A process for preparing (R)-hydroxy ester (II)
1
from alpha-keto ester I
2
comprising adding the alpha-keto ester I to a mixture comprising the ketoreductase enzyme and non-ketoreductase enzyme components, wherein the ketoreductase enzyme has a molecular weight between 36000 and 38000, and wherein the ketoreductase enzyme has an N-terminal amino acid sequence selected from the group of sequences consisting of
1
(SEQ. ID NO. 1)
Ala-Ile-Pro-Asp-Asn-Ala-Val-Leu-Glu-Gly-Ser-Leu-
Val-Lys-Val-Thr-Gly-Ala-Asn-Gly
(SEQ. ID NO. 4)
Met-Ala-Ile-Pro-Asp-Asn-Ala-Val-Leu-Glu-Gly-Ser-
Leu-Val-Lys-Val-Thr-Gly-Ala-Asn-Gly, and
(SEQ. ID NO. 2)
Met-Ala-Lys-Ile-Asp-Asn-Ala-Val-Leu-Pro-Glu-Gly-
Ser-Leu-Val-Leu-Val-Thr-Gly-Ala-Asn-Gly.
制备(R)-羟基酯(II)的工艺
1
从α-酮酯 I
2
包括将α-酮酯 I 加入到由酮还原酶和非酮还原酶组分组成的混合物中,其中酮还原酶的分子量在 36000 和 38000 之间,酮还原酶的 N 端氨基酸序列选自由下列序列组成的组
1
(SEQ. ID NO. 1)
Ala-Ile-Pro-Asp-Asn-Ala-Val-Leu-Glu-Gly-Ser-Leu-
Val-Lys-Val-Thr-Gly-Ala-Asn-Gly
(SEQ. ID NO. 4)
Met-Ala-Ile-Pro-Asp-Asn-Ala-Val-Leu-Glu-Gly-Ser-
Leu-Val-Lys-Val-Thr-Gly-Ala-Asn-Gly,以及
(SEQ. ID NO. 2)
Met-Ala-Lys-Ile-Asp-Asn-Ala-Val-Leu-Pro-Glu-Gly-
Ser-Leu-Val-Leu-Val-Thr-Gly-Ala-Asn-Gly。
US5710322A
申请人:——
公开号:US5710322A
公开(公告)日:1998-01-20
US7109004B2
申请人:——
公开号:US7109004B2
公开(公告)日:2006-09-19
Metathetical transposition of bis-tert-alkyl ketones. 2. Structural effects on alkyl migration. Existence of linear relation networks