ID A0A355Q2K0_9DELT Unreviewed; 491 AA. AC A0A355Q2K0; DT 07-NOV-2018, integrated into UniProtKB/TrEMBL. DT 07-NOV-2018, sequence version 1. DT 03-AUG-2022, entry version 11. DE RecName: Full=Inosine-5'-monophosphate dehydrogenase {ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|RuleBase:RU003928}; DE Short=IMP dehydrogenase {ECO:0000256|HAMAP-Rule:MF_01964}; DE Short=IMPD {ECO:0000256|HAMAP-Rule:MF_01964}; DE Short=IMPDH {ECO:0000256|HAMAP-Rule:MF_01964}; DE EC=1.1.1.205 {ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|RuleBase:RU003928}; GN Name=guaB {ECO:0000256|HAMAP-Rule:MF_01964}; GN ORFNames=DDZ97_01295 {ECO:0000313|EMBL:HBM51707.1}; OS Deltaproteobacteria bacterium. OC Bacteria; Proteobacteria; Deltaproteobacteria. OX NCBI_TaxID=2026735 {ECO:0000313|EMBL:HBM51707.1, ECO:0000313|Proteomes:UP000264235}; RN [1] {ECO:0000313|EMBL:HBM51707.1, ECO:0000313|Proteomes:UP000264235} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=UBA10388 {ECO:0000313|EMBL:HBM51707.1}; RX PubMed=30148503; DOI=.1038/nbt.4229; RA Parks D.H., Chuvochina M., Waite D.W., Rinke C., Skarshewski A., RA Chaumeil P.A., Hugenholtz P.; RT "A standardized bacterial taxonomy based on genome phylogeny substantially RT revises the tree of life."; RL Nat. Biotechnol. 36:996-1004(2018). CC -!- FUNCTION: Catalyzes the conversion of inosine 5'-phosphate (IMP) to CC xanthosine 5'-phosphate (XMP), the first committed and rate-limiting CC step in the de novo synthesis of guanine nucleotides, and therefore CC plays an important role in the regulation of cell growth. CC {ECO:0000256|HAMAP-Rule:MF_01964}. CC -!- CATALYTIC ACTIVITY: CC Reaction=H2O + IMP + NAD(+) = H(+) + NADH + XMP; Xref=Rhea:RHEA:11708, CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:57464, CC ChEBI:CHEBI:57540, ChEBI:CHEBI:57945, ChEBI:CHEBI:58053; CC EC=1.1.1.205; Evidence={ECO:0000256|HAMAP-Rule:MF_01964, CC ECO:0000256|RuleBase:RU003928}; CC -!- COFACTOR: CC Name=K(+); Xref=ChEBI:CHEBI:29103; CC Evidence={ECO:0000256|HAMAP-Rule:MF_01964}; CC -!- ACTIVITY REGULATION: Mycophenolic acid (MPA) is a non-competitive CC inhibitor that prevents formation of the closed enzyme conformation by CC binding to the same site as the amobile flap. In contrast, mizoribine CC monophosphate (MZP) is a competitive inhibitor that induces the closed CC conformation. MPA is a potent inhibitor of mammalian IMPDHs but a poor CC inhibitor of the bacterial enzymes. MZP is a more potent inhibitor of CC bacterial IMPDH. {ECO:0000256|HAMAP-Rule:MF_01964}. CC -!- PATHWAY: Purine metabolism; XMP biosynthesis via de novo pathway; XMP CC from IMP: step 1/1. {ECO:0000256|HAMAP-Rule:MF_01964, CC ECO:0000256|RuleBase:RU003928}. CC -!- SUBUNIT: Homotetramer. {ECO:0000256|HAMAP-Rule:MF_01964}. CC -!- SIMILARITY: Belongs to the IMPDH/GMPR family. CC {ECO:0000256|ARBA:ARBA00005502, ECO:0000256|HAMAP-Rule:MF_01964, CC ECO:0000256|RuleBase:RU003927}. CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_01964}. CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ CC whole genome shotgun (WGS) entry which is preliminary data. CC {ECO:0000313|EMBL:HBM51707.1}. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; DNZT01000034; HBM51707.1; -; Genomic_DNA. DR UniPathway; UPA00601; UER00295. DR Proteomes; UP000264235; Unassembled WGS sequence. DR GO; GO:0003938; F:IMP dehydrogenase activity; IEA:UniProtKB-UniRule. DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule. DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-UniRule. DR GO; GO:0006177; P:GMP biosynthetic process; IEA:UniProtKB-UniRule. DR CDD; cd00381; IMPDH; 1. DR Gene3D; 3.20.20.70; -; 1. DR HAMAP; MF_01964; IMPDH; 1. DR InterPro; IPR013785; Aldolase_TIM. DR InterPro; IPR000644; CBS_dom. DR