biosynthesized from acyl-CoA precursors by polyketide synthases. One of the limitations to combinatorial biosynthesis of polyketides has been the lack of a toolkit that describes the means of delivering novel acyl-CoA precursors necessary for polyketide biosynthesis. Using five acid-CoA ligases obtained from various plants and microorganisms, we biosynthesized an initial library of 79 acyl-CoA thioesters by screening
KASIIIs are known to be involved in the initiation step of polyketide and fatty acid biosynthesis. In vitro reconstitution of the upper triene chain of asukamycin unveils two highly unusual KASIIIs which both exhibit initiation and iterative elongation activity. Together with the permissive ketoreductase and dehydratase, these C−C bond-forming enzymes can synthesize a large variety of polyenes.
已知 KAS III 参与聚酮化合物和脂肪酸生物合成的起始步骤。Asukamycin 上三烯链的体外重组揭示了两种非常不寻常的 KAS III,它们都表现出起始和迭代延伸活性。与允许的酮还原酶和脱水酶一起,这些 C-C 键形成酶可以合成多种多烯。
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。
BioWF: A Naturally‐Fused, Di‐Domain Biocatalyst from Biotin Biosynthesis Displays an Unexpectedly Broad Substrate Scope
作者:Shona M. Richardson、Peter J. Harrison、Michael A. Herrera、Menglu Wang、Rebecca Verez、Gustavo Perez Ortiz、Dominic J. Campopiano
DOI:10.1002/cbic.202200171
日期:2022.9.5
A BioWF fusion biocatalyst can convert various fatty acid substrates to α-oxoamine (AON) products. The ATP-dependent BioW domain catalyses formation of an acyl-CoA thioester intermediate. The pyridoxal 5’-phosphate (PLP)-dependent BioF domain then accepts various amino acids and catalyses the formation of a range of aminoketone analogues.
Screening and Engineering the Synthetic Potential of Carboxylating Reductases from Central Metabolism and Polyketide Biosynthesis
作者:Dominik M. Peter、Lennart Schada von Borzyskowski、Patrick Kiefer、Philipp Christen、Julia A. Vorholt、Tobias J. Erb
DOI:10.1002/anie.201505282
日期:2015.11.2
Carboxylating enoyl‐thioester reductases (ECRs) are a recently discovered class of enzymes. They catalyze the highly efficient addition of CO2 to the double bond of α,β‐unsaturated CoA‐thioesters and serve two biological functions. In primary metabolism of many bacteria they produce ethylmalonyl‐CoA during assimilation of the central metabolite acetyl‐CoA. In secondary metabolism they provide distinct