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Protein

Inosine-5'-monophosphate dehydrogenase 4

Gene

IMD4

Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth.UniRule annotation2 Publications

Miscellaneous

Present with 2970 molecules/cell in log phase SD medium.1 Publication

Catalytic activityi

Inosine 5'-phosphate + NAD+ + H2O = xanthosine 5'-phosphate + NADH.UniRule annotation

Cofactori

K+UniRule annotation

Enzyme regulationi

Mycophenolic acid (MPA) is a non-competitive inhibitor that prevents formation of the closed enzyme conformation by binding to the same site as the amobile flap. In contrast, mizoribine monophosphate (MZP) is a competitive inhibitor that induces the closed conformation. MPA is a potent inhibitor of mammalian IMPDHs but a poor inhibitor of the bacterial enzymes. MZP is a more potent inhibitor of bacterial IMPDH.UniRule annotation

Pathwayi: XMP biosynthesis via de novo pathway

This protein is involved in step 1 of the subpathway that synthesizes XMP from IMP.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. Inosine-5'-monophosphate dehydrogenase 2 (IMD2), Inosine-5'-monophosphate dehydrogenase 3 (IMD3), Inosine-5'-monophosphate dehydrogenase 4 (IMD4), Putative inosine-5'-monophosphate dehydrogenase 1 (IMD1)
This subpathway is part of the pathway XMP biosynthesis via de novo pathway, which is itself part of Purine metabolism.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes XMP from IMP, the pathway XMP biosynthesis via de novo pathway and in Purine metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi331Potassium; via carbonyl oxygenUniRule annotation1
Metal bindingi333Potassium; via carbonyl oxygenUniRule annotation1
Binding sitei334IMPUniRule annotation1
Active sitei336Thioimidate intermediateUniRule annotation1
Metal bindingi336Potassium; via carbonyl oxygenUniRule annotation1
Active sitei438Proton acceptorUniRule annotation1
Binding sitei450IMPUniRule annotation1
Metal bindingi509Potassium; via carbonyl oxygen; shared with tetrameric partnerUniRule annotation1
Metal bindingi510Potassium; via carbonyl oxygen; shared with tetrameric partnerUniRule annotation1
Metal bindingi511Potassium; via carbonyl oxygen; shared with tetrameric partnerUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi279 – 281NADUniRule annotation3
Nucleotide bindingi329 – 331NADUniRule annotation3

GO - Molecular functioni

  • IMP dehydrogenase activity Source: SGD
  • metal ion binding Source: UniProtKB-KW

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processGMP biosynthesis, Purine biosynthesis
LigandMetal-binding, NAD, Potassium

Enzyme and pathway databases

BioCyciYEAST:YML056C-MONOMER
ReactomeiR-SCE-6798695 Neutrophil degranulation
R-SCE-73817 Purine ribonucleoside monophosphate biosynthesis
R-SCE-74217 Purine salvage
UniPathwayiUPA00601; UER00295

Names & Taxonomyi

Protein namesi
Recommended name:
Inosine-5'-monophosphate dehydrogenase 4UniRule annotation (EC:1.1.1.205UniRule annotation)
Short name:
IMP dehydrogenase 4UniRule annotation
Short name:
IMPD 4UniRule annotation
Short name:
IMPDH 4UniRule annotation
Gene namesi
Name:IMD4UniRule annotation
Ordered Locus Names:YML056C
ORF Names:YM9958.06C
OrganismiSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Taxonomic identifieri559292 [NCBI]
Taxonomic lineageiEukaryotaFungiDikaryaAscomycotaSaccharomycotinaSaccharomycetesSaccharomycetalesSaccharomycetaceaeSaccharomyces
Proteomesi
  • UP000002311 Componenti: Chromosome XIII

Organism-specific databases

EuPathDBiFungiDB:YML056C
SGDiS000004520 IMD4

Subcellular locationi

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000936841 – 524Inosine-5'-monophosphate dehydrogenase 4Add BLAST524

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei125PhosphoserineCombined sources1

Keywords - PTMi

Phosphoprotein

Proteomic databases

MaxQBiP50094
PaxDbiP50094
PRIDEiP50094

PTM databases

iPTMnetiP50094

Interactioni

Subunit structurei

Homotetramer. Seems to be able to form heterotetramers composed from more than 1 of the 3 IMPDH gene products (IMD2-4).UniRule annotation1 Publication

