WO2004055179A1 - D−アミノアシラーゼ - Google Patents
D−アミノアシラーゼ Download PDFInfo
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- WO2004055179A1 WO2004055179A1 PCT/JP2003/016182 JP0316182W WO2004055179A1 WO 2004055179 A1 WO2004055179 A1 WO 2004055179A1 JP 0316182 W JP0316182 W JP 0316182W WO 2004055179 A1 WO2004055179 A1 WO 2004055179A1
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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
- C12N9/14—Hydrolases (3)
- C12N9/78—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5)
- C12N9/80—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5) acting on amide bonds in linear amides (3.5.1)
Definitions
- the present invention relates to a novel bacterium produced from a bacterium belonging to the genus Defluvibacter.
- the present invention relates to D-aminoacylase and a method for producing D-amino acids used in pharmaceuticals, chemicals and the like using the D-aminoacylase.
- D-amino acid is effective as a raw material for pharmaceuticals and the like, and it has become an important industrial issue to produce D-amino acids with high optical purity at low cost.
- a method of resolving a chemically synthesized racemate is used as this method, and an enzymatic method that does not generate by-products or a large amount of waste solvent is currently attracting attention.
- Pseudomonas sp. Pseudomonas sp. AAA620 for example, Chemical and Pharmaceutical 1 Bull et in (USA), 1978, Vol. 26, p2698
- Streptomyces olivaceus S.62 strain for example, Japanese Patent Application Laid-Open No. 53-59092
- A-6 strains for example, JP-A-2-234677
- D-aminoacylase derived from these microorganisms has been reported.
- the present invention has found from the natural world a novel microorganism which produces D-aminoacylase having a high activity against N-acetyl-D-amino acid, which has a low reactivity with previously reported enzymes, To provide a novel method for producing D-aminoacylase for inexpensively producing D-aminoacylase, and a method for producing D-amino acid using the novel D-aminoacylase. Another object of the present invention is to provide a microorganism that produces the novel D-aminoacylase.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have the ability to produce a novel D-aminoacylase that works well with substrates having low reactivity with conventional enzymes.
- Bacteria belonging to the genus Def luvibacter have been found in nature, and the present invention has been completed based on this finding.
- the present invention provides a D-aminoacylase having the following enzymatic properties.
- Isoelectric point Denaturing system Measured by two-dimensional electrophoresis, showing an isoelectric point of 5.3.
- Substrate specificity It acts on N-acetyl-D-amino acids, especially on N-acetyl-D-parin, but not on N-acetyl-L-amino acid.
- N-acetyl-D-valine N-acetyl-D-leucine, N-acetyl-D-methionine, N-acetyl-D-tryptophan, N-acetyl-D-phenylalanine, and N-acetyl-D-tyrosine as substrates N-Acetyl-L-Valin, N-Acetyl-L-Min, N-Acetyl-L-methionine, N-Acetyl-L-triptophan, N-Acetyl-L-Fenilalanine, N-Acetyl-L-Tyrosine Does not work.
- the present invention also provides a D-aminoacylase comprising the protein described in any of the following (a) or (b) and a gene encoding the D-aminoacylase.
- the present invention relates to a microorganism belonging to the genus Denuvibacter which produces a D-aminoacylase that efficiently converts N-acetyl-D, L-amino acid or N-acetyl-D-amino acid to D-amino acid. To provide.
- the present invention also provides a method for producing D-aminoacylase, which comprises culturing the microorganism and collecting the D-aminoacylase from the culture.
- the present invention also provides a method for producing a D-amino acid, wherein the D-aminoacylase is allowed to act on N-acetyl-D, L-amino acid or N-acetyl-D-amino acid.
- a novel D-aminoacylase obtained from a microorganism belonging to the genus Defluvibacter has a high substrate specificity, for example, N-acetyl-D, L-valine, N-acetyl-D, L-yl.
- Simple and efficient D-amino acids can be obtained from methionine, N-acetyl-D, L-tryptophan, N-acetyl-D, L-leucine, N-acetyl-D, L-phenylalanine, N-acetyl-D, L-tyrosine, etc. It can be manufactured at low cost.
- FIG. 1 is a diagram showing an electrophoresis image of the present enzyme when measuring the molecular weight by electrophoresis.
- FIG. 2 is a diagram showing the residual activity of the present enzyme when measuring the temperature stability.
- FIG. 3 is a diagram showing the relative activity of the present enzyme when measuring the optimum temperature.
- FIG. 4 is a diagram showing the residual activity of the present enzyme when measuring the pH stability.
