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Protein

Inosine-5'-monophosphate dehydrogenase

Gene
N/A
Organism
Trypanosoma brucei brucei
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

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 annotation

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
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 bindingi320Potassium; via carbonyl oxygenUniRule annotation1
Metal bindingi322Potassium; via carbonyl oxygenUniRule annotation1
Binding sitei323IMPUniRule annotation1
Active sitei325Thioimidate intermediateUniRule annotation1
Metal bindingi325Potassium; via carbonyl oxygenUniRule annotation1
Active sitei423Proton acceptorUniRule annotation1
Binding sitei435IMPUniRule annotation1
Metal bindingi494Potassium; via carbonyl oxygen; shared with tetrameric partnerUniRule annotation1
Metal bindingi495Potassium; via carbonyl oxygen; shared with tetrameric partnerUniRule annotation1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Nucleotide bindingi268 – 270NADUniRule annotation3
Nucleotide bindingi318 – 320NADUniRule annotation3

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

GMP biosynthesis, Purine biosynthesis

Keywords - Ligandi

Metal-binding, NAD, Potassium

Enzyme and pathway databases

BRENDAi1.1.1.205. 6519.
UniPathwayiUPA00601; UER00295.

Names & Taxonomyi

Protein namesi
Recommended name:
Inosine-5'-monophosphate dehydrogenaseUniRule annotation (EC:1.1.1.205UniRule annotation)
Short name:
IMP dehydrogenaseUniRule annotation
Short name:
IMPDUniRule annotation
Short name:
IMPDHUniRule annotation
OrganismiTrypanosoma brucei brucei
Taxonomic identifieri5702 [NCBI]
Taxonomic lineageiEukaryotaEuglenozoaKinetoplastidaTrypanosomatidaeTrypanosoma

Subcellular locationi

  • Glycosome UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Glycosome, Peroxisome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000936771 – 512Inosine-5'-monophosphate dehydrogenaseAdd BLAST512

Proteomic databases

PRIDEiP50098.

Interactioni

Subunit structurei

Homotetramer.UniRule annotation

Structurei

3D structure databases

ProteinModelPortaliP50098.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini110 – 169CBS 1UniRule annotationAdd BLAST60
Domaini173 – 231CBS 2UniRule annotationAdd BLAST59

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni358 – 360IMP bindingUniRule annotation3
Regioni381 – 382IMP bindingUniRule annotation2
Regioni405 – 409IMP bindingUniRule annotation5

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi510 – 512Microbody targeting signalUniRule annotation3

Sequence similaritiesi

Belongs to the IMPDH/GMPR family.UniRule annotation
Contains 2 CBS domains.UniRule annotation

Keywords - Domaini

CBS domain, Repeat

Family and domain databases

CDDicd00381. IMPDH. 1 hit.
Gene3Di3.20.20.70. 1 hit.
HAMAPiMF_01964. IMPDH. 1 hit.
InterProiIPR013785. Aldolase_TIM.
IPR000644. CBS_dom.
IPR005990. IMP_DH.
IPR015875. IMP_DH/GMP_Rdtase_CS.
IPR001093. IMP_DH_GMPRt.
[Graphical view]
PANTHERiPTHR11911:SF6. PTHR11911:SF6. 2 hits.
PfamiPF00571. CBS. 2 hits.
PF00478. IMPDH. 1 hit.
[Graphical view]
PIRSFiPIRSF000130. IMPDH. 1 hit.
SMARTiSM00116. CBS. 2 hits.
[Graphical view]
TIGRFAMsiTIGR01302. IMP_dehydrog. 1 hit.
PROSITEiPS51371. CBS. 2 hits.
PS00487. IMP_DH_GMP_RED. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P50098-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MENTNLRTKT LRDGTTAEEL FSQDGLSFND FIILPGFIDF DSSKVNVSGQ
60 70 80 90 100
FTKNILLHLP LVSSPMDTVT ESSMARAMAL MGGIGVIHNN CTVEQQARMV
110 120 130 140 150
RSVKLYRNGF IMKPKSVSPD VPVSTIRNIK SEKGISGILV TEGGKYDGKL
160 170 180 190 200
LGIVCTKDID FVKDASAPVS QYMTRRENMT VERYPIKLEE AMDVLNRSRH
210 220 230 240 250
GYLPVLNDKD EVVCLCSRRD AVRARDYPNS SLDRNGHLLC AAATSTREAD
260 270 280 290 300
KGRVAALSEA GIDVLVLDSS QGNTIYQVSF IRWVKKTYPH LEVVAGNVVT
310 320 330 340 350
QDQAKNLIDA GADSLRIGMG SGSICITQEV LACGRPQATA IYKVARYAAS
360 370 380 390 400
RGVPCVADGG LRNVGDVCKA LAVGANVAML GSMIAGTSET PGEYFFKDGM
410 420 430 440 450
RLKGYRGMGS IDAMLQGRES GKRYLSENET LQVAQGVAGA VLDKGSVLKL
460 470 480 490 500
LAYIHKGLQQ SAQDIGEVSF DAIREKVYEG QVLFNRRTLT AQSEGAVHSL
510
HHYERKLFAS KL
Length:512
Mass (Da):55,709
Last modified:October 1, 1996 - v1
Checksum:i1A86C46AE6445045
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M97794 Genomic DNA. Translation: AAB46420.1.
PIRiA55407.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M97794 Genomic DNA. Translation: AAB46420.1.
PIRiA55407.

3D structure databases

ProteinModelPortaliP50098.
ModBaseiSearch...
MobiDBiSearch...

Proteomic databases

PRIDEiP50098.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayiUPA00601; UER00295.
BRENDAi1.1.1.205. 6519.

Family and domain databases

CDDicd00381. IMPDH. 1 hit.
Gene3Di3.20.20.70. 1 hit.
HAMAPiMF_01964. IMPDH. 1 hit.
InterProiIPR013785. Aldolase_TIM.
IPR000644. CBS_dom.
IPR005990. IMP_DH.
IPR015875. IMP_DH/GMP_Rdtase_CS.
IPR001093. IMP_DH_GMPRt.
[Graphical view]
PANTHERiPTHR11911:SF6. PTHR11911:SF6. 2 hits.
PfamiPF00571. CBS. 2 hits.
PF00478. IMPDH. 1 hit.
[Graphical view]
PIRSFiPIRSF000130. IMPDH. 1 hit.
SMARTiSM00116. CBS. 2 hits.
[Graphical view]
TIGRFAMsiTIGR01302. IMP_dehydrog. 1 hit.
PROSITEiPS51371. CBS. 2 hits.
PS00487. IMP_DH_GMP_RED. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiIMDH_TRYBB
AccessioniPrimary (citable) accession number: P50098
Entry historyi
Integrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: October 1, 1996
Last modified: October 5, 2016
This is version 102 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.