RPSBLAST alignment for GI: 254780355 and conserved domain: cd06110
>gnl|CDD|99863 cd06110, BSuCS-II_like, Bacillus subtilis (Bs) citrate synthase (CS)-II_like. CS catalyzes the condensation of acetyl coenzyme A (AcCoA) and oxalacetate (OAA) to form citrate and coenzyme A (CoA), the first step in the citric acid cycle (TCA or Krebs cycle). 2MCS catalyzes the condensation of propionyl-coenzyme A (PrCoA) and OAA to form 2-methylcitrate and CoA during propionate metabolism. The overall CS reaction is thought to proceed through three partial reactions: 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. This group contains proteins similar to BsCS-II, the major CS of the gram-positive bacterium Bacillus subtilis. A mutation in the gene which encodes BsCS-II (citZ gene) has been described which resulted in a significant loss of CS activity, partial glutamate auxotrophy, and a sporulation deficiency, all of which are characteristic of strains defective in the Krebs cycle. Streptococcus mutans CS, found in this group, may participate in a pathway for the anaerobic biosynthesis of glutamate. This group also contains functionally uncharacterized CSs of various gram-negative bacteria. Some of the gram-negative species represented in this group have a second CS isozyme found in another group. 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.. Length = 356
Score = 307 bits (789), Expect = 3e-84
Identities = 138/367 (37%), Positives = 196/367 (53%), Gaps = 21/367 (5%)
Query: 52 CKSKITFIDGNNGILLYRGYPIEQLSEKSDFLEVCYLLLHGELANVSQQKDFNDKISRHA 111
SKI++IDG+ GIL+YRGY I L+E S F EV YLL +GEL + F +++
Sbjct: 9 ADSKISYIDGDAGILIYRGYDIHDLAENSTFEEVAYLLWNGELPTAEELDAFKAQLAAER 68
Query: 112 LLNENMSRFFMGFPSSAHPMAMLVSAVGALSSFYYSP-SGVQDLEQCVNVSLRMIAKIST 170
L + P AHPM +L +AV AL+ Y P + E + ++R+IAK+ T
Sbjct: 69 ELPAEIIDLLKLLPKDAHPMDVLRTAVSALA--LYDPEADDMSREANLRKAIRLIAKMPT 126
Query: 171 IAAMIYKYSIGQPFVYPRSDLDYASNFLHMCF-SVPCAEYQVNPLLARAMNRIFILHADH 229
I A ++ G V P DL +A+NFL+M P + ARA + ILHADH
Sbjct: 127 IVAAFHRIRNGLEPVAPDPDLSHAANFLYMLTGEKP------SEEAARAFDVALILHADH 180
Query: 230 EQNASTSTVRLAGSSGADPFACIAAGVACLGGRAHGGANEEALNMLMEIGSLERIPHYIM 289
E NAST R+ S+ +D ++ + A + L G HGGANE + ML+EIGS++ + Y+
Sbjct: 181 ELNASTFAARVVASTLSDMYSAVTAAIGALKGPLHGGANERVMKMLLEIGSVDNVAAYVK 240
Query: 290 RAKDKNDPFRIMGFGHRVYRNHDPRCRIMRETMYEVLEVTGRFNDPIAQVAIELERIALE 349
+ +IMGFGHRVY+ DPR + +RE + + TG E+ A+E
Sbjct: 241 DKLANKE--KIMGFGHRVYKTGDPRAKHLREMSRRLGKETGE------PKWYEMSE-AIE 291
Query: 350 DEYFIERKLYPNVDFYSGITLRALGFPTNLFTVLFAVARTAGWVSQWTEMIVDPSRRIGR 409
E+ L PNVDFYS LG P +LFT +FA++R +GW + E + R+ R
Sbjct: 292 QAMRDEKGLNPNVDFYSASVYYMLGIPVDLFTPIFAISRVSGWCAHILEQYFNN--RLIR 349
Query: 410 PRQLYTG 416
PR Y G
Sbjct: 350 PRAEYVG 356