Genetically engineered production of 1,1'-bis-valienamine and validienamycin in Streptomyces hygroscopicus and their conversion to valienamine.
Genetically engineered production of 1,1'-bis-valienamine and validienamycin in Streptomyces hygroscopicus and their conversion to valienamine.
复制标题
在吸水链霉菌中通过基因工程生产 1,1'-双缬草胺和有效霉素及其转化为缬草胺。
DOI:
10.1007/s00253-008-1711-z
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发表时间:
2009-01
影响因子:
5
通讯作者:
Mahmud, Taifo
中科院分区:
文献类型:
--
作者:
Xu, Hui;Yang, Jongtae;Bai, Linquan;Deng, Zixin;Mahmud, Taifo
The antifungal agent validamycin A is an important crop protectant and the source of valienamine, the precursor of the antidiabetic drug voglibose. Inactivation of the valN gene in the validamycin A producer, Streptomyces hygroscopicus subsp. jinggangensis 5008, resulted in a mutant strain that produces new secondary metabolites 1,1′-bis-valienamine and validienamycin. The chemical structures of 1,1′-bis-valienamine and validienamycin were elucidated by 1D and 2D NMR spectroscopy in conjunction with mass spectrometry and bioconversion employing a glycosyltransferase enzyme, ValG. 1,1′-bis-Valienamine and validienamycin exhibit a moderate antifungal activity against Pellicularia sasakii. Chemical degradation of 1,1′-bis-valienamine using N-bromosuccinimide followed by purification of the products with ion-exchange column chromatography only resulted in valienamine, whereas parallel treatments of validoxylamine A, the aglycon of validamycin A, resulted in an approximately 1:1 mixture of valienamine and validamine, underscoring the advantage of 1,1′-bis-valienamine over validoxylamine A as a commercial source of valienamine.
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影响因子:
15
作者:
Shing, TKM;Kwong, CSK;Cheng, CHK
通讯作者:
Cheng, CHK
影响因子:
15
作者:
Dong, HJ;Mahmud, T;Floss, HG
通讯作者:
Floss, HG
DOI:
10.1073/pnas.0337542100
发表时间:
2003-02-18
影响因子:
11.1
作者:
Gust, B;Challis, GL;Chater, KF
通讯作者:
Chater, KF
影响因子:
6.6
作者:
Mahmud, T;Lee, S;Floss, HG
通讯作者:
Floss, HG
影响因子:
3.2
作者:
Minagawa, Kazuyuki;Zhang, Yirong;Mahmud, Taifo
通讯作者:
Mahmud, Taifo