropriate centrifuge tube, the cells were separated by centrifugation (15000 rpm 5 minutes). Subsequently, a plasmid DNA of clone No. 11 was prepared from the cells by an Al-U-SDS extraction method.
- the PCR reaction No. 1 was composed of a total of 501 containing 50 pmo1 each of the primer described in SEQ ID NO: 14 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition was based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds was repeated 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, as shown in Table 32, the 19th A1a of the wild-type nitrile hydra subunit was replaced by Va1 and the 126th Phe of the subunit was replaced by Tyr. .
- plasmid DNA of clone No. 32 was prepared from the cells by alkaline SDS extraction.
- PCR reaction No. 1 was a system having a total amount of 501 containing 50 pmol each of the primer described in SEQ ID NO: 7 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) Performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- PCR reaction No. 2 includes MUT 4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and Ml 3 primer RV
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protein sequencing 373A. As a result, as shown in Table 33, the 6th Leu of the wild-type nitrile hydra subunit is met, the 19th A1a of the subunit is Va1 and the 126th of the subunit is Was replaced by Tyr. [Table 33]
- the PCR reaction No. 1 was a system having a total amount of 501 containing 50 pmo 1 each of the primer described in SEQ ID NO: 11 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) By repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds went.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, as shown in Table 34, the sixth Leu of the ⁇ -subunit of wild-type nitrile hydratase was Thr, the 19th A1a of the subunit was Va1 and the ⁇ -subunit The 126th Ph e of the bird was replaced by Tyr respectively.
- PCR reaction No. 1 is as shown in SEQ ID NO: Heat denaturation was carried out in a system with a total amount of 501 containing 50 pmo1 of each of the primer described in 12 and the M13 primer M4 (sequence is described in SEQ ID NO: 8 in the sequence listing) (the composition is based on the conditions described in the kit) The test was performed by repeating 25 cycles of 15 seconds at 98 ° C), 30 seconds at annealing (55 ° C), and 120 seconds at elongation reaction (72 ° C). PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, as shown in Table 35, the 6th Leu of the wild-type nitrile hydra subunit is A1a, the 19th A1a of the subunit is Va1, and the subunit is The 126th Ph e of the bird was replaced by Tyr respectively.
- PCR reaction No. 1 was a 50/1 total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 29 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition was based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds was repeated 25 cycles.
- PCR reaction No. 2 is MU T4 primer (sequence described in SEQ ID NO: 9 in Sequence Listing) '' and Ml R
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, as shown in Table 36, G1u at position 108 of the S subunit of wild-type nitrile hydratase was substituted with Asp, and Ser at position 212 of the subunit was substituted with Tyr.
- the PCR reaction No. 1 was composed of a total of 501 systems each containing 50 pmo1 of each of the primers listed in SEQ ID NO: 32 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing) The composition was based on the conditions described in the kit), and was repeated 25 times under the following conditions: heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, as shown in Table 37, the 108th G1u of the yS subunit of wild-type nitrile hydrase was replaced with Arg, and the 212th Ser of the ⁇ -supunit was replaced with Tyr. It had been.
- Amino acid mutation of clone No. 27 (; 200th of 8 subunits: A1a is Asp) and amino acid mutation of clone No. 31 (212th of 8 subunits: Ser is Tyr) It was confirmed that the nitrile hydrase activity was maintained in the amino acid substitution product.
- the PCR reaction No. 1 was a system containing 50 pmo 1 each of the primer described in SEQ ID NO: 36 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing) in a total amount of 501 (composition: This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protocol 373A. As a result, as shown in Table 38, the 200th A1a of the S-subunit of wild-type nitrile hydrase was Asp, and the 212th Ser of the ⁇ -subunit was Tyr. Have been replaced respectively.
- the PCR reaction No. 1 was composed of a 50 1 total system containing 50 pmo 1 of each of the primer listed in SEQ ID NO: 39 and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). The composition is based on the conditions described in the kit.) Thermal denaturation (98 ° C) 15 seconds, annealing (55 ° C) 30 seconds, extension reaction (72 ° C) 120 seconds was repeated 25 times.