- FIG. 5 is a diagram showing the relative activity of the present enzyme at the time of measuring the optimum pH.
- FIG. 6 is a diagram showing the division ratio of N-acetyl-D and L-valine.
- the present invention finds a microorganism having the ability to produce a novel D-aminoacylase in nature, clarifies various properties of the novel D-aminoacylase and its gene, and demonstrates that it is effective in producing D-amino acids. It was established by clarification.
- the microorganism producing the novel D-aminoacylase of the present invention is not particularly limited as long as it produces the above-described D-aminoacylase of the present invention.
- An example of a bacterium is Defulvipactor isolated from the soil at the Daiichi Kagaku Kagaku Co., Ltd., Iwate Plant.
- a microorganism belonging to the genus for example, Defluvibacter sp. A131-3 (Defluvibacter sp. A131-3).
- the A131-13 strain has the following bacteriological properties.
- the fatty acid composition was measured using a gas chromatography system HP 6890 (Hewlett-I Packard, CA, USA), and the bacterial species data was collated using the Sherock Microbial Identification System (MIDI, DE, USA). Used TSBA (Version 4.0) of MIS Standard Libraries (MIDI, DE, USA).
- a homology search was performed on the DNA base sequence database (GenBank) using BLAST.
- microorganisms newly discovered in nature were classified as bacteria belonging to the genus Defluvibacter, but microorganisms having similar properties were classified as those belonging to the genus Deiluvibacter.
- the Defluvibacter lusatiensis DSM11099 has been reported (Def luvibacter lusatiae gen. nov., sp. nov., a new chloropheno degrading member of the — 2 subgroup of proteobacteria. Syst. Appl. Microbiol., 1999, 22, 197-204.).
- a bacterium belonging to the genus Defluvibacta for example, a strain of Defluvibacter 'Espi-A131-3 (Defluvibacter sp. It is also possible to use recombinants obtained by methods that improve the productivity and properties of known general enzymes, such as mutagenesis and mutation, or recombinant DNA manipulation, and their mutants and improved strains It is.
- novel D-aminoacylase of the present invention can be obtained by inoculating the microorganism into an appropriate medium and culturing it.
- the medium used here is not particularly limited as long as it is used as a medium for ordinary microorganisms and is capable of growing the microorganisms and producing new D-aminoacylase. It is preferable to contain an appropriate amount of a nitrogen source, a carbon source, and an inorganic salt that can be converted.
- the nitrogen source, carbon source, and inorganic salts are not particularly limited.
- meat extract for example, as a nitrogen source, meat extract, yeast extract, peptone and the like can be mentioned.
- carbon sources include glucose, fructose, sucrose, glycerin, and acetic acid.
- inorganic salts include disodium hydrogen phosphate, potassium dihydrogen phosphate, magnesium sulfate, ammonium nitrate, iron sulfate, and zinc sulfate.
- Induction of D-aminoacylase of the present invention does not require an inducer or the like, but N-acetyl-D monoamino acid or N-acetyl-D, It is desirable to add about 0.01 to 0.5% by weight (hereinafter simply referred to as "%") of an acylated amino acid derivative such as L-amino acid in the medium.
- % an acylated amino acid derivative such as L-amino acid in the medium.
- N-acetyl-D-valine, N- Acetyl-D-leucine is an effective inducer.
- the pH of the medium may be any pH range as long as the bacteria can grow, but is preferably about 7 to 9, and the culture temperature is 15 to 40 ° C, more preferably 25 to 37 °. C.
- the culturing time is preferably from 20 to 48 hours with shaking culture using a liquid medium, but the time varies depending on the medium used. It is also possible to culture the bacteria on a solid medium obtained by adding agar to the same medium.
- D-aminoacylase is produced in the microbial cells obtained by such a method.
- Collection and purification of D-aminoacylase, which is the target substance, from the culture can be carried out in accordance with general enzyme collection and purification procedures. That is, the cells are separated from the culture by centrifugation or filtration, and the cells are disrupted by mechanical attrition or ultrasonic disruption, and then separated from the disrupted liquid by ordinary separation means, for example, hydrophobic chromatography, Examples of the method include collection and purification by ion exchange chromatography, hydroxyapatite chromatography, gel filtration chromatography, and the like.
- the enzymatic properties and amino acid sequence of the D-aminoacylase of the present invention thus obtained are as follows.
- the base sequence of the D-aminoacylase gene of the present invention is also shown below.
