Family in the SLOG superfamily, related to YspA and cpYpsA families and shows associations with NAD utilization and ADP-ribosylation domains including NUDIX, NADAR and MACRO. Members of this family are predicted to function as sensors of nucleotide, nucleotide-derived ligands, or nucleic acids, which are potentially processed/modified by associating effectors. Also associates in a distinct system with a phosphoribosyltransferase (PRTase) domain [1].

1: Comparative genomic analyses reveal a vast, novel network of nucleotide-centric systems in biological conflicts, immunity and signaling. Burroughs AM, Zhang D, Schaffer DE, Iyer LM, Aravind L; Nucleic Acids Res. 2015;43:10633-10654. PMID:26590262