- the PCR reaction No. 2 was composed of MUT4 primer (sequence is described in SEQ ID NO: 9 in the sequence listing) and M The PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit and an A-137A manufactured by ABI. As a result, as shown in Table 39, the 200th A1a of the wild type nitrile hydratase subunit was G1u, and the 212th Ser of the ⁇ subunit was Tyr. Had been replaced.
- LA PCR invitro mu tagenesis Kit manufactured by Takara Shuzo.
- the “LA PCR invitro mu tagenesis kit” is simply referred to as a kit.
- the key is basically The principles and operation methods of the kit were followed.
- LB liquid medium 10 mL was prepared in a 3 OmL test tube, and sterilized by an autoclave at 121 ° C for 20 minutes. After ampicillin was added to this medium to a final concentration of 100 gZmL, one platinum loop of MT-108'22 was inoculated and cultured at 37 ° C. at 300 rpm for about 20 hours. After 1 mL of the culture solution was collected in an appropriate centrifuge tube, the cells were separated by centrifugation (15000 rpm 5 minutes). Subsequently, a plasmid pPT-DB1 was prepared from the cells by an Al-U-SDS extraction method.
- ⁇ CR reaction ⁇ .1 is a total of 50 / L containing 50 pmo 1 each of the primer described in SEQ ID NO: 41 in the sequence listing and ⁇ 13 primer ⁇ 4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- composition is based on the conditions described in the kit
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- PCR was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles. Reaction No. 3 was performed.
- the DNA amplification product was analyzed by agarose electrophoresis (using Sigma type VII low melting point agarose; agarose concentration of 0.8% by weight) using 5 juL of the reaction end solution of PCR reaction No. 3. The presence of the amplified DNA product of kb was confirmed.
- pPT-DB1 was cut with EcoRI and Hindlll, and subjected to agarose gel electrophoresis (using Sigma type VII low melting point agarose; agarose concentration of 0.7%). Only a 7 Kb DNA fragment was cut out.
- the cut agar mouth pieces (about 0.1 lg) were finely ground, suspended in 1 mL of TE solution, and kept at 55 ° C for 1 hour to completely melt the agarose. This melt was subjected to phenol / mouth opening form extraction and ethanol precipitation to purify the DNA fragment, which was finally dissolved in 10 L of TE.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 40, nitrile hydra C 36 th Th r of Buyunitto it was confirmed that have been replaced in Me t 40] 'Table 40
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer 1 described in SEQ ID NO: 42 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Continued The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 41, it was confirmed that the 71st Arg of the subunit of nitrile hydra was replaced with His.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 43 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 42, it was confirmed that 148th Gy in the nitrile hydratase subunit was substituted with Asp.
- the PCR reaction No. 1 was a 50 / L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 44 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 43, it was confirmed that the 204th V a1 in the nitrile hydrazine subunit was substituted with Arg.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a 373A sequencing kit. As a result, in the clones shown in Table 44, it was confirmed that Lys was substituted for the 204th Va1 in the nitrile hydrase subunit.
- PCR reaction No. 1 Two types of PCR reactions were performed using 10 ng of the plasmid DNA of pPT-DB1 prepared in Example 1 as each type II.
- the PCR reaction No. 1 had a total volume of 50 ⁇ L each containing 50 pmo 1 of the primers listed in SEQ ID NO: 46 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing).
- System The composition is the condition described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 45, it was confirmed that the 204th Va1 in the nitrile hydratase subunit was replaced with Trp.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 47 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 46, it was confirmed that the 204th Va1 of the nitrile hydratase subunit was replaced with Thr.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 48 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazyme gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protein sequencing 373A. As a result, in the clones shown in Table 47, it was confirmed that Thr at the 10th position of the yS subunit of nitrile hydrazine was replaced with Asp.
- the PCR reaction No. 1 was a 50 ⁇ L total system containing 50 mo 1 each of the primer described in SEQ ID NO: 49 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing)
- the composition was based on the conditions described in the kit), and was repeated 25 times under the following conditions: heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 48, it was confirmed that the 10th Thr in ⁇ subunit of nitrile hydra was replaced with G1u. [3 ⁇ 448] Table 48
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 50 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is based on the conditions described in the kit), 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, extension reaction (72 ° C) for 120 seconds Performed by repeating.
