Xanthomonas campestris XC1258 and related proteins, members of the nitrilase superfamily (putative class 13 nitrilases)
Uncharacterized subgroup belonging to a larger nitrilase superfamily comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13), class 13 represents proteins that at the time were difficult to place in a distinct similarity group; this subgroup either represents a new class or one that was included previously in class 13. Members of this superfamily generally form homomeric complexes, the basic building block of which is a homodimer. XC1258 is a homotetramer.