Members of the RdgC family may have exonuclease activity. RdgC is required for efficient pilin variation in Neisseria gonorrhoeae, suggesting that it may be involved in recombination reactions [1]. In Escherichia coli, RdgC is required for growth in recombination-deficient exonuclease-depleted strains. Under these conditions, RdgC may act as an exonuclease to remove collapsed replication forks, in the absence of the normal repair mechanisms [2].

1: A homologue of the recombination-dependent growth gene, rdgC, is involved in gonococcal pilin antigenic variation. Mehr IJ, Long CD, Serkin CD, Seifert HS; Genetics 2000;154:523-532. PMID:10655208

2: Recombination-dependent growth in exonuclease-depleted recBC sbcBC strains of Escherichia coli K-12. Ryder L, Sharples GJ, Lloyd RG; Genetics 1996;143:1101-1114. PMID:8807285