4-羟基苯甲酰基-辅酶 A 在
4-hydroxyphenylacyl-CoA 、 4-hydroxybenzoyl-CoA thioesterase from Arthobacter sp. Strain SU 、 水 作用下,
以
aq. buffer 为溶剂,
生成 对羟基苯甲酸
参考文献:
名称:
来自节杆菌属的热狗折叠酶超家族 4-羟基苯甲酰-CoA 硫酯酶的催化机制。应变苏
摘要:
来自节杆菌属的热狗折叠酶 4-羟基苯甲酰辅酶 A (4-HB-CoA) 硫酯酶。AU 菌株在 4-氯苯甲酸脱卤途径的最后一步催化 4-HB-CoA 水解形成 4-羟基苯甲酸 (4-HB) 和辅酶 A (CoA)。受已发表的配体酶 X 射线结构的指导(Thoden, JB, Zhuang, Z., Dunaway-Mariano, D., and Holden HM (2003) J. Biol. Chem. 278, 43709–43716),制备了一系列定点突变体,用于测试活性位点残基在底物结合和催化中的作用。对突变硫酯酶进行 X 射线结构测定,以确认天然折叠的保留,并在某些情况下,揭示活性位点构型的变化。同时,对野生型和突变型硫酯酶进行瞬态和稳态动力学分析,并进行18 O 溶剂标记实验。提供的证据表明 Glu73 在亲核催化中起作用,Gly65 和 Gln58通过以下方式促进过渡态稳定与硫酯部分形成氢键,并且
A versatile biosynthetic approach to amide bond formation
作者:Helena K. Philpott、Pamela J. Thomas、David Tew、Doug E. Fuerst、Sarah L. Lovelock
DOI:10.1039/c8gc01697f
日期:——
The development of versatile and sustainable catalytic strategies for amide bond formation is a major objective for the pharmaceutical sector and the wider chemical industry. Herein, we report a biocatalytic approach to amidesynthesis which exploits the diversity of Nature's amide bond forming enzymes, N-acyltransferases (NATs) and CoA ligases (CLs). By selecting combinations of NATs and CLs with
Coenzyme A‐Conjugated Cinnamic Acids – Enzymatic Synthesis of a CoA‐Ester Library and Application in Biocatalytic Cascades to Vanillin Derivatives
作者:Martin Dippe、Anne‐Katrin Bauer、Andrea Porzel、Evelyn Funke、Anna O. Müller、Jürgen Schmidt、Maria Beier、Ludger A. Wessjohann
DOI:10.1002/adsc.201900892
日期:2019.12.3
coenzyme A (CoA) with cinnamic acids. The reaction, which is the initial step in the biosynthesis of a multitude of bioactive secondary metabolites, is catalyzed by a promiscuous plant ligase and yields CoA conjugates with different functionalization in high purity and without formation of by‐products. Its applicability in biosynthetic cascades is shown for the direct transformation of cinnamic acids into
Isolation from bovine liver mitochondria and characterization of three distinct carboxylic acid:CoA ligases with activity toward xenobiotics
作者:Donald A. Vessey、Jie Hu
DOI:10.1002/jbt.2570100608
日期:1995.10
was fractionated on a DEAE-cellulose column into four distinct acyl-CoA ligase fractions. First to elute was a 50 kDa short-chain ligase that activated only short-chain fatty acids. Next to elute were threeligases that had activitytoward both medium-chain fatty acids and xenobioticcarboxylicacids; these were termed xenobiotic/medium-chain ligases (X-ligases) and labeled XL-I, XL-II, and XL-III, respectively
Structure–activity analysis of base and enzyme-catalyzed 4-hydroxybenzoyl coenzyme A hydrolysis
作者:Feng Song、Zhihao Zhuang、Debra Dunaway-Mariano
DOI:10.1016/j.bioorg.2006.07.002
日期:2007.2
a slope (rho) of 1.5. In the case of the enzyme-catalyzed hydrolysis, the kcat/Km values measured for the para-substituted analogs defined substratespecificity. Asp32 was shown to play a key role in substrate recognition, and in particular, in the discrimination between the targeted substrate and other cellular benzoyl-CoA thioesters.
PROCESS OF BIOLOGICALLY PRODUCING TEREPHTHALIC ACID AND DERIVATIVE THEREOF
申请人:Samsung Electronics Co., Ltd.
公开号:US20140155570A1
公开(公告)日:2014-06-05
A method of biologically producing an terephthalic acid or a derivative thereof by contacting a substrate containing an aromatic carboxylic acid with a biocatalyst that adds a carboxyl group at the para-position of the aromatic carboxylic acid.