- Plasmids were prepared from the cells by alkaline SDS extraction. Then use the ABI Sequencing Kit and Auto Sequencer 373 A The nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method. As a result, in the clones shown in Table 49, it was confirmed that Thr at the 10th position of the nitrile hydratase subunit was replaced with Trp.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 51 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazyme gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-1373A. As a result, in the clones shown in Table 50, it was confirmed that the 10th Thr in the ⁇ subunit of nitrile hydratase was replaced with G1y.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 52 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit 373A manufactured by ABI and a sequencer 373A. As a result, in the clones shown in Table 51, it was confirmed that the 10th Thr in the subunit of nitrile hydra was replaced with Tyr.
- the pPT-DB1 plasmid DNA was used as type I, and the mutation specific to position 15 was introduced in the same manner as in Example 1.
- the PCR reaction No. 1 was a 50-L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 53 in the sequence listing and the Ml3 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of thermal denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles. .
- thermal denaturation 98 ° C
- annealing 55 ° C
- elongation reaction 72 ° C
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protocol 373A. As a result, in the clones shown in Table 52, it was confirmed that the 10th Thr of the S subunit of nitrile hydrazine was replaced with Cys.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 54 in the Sequence Listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the Sequence Listing). Is based on the conditions described in the kit), heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, The test was performed by repeating the conditions of the reaction (72 ° C) for 120 seconds for 25 cycles.
- PCR reaction No. 1 contained 50 pmo1 each of the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing).
- the same operation as in PCR reaction No. 1 was performed using the juL system (the composition was based on the conditions described in the kit).
- the PCR products No. 1 and No. 2 were analyzed for DNA amplification products by agarose gel electrophoresis (agarose concentration: 1.0% by weight) using 5 juL of each end solution. The existence of was confirmed. Thereafter, a transformant No. 53 was obtained in exactly the same manner as in Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using the sequencing kit 373A manufactured by ABI and the sequencing primer 373A. As a result, in the clones shown in Table 53, it was confirmed that the 32nd Va1 in the ⁇ subunit of nitrile hydra was replaced with G1y.
- PCR reaction No. 1 is as shown in SEQ ID NO:
- the primers described in 55 and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing) were each 50 L in total containing 50 pmo1 (the composition was based on the conditions described in the kit). This was performed by repeating the conditions of 15 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 54, it was confirmed that Thr at position 37 of the yS subunit of nitrile hydratase was replaced with Thr.
- the pPT-DB1 plasmid DNA was used as type II, and the site-specific modification was performed in the same manner as in Example 1. Different introduction was performed.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 56 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer 1 described in SEQ ID NO: 57 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) Repeat the cycle of 15 cycles of heat denaturation (98 ° C), 30 seconds of annealing (55 ° C), and 120 seconds of elongation reaction (72 ° C) for 25 cycles. Was performed. In PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 56, it was confirmed that 37th Phe of 8 subunits of nitrile hydra was substituted with Leu. 56] Table 56
- the PCR reaction No. 1 was a 50 / L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 58 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- Plasmids were prepared from the cells by alkaline SDS extraction. Next, use the ABI Sequencing Kit and Auto Sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 57, it was confirmed that the 37th Phe of the ⁇ subunit of nitrile hydrase was replaced with I1e.
- the PCR reaction No. 1 was composed of a 50-L total system containing 50 pmo1 each of the primers listed in SEQ ID NO: 59 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing). The composition is based on the conditions described in the kit) . The cycle of thermal denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 cycles. went. PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a kit of 373A. As a result, it was confirmed that in the clones shown in Table 58, Ph 37 at the y8 subunit of nitrile hydratase was substituted with Va1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primers listed in SEQ ID NO: 60 in the sequence listing and the M13 primer M4 (sequence listing in the sequence listing &).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 times.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 59, it was confirmed that the 41st Phe of) 8 subunit of nitrile hydra was substituted with G1u.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primers listed in SEQ ID NO: 61 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) By repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds went. In PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 60, it was confirmed that the 41st Ph e ′ of the; 3 subunit of nitrile hydratase was substituted with Thr.
- the plasmid DNA of pPT-DB1 prepared in Example 1 was used as each type II, and two types of PCR reactions were performed.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primers listed in SEQ ID NO: 62 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing).
