>gnl|CDD|143600 cd07576, R-amidase_like, Pseudomonas sp. MCI3434 R-amidase and related proteins (putative class 13 nitrilases). Pseudomonas sp. MCI3434 R-amidase hydrolyzes (R,S)-piperazine-2-tert-butylcarboxamide to form (R)-piperazine-2-carboxylic acid. It does so with strict R-stereoselectively. Its preferred substrates are carboxamide compounds which have the amino or imino group connected to their beta- or gamma-carbon. This subgroup belongs 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. It has been suggested that this subgroup represents a new class. Members of the nitrilase superfamily generally form homomeric complexes, the basic building block of which is a homodimer. Native R-amidase however appears to be a monomer. Length = 254

 Score =  102 bits (256), Expect = 3e-22
 Identities = 59/228 (25%), Positives = 102/228 (44%), Gaps = 32/228 (14%)

Query: 6   KIAIAQLNPVVGDIAGNIAKARRAREEANRQGMDLILFTELFISGYPPEDLVFKKSFIQA 65
           ++A+ Q     GD+A N+A+   A   A   G DL++F ELF++GY   D V + +  + 
Sbjct: 1   RLALYQGPARDGDVAANLARLDEAAARAAAAGADLLVFPELFLTGYNIGDAVARLA--EP 58

Query: 66  CS-SAIDTLKSDTHDGGAGIVVGFPRQDQEGVLNSVVILDA-GNIIAVRDKINLPNYSEF 123
               A+  L++     G  IVVG+P +    V N+ V++D  G ++A   K +L   S  
Sbjct: 59  ADGPALQALRAIARRHGIAIVVGYPERAGGAVYNAAVLIDEDGTVLANYRKTHLFGDS-- 116

Query: 124 HEKRTFISGYSNDPIVFRDIRLGILICEDIWKNSNICKHLKKQGAEFLF--SLNASPYYH 181
            E+  F  G     +  R +R+G+LIC D+ +   + + L   GA+ +   +    PY  
Sbjct: 117 -ERAAFTPGDRFPVVELRGLRVGLLICYDV-EFPELVRALALAGADLVLVPTALMEPYGF 174

Query: 182 NKLKKRHEIVTGQISHV---------HLPIIYVNQVGGQDELIFDGAS 220
                        ++            + + Y N+ G +D L + G S
Sbjct: 175 -------------VARTLVPARAFENQIFVAYANRCGAEDGLTYVGLS 209