ID   IMDH1_DANRE             Reviewed;         544 AA.
AC   Q6GMG5;
DT   22-FEB-2012, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2004, sequence version 1.
DT   27-MAR-2024, entry version 132.
DE   RecName: Full=Inosine-5'-monophosphate dehydrogenase 1a {ECO:0000255|HAMAP-Rule:MF_03156};
DE            Short=IMP dehydrogenase 1a {ECO:0000255|HAMAP-Rule:MF_03156};
DE            Short=IMPD 1a {ECO:0000255|HAMAP-Rule:MF_03156};
DE            Short=IMPDH 1a {ECO:0000255|HAMAP-Rule:MF_03156};
DE            EC=1.1.1.205 {ECO:0000255|HAMAP-Rule:MF_03156};
GN   Name=impdh1a; ORFNames=si:dkey-95h12.3, zgc:91911;
OS   Danio rerio (Zebrafish) (Brachydanio rerio).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Cypriniformes;
OC   Danionidae; Danioninae; Danio.
OX   NCBI_TaxID=7955;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Tuebingen;
RX   PubMed=23594743; DOI=10.1038/nature12111;
RA   Howe K., Clark M.D., Torroja C.F., Torrance J., Berthelot C., Muffato M.,
RA   Collins J.E., Humphray S., McLaren K., Matthews L., McLaren S., Sealy I.,
RA   Caccamo M., Churcher C., Scott C., Barrett J.C., Koch R., Rauch G.J.,
RA   White S., Chow W., Kilian B., Quintais L.T., Guerra-Assuncao J.A., Zhou Y.,
RA   Gu Y., Yen J., Vogel J.H., Eyre T., Redmond S., Banerjee R., Chi J., Fu B.,
RA   Langley E., Maguire S.F., Laird G.K., Lloyd D., Kenyon E., Donaldson S.,
RA   Sehra H., Almeida-King J., Loveland J., Trevanion S., Jones M., Quail M.,
RA   Willey D., Hunt A., Burton J., Sims S., McLay K., Plumb B., Davis J.,
RA   Clee C., Oliver K., Clark R., Riddle C., Elliot D., Threadgold G.,
RA   Harden G., Ware D., Begum S., Mortimore B., Kerry G., Heath P.,
RA   Phillimore B., Tracey A., Corby N., Dunn M., Johnson C., Wood J., Clark S.,
RA   Pelan S., Griffiths G., Smith M., Glithero R., Howden P., Barker N.,
RA   Lloyd C., Stevens C., Harley J., Holt K., Panagiotidis G., Lovell J.,
RA   Beasley H., Henderson C., Gordon D., Auger K., Wright D., Collins J.,
RA   Raisen C., Dyer L., Leung K., Robertson L., Ambridge K., Leongamornlert D.,
RA   McGuire S., Gilderthorp R., Griffiths C., Manthravadi D., Nichol S.,
RA   Barker G., Whitehead S., Kay M., Brown J., Murnane C., Gray E.,
RA   Humphries M., Sycamore N., Barker D., Saunders D., Wallis J., Babbage A.,
RA   Hammond S., Mashreghi-Mohammadi M., Barr L., Martin S., Wray P.,
RA   Ellington A., Matthews N., Ellwood M., Woodmansey R., Clark G., Cooper J.,
RA   Tromans A., Grafham D., Skuce C., Pandian R., Andrews R., Harrison E.,
RA   Kimberley A., Garnett J., Fosker N., Hall R., Garner P., Kelly D., Bird C.,
RA   Palmer S., Gehring I., Berger A., Dooley C.M., Ersan-Urun Z., Eser C.,
RA   Geiger H., Geisler M., Karotki L., Kirn A., Konantz J., Konantz M.,
RA   Oberlander M., Rudolph-Geiger S., Teucke M., Lanz C., Raddatz G.,
RA   Osoegawa K., Zhu B., Rapp A., Widaa S., Langford C., Yang F.,
RA   Schuster S.C., Carter N.P., Harrow J., Ning Z., Herrero J., Searle S.M.,
RA   Enright A., Geisler R., Plasterk R.H., Lee C., Westerfield M.,
RA   de Jong P.J., Zon L.I., Postlethwait J.H., Nusslein-Volhard C.,
RA   Hubbard T.J., Roest Crollius H., Rogers J., Stemple D.L.;
RT   "The zebrafish reference genome sequence and its relationship to the human
RT   genome.";
RL   Nature 496:498-503(2013).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RG   NIH - Zebrafish Gene Collection (ZGC) project;
RL   Submitted (JUN-2004) 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:0000255|HAMAP-Rule:MF_03156}.
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:0000255|HAMAP-Rule:MF_03156};
CC   -!- COFACTOR:
CC       Name=K(+); Xref=ChEBI:CHEBI:29103; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_03156};
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:0000255|HAMAP-Rule:MF_03156}.
CC   -!- PATHWAY: Purine metabolism; XMP biosynthesis via de novo pathway; XMP
CC       from IMP: step 1/1. {ECO:0000255|HAMAP-Rule:MF_03156}.
CC   -!- SUBUNIT: Homotetramer. {ECO:0000255|HAMAP-Rule:MF_03156}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_03156}.
CC       Nucleus {ECO:0000255|HAMAP-Rule:MF_03156}.
CC   -!- SIMILARITY: Belongs to the IMPDH/GMPR family. {ECO:0000255|HAMAP-
CC       Rule:MF_03156}.
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DR   EMBL; BX927293; CAN87720.1; -; Genomic_DNA.
DR   EMBL; BC074090; AAH74090.1; -; mRNA.
DR   RefSeq; NP_001002177.1; NM_001002177.1.
DR   AlphaFoldDB; Q6GMG5; -.
