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| Content Provider | PubMed Central |
|---|---|
| Author | Schneider, Jessica S. Sklar, Joseph G. Glickman, Michael S. |
| Copyright Year | 2014 |
| Abstract | Regulated intramembrane proteolysis of membrane-embedded substrates by site-2 proteases (S2Ps) is a widespread mechanism of transmembrane signal transduction in bacteria and bacterial pathogens. We previously demonstrated that the Mycobacterium tuberculosis S2P Rip1 is required for full virulence in the mouse model of infection. Rip1 controls transcription in part through proteolysis of three transmembrane anti-sigma factors, anti-SigK, -L, and -M, but there are also Rip1-dependent, SigKLM-independent pathways. To determine the contribution of the sigma factors K, L, and M to the Δrip1 attenuation phenotype, we constructed an M. tuberculosis ΔsigKΔ sigL ΔsigM mutant and found that this strain fails to recapitulate the marked attenuation of Δrip1 in mice. In a search for additional pathways controlled by Rip1, we demonstrated that the SigD regulon is positively regulated by the Rip1 pathway. Rip1 cleavage of transmembrane anti-SigD is required for expression of SigD target genes. In the absence of Rip1, proteolytic maturation of RsdA is impaired. These findings identify RsdA/SigD as a fourth arm of the branched pathway controlled by Rip1 in M. tuberculosis. |
| Related Links | http://dx.doi.org/10.1128/jb.01537-14 |
| Ending Page | 2645 |
| Page Count | 8 |
| Starting Page | 2638 |
| File Format | |
| ISSN | 00219193 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 14 |
| Volume Number | 196 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2014-07-15 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Molecular Biology Microbiology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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