- the composition depends on the conditions described in the kit), heat denaturation (98 ° C) 15 seconds, annealing (55 ° C) 30 seconds, Four
- PCR reaction No. 2 contained 50 pmo1 each of the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing).
- ⁇ Performed in the same manner as in PCR reaction No. 1 using the iL system (composition is based on the conditions described in the kit).
- Analysis of DNA amplification products by agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 juL each of PCR reaction No. 1 and No. 2 reaction completion solution revealed the presence of amplified DNA products. Was confirmed. Thereafter, a transformant No. 61 was obtained by the same operation as in Example 1.
- PCR reaction No. 1 is as shown in SEQ ID NO: Heat denaturation was carried out in a 50-L system (containing the composition described in the kit) containing 50 pmo1 each of the primer described in 63 and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). The test was performed by repeating 25 cycles of 15 seconds at 98 ° C), 30 seconds at annealing (55 ° C), and 120 seconds at elongation reaction (72 ° C). PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 62, it was confirmed that the 41st Phe of the nitrile hydratase subunit was replaced with Leu.
- the pPT-DB1 plasmid DNA was used as type II, and the site-specific modification was performed in the same manner as in Example 1. Different introduction was performed. ⁇ 'Two types of PCR reactions were performed using each of the PPT-DB1 plasmid DNA1 Ong prepared in Example 1 as type II.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 6 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the PCR reaction No. 2 contains 50 pmo1 of each of the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing).
- the procedure was the same as in PCR reaction No. 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and 373A. As a result, in the clones shown in Table 63, it was confirmed that the 41st ⁇ e of the ⁇ subunit of nitrile hydra-yucase was replaced by I1e.
- PCR reaction No. 1 was a 50-L system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 65 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 64, it was confirmed that the 41st Ph in S subunit of nitrile hydra was replaced with Va1. [Table 64] Table 64
- ⁇ Reaction 1 ⁇ 0.1 is a 50 L total system containing 50 pmo 1 each of the primer 1 described in SEQ ID NO: 66 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). (The composition is based on the conditions described in the kit.) By repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds went. PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Next, use an ABI Sequencing Kit and an Auto Sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 65, it was confirmed that the 46th met in ⁇ subunit of nitrile hydratase was substituted with Gy.
- site-specific mutagenesis was carried out by the same procedure as in Example 1 using pPT-DB1 plasmid DNA as type III.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 67 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 67 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazine gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-137A. As a result, in the clones shown in Table 66, it was confirmed that the 46th met in the S subunit of nitrile hydratase was replaced with Tyr.
- PCR reaction No. 1 Two types of PCR reactions were performed using 1 ng of the plasmid DNA of PPT-DB1 prepared in Example 1 as each type II.
- the PCR reaction No. 1 was carried out in a total volume of 50 L containing 50 pmo1 each of the primer described in SEQ ID NO: 68 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- Thermal denaturation 98 ° C
- annealing 55 ° C
- elongation reaction 72 ° C) for 120 seconds in the system (composition is based on the conditions described in the kit) was repeated 25 times.
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the Sequence Listing) and the M13 primer RV (sequence described in SEQ ID NO: 10 in the Sequence Listing) were each 50 pmo 1
- the reaction was performed in the same manner as in PCR reaction No. 1 with a total amount of 5 ⁇ iL (including the composition described in the kit). Perform agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 L each of PCR reaction No. 1 and No. 2 reaction completion solution. Further analysis of the DNA amplification product confirmed the presence of the amplified DNA product. Thereafter, a transformant No. 67 was obtained by the same operation as in Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 67, it was confirmed that the 46th met in the 3-subunit of nitrile hydratase was replaced by Leu.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 69 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This was performed by repeating the conditions of thermal denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds for 25 cycles. .
- thermal denaturation 98 ° C
- annealing 55 ° C
- elongation reaction 72 ° C
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the Ml3 primer RV (sequence described in SEQ ID NO: 10 in the sequence listing) were each 50 p.
- the same operation as in PCR reaction No. 1 was performed using a 50-L system containing mo 1 (composition is based on the conditions described in the kit).
- the DNA amplification products were analyzed by agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 jt L each of the PCR reaction No. 1 and No. 2 reaction completion solution, the presence of the amplified DNA products was confirmed. It could be confirmed .
