ID H5S9E5_9BACT Unreviewed; 494 AA.
AC H5S9E5;
DT 18-APR-2012, integrated into UniProtKB/TrEMBL.
DT 18-APR-2012, sequence version 1.
DT 24-JAN-2024, entry version 47.
DE RecName: Full=Inosine-5'-monophosphate dehydrogenase {ECO:0000256|HAMAP-Rule:MF_01964};
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};
GN Name=guaB {ECO:0000256|HAMAP-Rule:MF_01964};
GN ORFNames=HGMM_F03C01C22 {ECO:0000313|EMBL:BAL52781.1};
OS uncultured Acidobacteriota bacterium.
OC Bacteria; Acidobacteriota; environmental samples.
OX NCBI_TaxID=171953 {ECO:0000313|EMBL:BAL52781.1};
RN [1] {ECO:0000313|EMBL:BAL52781.1}
RP NUCLEOTIDE SEQUENCE.
RX PubMed=16309394; DOI=10.1111/j.1462-2920.2005.00881.x;
RA Nunoura T., Hirayama H., Takami H., Oida H., Nishi S., Shimamura S.,
RA Suzuki Y., Inagaki F., Takai K., Nealson K.H., Horikoshi K.;
RT "Genetic and functional properties of uncultivated thermophilic
RT crenarchaeotes from a subsurface gold mine as revealed by analysis of
RT genome fragments.";
RL Environ. Microbiol. 7:1967-1984(2005).
RN [2] {ECO:0000313|EMBL:BAL52781.1}
RP NUCLEOTIDE SEQUENCE.
RA Takami H., Noguchi H., Takaki Y., Uchiyama I., Toyoda A., Nishi S.,
RA Chee G.-J., Arai W., Nunoura T., Itoh T., Hattori M., Takai K.;
RT "A Deeply Branching Thermophilic Bacterium with an Ancient Acetyl-CoA
RT Pathway Dominates a Subsurface Ecosystem.";
RL PLoS ONE 7:e30559-e30559(2012).
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 -!- 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 -!- 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}.
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DR EMBL; AP011639; BAL52781.1; -; Genomic_DNA.
DR AlphaFoldDB; H5S9E5; -.
DR UniPathway; UPA00601; UER00295.
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; IPR005990; IMP_DH.
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; SSF51412; Inosine monophosphate dehydrogenase (IMPDH); 2.
DR PROSITE; PS51371; CBS; 2.
PE 3: Inferred from homology;
KW CBS domain {ECO:0000256|ARBA:ARBA00023122, ECO:0000256|PROSITE-
KW ProRule:PRU00703}; GMP biosynthesis {ECO:0000256|HAMAP-Rule:MF_01964};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_01964};
KW NAD {ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|PIRSR:PIRSR000130-3};
KW Oxidoreductase {ECO:0000256|HAMAP-Rule:MF_01964,
KW ECO:0000256|RuleBase:RU003927};
KW Potassium {ECO:0000256|HAMAP-Rule:MF_01964, ECO:0000256|PIRSR:PIRSR000130-
KW 4}; Purine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01964}.
FT DOMAIN 101..160
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT DOMAIN 161..219
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT ACT_SITE 313
FT /note="Thioimidate intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT ACT_SITE 409
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT BINDING 256..258
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|PIRSR:PIRSR000130-3"
FT BINDING 256
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 306..308
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 308
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 310
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 311
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 313
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 346..348
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 369..370
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 393..397
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 422
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 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; 52986 MW; 8D8264DC2E1C1A53 CRC64;
MSGQSETIPT MGLPEGLTFD DVLLIPAKSD VLPTETDTTT FFSRNVRLNI PISSAAMDTV
TEAHLAIALA QQGGIGVIHR NLSIEAQAAE VDKVKRSESG MIVDPITITP DRPISEALAM
MAHYKISGVP VVDGEGKLVG ILTNRDLRFE TRMDLRVRDV MTGRERLITA PVGTTLEDAK
VILQQHRIEK LPIVDEDFRL KGLITVKDIQ KAIKYPNAAK DHLGRLRVGA AVGATGDFLE
RAEELVRARV DVLVIDTAHG HTTRVLEAVR QLKRKFPEVD VVAGNVSTAE ATRELIAAGA
DGVKVGQGPG SICTTRVVTG AGVPQITAIM ECARAARGTG VPIIADGGIR FSGDITKAIA
AGADCVMIGS LFAGTDESPG ETILYQGRTF KTYRGMGSLG AMMAGSGDRY QQAPERGKLV
PEGVEGKVPY KGPLAVIVEQ LVGGLRAGMG YCGCRTIREL QEKARFIRIT PAGWRESHVH
DVIITKEAPN YRLE
//
