GMPR

gene
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Also known as GMPR1hGMPR-I

Summary

GMPR (guanosine monophosphate reductase, HGNC:4376) is a protein-coding gene on chromosome 6p22.3, encoding GMP reductase 1 (P36959). Catalyzes the irreversible NADPH-dependent deamination of GMP to IMP.

This gene encodes an enzyme that catalyzes the irreversible and NADPH-dependent reductive deamination of GMP to IMP. The protein also functions in the re-utilization of free intracellular bases and purine nucleosides.

Source: NCBI Gene 2766 — RefSeq curated summary.

At a glance

  • GWAS associations: 53
  • Clinical variants (ClinVar): 80 total — 1 likely-pathogenic
  • MANE Select transcript: NM_006877

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:4376
Approved symbolGMPR
Nameguanosine monophosphate reductase
Location6p22.3
Locus typegene with protein product
StatusApproved
AliasesGMPR1, hGMPR-I
Ensembl geneENSG00000137198
Ensembl biotypeprotein_coding
OMIM139265
Entrez2766

Gene structure

Transcript identifiers

Ensembl transcripts: 13 — 10 protein_coding, 2 protein_coding_CDS_not_defined, 1 retained_intron

ENST00000259727, ENST00000540478, ENST00000543191, ENST00000544145, ENST00000864757, ENST00000864758, ENST00000864759, ENST00000864760, ENST00000864761, ENST00000967431, ENST00000967432, ENST00000967433, ENST00000967434

RefSeq mRNA: 1 — MANE Select: NM_006877 NM_006877

CCDS: CCDS4537

Canonical transcript exons

ENST00000259727 — 9 exons

ExonStartEnd
ENSE000009287281627878416278890
ENSE000009287301625456216254735
ENSE000009287311625028416250367
ENSE000009287321624684216246961
ENSE000009287331623858716238780
ENSE000017900431627441516274496
ENSE000022069691629500616295549
ENSE000035125551629046216290621
ENSE000035232901628579316285835

Expression profiles

Bgee: expression breadth ubiquitous, 249 present calls, max score 98.90.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 10.8152 / max 321.6295, expressed in 1389 samples.

FANTOM5 promoters (4 alternative TSS)

Promoter IDTPM avgSamples expressed
6609010.81521389
660921.6579730
660890.214372
660950.118850

Top tissues by expression

293 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
gastrocnemiusUBERON:000138898.90gold quality
hindlimb stylopod muscleUBERON:000425298.66gold quality
apex of heartUBERON:000209898.51gold quality
muscle of legUBERON:000138398.19gold quality
right uterine tubeUBERON:000130298.11gold quality
muscle organUBERON:000163097.60gold quality
skeletal muscle tissue of rectus abdominisUBERON:000451197.07gold quality
heart left ventricleUBERON:000208496.62gold quality
skeletal muscle tissueUBERON:000113496.29gold quality
cardiac ventricleUBERON:000208296.23gold quality
right testisUBERON:000453496.10gold quality
vastus lateralisUBERON:000137996.02gold quality
right atrium auricular regionUBERON:000663196.01gold quality
quadriceps femorisUBERON:000137795.92gold quality
left testisUBERON:000453395.82gold quality
biceps brachiiUBERON:000150795.54gold quality
deltoidUBERON:000147695.34gold quality
triceps brachiiUBERON:000150995.30gold quality
skeletal muscle tissue of biceps brachiiUBERON:000450294.63gold quality
cardiac atriumUBERON:000208194.15gold quality
heartUBERON:000094894.08gold quality
gluteal muscleUBERON:000200093.81gold quality
testisUBERON:000047393.66gold quality
tibialis anteriorUBERON:000138593.64silver quality
left ovaryUBERON:000211993.45gold quality
diaphragmUBERON:000110393.38gold quality
monocyteCL:000057693.33gold quality
ascending aortaUBERON:000149693.10gold quality
thoracic aortaUBERON:000151593.05gold quality
right ovaryUBERON:000211892.82gold quality

Single-cell (SCXA)

Detected in 16 experiment(s), a significant marker in 14.

