Sensing and responding to diverse extracellular signals: An updated analysis of the sensor kinases and response regulators of Streptomyces spp

Thomas C. McLean, Rebecca Lo, Natalia Tschowri, Paul Hoskisson, Mahmoud Al Bassam, Matthew Hutchings, Nicolle Som

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Abstract

Streptomyces venezuelae is a Gram-positive, filamentous actinomycete with a complex developmental life cycle. Genomic analysis revealed that S. venezuelae encodes a large number of two-component systems (TCS): comprised of a membrane-bound sensor kinase (SK) and a cognate response regulator (RR). These proteins act together to detect and respond to diverse extracellular signals. Some of these systems have been shown to regulate antimicrobial biosynthesis in Streptomyces species, making them very attractive to researchers. The ability of S. venezuelae to sporulate in both liquid and solid cultures has made it an increasingly popular model organism in which to study these industrially and medically important bacteria. Bioinformatic analysis identified 58 TCS operons in S. venezuelae with an additional 27 orphan SK and 18 orphan RR genes. A broader approach identified 15 of the 58 encoded TCS to be highly-conserved in 93 Streptomyces species for which high quality and complete genome sequences are available. This review attempts to unify the current work on two-component systems in the streptomycetes, with an emphasis on S. venezuelae.
Original languageEnglish
JournalMicrobiology
Volume165
Issue number9
Early online date23 Jul 2019
DOIs
Publication statusPublished - 1 Sep 2019

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