>gnl|CDD|143596 cd07572, nit, Nit1, Nit 2, and related proteins, and the Nit1-like domain of NitFhit (class 10 nitrilases). This subgroup includes mammalian Nit1 and Nit2, the Nit1-like domain of the invertebrate NitFhit, and various uncharacterized bacterial and archaeal Nit-like proteins. Nit1 and Nit2 are candidate tumor suppressor proteins. In NitFhit, the Nit1-like domain is encoded as a fusion protein with the non-homologous tumor suppressor, fragile histidine triad (Fhit). Mammalian Nit1 and Fhit may affect distinct signal pathways, and both may participate in DNA damage-induced apoptosis. Nit1 is a negative regulator in T cells. Overexpression of Nit2 in HeLa cells leads to a suppression of cell growth through cell cycle arrest in G2. These Nit proteins and the Nit1-like domain of NitFhit belong 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), this subgroup corresponds to class 10. Length = 265

 Score = 60.5 bits (148), Expect = 1e-09
 Identities = 43/179 (24%), Positives = 78/179 (43%), Gaps = 17/179 (9%)

Query: 6   KIAIAQLNPVVGDIAGNIAKARRAREEANRQGMDLILFTELFISGYPPEDLVFKKSFIQA 65
           ++A+ Q+     D   N+A+A+   EEA  QG  L++  E F      +      +  + 
Sbjct: 1   RVALIQMT-STADKEANLARAKELIEEAAAQGAKLVVLPECFNYPGGTDAFKLALAEEEG 59

Query: 66  CSSAIDTLKSDTHDGGAGIVVG-FPRQDQEG--VLN-SVVILDAGNIIAVRDKI-----N 116
               +  L     + G  +V G  P +D +   V N S+V    G ++A   KI     +
Sbjct: 60  DGPTLQALSELAKEHGIWLVGGSIPERDDDDGKVYNTSLVFDPDGELVARYRKIHLFDVD 119

Query: 117 LPNYSEFHEKRTFISGYSNDPIVFRDI---RLGILICEDIWKNSNICKHLKKQGAEFLF 172
           +P    + E  T   G  ++ +V  D    ++G+ IC D+ +   + + L +QGA+ L 
Sbjct: 120 VPGGISYRESDTLTPG--DEVVVV-DTPFGKIGLGICYDL-RFPELARALARQGADILT 174