ExperimentMarker?Max mean expression
E-ENAD-20yes372.94
E-GEOD-75367yes366.97
E-MTAB-7052yes44.51
E-CURD-112yes32.09
E-HCAD-4yes30.45
E-HCAD-6yes26.85
E-MTAB-9221yes23.10
E-CURD-122yes20.62
E-MTAB-9067yes10.67
E-MTAB-6701yes10.53
E-HCAD-9yes9.01
E-HCAD-1yes6.18
E-MTAB-9467yes3.32
E-MTAB-6075no155.32
E-MTAB-5061no3.76

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

28 targeting GMPR, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-656-3P100.0072.152788
HSA-MIR-6870-5P99.9968.552115
HSA-MIR-4723-5P99.9768.702034
HSA-MIR-569899.9768.492029
HSA-MIR-7111-5P99.9768.482062
HSA-MIR-4778-3P99.9370.401818
HSA-MIR-4668-5P99.7970.583782
HSA-MIR-117999.7168.701040
HSA-MIR-464499.3569.122514
HSA-MIR-431199.3170.473041
HSA-MIR-18A-5P99.2971.05806
HSA-MIR-18B-5P99.2971.05806
HSA-MIR-6731-5P99.2867.422375
HSA-MIR-808599.2867.562362
HSA-MIR-126499.2566.811317
HSA-MIR-452899.1869.771936
HSA-MIR-7109-5P99.1866.131057
HSA-MIR-4735-3P99.1469.85777
HSA-MIR-6760-5P98.8766.731515
HSA-MIR-76098.8166.651392
HSA-MIR-655-5P98.7465.93888
HSA-MIR-214-3P98.7168.122128
HSA-MIR-6887-5P98.5668.491295
HSA-MIR-6795-5P98.5268.511277
HSA-MIR-4722-5P98.4666.341611
HSA-MIR-4768-3P98.1666.022330
HSA-MIR-5681A97.9967.171658
HSA-MIR-296-5P97.6164.02851

Literature-anchored findings (GeneRIF, showing 2)

  • GMPR as a suppressor of melanoma invasion is downregulated at the early invasive stages of melanoma progression and whose activity inhibits melanoma cell invasion by depleting intracellular GTP pools. (PMID:24139804)
  • New biochemical insights into the dynamics of water molecules at the GMP or IMP binding site of human GMPR enzyme: A molecular dynamics study. (PMID:34368983)

Cross-species orthologs

4 orthologs

OrganismSymbolGene ID
danio_reriogmprENSDARG00000016160
mus_musculusGmprENSMUSG00000000253
rattus_norvegicusGmprENSRNOG00000017250
caenorhabditis_elegansWBGENE00017984

Paralogs (3): GMPR2 (ENSG00000100938), IMPDH1 (ENSG00000106348), IMPDH2 (ENSG00000178035)

Protein

Protein identifiers

GMP reductase 1P36959 (reviewed: P36959)

Alternative names: Guanosine 5’-monophosphate oxidoreductase 1

All UniProt accessions (1): P36959

UniProt curated annotations — full annotation on UniProt →

Function. Catalyzes the irreversible NADPH-dependent deamination of GMP to IMP. It functions in the conversion of nucleobase, nucleoside and nucleotide derivatives of G to A nucleotides, and in maintaining the intracellular balance of A and G nucleotides.

Subunit / interactions. Homotetramer.

Polymorphism. At least two different alleles are known.

Similarity. Belongs to the IMPDH/GMPR family. GuaC type 1 subfamily.

RefSeq proteins (1): NP_006868* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001093IMP_DH_GMPRtDomain
IPR005993GMPRFamily
IPR013785Aldolase_TIMHomologous_superfamily
IPR015875IMP_DH/GMP_Rdtase_CSConserved_site
IPR050139GMP_reductaseFamily

Pfam: PF00478

Enzyme classification (BRENDA):

  • EC 1.7.1.7 — GMP reductase (BRENDA: 18 organisms, 39 substrates, 64 inhibitors, 37 Km, 4 kcat entries)

Substrate kinetics (BRENDA)

7 substrates with measured Km, best-characterized 7. Km ranges are aggregated across organisms/conditions.

SubstrateKm (mM)Measurements
GMP0.0014–0.3815
NADPH0.0085–0.1212
NADP+0.05–0.423
IMP0.023–1.12
DGMP0.0151
DIMP0.141
GUANOSINE 5’-PHOSPHATE0.00551

Catalyzed reactions (Rhea), 1 shown:

  • IMP + NH4(+) + NADP(+) = GMP + NADPH + 2 H(+) (RHEA:17185)

UniProt features (57 total): strand 17, helix 17, binding site 15, turn 3, active site 2, sequence variant 2, chain 1

Structure

Experimental structures (PDB)

2 structures.

