The MtrAB two-component system controls antibiotic production in Streptomyces coelicolor A3(2).

The MtrAB two-component system controls antibiotic production in Streptomyces coelicolor A3(2).
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DOI:
10.1099/mic.0.000524
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发表时间:
2017-10
期刊:
Microbiology (Reading, England)
影响因子:
--
通讯作者:
Hutchings MI
Hutchings MI
中科院分区:
其他
文献类型:
--
作者:
Som NF;Heine D;Holmes N;Knowles F;Chandra G;Seipke RF;Hoskisson PA;Wilkinson B;Hutchings MI

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MtrAB是一个高度保守的双组分系统,参与放线菌的细胞分裂调控。在单细胞结核分枝杆菌中,它协调DNA复制和细胞分裂,并将抗生素的产生与丝状委内瑞拉链霉菌的孢子形成联系起来。氯霉素的生物合成直接受S.委内瑞拉和mtrB的缺失组成型激活MtrA并导致氯霉素的组成型过量生产。在这里,我们报告说,在天蓝色链霉菌,MtrA结合位点上游的发育基因和基因编码ActII-1,ActII-4和RedZ,这是集群定位的监管机构的抗生素放线菌紫素(法案)和十一烷基灵菌红素(红色)。与此一致,mtrB的缺失开启Act、Red和链脲菌素B(Red途径的产物)的产生。因此,我们建议,MtrA是一个关键的调节器,链接抗生素生产的发展,并可用于上调抗生素生产的远亲链霉菌。
MtrAB is a highly conserved two-component system implicated in the regulation of cell division in the Actinobacteria. It coordinates DNA replication with cell division in the unicellular Mycobacterium tuberculosis and links antibiotic production to sporulation in the filamentous Streptomyces venezuelae. Chloramphenicol biosynthesis is directly regulated by MtrA in S. venezuelae and deletion of mtrB constitutively activates MtrA and results in constitutive over-production of chloramphenicol. Here we report that in Streptomyces coelicolor, MtrA binds to sites upstream of developmental genes and the genes encoding ActII-1, ActII-4 and RedZ, which are cluster-situated regulators of the antibiotics actinorhodin (Act) and undecylprodigiosin (Red). Consistent with this, deletion of mtrB switches on the production of Act, Red and streptorubin B, a product of the Red pathway. Thus, we propose that MtrA is a key regulator that links antibiotic production to development and can be used to upregulate antibiotic production in distantly related streptomycetes.
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