- Isoelectric point Denaturing two-dimensional electrophoresis (Daiichi Pure Chemicals, IPG tube gel “Daiichi” 4-10) and PAG large “Daiichi” 2D-10 / 20), and the isoelectric point was determined from the mobility of the 2D-protein isoelectric marker (2D-protein isoelectric marker 1st, manufactured by Daiichi Pure Chemicals Co., Ltd.). The I value is 5.3.
- Substrate specificity The following N-acetyl-D-amino acid and N-acetyl-L-amino acid are used as substrates to combine D-amino acid oxidase or L-amino acid oxidase with the acylase of the present invention. Substrate specificity was confirmed. It acts on the following N-acetyl-D-amino acids and does not act on N-acetyl-L amino acids.
- N-acetyl-D-valine As an N-acetyl-D-amino acid, N-acetyl-D-leucine, N-acetyl-D-methionine, N-acetyl-D-tryptophan, N-acetyl-D-phenylalanine It also acts on N-acetyl-D-tyrosine.
- N-acetyl-L-valine N-acetyl-L-one bite isine, N-acetyl-L-methionine, N-acetyl-L-tryptophan, N-acetyl-L-phenylalanine, or N-acetyl-L-tyrosine.
- the measurement of L-amino acid is carried out by the following activity measurement method, using an L-amino acid oxidase instead of a D-amino acid oxidase.
- Temperature stability Heat at 4 ° C, 25 ° C, 30 ° C, 40 ° C, and 50 ° C for 1 day at PH8.5, and measure the remaining enzyme activity according to the following activity measurement method. As a result, it is relatively stable from 4 ° C to 30 ° C.
- Optimum temperature 4 ° at pH 8 (: at 25, 30 ° C, 37 ° C, and 40 ° C, the enzyme activity was measured according to the following activity measurement method. Suitable.
- pH stability After heating at a temperature of 30 ° C for 1 day at pH 4 to 12, the remaining enzyme activity was measured according to the following activity measurement method. As a result, it was stable near PH9 and stable at pH7 to pH10. It is relatively stable up to the vicinity.
- the nucleotide sequence of the D-aminoacylase gene of the present invention and the amino acid sequence of the D-aminoacylase protein were determined by the following known methods.
- the nucleotide sequence of the D-aminoacylase gene of the present invention was determined to be the nucleotide sequence of SEQ ID NO: 1. Also, based on its base sequence, the D-aminoacylase protein of the present invention is an amino acid sequence represented by SEQ ID NO: 2. No acid sequence.
- the D-aminoacylase of the present invention includes (a) not only a protein having the amino acid sequence of SEQ ID NO: 2 but also (b) one or several amino acid sequences in the amino acid sequence of SEQ ID NO: 2. Is composed of a substituted, deleted or inserted amino acid sequence, and includes proteins having D-aminoacylase activity.
- the amino acid sequence in which one or several amino acid sequences have been substituted, deleted or inserted includes 80% or more, preferably 90% or more, more preferably 95% or more of the amino acid sequence of SEQ ID NO: 2.
- the D-aminoacylase gene of the present invention is not limited as long as it encodes the protein of (a) or (b), but (c) is a DNA consisting of only the nucleotide sequence of SEQ ID NO: 1.
- stringent conditions for example, conditions at 50 ° C in 0.2 X SSC containing 0.1% SDS, and 60 in 1 X SSC containing 0.1% SDS. The condition of C can be mentioned.
- DNA that hybridizes under the above stringent conditions contains DNA having 80% or more, preferably 90% or more, more preferably 95% or more homology with the nucleotide sequence of SEQ ID NO: 1. included.
- 111 is the amount of enzyme that catalyzes the production of 1 ⁇ mol of D-valine per minute.
- Method for measuring acylase using HP LC: Inertsil ODS-2 (GL Science Co., Ltd.) column, 0.015% 1 sodium monopentanesulfonate (pH 2.5): acetonitrile 80: 20 buffer
- the solution was used for analysis at a flow rate of 0.5 mL / min, detection at 230 nm, and a column temperature of 30 ° C.
- the enzymatic activity is calculated from the area ratio of the detected acetyl group and the free form, and the splitting ratio is calculated with no addition as 100, and expressed as a relative activity value.
- the obtained novel D-aminoacylase acts specifically on N-acetyl-D-amino acids and does not act on N-acetyl-L-amino acids, so that D-amino acids are produced from N-acetyl-D-amino acids. It can also be used to separate D-amino 'acids from N-acetyl-D, L-amino acids. That is, D- and L-amino acids are acetylated into N-acetyl-D and L-amino acids, and then D-aminoacylase is added to hydrolyze the N-acetyl-D-amino acids to form D-amino acids. This makes it possible to separate D-amino acids and L-amino acids. If only N-acetyl-D-amino acid is used, only D-amino acid can be obtained.
