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Small acid-soluble spore protein O family 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 organizm. 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. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",