- a transformant No. 68 was obtained in exactly the same manner as in Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 68, it was confirmed that Lys was substituted for 46th met in the nitrile hydratase subunit.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 70 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Heat denaturation (98 ° C) 15 seconds, annealing (55.C) 30 seconds, elongation The test was performed by repeating the conditions of the reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 69, it was confirmed that the 46th met in the j8 subunit of nitrile hydratase was replaced with Asp.
- PCR reaction No. 1 is as shown in SEQ ID NO: A heat-denaturing system (50 L in total, containing 50 pmo 1 each of the primers described in 71 and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing)) (the composition is based on the conditions described in the kit) was used. The test was performed by repeating 25 cycles of 15 seconds at 98 ° C), 30 seconds at annealing (55 ° C), and 120 seconds at elongation reaction (72 ° C). PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazine gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 70, it was confirmed that the Leu at position 48 of the nitrile hydra subunit was replaced with Gy.
- the plasmid DNA of PPT-DB1 prepared in Example 1 was used as type II, and two types of PCR reactions were performed.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 72 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 72 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and 373A. As a result, in the clones shown in Table 71, it was confirmed that the 48th Leu in the nitrile hydrase subunit was replaced with A1a.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 73 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-1373A. As a result, in the clones shown in Table 72, it was confirmed that the 48th Leu of nitrile hydratase; 3 subunit was replaced with Va1. . [Table.72] Table 72
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 74 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing) This was performed by repeating the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles under the conditions described in the kit.
- Plasmids were prepared from the cells by alkaline SDS extraction. Then, use a sequencing kit manufactured by ABI and an auto sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 73, it was confirmed that the 48th Leu in the subunit of nitrile hydrase was replaced with Ser.
- the pPT-DB1 plasmid DNA was used as type III, and site-specific mutagenesis was carried out in the same manner as in Example 1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer 1 described in SEQ ID NO: 75 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated for 25 cycles. went.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and Auto Sequencer-1373A. As a result, in the clones shown in Table 74, it was confirmed that the 48th Leu in the nitrile hydrase subunit was replaced with Thr.
- the PCR reaction No. 1 was a system of 50 juL in total containing 50 pmo 1 each of the primer 1 described in SEQ ID NO: 76 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition was based on the conditions described in the kit), and was repeated 25 times under the following conditions: heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and Auto Sequencer-1373A. As a result, in the clones shown in Table 75, it was confirmed that the 48th Leu of the; 8 subunit of nitrile hydrase was substituted with Arg.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 77 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Is based on the conditions described in the kit '), and repeated 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the Diodekin method using a sequencing kit manufactured by ABI and a 373A autosequencer. As a result, in the clones shown in Table 76, it was confirmed that Phe at position 51 of the nitrile hydratase; 8 subunits was replaced with Ala.
- the pPT-DB1 plasmid DNA was used as type III, and site-specific mutagenesis was carried out in the same manner as in Example 1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 78 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Heat denaturation (98 ° C) 15 seconds, annealing (55 ° C) 30 seconds, The test was performed by repeating the conditions of the reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using the sequencing kit ABI 373A and the protocol 373A. As a result, in the clones shown in Table 77, it was confirmed that the 51st Phe of S-subunit (of nitrile hydra) was substituted with Va1.
- the PCR reaction No. 1 is represented by SEQ ID NO: Thermal denaturation in a system with a total volume of 50 L containing 50 pmo1 each of the primer described in 79 and the M13 primer M (sequence number is shown in SEQ ID NO: 8 in the sequence listing) (the composition is based on the conditions described in the kit) (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds were repeated for 25 cycles.
- SEQ ID NO: 8 the composition is based on the conditions described in the kit
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-1373A. As a result, in the clones shown in Table 78, it was confirmed that the 72nd T rp of the jS subunit of nitrile hydrazine was replaced with P he.
- the pPT-DB1 plasmid DNA was used as type III, and site-specific by the same procedure as in Example 1. Mutagenesis was performed.
- the PCR reaction No. 1 was a system of 50 juL in total containing 50 pmo 1 each of the primer described in SEQ ID NO: 80 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 79, it was confirmed that the 118th Phe of the j8 subunit of nitrile hydratase was substituted with A1a.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 81 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and is repeated by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds.
