ID A0A1X1UQX3_9MYCO Unreviewed; 529 AA.
AC A0A1X1UQX3;
DT 05-JUL-2017, integrated into UniProtKB/TrEMBL.
DT 05-JUL-2017, sequence version 1.
DT 24-JAN-2024, entry version 23.
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=AWC06_17935 {ECO:0000313|EMBL:ORV59244.1};
OS Mycobacterium fragae.
OC Bacteria; Actinomycetota; Actinomycetes; Mycobacteriales; Mycobacteriaceae;
OC Mycobacterium.
OX NCBI_TaxID=1260918 {ECO:0000313|EMBL:ORV59244.1, ECO:0000313|Proteomes:UP000194000};
RN [1] {ECO:0000313|EMBL:ORV59244.1, ECO:0000313|Proteomes:UP000194000}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 45731 {ECO:0000313|EMBL:ORV59244.1,
RC ECO:0000313|Proteomes:UP000194000};
RA Tarcisio F., Conor M., Antonella G., Elisabetta G., Giulia F.S., Sara T.,
RA Anna F., Clotilde B., Roberto B., Veronica D.S., Fabio R., Monica P.,
RA Olivier J., Enrico T., Nicola S.;
RT "The new phylogeny of the genus Mycobacterium.";
RL Submitted (JAN-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 -!- 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:ORV59244.1}.
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DR EMBL; LQOW01000025; ORV59244.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1X1UQX3; -.
DR STRING; 1260918.AWC06_17935; -.
DR OrthoDB; 9805398at2; -.
DR UniPathway; UPA00601; UER00295.
DR Proteomes; UP000194000; 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:UP000194000}.
FT DOMAIN 129..185
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT DOMAIN 189..246
FT /note="CBS"
FT /evidence="ECO:0000259|PROSITE:PS51371"
FT ACT_SITE 341
FT /note="Thioimidate intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT ACT_SITE 443
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964,
FT ECO:0000256|PIRSR:PIRSR000130-1"
FT BINDING 283..285
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|PIRSR:PIRSR000130-3"
FT BINDING 283
FT /ligand="NAD(+)"
FT /ligand_id="ChEBI:CHEBI:57540"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01964"
FT BINDING 334..336
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 336
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 338
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 339
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 341
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 374..376
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 397..398
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 421..425
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 458
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 511
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 512
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 513
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 529 AA; 54758 MW; 190E1D80741CA49B CRC64;
MSSGLSRLEG NGDMIATLYG RPGGLGEDAV PTGGDDPHKV AMLGLTFDDV LLLPAASDVV
PAAADTSSQL TKKIRLKVPL VSSAMDTVTE SRMAIAMARA GGMGVLHRNL PVDEQAGQVE
TVKRSEAGMV TDPVTCRPDN TLAEVDALCA RFRISGLPVV DDAGGLVGII TNRDMRFEVD
QSKQVAEVMT KAPLITAQEG VSADAALGLL RRHKIEKLPI VDGRGRLTGL ITVKDFVKTE
QHPLATKDSD GRLLVGAAVG VGDDAWVRAM SLVDAGADVL VVDTAHAHNR LVLDMVGKLK
AEVGDRIEVV GGNVATRSGA AALVEAGADA VKVGVGPGSI CTTRVVAGVG APQITAILEA
VAVCGPAGVP VIADGGLQYS GDIAKALAAG ASTTMLGSLL AGTGEAPGEL IFVNGKQYKS
YRGMGSLAAM QGRGEAKSYS KDRYFADDAL SEDKLVPEGI EGRVPFRGPL SSVIHQLTGG
LRAAMGYTGS PTIEALQRAQ FVRITAAGLK ESHPHDITMT AEAPNYYVR
//
