Carboxymethylproline synthase catalysed syntheses of functionalised N-heterocycles
作者:Refaat B. Hamed、Jasmin Mecinović、Christian Ducho、Timothy D. W. Claridge、Christopher J. Schofield
DOI:10.1039/b924519g
日期:——
The utility of wild-type and variant carboxymethylproline synthases for biocatalysis was demonstrated by preparing functionalised 5-, 6- and 7-membered N-heterocycles from amino acid aldehydes and (alkylated) malonyl-coenzyme A derivatives; the N-heterocycles produced were converted to the corresponding bicyclic β-lactams by a carbapenem synthetase.
通过从氨基酸醛和(烷基化)丙二酰辅酶 A 衍生物制备功能化的 5、6 和 7 元 N-杂环,证明了野生型和变异型羧甲基脯氨酸合成酶在生物催化方面的用途;生成的 N-杂环通过碳青霉烯合成酶转化为相应的双环 β-内酰胺。
Three Unusual Reactions Mediate Carbapenem and Carbapenam Biosynthesis
作者:Rongfeng Li、Anthony Stapon、Joanne T. Blanchfield、Craig A. Townsend
DOI:10.1021/ja001723l
日期:2000.9.1
Method for Late Introduction of the (8R)-Hydroxyl Group Carbapenem Beta-Lactam Antibiotic Synthesis
申请人:Townsend Craig Arthur
公开号:US20130066066A1
公开(公告)日:2013-03-14
The presently disclosed subject matter demonstrates that ThnG and ThnQ enzymes encoded by the thienamycin gene cluster in
Streptomyces cattleya
oxidize the C-2 and C-6 moieties of carbapenems, respectively. ThnQ stereospecifically hydroxylates PS-5 giving N-acetyl thienamycin. ThnG catalyzes sequential desaturation and sulfoxidation of PS-5, giving PS-7 and its sulfoxide. The ThnG and ThnQ enzymes are relatively substrate selective, but give rise to the oxidative diversity of carbapenems produced by
S. cattleya,
and orthologues likely function similarly in allied
streptomyces.
US9139588B2
申请人:——
公开号:US9139588B2
公开(公告)日:2015-09-22
Definition of the Common and Divergent Steps in Carbapenem β-Lactam Antibiotic Biosynthesis
作者:Micah J. Bodner、Rongfeng Li、Ryan M. Phelan、Michael F. Freeman、Kristos A. Moshos、Evan P. Lloyd、Craig A. Townsend
DOI:10.1002/cbic.201100366
日期:2011.9.19
Antibioticbiosynthesis: Thienamycin and (5R)‐carbapen‐2‐em‐3‐carboxylate (1) are structurally related carbapenem β‐lactam antibiotics that are produced by phylogenetically distant organisms. The biosynthesis of 1 is well understood, thienamycin biosynthesis is not. Here we demonstrate that formation of these carbapenems is functionally and stereochemically identical through only the first two biosynthetic
抗生素生物合成:硫霉素和 (5 R )-carbapen-2-em-3-carboxylate ( 1 ) 是结构相关的碳青霉烯 β-内酰胺抗生素,由系统发育较远的生物体产生。 1的生物合成是众所周知的,但硫霉素的生物合成却不是。在这里,我们证明这些碳青霉烯类的形成仅通过前两个生物合成步骤在功能和立体化学上是相同的。