Many of the members of this family are described as transcription factors. CoiA falls within a competence-specific operon in Streptococcus. CoiA is an uncharacterised protein.

1: Identification of novel restriction endonuclease-like fold families among hypothetical proteins. Kinch LN, Ginalski K, Rychlewski L, Grishin NV; Nucleic Acids Res. 2005;33:3598-3605. PMID:15972856