- the amount of D-aminoacylase added is usually in the range of 1 to 1000 U / mL substrate solution, preferably 50 to 500 U / mL substrate solution.
- the amount of N-acetyl-D, L-amino acid or N-acetyl-D-amino acid is preferably 1 to 40% by weight (hereinafter referred to as%), and more preferably 5 to 25% aqueous solution.
- the reaction temperature is preferably 10 to 50 ° C, more preferably 15 to 45 ° C.
- the pH is preferably 6.5 to 10.5, more preferably 7.5 to 10.
- the reaction time is preferably 0.2 to 10 days, more preferably 1 to 5 days.
- the D-amino acid can be separated and recovered from the reaction solution by a known method such as concentration, isoelectric point, precipitation, ion exchange resin treatment, membrane separation, and the like.
- the soil in the Iwate Plant of Daiichi Chemical Co., Ltd. was collected, and the cells were collected by the following method.
- ammonium nitrate 0.2%, potassium dihydrogen phosphate 0.2%, disodium hydrogen phosphate 0.1%, magnesium sulfate heptahydrate 0.055%, derivative N-acetyl-D As a medium, ammonium nitrate 0.2%, potassium dihydrogen phosphate 0.2%, disodium hydrogen phosphate 0.1%, magnesium sulfate heptahydrate 0.055%, derivative N-acetyl-D A small amount of soil was added to a medium containing 118.5 containing 0.2% L-valine and cultured with shaking at 30 ° C using a test tube. Next, the culture solution was plated out (inoculated) on a plate medium having the same medium composition containing 2% agar in the same medium, and the microorganisms grown after culturing at 30 ° C were separated.
- microorganisms having a different ability to produce D-aminoacylase were selected by the following two methods.
- D-Aminoacetylase activity measurement method 5 mL of 0. ImolZL phosphate buffer pH 8 4-Aminoantipyrine O. 6 lmg (manufactured by Nakarai Tesque, Code: 01907-52), N-Ethyl-N -(2-hydroxy-3-sulfopropyl) -3-methlani 1 ine, sodium, salt, dihydrate 3.22mg (Dojindo Laboratories, Code: 0C13), PEROXIDASE 30 unit (SIGMA, Code: P-6782), D—AMINO ACID OXIDASE 1 unit (SIGMA, Code: A—9128) was dissolved to give a color reagent.
- 100 L of this coloring reagent 100 L / L of N-acetyl-D, L-parin and 100 AtL of the above-mentioned culture and centrifuged and resuspended in a microplate cell were mixed at 37 ° C. After reacting for 1 hour at, the absorbance at 555 nm was measured using a microplate reader. The strain whose color was confirmed was selected as a strain having D-aminoacylase activity.
- D-amino acids or L-amino acids was analyzed based on the peak area at which N-acetyl-D-parin, N-acetyl-L-parin, D-parin, and L-valine were eluted. All strains selected by the method showed a rapid decrease in N-acetyl-D-valine and an increase in D-valine corresponding to the decrease in N-acetyl-D-valine.
- Defluvipactor SP A 131-3 strain was added to the medium used in Example 1 as a powdered yeast extract D-30.1% (manufactured by Wako Pure Chemical Industries, Ltd., Code: 390- 00531), Polyplon 0.1% (manufactured by Wako Pure Chemical Industries, Ltd., Code: 394-00115), 20 L of pH8 medium supplemented with 0.05% sodium salt and sodium citrate, Jafar amen Yuichi
- the culture was aerated at 30 ° (: 150 r / min for 27 hours with aeration and stirring).
- the turbidity (ABS 66 Onm) at the end of the culture was 1.52 T, pH 7.75.
- the cells were collected by centrifugation at 4000 rZmin for 60 minutes using a cooled centrifuge (manufactured by Hitachi Kiki Co., Ltd.). Collect the cells and add 20 t ol / L Tris-HCl
- This strain produced D-aminoacylase without the addition of N-acetyl-D, L-valine during culture, but the addition of N-acetyl-D, L-valine reduced the amount of enzyme production. It was possible to increase more than twice.
