RPSBLAST alignment for GI: 254780355 and conserved domain: cd06112
>gnl|CDD|99865 cd06112, citrate_synt_like_1_1, Citrate synthase (CS) catalyzes the condensation of acetyl coenzyme A (AcCoA) and oxalacetate (OAA) to form citrate and coenzyme A (CoA), the first step in the oxidative citric acid cycle (TCA or Krebs cycle). Peroxisomal CS is involved in the glyoxylate cycle. This group also includes CS proteins which functions as a 2-methylcitrate synthase (2MCS). 2MCS catalyzes the condensation of propionyl-CoA (PrCoA) and OAA to form 2-methylcitrate and CoA during propionate metabolism. This group contains proteins which functions exclusively as either a CS or a 2MCS, as well as those with relaxed specificity which have dual functions as both a CS and a 2MCS. The overall CS reaction is thought to proceed through three partial reactions and involves both closed and open conformational forms of the enzyme: a) the carbanion or equivalent is generated from AcCoA by base abstraction of a proton, b) the nucleophilic attack of this carbanion on OAA to generate citryl-CoA, and c) the hydrolysis of citryl-CoA to produce citrate and CoA. There are two types of CSs: type I CS and type II CSs. Type I CSs are found in eukarya, gram-positive bacteria, archaea, and in some gram-negative bacteria and are homodimers with both subunits participating in the active site. Type II CSs are unique to gram-negative bacteria and are homohexamers of identical subunits (approximated as a trimer of dimers). Some type II CSs are strongly and specifically inhibited by NADH through an allosteric mechanism.. Length = 373
Score = 345 bits (886), Expect = 2e-95
Identities = 156/386 (40%), Positives = 225/386 (58%), Gaps = 15/386 (3%)
Query: 42 YDPAFSSTASCKSKITFIDGNNGILLYRGYPIEQLSEKSDFLEVCYLLLHGELANVSQQK 101
Y P + + +S I++IDG NGIL YRGY IE+L+E S F EV LLL G+L ++ +
Sbjct: 1 YIPGLAGVPAAESSISYIDGKNGILEYRGYDIEELAEYSSFEEVALLLLDGDLPTAAELE 60
Query: 102 DFNDKISRHALLNENMSRFFMGFPSSAHPMAMLVSAVGALSSFYYSPSGVQDLEQCVN-- 159
+F+ ++ +H + N+ FP + HPM ML + V AL FY P V
Sbjct: 61 EFDKELRQHRRVKYNIRDMMKCFPETGHPMDMLQATVAALGMFYPKP-EVLKPNPDYIDA 119
Query: 160 VSLRMIAKISTIAAMIYKYSIGQPFVYPRSDLDYASNFLHMCFSVPCAEYQVNPLLARAM 219
++++IAK+ T+ AM + G + PR DLDYA NFL+M F + +P A+ +
Sbjct: 120 ATVKLIAKMPTLVAMWARIRNGDDPIEPRPDLDYAENFLYMLF-----GEEPDPATAKIL 174
Query: 220 NRIFILHADHEQNASTSTVRLAGSSGADPFACIAAGVACLGGRAHGGANEEALNMLMEIG 279
+ ILHA+H NAST + + GS+ ADP+A I++ + L G HGGANE+ L ML EIG
Sbjct: 175 DACLILHAEHTMNASTFSALVTGSTLADPYAVISSAIGTLSGPLHGGANEDVLEMLEEIG 234
Query: 280 SLERIPHYIMRAKDKNDPFRIMGFGHRVYRNHDPRCRIMRETMYEVLEVTGRFNDPIAQV 339
S E + Y+ + +I GFGHRVY+ DPR I+++ ++ G + ++
Sbjct: 235 SPENVKAYLDKKLANKQ--KIWGFGHRVYKTKDPRATILQKLAEDLFAKMGEL-SKLYEI 291
Query: 340 AIELERIALEDEYFIERKLYPNVDFYSGITLRALGFPTNLFTVLFAVARTAGWVSQWTEM 399
A+E+ER+ E + +YPNVDFYSGI + LG P +LFT +FAVAR AGW++ W E
Sbjct: 292 ALEVERLCE--ELLGHKGVYPNVDFYSGIVYKELGIPADLFTPIFAVARVAGWLAHWKEQ 349
Query: 400 IVDPSRRIGRPRQLYTGALKRDYVPL 425
+ D RI RP Q+Y G + R YVPL
Sbjct: 350 LGD--NRIFRPTQIYIGEIDRKYVPL 373