The stress-responsive alternative sigma factor SigB of Bacillus subtilis and its relatives: an old friend with new functions
| dc.citation.title | Frontiers in Microbiology | |
| dc.citation.volume | 11 | |
| dc.creator | Rodríguez Ayala, Facundo | |
| dc.creator | Bartolini, Marco | |
| dc.creator | Grau, Roberto Ricardo | |
| dc.date.accessioned | 2021-04-14T00:52:03Z | |
| dc.date.available | 2021-04-14T00:52:03Z | |
| dc.date.issued | 2020-09-15 | |
| dc.description | Alternative sigma factors have led the core RNA polymerase (RNAP) to recognize different sets of promoters to those recognized by the housekeeping sigma A-directed RNAP. This change in RNAP promoter selectivity allows a rapid and flexible reformulation of the genetic program to face environmental and metabolic stimuli that could compromise bacterial fitness. The model bacterium Bacillus subtilis constitutes a matchless living system in the study of the role of alternative sigma factors in gene regulation and physiology. SigB from B. subtilis was the first alternative sigma factor described in bacteria. Studies of SigB during the last 40 years have shown that it controls a genetic universe of more than 150 genes playing crucial roles in stress response, adaption, and survival. Activation of SigB relies on three separate pathways that specifically respond to energy, environmental, and low temperature stresses. SigB homologs, present in other Gram-positive bacteria, also play important roles in virulence against mammals. Interestingly, during recent years, other unexpected B. subtilis responses were found to be controlled by SigB. In particular, SigB controls the efficiencies of spore and biofilm formation, two important features that play critical roles in adaptation and survival in planktonic and sessile B. subtilis communities. In B. subtilis, SigB induces the expression of the Spo0E aspartyl-phosphatase, which is responsible for the blockage of sporulation initiation. The upregulated activity of Spo0E connects the two predominant adaptive pathways (i.e., sporulation and stress response) present in B. subtilis. In addition, the RsbP serine-phosphatase, belonging to the energy stress arm of the SigB regulatory cascade, controls the expression of the key transcription factor SinR to decide whether cells residing in the biofilm remain in and maintain biofilm growth or scape to colonize new niches through biofilm dispersal. SigB also intervenes in the recognition of and response to surrounding microorganisms, a new SigB role that could have an agronomic impact. SigB is induced when B. subtilis is confronted with phytopathogenic fungi (e.g., Fusarium verticillioides) and halts fungal growth to the benefit of plant growth. In this article, we update and review literature on the different regulatory networks that control the activation of SigB and the new roles that have been described the recent years. | es |
| dc.description | Para citar este articulo: Rodriguez Ayala F, Bartolini M and Grau R (2020) The Stress-Responsive Alternative Sigma Factor SigB of Bacillus subtilis and Its Relatives: An Old Friend With New Functions. Front. Microbiol. 11:1761. doi: 10.3389/fmicb.2020.01761 | |
| dc.description.fil | Fil: Rodríguez Ayala, Facundo. Comisión Nacional de Energía Atómica (CNEA). Departamento de Micro y Nanotecnología, Instituto de Nanociencia y Nanotecnología; Argentina. | |
| dc.description.fil | Fil: Rodríguez Ayala, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina. | |
| dc.description.fil | Fil: Bartolini, Marco. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina. | |
| dc.description.fil | Fil: Bartolini, Marco. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Departamento de Microbiología; Argentina. | |
| dc.description.fil | Fil: Grau, Roberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina. | |
| dc.description.fil | Fil: Grau, Roberto Ricardo. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Departamento de Microbiología; Argentina. | |
| dc.description.sponsorship | Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) | es |
| dc.description.sponsorship | Fondo para la Investigación Científica y Tecnológica (FONCYT) | es |
| dc.description.sponsorship | Pew Latin American Program in Biomedical Sciences | es |
| dc.description.sponsorship | Fulbright Committee | es |
| dc.description.sponsorship | Fundación Antorchas | es |
| dc.format | application/pdf | |
| dc.format.extent | 1-20 | |
| dc.identifier.issn | 1664-302X | |
| dc.identifier.uri | http://hdl.handle.net/2133/20495 | |
| dc.language.iso | eng | es |
| dc.publisher | Frontiers Media | es |
| dc.relation.publisherversion | https://doi.org/10.3389/fmicb.2020.01761 | es |
| dc.relation.publisherversion | https://www.frontiersin.org/articles/10.3389/fmicb.2020.01761/full | es |
| dc.rights | openAccess | es |
| dc.rights.holder | Rodríguez Ayala, Facundo | es |
| dc.rights.holder | Bartolini, Marco | es |
| dc.rights.holder | Grau, Roberto Ricardo | es |
| dc.rights.holder | Universidad Nacional de Rosario | |
| dc.rights.text | Attribution 4.0 International (CC BY 4.0) | es |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | * |
| dc.subject | Bacillus subtilis | es |
| dc.subject | Alternative Sigma Factors | es |
| dc.subject | SigB | es |
| dc.subject | General Stress Response | es |
| dc.subject | Biofilms | es |
| dc.subject | Biocontrol | es |
| dc.subject | Sporulation | es |
| dc.title | The stress-responsive alternative sigma factor SigB of Bacillus subtilis and its relatives: an old friend with new functions | es |
| dc.type | publishedVersion |