IcmQ in the Type 4b secretion system contains an NAD+ binding domain.
Structure (London, England : 1993)
Farelli, Jeremiah D JD; Gumbart, James C JC; Akey, Ildikó V IV; Hempstead, Andrew A; Amyot, Whitney W; Head, James F JF; McKnight, C James CJ; Isberg, Ralph R RR; Akey, Christopher W CW