Methyltransferases of gentamicin biosynthesis.
Methyltransferases of gentamicin biosynthesis.
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庆大霉素生物合成的甲基转移酶
DOI:
10.1073/pnas.1711603115
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发表时间:
2018-02-06
影响因子:
11.1
通讯作者:
Sun Y
中科院分区:
文献类型:
--
作者:
Li S;Guo J;Reva A;Huang F;Xiong B;Liu Y;Deng Z;Leadlay PF;Sun Y
Significance Aminoglycosides remain a vital clinical asset. Gentamicin C complex in particular is remarkably potent in treating systemic Gram-negative infections, and semisynthetic gentamicins that combat pathogen resistance or show reduced toxicity remain attractive goals. We report here the roles of clustered genes and enzymes that define a methylation network in gentamicin biosynthesis and also identify a remote gene on the chromosome encoding the essential methyltransferase GenL, which is decisive for the proportions of the five major components present in the gentamicin C complex. This is an important step toward engineered fermentation to produce single components as valuable starting materials for semisynthesis of next-generation aminoglycoside antibiotics. Gentamicin C complex from Micromonospora echinospora remains a globally important antibiotic, and there is revived interest in the semisynthesis of analogs that might show improved therapeutic properties. The complex consists of five components differing in their methylation pattern at one or more sites in the molecule. We show here, using specific gene deletion and chemical complementation, that the gentamicin pathway up to the branch point is defined by the selectivity of the methyltransferases GenN, GenD1, and GenK. Unexpectedly, they comprise a methylation network in which early intermediates are ectopically modified. Using whole-genome sequence, we have also discovered the terminal 6′-N-methyltransfer required to produce gentamicin C2b from C1a or gentamicin C1 from C2, an example of an essential biosynthetic enzyme being located not in the biosynthetic gene cluster but far removed on the chromosome. These findings fully account for the methylation pattern in gentamicins and open the way to production of individual gentamicins by fermentation, as starting materials for semisynthesis.
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影响因子:
6.7
作者:
Ni, Xianpu;Zong, Tingting;Xia, Huanzhang
通讯作者:
Xia, Huanzhang
影响因子:
--
作者:
Guo J;Huang F;Huang C;Duan X;Jian X;Leeper F;Deng Z;Leadlay PF;Sun Y
通讯作者:
Sun Y
影响因子:
1.2
作者:
Hong, Wenrong;Yan, Lingbin
通讯作者:
Yan, Lingbin
DOI:
10.1007/s00467-016-3533-z
发表时间:
2017-11
期刊:
Pediatric nephrology (Berlin, Germany)
影响因子:
--
作者:
McWilliam SJ;Antoine DJ;Smyth RL;Pirmohamed M
通讯作者:
Pirmohamed M
影响因子:
--
作者:
Huang C;Huang F;Moison E;Guo J;Jian X;Duan X;Deng Z;Leadlay PF;Sun Y
通讯作者:
Sun Y