title: Regulation of CtsR activity in low GC, Gram+ bacteria.
abstract: CtsR is the global transcriptional regulator of the core protein quality networks in low GC, Gram+ bacteria. Balancing these networks during environmental stress is of considerable importance for moderate survival of the bacteria, and also for virulence of pathogenic species. Therefore, inactivation of the CtsR repressor is one of the major cellular responses for fast and efficient adaptation to different protein stress conditions. Historically, CtsR inactivation was mainly studied for the heat stress response, and recently it has been shown that CtsR is an intrinsic thermosensor. Moreover, it has been demonstrated that CtsR degradation is regulated by a two-step mechanism during heat stress, dependent on the arginine kinase activity of McsB. Interestingly, CtsR is also inactivated during oxidative stress, but by a thiol-dependent regulatory pathway. These observations suggest that dual activity control of CtsR activity has developed during the course of evolution.
authors.affiliation: Ernst-Moritz-Arndt-University Greifswald, Institute of Microbiology, Greifswald, Germany.
authors.forename: Alexander K W
authors.initials: AK
authors.lastname: Elsholz
authors.forename: Ulf
authors.initials: U
authors.lastname: Gerth
authors.forename: Michael
authors.initials: M
authors.lastname: Hecker
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D001482:Base Composition; D015964:Gene Expression Regulation, Bacterial; D006094:Gram-Positive Bacteria / Q000235:genetics* / Q000378:metabolism* / Q000472:pathogenicity; D006358:Hot Temperature; D050296:Microbial Viability; D018384:Oxidative Stress; D012097:Repressor Proteins / Q000378:metabolism*; D013312:Stress, Physiological; D014774:Virulence
chemical_list: D001426:Bacterial Proteins; C118338:CtsR protein, bacteria; D012097:Repressor Proteins