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and a protocol 373A. As a result, in the clones shown in Table 80, it was confirmed that the 118th Ph of the S subunit of nitrile hydratase was substituted with Leu. [Table 80] Table 80
- PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 each of the primer described in SEQ ID NO: 82 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). 25 cycles of thermal denaturation (98 ° C) for 15 seconds, ⁇ -ring (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. It was done by doing. PCR reaction No.
- Plasmids were prepared from the cells by alkaline SDS extraction. Next, use a sequencing kit made by ABI and an auto sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 81, it was confirmed that the 118th Phe of the; 3 subunit of nitrile hydra was replaced by I1e.
- site-specific mutagenesis was performed by the same operation as in Example 1 using pPT-DB1 plasmid DNA as type III.
- PCR reaction No. 1 was a 50 L total system containing 50 pmo1 each of the primer described in SEQ ID NO: 83 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 82, it was confirmed that the 118th Phe of the nitrile hydraidase; 8 subunits was replaced with Va1.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 84 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, it was confirmed that in the clones shown in Table 83, Leu at position 127 of the ⁇ subunit (of nitrile hydratase) was substituted with A1a.
- the PCR reaction No. 1 was a 50 / L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 85 of the sequence column and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit), by repeating 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and elongation reaction (72 ° C) for 120 seconds. .
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 84, it was confirmed that 127th Leu of nitrile hydratase (subunit 3) was substituted with Va1.
- the PCR reaction No. 1 was composed of a 50 juL total system containing 50 pmo1 each of the primer described in SEQ ID NO: 86 in the sequence listing and M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). The composition depends on the conditions described in the kit), heat denaturation (98 ° C) 15 seconds, annealing (55 ° C) 30 seconds, The test was performed by repeating the conditions of the reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 85, it was confirmed that the 127th Leu of ⁇ -unit of nitrile hydratase was replaced with Ser.
- PCR reaction No. 1 is as shown in SEQ ID NO:
- the primers described in 87 and the M13 primer M4 (sequence number is shown in SEQ ID NO: 8 in the sequence listing) each containing 50 pmo1 in a total amount of 50 juL (the composition is based on the conditions described in the kit) were used.
- the denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds were repeated 25 times.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrazine gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, it was confirmed that in the clones shown in Table 86, Arg at position 146 of ⁇ subunit of nitrile hydratase was substituted with Gy.
- the PCR reaction No. 1 was a 50 ⁇ L total system containing 50 pmo 1 of each of the primer described in SEQ ID NO: 88 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). This is performed under the conditions described in the kit) by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles. I got it. PCR reaction No.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 87, it was confirmed that Arg at position 160 of 8 subunits of nitrile hydratase was replaced with Leu.
- the PCR reaction No. 1 was composed of a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 89 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- heat denaturation 98 ° C
- annealing 55 ° C
- extension reaction 72 ° C
- Plasmids were prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, it was confirmed that in the clones shown in Table 88, Arg at position 160 of the; 3 subunit of nitrile hydratase was substituted with Trp. [Table 88] Table 88
- the PCR reaction No. 1 was a system of 50 juL in total containing 50 pmo1 each of the primer described in SEQ ID NO: 90 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing).
- the composition was based on the conditions described in the kit), and was repeated 25 times under the following conditions: heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- Plasmids were prepared from the cells by alkaline SDS extraction. Then, use the sequencing kit from ABI and the Auto Sequencer 373A. The nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method. As a result, in the clones shown in Table 89, it was confirmed that Leu at position 186 of (8) supunit of nitrile hydratase was substituted with G1u.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 each of the primers listed in SEQ ID NO: 91 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing).
- the composition is based on the conditions described in the kit), and the cycle of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds is repeated for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene portion was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, in the clones shown in Table 9, it was confirmed that Lep at position 186 of the y8 subunit of nitrile hydratase was substituted with Asp.
- the PCR reaction No. 1 was composed of a 50 L total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 92 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed by repeating the conditions of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydratase gene was determined by the dideoxy method using a sequencing kit manufactured by ABI and an autosequencer-373A. As a result, it was confirmed that in the clones shown in Table 91, Leu at position 186 of ⁇ subunit of nitrile hydratase was replaced with Lys.
