Uncharacterized subgroup of the nitrilase superfamily (putative class 13 nitrilases)
The nitrilase superfamily is 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 represents either 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.