6dvd

Structural highlights

Function

[RPOZ_MYCTU] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits.^[1] [RPOA_MYCTU] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_00059]^[2] [RPOC_MYCTU] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01322]^[3] [RPOB_MYCTU] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[HAMAP-Rule:MF_01321] [SIGL_MYCTU] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. Extracytoplasmic function (ECF) sigma factors are held in an inactive form by an anti-sigma factor until released by regulated intramembrane proteolysis. Over-expression of SigL induces 19-28 genes including polyketide synthases, secreted and membrane proteins. Might play a minor role in regulating SigB.^{[4] [5]}

References

1. ↑ Hu Y, Morichaud Z, Chen S, Leonetti JP, Brodolin K. Mycobacterium tuberculosis RbpA protein is a new type of transcriptional activator that stabilizes the sigma A-containing RNA polymerase holoenzyme. Nucleic Acids Res. 2012 Aug;40(14):6547-57. doi: 10.1093/nar/gks346. Epub 2012, May 8. PMID:22570422 doi:http://dx.doi.org/10.1093/nar/gks346
2. ↑ Hu Y, Morichaud Z, Chen S, Leonetti JP, Brodolin K. Mycobacterium tuberculosis RbpA protein is a new type of transcriptional activator that stabilizes the sigma A-containing RNA polymerase holoenzyme. Nucleic Acids Res. 2012 Aug;40(14):6547-57. doi: 10.1093/nar/gks346. Epub 2012, May 8. PMID:22570422 doi:http://dx.doi.org/10.1093/nar/gks346
3. ↑ Hu Y, Morichaud Z, Chen S, Leonetti JP, Brodolin K. Mycobacterium tuberculosis RbpA protein is a new type of transcriptional activator that stabilizes the sigma A-containing RNA polymerase holoenzyme. Nucleic Acids Res. 2012 Aug;40(14):6547-57. doi: 10.1093/nar/gks346. Epub 2012, May 8. PMID:22570422 doi:http://dx.doi.org/10.1093/nar/gks346
4. ↑ Hahn MY, Raman S, Anaya M, Husson RN. The Mycobacterium tuberculosis extracytoplasmic-function sigma factor SigL regulates polyketide synthases and secreted or membrane proteins and is required for virulence. J Bacteriol. 2005 Oct;187(20):7062-71. doi: 10.1128/JB.187.20.7062-7071.2005. PMID:16199577 doi:http://dx.doi.org/10.1128/JB.187.20.7062-7071.2005
5. ↑ Dainese E, Rodrigue S, Delogu G, Provvedi R, Laflamme L, Brzezinski R, Fadda G, Smith I, Gaudreau L, Palu G, Manganelli R. Posttranslational regulation of Mycobacterium tuberculosis extracytoplasmic-function sigma factor sigma L and roles in virulence and in global regulation of gene expression. Infect Immun. 2006 Apr;74(4):2457-61. PMID:16552079 doi:http://dx.doi.org/10.1128/IAI.74.4.2457-2461.2006