Method for producing hydroxy-l-pipecolic acid

Patent metadata

Field	Value
Publication number	US-2018273993-A1
Application number	US-201615765148-A
Country	US
Kind code	A1
Filing date	Sep 30, 2016
Priority date	Oct 2, 2015
Publication date	Sep 27, 2018
Grant date	—

Abstract

A novel method of producing high-purity hydroxy-L-pipecolic acids in an efficient and inexpensive manner while suppressing the production of hydroxy-L-proline is provided. The method includes allowing an L-pipecolic acid hydroxylase, a microorganism or cell having the ability to produce the enzyme, a processed product of the microorganism or cell, and/or a culture liquid comprising the enzyme and obtained by culturing the microorganism or cell, to act on L-pipecolic acid as a substrate in the presence of 2-oxoglutaric acid and ferrous ion, wherein the L-pipecolic acid hydroxylase has the properties:
(1) the enzyme can act on L-pipecolic acid in the presence of 2-oxoglutaric acid and ferrous ion to add a hydroxy group to the carbon atom at positions 3, 4, and/or 5 of L-pipecolic acid; and (2) the enzyme has a catalytic efficiency (kcat/Km) with L-proline that is equal to or less than 7 times the catalytic efficiency (kcat/Km) with L-pipecolic acid.

First claim

1 . A method of producing a hydroxy-L-pipecolic acid, the method comprising:
allowing an L-pipecolic acid hydroxylase, a microorganism or cell having the ability to produce the enzyme, a processed product of the microorganism or cell, and/or a culture liquid comprising the enzyme and obtained by culturing the microorganism or cell, to act on L-pipecolic acid as a substrate in the presence of 2-oxoglutaric acid and ferrous ion, wherein the L-pipecolic acid hydroxylase has the properties (1) and (2) below: (1) the enzyme can act on L-pipecolic acid in the presence of 2-oxoglutaric acid and ferrous ion to add a hydroxy group to the carbon atom at positions 3, 4, and/or 5 of L-pipecolic acid; and (2) the enzyme has a catalytic efficiency (kcat/Km) with L-proline that is equal to or less than 7 times the catalytic efficiency (kcat/Km) with L-pipecolic acid.

2 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , further comprising:
allowing L-lysine and/or DL-lysine to react with
(i-1) one or more enzymes selected from the group consisting of an L-amino acid oxidase, an L-amino acid dehydrogenase and an L-amino acid aminotransferase, or
(i-2) an amino acid racemase and one or more enzymes selected from the group consisting of a D-amino acid oxidase, a D-amino acid dehydrogenase and a D-amino acid aminotransferase,
for the production of 3,4,5,6-tetrahydropyridine-2-carboxylic acid; and subsequently allowing an N-methyl-L-amino acid dehydrogenase to act on the 3,4,5,6-tetrahydropyridine-2-carboxylic acid for the production of the L-pipecolic acid as the substrate.

3 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , further comprising:
allowing L-lysine to react with one or more enzymes selected from the group consisting of an L-lysine 6-oxidase, an L-lysine 6-dehydrogenase and an L-lysine 6-aminotransferase, for the production of 2,3,4,5-tetrahydropyridine-2-carboxylic acid; and subsequently allowing a pyrroline-5-carboxylate reductase to act on the 2,3,4,5-tetrahydropyridine-2-carboxylic acid for the production of the L-pipecolic acid as the substrate.

4 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , further comprising allowing a lysine cyclodeaminase to act on L-lysine for the production of the L-pipecolic acid as the substrate.

5 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , wherein the content of L-proline in the L-pipecolic acid as the substrate is not more than 10% (w/w).

6 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , wherein the L-pipecolic acid hydroxylase further has the property (3) below:
(3) the microorganism or cell having the ability to produce the L-pipecolic acid hydroxylase, or the processed product of the microorganism or cell has a hydroxy-L-proline-producing activity that is not more than 55%, where a ratio of 100% corresponds to the hydroxy-L-pipecolic acid-producing activity of the same microorganism or cell, or of the same processed product.

7 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , wherein the L-pipecolic acid hydroxylase comprises the protein (A), (B), or (C) below:
(A) a protein having an amino acid sequence represented by SEQ ID NO: 2, 12, 14, 16, 18, or 20; (B) a protein having the same amino acid sequence as the amino acid sequence represented by SEQ ID NO: 2, 12, 14, 16, 18, or 20 except that one or several amino acids are deleted, substituted, inserted, and/or added, which protein has the aforementioned properties (1) and (2); (C) a protein having an amino acid sequence with an identity of not less than 80% to the amino acid sequence represented by SEQ ID NO: 2, 12, 14, 16, 18, or 20, which protein has the aforementioned properties (1) and (2).

8 . The method of producing a hydroxy-L-pipecolic acid according to claim 1 , wherein the microorganism or cell having the ability to produce the L-pipecolic acid hydroxylase is a microorganism or cell transformed with DNA encoding the L-pipecolic acid hydroxylase.

9 . The method of producing a hydroxy-L-pipecolic acid according to claim 8 , wherein the DNA encoding the L-pipecolic acid hydroxylase comprises the DNA (D), (E), or (F) below:
(D) DNA having a nucleotide sequence represented by SEQ ID NO: 1, 11, 13, 15, 17, or 19; (E) DNA comprising the same nucleotide sequence as the nucleotide sequence represented by SEQ ID NO: 1, 11, 13, 15, 17, or 19 except that one or several bases are deleted, substituted, inserted, and/or added, which DNA encodes a protein having the aforementioned properties (1) and (2); (F) DNA comprising a nucleotide sequence which hybridizes with a complementary strand of the nucleotide sequence represented by SEQ ID NO: 1, 11, 13, 15, 17, or 19 under stringent conditions, which DNA encodes a protein having the aforementioned properties (1) and (2).

Assignees

• Api Corp

Inventors

• Miyake Ryoma
• Kawabata Hiroshi

Classifications

• C12Y114/11028

  Proline 3-hydroxylase (1.14.11.28) · CPC title

• C12P17/12 Primary

  containing a six-membered hetero ring · CPC title

• C12N9/0071 Primary

  acting on paired donors with incorporation of molecular oxygen (1.14) · CPC title

• C12N9/1096

  transferring nitrogenous groups (2.6) · CPC title

• C12N9/0016

  with NAD or NADP as acceptor (1.4.1) · CPC title