- the PCR reaction No. 1 was a 50-liter total system containing 50 pmo1 of each of the primer described in SEQ ID NO: 93 in the sequence listing and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing). Was performed under the conditions described in the kit) and repeated 25 cycles of heat denaturation (98 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds. .
- the MUT4 primer (sequence described in SEQ ID NO: 9 in the sequence listing) and the M13 primer-RV (sequence described in SEQ ID NO: 10 in the sequence listing) were each 50 p.
- the system was performed in the same manner as in PCR reaction No. 1 using a system with a total amount of 50; t / L containing mo 1 (the composition was based on the conditions described in the kit).
- Analysis of DNA amplification products by agarose electrophoresis (agarose concentration: 1.0% by weight) using 5 juL each of PCR reaction No. 1 and No. 2 reaction completion solution confirmed the presence of amplified DNA products did it .
- a transformant No. 92 was obtained in exactly the same manner as in Example 1.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene portion was determined by the dideoxy method using a sequencing kit from ABI and an autosequencer 373A. As a result, in the clones shown in Table 92, it was confirmed that Leu at position 186 of 8 subunits of nitrile hydratase was substituted with Arg.
- the PCR reaction No. 1 was a 50 L total system containing 50 pmo 1 each of the primers listed in SEQ ID NO: 94 in the sequence listing and the M13 primer M4 (sequence listed in SEQ ID NO: 8 in the sequence listing). (The composition depends on the conditions described in the kit.) Thermal denaturation (98 ° C) 15 seconds, annealing (55 ° C) 30 seconds, elongation The test was performed by repeating the conditions of the reaction (72 ° C) for 120 seconds for 25 cycles.
- a plasmid was prepared from the cells by alkaline SDS extraction. Subsequently, the nucleotide sequence of the nitrile hydrase gene was determined by the dideoxy method using a sequencing kit 373A from ABI. As a result, in the clones shown in Table 93, it was confirmed that the 186th Leu in ⁇ subunit of nitrile hydra was replaced with Asn.
- PCR reaction No. 1 is as shown in SEQ ID NO: Heat denaturation (98%) was carried out in a 50 L total system containing 50 pmo1 of each of the primers described in 95 and the M13 primer M4 (sequence described in SEQ ID NO: 8 in the sequence listing) (the composition was based on the conditions described in the kit). This was performed by repeating the conditions of 15 ° C) for 15 seconds, annealing (55 ° C) for 30 seconds, and extension reaction (72 ° C) for 120 seconds for 25 cycles.
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AU2003289338A AU2003289338A1 (en) | 2002-12-19 | 2003-12-15 | Novel nitrile hydratase |
EP03780752.6A EP1586637B1 (en) | 2002-12-19 | 2003-12-15 | Novel nitrile hydratase |
US10/539,560 US7595184B2 (en) | 2002-12-19 | 2003-12-15 | Nitrile hydratase variant |
AU2010202683A AU2010202683B2 (en) | 2002-12-19 | 2010-06-28 | Novel nitrile hydratase |
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JP2002368360A JP2004194588A (ja) | 2002-12-19 | 2002-12-19 | 新規なニトリルヒドラターゼ |
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JP2003-379280 | 2003-11-10 | ||
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US (1) | US7595184B2 (ja) |
EP (1) | EP1586637B1 (ja) |
JP (1) | JP2004194588A (ja) |
KR (5) | KR100785549B1 (ja) |
CN (4) | CN1729288A (ja) |
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Cited By (10)
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WO2005116206A1 (ja) * | 2004-05-26 | 2005-12-08 | Mitsubishi Rayon Co., Ltd. | 改良型ニトリルヒドラターゼ |