Binary interactionsi

Show more details

Protein-protein interaction databases

BioGridi35111, 115 interactors
DIPiDIP-6458N
IntActiP50094, 89 interactors
MINTiP50094
STRINGi4932.YML056C

Structurei

3D structure databases

ProteinModelPortaliP50094
SMRiP50094
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini122 – 183CBS 1UniRule annotationAdd BLAST62
Domaini185 – 241CBS 2UniRule annotationAdd BLAST57

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni369 – 371IMP bindingUniRule annotation3
Regioni392 – 393IMP bindingUniRule annotation2
Regioni416 – 420IMP bindingUniRule annotation5

Sequence similaritiesi

Belongs to the IMPDH/GMPR family.UniRule annotation

Keywords - Domaini

CBS domain, Repeat

Phylogenomic databases

GeneTreeiENSGT00530000062923
HOGENOMiHOG000165752
KOiK00088
OMAiGIGIVHK
OrthoDBiEOG092C1U8P

Family and domain databases

CDDicd00381 IMPDH, 1 hit
Gene3Di3.20.20.70, 2 hits
HAMAPiMF_01964 IMPDH, 1 hit
InterProiView protein in InterPro
IPR013785 Aldolase_TIM
IPR000644 CBS_dom
IPR005990 IMP_DH
IPR015875 IMP_DH/GMP_Rdtase_CS
IPR001093 IMP_DH_GMPRt
PfamiView protein in Pfam
PF00571 CBS, 2 hits
PF00478 IMPDH, 1 hit
PIRSFiPIRSF000130 IMPDH, 1 hit
SMARTiView protein in SMART
SM00116 CBS, 2 hits
TIGRFAMsiTIGR01302 IMP_dehydrog, 1 hit
PROSITEiView protein in PROSITE
PS51371 CBS, 2 hits
PS00487 IMP_DH_GMP_RED, 1 hit

Sequencei

Sequence statusi: Complete.

P50094-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSAAPLDYKK ALEHLKTYSS KDGLSVQELM DSTTRGGLTY NDFLVLPGLV
60 70 80 90 100
NFPSSAVSLQ TKLTKKITLN TPFVSSPMDT VTEADMAIYM ALLGGIGFIH
110 120 130 140 150
HNCTPKEQAS MVKKVKMFEN GFINSPIVIS PTTTVGEVKV MKRKFGFSGF
160 170 180 190 200
PVTEDGKCPG KLVGLVTSRD IQFLEDDSLV VSEVMTKNPV TGIKGITLKE
210 220 230 240 250
GNEILKQTKK GKLLIVDDNG NLVSMLSRAD LMKNQNYPLA SKSATTKQLL
260 270 280 290 300
CGAAIGTIEA DKERLRLLVE AGLDVVILDS SQGNSVFQLN MIKWIKETFP
310 320 330 340 350
DLEIIAGNVA TREQAANLIA AGADGLRIGM GSGSICITQE VMACGRPQGT
360 370 380 390 400
AVYNVCQFAN QFGVPCMADG GVQNIGHITK ALALGSSTVM MGGMLAGTTE
410 420 430 440 450
SPGEYFYKDG KRLKAYRGMG SIDAMQKTGN KGNASTSRYF SESDSVLVAQ
460 470 480 490 500
GVSGAVVDKG SIKKFIPYLY NGLQHSCQDI GCESLTSLKE NVQNGEVRFE
510 520
FRTASAQLEG GVHNLHSYEK RLYN
Length:524
Mass (Da):56,394
Last modified:October 1, 1996 - v1
Checksum:iA73D1E4EFE8AEAD9
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Z46729 Genomic DNA Translation: CAA86719.1
AY899250 mRNA Translation: AAX83935.1
BK006946 Genomic DNA Translation: DAA09842.1
PIRiS50890
RefSeqiNP_013656.1, NM_001182414.1

Genome annotation databases

EnsemblFungiiYML056C; YML056C; YML056C
GeneIDi854948
KEGGisce:YML056C

Similar proteinsi

Entry informationi

Entry nameiIMDH4_YEAST
AccessioniPrimary (citable) accession number: P50094
Secondary accession number(s): D6VZB8, Q2VQW8
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: October 1, 1996
Last modified: March 28, 2018
This is version 169 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programFungal Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health