Anti-sigma factor antagonist (IPR003658)

Short name: Anti-sigma_ant

Overlapping homologous superfamilies

Family relationships


An anti-sigma factor antagonist is an anti-anti-sigma factor, which relieves inhibition of sigma factor activity by the anti-sigma factor. Examples include the Bacillus subtilis SpoIIAA protein, which, in its phosphorylated form, acts as an anti-anti-sigma factor to relieve SpoIIAB inhibition of sigma F; and the anti-sigma B factor antagonist, RsbV, which counteracts the RsbW-mediated inhibition of sigma B by binding to RsbW.

GO terms

Biological Process

GO:0006355 regulation of transcription, DNA-templated

Molecular Function

GO:0045152 antisigma factor binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.