Required for optimal transformation. Localizes at the cell poles of most competence-expressing cells (PubMed:17630974). During competence a number of proteins (at least CoiA, ComFA, ComGA, DprA, RecA and SsbB) are thought to colocalize at the cell pole (PubMed:17630974). Preferentially expressed in cells competent for DNA transformation; that is 5-15% of the population (PubMed:17630974).