InterPro; IPR046342; CBS_dom_sf. DR InterPro; IPR005990; IMP_DH. DR InterPro; IPR015875; IMP_DH/GMP_Rdtase_CS. DR InterPro; IPR001093; IMP_DH_GMPRt. DR PANTHER; PTHR11911; PTHR11911; 1. DR Pfam; PF00571; CBS; 2. DR Pfam; PF00478; IMPDH; 1. DR PIRSF; PIRSF000130; IMPDH; 1. DR SMART; SM00116; CBS; 2. DR SUPFAM; SSF54631; SSF54631; 1. DR TIGRFAMs; TIGR01302; IMP_dehydrog; 1. DR PROSITE; PS51371; CBS; 2. DR PROSITE; PS00487; IMP_DH_GMP_RED; 1. PE 3: Inferred from homology; KW CBS domain {ECO:0000256|ARBA:ARBA00023122, ECO:0000256|PROSITE- KW ProRule:PRU00703}; KW GMP biosynthesis {ECO:0000256|ARBA:ARBA00022749, ECO:0000256|HAMAP- KW Rule:MF_01964}; KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP- KW Rule:MF_01964}; KW NAD {ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|PIRSR:PIRSR000130-3}; KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP- KW Rule:MF_01964}; KW Potassium {ECO:0000256|ARBA:ARBA00022958, ECO:0000256|HAMAP-Rule:MF_01964}; KW Purine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01964, KW ECO:0000256|RuleBase:RU003928}. FT DOMAIN 94..149 FT /note="CBS" FT /evidence="ECO:0000259|PROSITE:PS51371" FT DOMAIN 153..212 FT /note="CBS" FT /evidence="ECO:0000259|PROSITE:PS51371" FT REGION 339..341 FT /note="IMP binding" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-2" FT REGION 362..363 FT /note="IMP binding" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-2" FT REGION 386..390 FT /note="IMP binding" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-2" FT ACT_SITE 306 FT /note="Thioimidate intermediate" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-1" FT ACT_SITE 402 FT /note="Proton acceptor" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-1" FT BINDING 249..251 FT /ligand="NAD(+)" FT /ligand_id="ChEBI:CHEBI:57540" FT /evidence="ECO:0000256|PIRSR:PIRSR000130-3" FT BINDING 249 FT /ligand="NAD(+)" FT /ligand_id="ChEBI:CHEBI:57540" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964" FT BINDING 299..301 FT /ligand="NAD(+)" FT /ligand_id="ChEBI:CHEBI:57540" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-3" FT BINDING 301 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-4" FT BINDING 303 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-4" FT BINDING 304 FT /ligand="IMP" FT /ligand_id="ChEBI:CHEBI:58053" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-2" FT BINDING 306 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-4" FT BINDING 416 FT /ligand="IMP" FT /ligand_id="ChEBI:CHEBI:58053" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964, FT ECO:0000256|PIRSR:PIRSR000130-2" FT BINDING 470 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /ligand_note="ligand shared between two tetrameric FT partners" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964" FT BINDING 471 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /ligand_note="ligand shared between two tetrameric FT partners" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964" FT BINDING 472 FT /ligand="K(+)" FT /ligand_id="ChEBI:CHEBI:29103" FT /ligand_note="ligand shared between two tetrameric FT partners" FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964" SQ SEQUENCE 491 AA; 53179 MW; 517FCAE4331004B6 CRC64; MLQNRITEGL TFDDVLLVPA YSDILPHEVS VQTRLTRHLD CNIPLLSAAM DTVTEHQVAI SMAQEGGLGV IHKNMSVEEQ AAQVDRVKRS ESGMISDPIT VEPEQPLKDA LQLMERYRIS GVPVTRGTEL VGILTNRDLR FETNLDQKVG SVMTSGRDRL VTVSPGIDLE EAKTLLHAHR IEKLLVVSEG YDLLGLITIK DIEKSRKYPN ANKDDRGRLR VGAAVSTSRD LMERTAALIS KGVDLVVLDT AHGHSSKVLQ SIRELRETFP ELEIVAGNIA TASGCEALIK AGVDAVKIGI GPGSICTTRV VAGIGVPQIT AISESASVAR RYGIPVIADG GIKYSGDIVK ALAAGADSVM IGSLFAGTAE TPGQVILYQG RRYKLYRGMG SMGAMKEGSK DRYFQNNIEE SKLVPEGIEG RVPFKGSLAE MVYQFVGGLR SGMGYTGCRN ITELQEQAQF VRITSAGLRE SHVHDVLITE EAPNYPISQV E //