Engineering of regulatory cascades and networks controlling antibiotic biosynthesis in Streptomyces

被引:178
作者
Martin, Juan-Francisco [1 ,2 ]
Liras, Paloma [1 ,2 ]
机构
[1] Univ Leon, Area Microbiol, Dept Mol Biol, E-24071 Leon, Spain
[2] Inst Biotechnol Leon, Leon 24006, Spain
关键词
PHOR-PHOP SYSTEM; SECONDARY METABOLISM; TYLOSIN BIOSYNTHESIS; PHOSPHATE CONTROL; CEPHAMYCIN-C; NITROGEN-METABOLISM; CARBON SOURCE; COELICOLOR; GENE; PROTEIN;
D O I
10.1016/j.mib.2010.02.008
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Engineering of regulatory mechanisms that control the biosynthesis of bioactive secondary metabolites is an approach to increase the production of valuable fermentation products. Two types of regulatory mechanisms have been studied in Streptomyces species: (1) pyramidal cascades of regulation that usually involve a butyrolactone and its receptor protein triggering the formation of pathway-associated regulatory proteins (SARP), and (2) global regulators that transduce protein phosphorylation signals responding to stress factors. Global regulators are frequently two-component systems; for example, the PhoR-PhoP system, the AsbA1-AsbA2, the orphan response regulator GInR and the STAND-family regulator AfsR. Several strategies have been used to obtain overproducer strains, including: (i) obtention of phosphate-deregulated mutants by alteration of phoP, (ii) amplification and/or overexpression of pathway-associated positive regulators, and (iii) modification of butyrolactone receptor proteins. The success of these strategies is hampered by the poor knowledge of interactions between regulatory mechanisms.
引用
收藏
页码:263 / 273
页数:11
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