Process for producing optically active 4-halo-3-hydroxybutanoate
申请人:——
公开号:US20030134402A1
公开(公告)日:2003-07-17
There are provided a polynucleotide sequence coding for an amino acid sequence capable of preferentially producing (S)-4-bromo-3-hydroxy-butanoate by asymmetrically reducing 4-bromo-3-oxobutanoate, A DNA construct having a promoter in operative linkage with the polynucleotide sequence, a recombinant vector containing the polynucleotide sequences a transformant, a recombinant vector and the like.
The synthesis of (4R-cis)-1,1-dimethylethyl 6-cyanomethyl-2,2-dimethyl-1,3-dioxane-4-acetate, a key intermediate for the preparation of CI-981, a highly potent, tissue selective inhibitor of HMG-CoA reductase
作者:Philip L. Brower、Donald E. Butler、Carl F. Deering、Tung V. Le、Alan Millar、Thomas N. Nanninga、Bruce D. Roth
DOI:10.1016/s0040-4039(00)74189-x
日期:1992.4
Three alternative methods for the synthesis of the optically active heptanoate (6), a key intermediate in the preparation of a highlypotent and tissue selective HMG Co-A reductaseinhibitor are described.
Disclosed are novel substituted cyclohexenyl phosphinylhydroxybutyrates as 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors useful as antihypercholesterolemic agents represented by the formula: ##STR1## and pharmaceutically acceptable salts thereof.
producing methyl 4-bromo-3-hydroxybutyrate enantiomers was developed using an engineered protein. Escherichia coli transformant cells containing a mutant β-keto ester reductase (KER-L54Q) from Penicillium citrinum and a cofactor-regeneration enzyme such as glucose dehydrogenase (GDH) or Leifsonia sp. alcohol dehydrogenase (LSADH) were used to produce methyl (S)-4-bromo-3-hydroxybutyrate from methyl 4-bromo-3-oxobutyrate
There are disclosed a reductase having good heat stability, which resulted in decrease in reaction time and improvement of reaction efficiency. Specifically, disclosed is an enzyme having an amino acid sequence of SEQ ID NO:1 in which at least one of the amino acids of the positions 245 and 271 of the amino acid sequence of SEQ ID NO:1 is replaced with another amino acid(s); a polynucleotide having a nucleotide sequence that encodes the amino acid sequence of said reductase; a vector containing said polynucleotide; a transformant containing said polynucleotide or said vector, and the like.
本发明公开了一种具有良好热稳定性的还原酶,其导致反应时间减少和反应效率提高。具体而言,本发明公开了一种酶,其具有SEQ ID NO:1的氨基酸序列,其中SEQ ID NO:1的氨基酸序列的位置245和271中的至少一个氨基酸被替换为另一种氨基酸;编码所述还原酶的氨基酸序列的核苷酸序列的多聚核苷酸;包含所述多聚核苷酸的载体;包含所述多聚核苷酸或所述载体的转化体等。