>gnl|CDD|30186 cd01999, Argininosuccinate_Synthase, Argininosuccinate synthase. The Argininosuccinate synthase is a urea cycle enzyme that catalyzes the penultimate step in arginine biosynthesis: the ATP-dependent ligation of citrulline to aspartate to form argininosuccinate, AMP and pyrophosphate . In humans, a defect in the AS gene causes citrullinemia, a genetic disease characterized by severe vomiting spells and mental retardation. AS is a homotetrameric enzyme of chains of about 400 amino-acid residues. An arginine seems to be important for the enzyme's catalytic mechanism. The sequences of AS from various prokaryotes, archaebacteria and eukaryotes show significant similarity. Length = 385

 Score = 39.7 bits (93), Expect = 0.001
 Identities = 37/128 (28%), Positives = 52/128 (40%), Gaps = 21/128 (16%)

Query: 23  VVVAMSGGVDSSVVAALLKRDGY-DVIGVTLQLYNSRKASKRKGSCCAGQ--DVYDA--R 77
           VV+A SGG+D+SV+   LK  G  +VI VT  +               GQ  +  +A   
Sbjct: 1   VVLAYSGGLDTSVILKWLKEKGGYEVIAVTADV---------------GQPEEEIEAIEE 45

Query: 78  RVCDTINVSHYVFDYEERFRNAVIVPFASSYAAGETPLPC-VDCNRTVKFSDLLSVTRQL 136
           +        H V D  E F    I P   + A  E   P      R +    L+ V ++ 
Sbjct: 46  KALKLGAKKHVVVDLREEFVEDYIFPAIQANALYEGTYPLGTALARPLIAKALVEVAKEE 105

Query: 137 GADVLATG 144
           GAD +A G
Sbjct: 106 GADAVAHG 113