>gnl|CDD|153217 cd01746, GATase1_CTP_Synthase, Type 1 glutamine amidotransferase (GATase1) domain found in Cytidine Triphosphate Synthetase. Type 1 glutamine amidotransferase (GATase1) domain found in Cytidine Triphosphate Synthetase (CTP). CTP is involved in pyrimidine ribonucleotide/ribonucleoside metabolism. CTPs produce CTP from UTP and glutamine and regulate intracellular CTP levels through interactions with four ribonucleotide triphosphates. The enzyme exists as a dimer of identical chains that aggregates as a tetramer. CTP is derived form UTP in three separate steps involving two active sites. In one active site, the UTP O4 oxygen is activated by Mg-ATP-dependent phosphorylation, followed by displacement of the resulting 4-phosphate moiety by ammonia. At a separate site, ammonia is generated via rate limiting glutamine hydrolysis (glutaminase) activity. A gated channel that spans between the glutamine hydrolysis and amidoligase active sites provides a path for ammonia diffusion. CTPs belong to the triad family of amidotransferases having a conserved Cys-His-Glu catalytic triad in the glutaminase active site. Length = 235

 Score =  360 bits (926), Expect = e-100
 Identities = 138/244 (56%), Positives = 174/244 (71%), Gaps = 10/244 (4%)

Query: 292 VKVAIVGKYIHLKDAYRSLIEALRHSGVSNYTKVQLSWIDAETLEKEDPVKHFYGVHGIL 351
           V++A+VGKY+ L DAY S++EAL+H+G++   K+++ WID+E LE+E+  +   G  GIL
Sbjct: 1   VRIALVGKYVELPDAYLSVLEALKHAGIALGVKLEIKWIDSEDLEEENAEEALKGADGIL 60

Query: 352 VPGGFGKRGSEGKIAAIKFARENKIPFLGICFGMQMAVIEAARNLAGIPNACSTEF-SEA 410
           VPGGFG RG EGKI AIK+AREN IPFLGIC GMQ+AVIE ARN+ G+P+A STEF  + 
Sbjct: 61  VPGGFGIRGVEGKILAIKYARENNIPFLGICLGMQLAVIEFARNVLGLPDANSTEFDPDT 120

Query: 411 GVPVIALMSEWMKGDQQEKRLPSDDLGATMRLGAYDVSLKEETLISRIYGLDLIPERHRH 470
             PV+ LM E     Q+       DLG TMRLGAY V LK  TL  + YG D + ERHRH
Sbjct: 121 PHPVVDLMPE-----QKGV----KDLGGTMRLGAYPVILKPGTLAHKYYGKDEVEERHRH 171

Query: 471 RYEVNVRYREKLEGCGLKFSGFSVDHALPEVVEYINHPWFIGVQYHPELKSRPLDPHPLF 530
           RYEVN  Y ++LE  GL+FSG   D  L E+VE  +HP+F+G Q+HPE KSRPL PHPLF
Sbjct: 172 RYEVNPEYVDELEEAGLRFSGTDPDGGLVEIVELPDHPFFVGTQFHPEFKSRPLKPHPLF 231

Query: 531 VSFI 534
           V F+
Sbjct: 232 VGFV 235