Identification of the Grincamycin Gene Cluster Unveils Divergent Roles for GcnQ in Different Hosts, Tailoring the <scp>l</scp>-Rhodinose Moiety
作者:Yun Zhang、Hongbo Huang、Qi Chen、Minghe Luo、Aijun Sun、Yongxiang Song、Junying Ma、Jianhua Ju
DOI:10.1021/ol401253p
日期:2013.7.5
The gene cluster responsible for grincamycin (GCN, 1) biosynthesis in Streptomyces lusitanus SCSIO LR32 was identified; heterologous expression of the GCN cluster in S. coelicolor M512 yielded P-1894B (1b) as a predominant product. The Delta gcnQ mutant accumulates intermediate la and two shunt products 2a and 3a bearing L-rhodinose for L-cinerulose A substitutions. In vitro data demonstrated that GcnQ is capable of iteratively tailoring the two L-rhodinose moieties into L-aculose moieties, supporting divergent roles of GcnQ in different hosts.