- the crude enzyme solution is packed in a dialysis tube, and then poured into a buffer solution containing 0.1 mol of ImolZL sodium chloride and buffered several times while stirring in a low-temperature room (4 ° C). The solution was exchanged and dialyzed overnight. After dialysis, high-speed cooling centrifuge
- the enzyme was eluted by the linear concentration gradient method using 570 OmL of 20 t ol / L Tris-HCl (pH8) buffer and 570 OmL of 20 olZL Tris-HCl (pH8) buffer containing 0.3 mol ZL sodium chloride. did. After running down the column, collect 25 mL of each fraction, measure the amount of protein (absorbance of 280 bands) and D-aminoacylase activity (see the enzyme activity measurement method below), and collect the active fraction. did.
- the D-aminoacylase enzyme activity of each fraction was determined by measuring the concentration of 4-Aminoantipyrine O. 61 mg (manufactured by Nacalai Tesque, Code: 01907-52) in 10 mL of 0.1 Imol / L phosphate buffer pH8, N-Ethyl- N- (2-hydroxy-3-sul f propyl) -3-met lani 1 ine, sodium, salt, dihydraie 3.22 rag (Doj indo Laboratories, Code: 0C13), PEROXIDASES Ounit (SIGMA, Code : P-6782) and 1 unit of D-AMINO ACID OXIDASE (Code: A-9128, manufactured by SIGMA) were dissolved to form a color reagent. N-Acetyl-D, L-valine 100 L, 100 l of enzyme sample, 0.1 mol / L phosphate buffer (pH 8)
- the fraction (968 mL) in which D-aminoacylase activity was observed by TOYOPEARL Super Q_650M chromatography was concentrated using an ultrafiltration membrane with a molecular weight cut-off of Vivaflow 50 (manufactured by Sartorius) having a molecular weight of 10,000. Furthermore, it was dialyzed against 5 mmo 1 / L phosphate buffer (pH 7.2).
- BIO-GEL HT BIO-GEL HT (BI0-RAD) hydroxyapatite column (2.2 ⁇ X2) in which 160 mL of this dialyzed enzyme solution was previously equilibrated with 5 fractions of 01 / L phosphate buffer (pH 7.2). Ocm).
- the column was washed with 35 OmL of 5IMO1ZL phosphate buffer (pH 7.2), followed by 75 OmL of 5IMO1ZL phosphate buffer (pH 7.2) and 200 t of olZL phosphate buffer (pH 7.2). 7.2)
- the enzyme was eluted with a linear concentration gradient method using 75 OmL. After the column flow, 25 mL fractions were collected, and the protein content and D-aminoacylase activity of each fraction were measured, and the active fraction was collected.
- the SDS-polyacrylamide gel electrophoresis method uses PAG mini “Daiichi” 10Z20 (Daiichi Pure Chemicals Co., Ltd.) and is based on the SDS-polyacrylamide gel electrophoresis operation method of Daiichi Kagaku. went.
- SDS—Sample treatment solution (manufactured by Daiichi Kagaku Chemical Co., Ltd.) 50 ⁇ L and purified fraction 50 L were mixed in the same amount, and the mixture was boiled for 5 minutes.
- the specific activity (ratio of enzyme activity to the amount of protein) and high purity were confirmed by electrophoresis.
- the active fractions were collected and ultrafiltered with a molecular weight cut off of Vivaflow 50 (manufactured by Sartorius Co., Ltd.). Concentration was performed using an ultrafiltration membrane with a molecular weight cut off of 7500 to obtain 28 niL of purified enzyme.
- Table 1 shows the enzyme purification yields obtained by this purification method.
- the enzymological properties of 0-aminoacylase (hereinafter sometimes referred to as the present enzyme) derived from Defluvivactor sp. 8131-3 obtained in Example 3 were measured by the following methods.
- the molecular weight was measured by the aforementioned SDS-polyacrylamide gel electrophoresis method (PAG mini “Daiichi” 10Z20, manufactured by Daiichi Kagaku).
- Protein molecular weight marker 1 (Daiichi Pure Chemical Co., Ltd., protein molecular weight marker 1st) ⁇ III) Phosphorylase b (97,400 daltons), ⁇ Serum albumin (66,267 daltons), Aldolase (42,400 Dalton), Carbonic Anhydrase (30,000 Dalton), 1, Lipsin Inhibitor Yuichi
- the isoelectric point of the protein is determined by denaturing two-dimensional electrophoresis (Daiichi Pure Chemicals Co., Ltd., IPG tube gel “Daiichi” 4-10 and PAG Large
- Substrate specificity was examined according to the above-mentioned activity measurement method using the D- and L-amino acid oxidase coloring reagent. That is, the reaction was carried out using 200 mol / L, 100 ⁇ / L, 50 Mmol L, 20 rnl L, and 10 mol / L of each D-amino acid and L-amino acid as a substrate.