EP1842907A1 (en) | 2006-04-07 | 2007-10-10 | B.R.A.I.N. Ag | A group of novel enantioselective microbial nitrile hydratases with broad substrate specificity |
JP2008253182A (ja) * | 2007-04-04 | 2008-10-23 | Mitsubishi Rayon Co Ltd | 改良型ニトリルヒドラターゼ |
WO2010055666A1 (ja) | 2008-11-14 | 2010-05-20 | 三井化学株式会社 | ニトリルヒドラターゼ変異体 |
JP2010172295A (ja) * | 2009-01-30 | 2010-08-12 | Mitsubishi Rayon Co Ltd | 改良型ニトリルヒドラターゼ及びその製造方法 |
WO2012164933A1 (ja) | 2011-05-31 | 2012-12-06 | ダイヤニトリックス株式会社 | 改良型ニトリルヒドラターゼ |
WO2012169203A1 (ja) | 2011-06-07 | 2012-12-13 | ダイヤニトリックス株式会社 | 改良型ニトリルヒドラターゼ |
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WO2024004661A1 (ja) * | 2022-06-30 | 2024-01-04 | 三井化学株式会社 | 変異型ニトリルヒドラターゼ、該変異型ニトリルヒドラターゼをコードする核酸、該核酸を含むベクター及び形質転換体、該変異型ニトリルヒドラターゼの製造方法、並びにアミド化合物の製造方法 |
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JPH0856684A (ja) | 1994-08-16 | 1996-03-05 | Mitsui Toatsu Chem Inc | 微生物によるアミド化合物の製造法 |
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- 2002-12-19 JP JP2002368360A patent/JP2004194588A/ja active Pending
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- 2003-12-15 KR KR1020067026865A patent/KR100785549B1/ko active IP Right Grant
- 2003-12-15 KR KR1020067026866A patent/KR100785548B1/ko active IP Right Grant
- 2003-12-15 KR KR1020077015994A patent/KR100794001B1/ko active IP Right Grant
- 2003-12-15 US US10/539,560 patent/US7595184B2/en active Active
- 2003-12-15 CN CNA2003801069930A patent/CN1729288A/zh active Pending
- 2003-12-15 CN CN2012105742761A patent/CN103103175A/zh active Pending
- 2003-12-15 AU AU2003289338A patent/AU2003289338A1/en not_active Abandoned
- 2003-12-15 EP EP03780752.6A patent/EP1586637B1/en not_active Expired - Lifetime
- 2003-12-15 WO PCT/JP2003/016014 patent/WO2004056990A1/ja active Application Filing
- 2003-12-15 KR KR1020057011335A patent/KR100825147B1/ko active IP Right Grant
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US9738885B2 (en) | 2011-06-07 | 2017-08-22 | Mitsubishi Chemical Corporation | Nitrile hydratase |
US10487320B2 (en) | 2011-06-07 | 2019-11-26 | Mitsubishi Chemical Corporation | Nitrile hydratase |
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US10093912B2 (en) | 2014-06-06 | 2018-10-09 | Mitsubishi Chemical Corporation | Nitrile hydratase |
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US11098299B2 (en) | 2016-12-28 | 2021-08-24 | Mitsui Chemicals, Inc. | Mutant nitrile hydratase, nucleic acid coding said mutant nitrile hydratase, expression vector and transformant including said nucleic acid, production method for said mutant nitrile hydratase, and production method for amide compound |
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Also Published As
Publication number | Publication date |
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KR100819228B1 (ko) | 2008-04-03 |
KR20070007393A (ko) | 2007-01-15 |
CN1729288A (zh) | 2006-02-01 |
KR20070011620A (ko) | 2007-01-24 |
EP1586637A1 (en) | 2005-10-19 |
JP2004194588A (ja) | 2004-07-15 |
AU2010202683A1 (en) | 2010-07-15 |
AU2010202683B2 (en) | 2012-01-19 |
EP1586637A4 (en) | 2008-03-19 |
KR100785549B1 (ko) | 2007-12-12 |
KR100785548B1 (ko) | 2007-12-12 |
CN103103175A (zh) | 2013-05-15 |
CN103215242A (zh) | 2013-07-24 |
KR100825147B1 (ko) | 2008-04-24 |
EP1586637B1 (en) | 2014-02-26 |
KR20070087054A (ko) | 2007-08-27 |
US20070009985A1 (en) | 2007-01-11 |
US7595184B2 (en) | 2009-09-29 |
CN101892211A (zh) | 2010-11-24 |
AU2003289338A1 (en) | 2004-07-14 |
KR20050089972A (ko) | 2005-09-09 |
KR100794001B1 (ko) | 2008-01-10 |
KR20070110146A (ko) | 2007-11-15 |
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