ECF RNA polymerase sigma factor SigE

UniProtKB accession:  P9WGG7

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UniProtKB description:  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. Responds to heat shock and surface stress (detergent exposure). When combined with isolated core RNA polymerase from M.smegmatis is able to guide initiation from the sigB promoter. Required for full expression of sigB, and for sigB induction after detergent exposure but not after heat shock. Controls a regulon of about 38 genes in culture (PubMed:11489128) and about 16 genes during macrophage infection (PubMed:18657035), most of which have decreased expression in a disruption mutant. Probably down regulates the host immune response to mycobacterial infection.