Iterative assembly of two separate polyketide chains by the same single-module bacterial polyketide synthase in the biosynthesis of HSAF.
Iterative assembly of two separate polyketide chains by the same single-module bacterial polyketide synthase in the biosynthesis of HSAF.
复制标题
DOI:
10.1002/anie.201403500
复制
发表时间:
2014-07-14
影响因子:
16.6
通讯作者:
Du, Liangcheng
中科院分区:
文献类型:
--
作者:
Li, Yaoyao;Chen, Haotong;Ding, Yanjiao;Xie, Yunxuan;Wang, Haoxin;Cerny, Ronald L.;Shen, Yuemao;Du, Liangcheng
Antifungal HSAF (heat‐stable antifungal factor, dihydromaltophilin) is a polycyclic tetramate macrolactam from the biocontrol agentLysobacter enzymogenes. Its biosynthetic gene cluster contains only a single‐module polyketide synthase–nonribosomal peptide synthetase (PKS‐NRPS), although two separate hexaketide chains are required to assemble the skeleton. To address the unusual biosynthetic mechanism, we expressed the biosynthetic genes in two “clean” strains ofStreptomycesand showed the production of HSAF analogues and a polyene tetramate intermediate. We then expressed the PKS module inEscherichia coliand purified the enzyme. Upon incubation of the enzyme with acyl‐coenzyme A and reduced nicotinamide adenine dinucleotide phosphate (NADPH), a polyene was detected in the tryptic acyl carrier protein (ACP). Finally, we incubated the polyene–PKS with the NRPS module in the presence of ornithine and adenosine triphosphate (ATP), and we detected the same polyene tetramate as that inStreptomycestransformed with the PKS‐NRPS alone. Together, our results provide evidence for an unusual iterative biosynthetic mechanism for bacterial polyketide–peptide natural products.
登录
查看更多内容
影响因子:
3.2
作者:
Jiang, Yuhai;Wang, Haoxin;Shen, Yuemao
通讯作者:
Shen, Yuemao
影响因子:
15
作者:
Yakasai, Ahmed A.;Davison, Jack;Cox, Russell J.
通讯作者:
Cox, Russell J.
影响因子:
2.9
作者:
Lou, Lili;Chen, Haotong;Cerny, Ronald L.;Li, Yaoyao;Shen, Yuemao;Du, Liangcheng
通讯作者:
Du, Liangcheng
DOI:
10.1073/pnas.120163297
发表时间:
2000-06-06
影响因子:
11.1
作者:
Datsenko, KA;Wanner, BL
通讯作者:
Wanner, BL
影响因子:
4.9
作者:
Yu, Fengan;Zaleta-Rivera, Kathia;Du, Liangcheng
通讯作者:
Du, Liangcheng