ID A0A1H2V3Q9_9GAMM Unreviewed; 494 AA.
AC A0A1H2V3Q9;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 19.
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=SAMN05443545_102314 {ECO:0000313|EMBL:SDW62957.1};
OS Aidingimonas halophila.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Oceanospirillales;
OC Halomonadaceae; Aidingimonas.
OX NCBI_TaxID=574349 {ECO:0000313|EMBL:SDW62957.1, ECO:0000313|Proteomes:UP000198500};
RN [1] {ECO:0000313|EMBL:SDW62957.1, ECO:0000313|Proteomes:UP000198500}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 19219 {ECO:0000313|EMBL:SDW62957.1,
RC ECO:0000313|Proteomes:UP000198500};
RA de Groot N.N.;
RL Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
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|ARBA:ARBA00024264,
CC ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|RuleBase:RU003928};
CC -!- COFACTOR:
CC Name=K(+); Xref=ChEBI:CHEBI:29103;
CC Evidence={ECO:0000256|ARBA:ARBA00001958,
CC 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 ---------------------------------------------------------------------------
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; FNNI01000002; SDW62957.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1H2V3Q9; -.
DR STRING; 574349.SAMN05443545_102314; -.
DR UniPathway; UPA00601; UER00295.
DR Proteomes; UP000198500; 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; cd04601; CBS_pair_IMPDH; 1.
DR CDD; cd00381; IMPDH; 1.
DR Gene3D; 3.20.20.70; Aldolase class I; 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 NCBIfam; TIGR01302; IMP_dehydrog; 1.
DR PANTHER; PTHR11911:SF111; INOSINE-5'-MONOPHOSPHATE DEHYDROGENASE; 1.
DR PANTHER; PTHR11911; INOSINE-5-MONOPHOSPHATE DEHYDROGENASE RELATED; 1.
DR Pfam; PF00571; CBS; 2.
DR Pfam; PF00478; IMPDH; 1.
DR PIRSF; PIRSF000130; IMPDH; 1.
DR SMART; SM00116; CBS; 2.
DR SMART; SM01240; IMPDH; 1.
DR SUPFAM; SSF54631; CBS-domain pair; 1.
DR SUPFAM; SSF51412; Inosine monophosphate dehydrogenase (IMPDH); 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|ARBA:ARBA00023027, ECO:0000256|HAMAP-Rule:MF_01964};
KW Oxidoreductase {ECO:0000256|HAMAP-Rule:MF_01964,
KW ECO:0000256|RuleBase:RU003927};
KW Potassium {ECO:0000256|ARBA:ARBA00022958, ECO:0000256|HAMAP-Rule:MF_01964};
KW Purine biosynthesis {ECO:0000256|ARBA:ARBA00022755, ECO:0000256|HAMAP-
KW Rule:MF_01964}; Reference proteome {ECO:0000313|Proteomes:UP000198500}.
FT DOMAIN 98..153
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT DOMAIN 157..218
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT ACT_SITE 309
FT /note="Thioimidate intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT ACT_SITE 407
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT BINDING 252..254
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|PIRSR:PIRSR000130-3"
FT BINDING 252
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 302..304
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 304
FT /ligand="K(+)"
FT /ligand_id="ChEBI:CHEBI:29103"
FT /ligand_note="ligand shared between two tetrameric
FT partners"
FT /note="in other chain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-4"
FT BINDING 306
FT /ligand="K(+)"
FT /ligand_id="ChEBI:CHEBI:29103"
FT /ligand_note="ligand shared between two tetrameric
FT partners"
FT /note="in other chain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-4"
FT BINDING 307
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 309
FT /ligand="K(+)"
FT /ligand_id="ChEBI:CHEBI:29103"
FT /ligand_note="ligand shared between two tetrameric
FT partners"
FT /note="in other chain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-4"
FT BINDING 342..344
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 365..366
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 389..393
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 422
FT /ligand="IMP"
FT /ligand_id="ChEBI:CHEBI:58053"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 476
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 477
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 478
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 494 AA; 52217 MW; C7F910C85D1A1378 CRC64;
MGVAAMLRMA QEALTFDDVL LVPGYSDVLP KDVSLKSRLT RNLELNIPLV SSAMDTVTEA
RLAIAMAQEG GIGIVHKSMT IAGQAAEVRK VKKHESVIVK DPVTVGPKAK LQDLLAMADE
YGYSGFPVVE GDALVGIVTG RDMRFQPDHS DSVEAIMTPR DQLVTVPVGT SLEVIKGKMQ
ESRIEKILIV DDDFHLHGLV TVRDIEKAKT YPHAAKDSDG RLLVGAAVGT GPETPERIAA
LVEAGVDVIV VDTAHGHSRG VIDRVAWVKE HYPDVQVIGG NIATADAARD LAKAGADGVK
VGIGPGSICT TRVVAGVGVP QVTAVANVAE ALKEYDVPLI ADGGIRFSGD LAKAIAAGAS
CVMVGGLLAG TEEAPGEIEL YQGRTYKAYR GMGSMGAMAQ TQGSADRYFQ DKDAGAEKLV
PEGIEGRVPY KGVMSAIVHQ LMGGLRASMG YTGCRDIQEM RTKPEFVQIT GAGFNESHVH
DVQITKEAPN YRAG
//
