Small acid-soluble spore protein, SspO (IPR012613)

Short name: SASP_SspO

Overlapping homologous superfamilies


Family relationships



This family consists of the small acid-soluble spore proteins (SASP) O type (sspO). SspO (originally cotK) are unique to the spores of Bacillus subtilis and are expressed only in the forespore compartment of sporulating cells of this organism. The sspO is the first gene in a likely operon with sspP and transcription of this gene is primarily by RNA polymerase with the forespore-specific sigma factor, sigma-G. Mutation deleting sspO causes the loss of the SspO from the forespore but had no discernible effect on sporulation, spore properties or spore germination [PMID: 10806362].

GO terms

Biological Process

GO:0030436 asexual sporulation

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0042601 endospore-forming forespore

Contributing signatures

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