- a calibration curve of enzyme activity was prepared from the relationship between the absorbance at 555 nm and the substrate concentration.
- 111 is the amount of the enzyme that catalyzes the production of 1 mol / L of each D-amino acid and L-amino acid per minute, and was calculated from the relational expression with the D-amino acid and L-amino acid concentrations obtained above. .
- the substrate specificity is shown in Table 2 based on the relative activities when N-acetyl-D-methionine was set to 100 and when N-acetyl-D-valine was set to 100.
- N Acetyl D—Within amino acids It works best on N-acetyl-D-valine and on N-acetyl-D-leucine, N-acetyl-D-methionine, N-acetyl-D-tryptophan, N-acetyl-D-phenylalanine, N-acetyl-D-tyrosine. Also worked.
- N-acetyl-D-glutamic acid did not act on N-acetyl-D-glutamic acid.
- Optimum temperature of this enzyme solution at pH 8 at 4 ° C, 25 ° C, 30 ° C, 37 ° C, and 40 ° C is determined by the above-mentioned method for measuring D-aminoacylase activity using D-amino acid oxidase. Activity was measured and confirmed.
- Figure 3 shows the optimal temperature of this enzyme. The activity of this enzyme was optimal at 37 ° C.
- the pH stability is determined by heating this enzyme from PH4 to 12 at a temperature of 30 ° C for 1 day, and measuring the residual activity after pH treatment according to the D-aminoacylasidase activity measurement method using D-amino acid oxidase described above. Measured and confirmed.
- Figure 4 shows the PH stability of this enzyme. As a result, this enzyme was most stable around pH 9, and the remaining activity was more than 50% from around pH 7 to around pH 10, and was relatively stable. The residual activity did not become 0% even at pH 6 or pH 11.
- the optimum pH was determined by measuring the enzyme activity at 37 ° C and a pH of 6 to 12 in accordance with the D-aminoacylase activity measurement method using D_amino acid oxidase described above.
- Figure 5 shows the optimum pH of this enzyme. This enzyme has the best pH around pH 8.5. Worked well.
- the effect of metal ions was determined by adding calcium chloride '27_K solvate to a final concentration of limnol / L in a reaction solution containing 0.5 mol / L N-acetyl-D-valine and this enzyme solution (500 U).
- Iron (III) chloride hexahydrate, sodium chloride, salt and salt (II) salt, 67 hydrate, potassium chloride, nickel salt and salt, hexahydrate, magnesium chloride, hexahydrate, sulfuric acid Add copper (II) 57 hydrate, manganese (II) chloride tetrahydrate, zinc chloride, sodium molybdate and heat at 40 ° C for 1 day to reduce the amount of D-valine produced.
- the splitting ratio when each metal was added was determined from the area ratio of N-acetyl-D-valine and D-valine measured by the HPLC method described below. Was determined as a relative value.
- the flow rate was 0.5 mLZ, the detection was 230 nm, and the column temperature was 30 ° (11 ° C).
- Sodium molybdate 105 10.
- the effect of the inhibitor is as follows: In a reaction solution containing 0.5 mol ZL N-acetyl-D-parin and this enzyme solution (500 U), adjust the final concentration to 5 mmol / L with ethylenediaminetetraacetic acid, 2-mercaptoethanol, N- Ethylmaleimide, 0-phenanthrene, L-cystine, lodoacetamide 7 and dithiothreitol were added, heated at 40 ° C for 1 day, and the amount of D-valine produced was measured by the HPLC method described above. From the detected area ratios of N-acetyl-D-parin and D-parin, the splitting ratio when each inhibitor was added was determined, and the relative value was calculated with the splitting ratio without addition of the inhibitor being 100.
- this enzyme had a relative activity of less than 50% in 5.0 diol thiol and 2-mercaptoethanol of 5.0 olZL, a relative activity of less than 60% in 0-phenanthrin, and L- The relative activity was reduced to less than 80% with cysteine, inhibiting the activity.
- the strain was purified from Defluvibacter sp. A131-3 (Defluvibacter sp. A131-3), and its N-terminal and internal amino acid sequences were analyzed by a known method based on the isolated D-aminoacylase. End; KSFDLVIRNGRVVDP, Internal: AQAQGLXITXEA, TALIPAQIVER sequences were obtained. N-terminal and internal sequence mixed primers containing all possible DNA sequences from this amino acid ATHMGIAAYGGI Two types of MGIGTIGT (SEQ ID NO: 3) and 0 ⁇ 1001 ⁇ ? 616 (16081 (SEQ ID NO: 4)) were prepared. I represents inosine.
