Rapid preparation of (methyl)malonyl coenzyme A and enzymatic formation of unusual polyketides by type III polyketide synthase from Aquilaria sinensis
摘要:
(Methyl) malonyl coenzyme A was rapidly and effectively synthesized by a two-step procedure involving preparation of N-hydroxysuccinimidyl (methyl) malonate from (methyl) Meldrum's acid, and followed by transesterification with coenzyme A. The synthesized (methyl) malonyl coenzyme A could be well accepted and assembled to 4-hydroxy phenylpropionyl coenzyme A by type III polyketide synthase from Aquilaria sinensis to produce dihydrochalcone and 4-hydroxy-3,5-dimethyl-6-(4-hydroxyphenethyl)-2H-pyrone as well as 4-hydroxy-3,5-dimethyl-6-(5-(4-hydroxyphenyl)-3-oxopentan-2-yl)-2H-pyrone. (C) 2015 Elsevier Ltd. All rights reserved.
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
Identification of a new curcumin synthase from ginger and construction of a curcuminoid-producing unnatural fusion protein diketide-CoA synthase::curcumin synthase
The new curcumin synthase and the unnatural fusion protein reported here are useful for metabolic engineering of pharmaceutically important curcuminoids.
这里报告的新型姜黄素合成酶和非自然融合蛋白质,对于代谢工程制备重要的药用姜黄素具有实用价值。
Cloning and Functional Characterization of Two 4-Coumarate: CoA Ligase Genes from Selaginella moellendorffii
extensively characterized in other vascular plants, little is known of their functions in Selaginella. Here, we isolated two 4CL genes (Sm4CL1 and Sm4CL2) fromSelaginellamoellendorffii. Based on the enzymatic activities of the recombinant proteins, both of these genes encoded bona fide 4CLs. The 4CL isoforms in S. moellendorffii have different activities: Sm4CL2 was more active than Sm4CL1. The enzymatic properties
Curcuminoidsynthase (CUS) fromOryzasativa is a plant-specific type III polyketide synthase (PKS) that catalyzes the remarkable one-pot formation of the C(6)-C(7)-C(6) diarylheptanoid scaffold of bisdemethoxycurcumin, by the condensation of two molecules of 4-coumaroyl-CoA and one molecule of malonyl-CoA. The crystalstructure of O. sativaCUS was solved at 2.5-A resolution, which revealed a unique
来自水稻的类姜黄素合酶 (CUS) 是一种植物特异性 III 型聚酮化合物合酶 (PKS),可催化双去甲氧基姜黄素的 C(6)-C(7)-C(6) 二芳基庚烷类支架的显着单锅形成,通过两分子 4-香豆酰辅酶 A 和一分子丙二酰辅酶 A 的缩合。O. sativa CUS 的晶体结构以 2.5-A 的分辨率解析,揭示了一种独特的向下扩展的活性位点结构,以前在已知的 III 型 PKS 中未发现。大的活性位点腔足够长以容纳两个 C(6)-C(3) 香豆酰单元和一个丙二酰单元。此外,晶体结构表明存在推定的亲核水分子,该分子与 Ser351-Asn142-H(2)O-Tyr207-Glu202 形成氢键网络,邻近活性中心的催化 Cys174。这些观察结果表明,CUS 采用独特的催化机制,用于 C(6)-C(7)-C(6) 支架的一锅形成。因此,CUS 利用亲核水在双酮阶段终止初始聚酮链延长。酶结合中间体的硫酯键断裂产生
An Atypical Acyl‐CoA Synthetase Enables Efficient Biosynthesis of Extender Units for Engineering a Polyketide Carbon Scaffold
new acyl-CoA synthetase (ACS, UkaQ) with broad substrate specificity and an unusual catalytic mode was identified. Its stability and catalytic activity were remarkably improved by protein engineering, enabling it to synthesize a large variety of acyl-CoAs. In combination with permissive carboxylases, diverse extenderunits were synthesized and used to engineer the polyketidecarbonscaffold of antimycin
鉴定了一种具有广泛底物特异性和不寻常催化模式的新型酰基辅酶 A 合成酶(ACS,UkaQ)。蛋白质工程显着提高了其稳定性和催化活性,使其能够合成多种酰基辅酶 A。结合允许的羧化酶,合成了多种扩展单元,并用于设计抗霉素的聚酮化合物碳支架。