DR   SMR; Q6GMG5; -.
DR   STRING; 7955.ENSDARP00000019185; -.
DR   PaxDb; 7955-ENSDARP00000091935; -.
DR   GeneID; 431724; -.
DR   KEGG; dre:431724; -.
DR   AGR; ZFIN:ZDB-GENE-040704-15; -.
DR   CTD; 431724; -.
DR   ZFIN; ZDB-GENE-040704-15; impdh1a.
DR   eggNOG; KOG2550; Eukaryota.
DR   HOGENOM; CLU_022552_2_1_1; -.
DR   InParanoid; Q6GMG5; -.
DR   OMA; LACMADY; -.
DR   OrthoDB; 166969at2759; -.
DR   PhylomeDB; Q6GMG5; -.
DR   TreeFam; TF300378; -.
DR   Reactome; R-DRE-6798695; Neutrophil degranulation.
DR   Reactome; R-DRE-73817; Purine ribonucleoside monophosphate biosynthesis.
DR   Reactome; R-DRE-9748787; Azathioprine ADME.
DR   UniPathway; UPA00601; UER00295.
DR   PRO; PR:Q6GMG5; -.
DR   Proteomes; UP000000437; Alternate scaffold 18.
DR   Proteomes; UP000000437; Chromosome 18.
DR   Bgee; ENSDARG00000042336; Expressed in retina and 18 other cell types or tissues.
DR   ExpressionAtlas; Q6GMG5; baseline.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
DR   GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR   GO; GO:0003938; F:IMP dehydrogenase activity; IBA:GO_Central.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0106387; P:'de novo' GMP biosynthetic process; IMP:ZFIN.
DR   GO; GO:0048066; P:developmental pigmentation; IMP:ZFIN.
DR   GO; GO:0001654; P:eye development; IMP:ZFIN.
DR   GO; GO:0006183; P:GTP biosynthetic process; IBA:GO_Central.
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; IPR015875; IMP_DH/GMP_Rdtase_CS.
DR   InterPro; IPR001093; IMP_DH_GMPRt.
DR   NCBIfam; TIGR01302; IMP_dehydrog; 1.
DR   PANTHER; PTHR11911:SF74; INOSINE-5'-MONOPHOSPHATE DEHYDROGENASE 1; 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.
DR   PROSITE; PS00487; IMP_DH_GMP_RED; 1.
PE   2: Evidence at transcript level;
KW   CBS domain; Cytoplasm; GMP biosynthesis; Metal-binding; NAD; Nucleus;
KW   Oxidoreductase; Potassium; Purine biosynthesis; Reference proteome; Repeat.
FT   CHAIN           1..544
FT                   /note="Inosine-5'-monophosphate dehydrogenase 1a"
FT                   /id="PRO_0000415675"
FT   DOMAIN          114..175
FT                   /note="CBS 1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   DOMAIN          179..237
FT                   /note="CBS 2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   REGION          520..544
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        331
FT                   /note="Thioimidate intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   ACT_SITE        429
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         274..276
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         324..326
FT                   /ligand="NAD(+)"
FT                   /ligand_id="ChEBI:CHEBI:57540"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         326
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:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         328
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:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         329
FT                   /ligand="IMP"
FT                   /ligand_id="ChEBI:CHEBI:58053"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         331
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:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         364..366
FT                   /ligand="IMP"
FT                   /ligand_id="ChEBI:CHEBI:58053"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         387..388
FT                   /ligand="IMP"
FT                   /ligand_id="ChEBI:CHEBI:58053"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         411..415
FT                   /ligand="IMP"
FT                   /ligand_id="ChEBI:CHEBI:58053"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         441
FT                   /ligand="IMP"
FT                   /ligand_id="ChEBI:CHEBI:58053"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         500
FT                   /ligand="K(+)"
FT                   /ligand_id="ChEBI:CHEBI:29103"
FT                   /ligand_note="ligand shared between two tetrameric
FT                   partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         501
FT                   /ligand="K(+)"
FT                   /ligand_id="ChEBI:CHEBI:29103"
FT                   /ligand_note="ligand shared between two tetrameric
FT                   partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
FT   BINDING         502
FT                   /ligand="K(+)"
FT                   /ligand_id="ChEBI:CHEBI:29103"
FT                   /ligand_note="ligand shared between two tetrameric
FT                   partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03156"
SQ   SEQUENCE   544 AA;  58693 MW;  20D7E08EB6480F01 CRC64;
     MADYLISGGT GYVPEDGLTA QQLFAIGDGL TYNDFLILPG FIDFISDEVD LTSALTRKIT
     LKTPLISSPM DTVTESSMAI AMALMGGIGI IHHNCTPEFQ ANEVRKVKKF EQGFITDPVV
     MSPRHTVGDV FEAKVRHGFS GIPVTETGKM GSKLVGIVTS RDIDFLSEKD YDRPLEESMT
     KREDLVVAPA GVTLKEANDI LQRSKKGKLP IVNDSDELVA IIARTDLKKN RDYPLASKDS
     RKQLLCGAAI GTREDDKYRL DLLMQAGVDV IVLDSSQGNS VFQISMINYI KQKYPELQVV
     GGNVVTAAQA KNLIDAGVDA LRVGMGCGSI CITQEVMACG RPQGTSVYKV AEYARRFGVP
     VIADGGIQTV GHVVKALALG ASTVMMGSLL AATTEAPGEY FFSDGVRLKK YRGMGSLDAM
     EKNNSSQKRY FSEGDKVKVA QGVSGSVQDK GSIHKFVPYL IAGIQHGCQD IGAKSLSILR
     SMMYSGELKF EKRTMSAQVE GGVHGLHSYS FLPFTRNGYI EPGSRGHPRA GPNVPSPAVT
     KHSS
//