- genomic DNA was extracted from the cultured cells of Defluvipactor SP A131-3 using a known method.
- a PCR reaction was performed with a Hot Star Taq (manufactured by QIAGEN) using the mixed primer obtained from the purified enzyme and genomic DNA obtained from the cultured cells.
- a reaction solution (101) containing the following in a buffer solution provided by the supplier was used: dNTP 200 M, each primer 5 Opmol, defluvactor-SP1 A131 100 ng of genomic DNA and 1 unit of DNA polymerase.
- the reaction was performed after denaturation at 95 ° C for 15 minutes 1) denaturation step at 95 ° C for 30 seconds; 2) annealing step at 40 ° C for 30 seconds; 3) at 72 ° C.
- the synthesis step of 90 seconds was performed for 30 cycles.
- Type I used for the Inverse PCR method was T4 Ligase obtained by digesting and purifying 5 g of the genome extracted from Defluvibactor sp. The one cyclized by (NEB) was used. The reaction was performed after denaturation at 95 ° C for 15 minutes 1) denaturation step at 94 ° C for 30 seconds; 2) 60. (The annealing step in: for 30 seconds; 3) The synthesis step at 72 ° C. for 4 minutes was performed 30 cycles. The obtained PCR product was cloned using pCR2.1 topo, and the total base sequence (all genes) was determined.
- N-terminal outer and C-terminal primers ATGGCCAAAAGCTTCG ATCTC SEQ ID NO: 7
- TCATCGCGGCGTGCTCCGGATG SEQ ID NO: 8
- Hot Star Taq was performed after denaturation at 95 ° C for 15 minutes 1) 94 ° Denaturation step at C for 30 seconds; 2) annealing step at 58 ° C for 30 seconds; 3) synthesis step at 72 ° C for 2 minutes, 30 cycles, and KODplus reaction at 95 denaturation After 2 minutes 1) denaturation step at 94 ° C for 30 seconds; 2) annealing step at 58 ° C for 30 seconds; 3) synthesis step at 68 ° C for 30 cycles of 2 minutes.
- the obtained PCR product is cloned using pCR2.1 topo, the nucleotide sequences of the clones are compared, and the nucleotide sequence of the D-aminoacylase gene of the present invention (SEQ ID NO: 1) and the D-aminoacylase of the present invention are compared.
- SEQ ID NO: 2 the nucleotide sequence of the D-aminoacylase gene of the present invention
- N-acetyl-L-valine was not decomposed at all, confirming that this enzyme has practical utility in producing D-amino acids.
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03780848A EP1574568A4 (en) | 2002-12-18 | 2003-12-17 | D-AMINOACYLASE |
AU2003289400A AU2003289400A1 (en) | 2002-12-18 | 2003-12-17 | D-aminoacylase |
JP2004560651A JP4489598B2 (ja) | 2002-12-18 | 2003-12-17 | D−アミノアシラーゼ |
US10/539,281 US20060172375A1 (en) | 2002-12-18 | 2003-12-17 | D-aminoacylase |
US11/627,256 US20080096244A1 (en) | 2002-12-18 | 2007-01-25 | D-aminoacylase |
US12/397,879 US20090215118A1 (en) | 2002-12-18 | 2009-03-04 | D-aminoacylase |
US13/345,399 US20120149071A1 (en) | 2002-12-18 | 2012-01-06 | D-aminoacylase |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-366389 | 2002-12-18 | ||
JP2002366389 | 2002-12-18 | ||
JP2003-351560 | 2003-10-10 | ||
JP2003351560 | 2003-10-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/627,256 Continuation US20080096244A1 (en) | 2002-12-18 | 2007-01-25 | D-aminoacylase |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004055179A1 true WO2004055179A1 (ja) | 2004-07-01 |
Family
ID=32599278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016182 WO2004055179A1 (ja) | 2002-12-18 | 2003-12-17 | D−アミノアシラーゼ |
Country Status (5)
Country | Link |
---|---|
US (4) | US20060172375A1 (ja) |
EP (1) | EP1574568A4 (ja) |
JP (1) | JP4489598B2 (ja) |
AU (1) | AU2003289400A1 (ja) |
WO (1) | WO2004055179A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006254789A (ja) * | 2005-03-17 | 2006-09-28 | Toyobo Co Ltd | D−アミノアシラーゼの活性向上方法 |
JP2008061642A (ja) * | 2006-08-10 | 2008-03-21 | Toyobo Co Ltd | D−アミノ酸の製造方法 |
JP2009082026A (ja) * | 2007-09-28 | 2009-04-23 | Asahi Kagaku Kogyo Kk | D−アミノアシラーゼによるd−アミノ酸の製造方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116926139A (zh) * | 2022-04-12 | 2023-10-24 | 元素驱动(杭州)生物科技有限公司 | 一种n-乙酰-d-氨基酸、d-氨基酸、d-氨基酸衍生物的制备方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0950706A2 (en) * | 1998-03-17 | 1999-10-20 | DAICEL CHEMICAL INDUSTRIES, Ltd. | D-aminoacylase |
EP0976828A1 (en) * | 1998-07-29 | 2000-02-02 | DAICEL CHEMICAL INDUSTRIES, Ltd. | Fungal D-aminoacylases and method for producing D-amino acids |
WO2002061077A1 (fr) * | 2001-02-01 | 2002-08-08 | Mitsui Chemicals, Inc. | Adn codant une nouvelle d-aminoacylase et procede pour produire un d-aminoacide au moyen de cet adn |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4063400B2 (ja) * | 1997-07-31 | 2008-03-19 | ダイセル化学工業株式会社 | D−アミノアシラーゼ |
JP4327301B2 (ja) * | 1999-06-17 | 2009-09-09 | 天野エンザイム株式会社 | 形質転換微生物、d−アミノアシラーゼの製造方法 |
JP4526157B2 (ja) * | 2000-01-27 | 2010-08-18 | ダイセル化学工業株式会社 | D−アミノアシラーゼ、およびそれをコードする遺伝子 |
JP4502295B2 (ja) * | 2000-08-02 | 2010-07-14 | ダイセル化学工業株式会社 | 耐熱性d−アミノアシラーゼ |
-
2003
- 2003-12-17 US US10/539,281 patent/US20060172375A1/en not_active Abandoned
- 2003-12-17 JP JP2004560651A patent/JP4489598B2/ja not_active Expired - Fee Related
- 2003-12-17 EP EP03780848A patent/EP1574568A4/en not_active Withdrawn
- 2003-12-17 WO PCT/JP2003/016182 patent/WO2004055179A1/ja active Application Filing
- 2003-12-17 AU AU2003289400A patent/AU2003289400A1/en not_active Abandoned
-
2007
- 2007-01-25 US US11/627,256 patent/US20080096244A1/en not_active Abandoned
-
2009
- 2009-03-04 US US12/397,879 patent/US20090215118A1/en not_active Abandoned
-
2012
- 2012-01-06 US US13/345,399 patent/US20120149071A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0950706A2 (en) * | 1998-03-17 | 1999-10-20 | DAICEL CHEMICAL INDUSTRIES, Ltd. | D-aminoacylase |
EP0976828A1 (en) * | 1998-07-29 | 2000-02-02 | DAICEL CHEMICAL INDUSTRIES, Ltd. | Fungal D-aminoacylases and method for producing D-amino acids |
WO2002061077A1 (fr) * | 2001-02-01 | 2002-08-08 | Mitsui Chemicals, Inc. | Adn codant une nouvelle d-aminoacylase et procede pour produire un d-aminoacide au moyen de cet adn |
Non-Patent Citations (7)
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006254789A (ja) * | 2005-03-17 | 2006-09-28 | Toyobo Co Ltd | D−アミノアシラーゼの活性向上方法 |
JP4513967B2 (ja) * | 2005-03-17 | 2010-07-28 | 東洋紡績株式会社 | D−アミノアシラーゼの活性向上方法 |
JP2008061642A (ja) * | 2006-08-10 | 2008-03-21 | Toyobo Co Ltd | D−アミノ酸の製造方法 |
JP2009082026A (ja) * | 2007-09-28 | 2009-04-23 | Asahi Kagaku Kogyo Kk | D−アミノアシラーゼによるd−アミノ酸の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1574568A4 (en) | 2006-10-11 |
US20090215118A1 (en) | 2009-08-27 |
US20060172375A1 (en) | 2006-08-03 |
US20080096244A1 (en) | 2008-04-24 |
AU2003289400A1 (en) | 2004-07-09 |
JP4489598B2 (ja) | 2010-06-23 |
US20120149071A1 (en) | 2012-06-14 |
JPWO2004055179A1 (ja) | 2006-04-20 |
EP1574568A1 (en) | 2005-09-14 |
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