PDBMethodResolution (Å)
2BLEX-RAY DIFFRACTION1.9
2BWGX-RAY DIFFRACTION2.4

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-P36959-F197.040.95

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Catalytic / active sites (2): 186 (thioimidate intermediate); 188 (proton donor/acceptor)

Ligand- & substrate-binding residues (15): 189; 219–221; 242–243; 268–270; 269 (in other chain); 285–286 (in other chain); 286–290; 314–317; 26–27; 78 (in other chain); 129–131 (in other chain); 180–181 (in other chain) …

Function

Pathways and Gene Ontology

Reactome pathways

2 pathways

IDPathway
R-HSA-74217Purine salvage
R-HSA-9854909Regulation of MITF-M dependent genes involved in invasion

MSigDB gene sets: 208 (showing top): VERHAAK_AML_WITH_NPM1_MUTATED_DN, SHEPARD_BMYB_MORPHOLINO_UP, GOBP_RESPONSE_TO_COLD, MODULE_45, GRAESSMANN_APOPTOSIS_BY_DOXORUBICIN_DN, GOBP_ORGANOPHOSPHATE_METABOLIC_PROCESS, MODULE_16, ACEVEDO_LIVER_CANCER_WITH_H3K27ME3_UP, GOBP_NUCLEOBASE_CONTAINING_SMALL_MOLECULE_METABOLIC_PROCESS, GOBP_NUCLEOBASE_METABOLIC_PROCESS, BLALOCK_ALZHEIMERS_DISEASE_UP, MCBRYAN_PUBERTAL_BREAST_3_4WK_UP, TAKEDA_TARGETS_OF_NUP98_HOXA9_FUSION_10D_UP, MODULE_157, CCCNNNNNNAAGWT_UNKNOWN

GO Biological Process (5): purine nucleobase metabolic process (GO:0006144), purine nucleotide metabolic process (GO:0006163), response to cold (GO:0009409), purine nucleotide biosynthetic process (GO:0006164), nucleotide metabolic process (GO:0009117)

GO Molecular Function (6): GMP reductase activity (GO:0003920), metal ion binding (GO:0046872), catalytic activity (GO:0003824), IMP dehydrogenase activity (GO:0003938), protein binding (GO:0005515), oxidoreductase activity (GO:0016491)

GO Cellular Component (2): cytosol (GO:0005829), GMP reductase complex (GO:1902560)

Reactome top-level categories

Rollup of top-2 pathways:

CategoryPathways
Nucleotide salvage1
MITF-M-dependent gene expression1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
purine-containing compound metabolic process2
nucleobase metabolic process1
nucleotide metabolic process1
response to stress1
response to temperature stimulus1
purine nucleotide metabolic process1
nucleotide biosynthetic process1
purine-containing compound biosynthetic process1
nucleoside phosphate metabolic process1
oxidoreductase activity, acting on other nitrogenous compounds as donors, with NAD or NADP as acceptor1
cation binding1
molecular_function1
oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor1
binding1
catalytic activity1
cytoplasm1
cellular anatomical structure1
oxidoreductase complex1

Protein interactions and networks

STRING

2170 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
GMPRGMPSP49915667
GMPRADSLP30566588
GMPRGDAQ9Y2T3564
GMPRAPRTP07741521
GMPRADSS2P30520489
GMPRAMPD3Q01432477
GMPRMX1P20591451
GMPRGNPDA1P46926449
GMPRAMPD2Q01433448
GMPRMGST3O14880435
GMPRARHGAP6O43182425
GMPRORMDL2Q53FV1420
GMPRCADM3Q8N126420
GMPRDCAF12Q5T6F0411
GMPRATICP31939405

IntAct

6 interactions, top by confidence:

ABTypeScore
GMPR2GMPRpsi-mi:“MI:0914”(association)0.500
GMPRGMPR2psi-mi:“MI:0915”(physical association)0.500
GMPRGMPRpsi-mi:“MI:0915”(physical association)0.370
GMPR2GMPRpsi-mi:“MI:0914”(association)0.350
U2AF1MED19psi-mi:“MI:2364”(proximity)0.270

BioGRID (11): GMPR (Two-hybrid), GMPR (Affinity Capture-MS), GMPR (Affinity Capture-MS), GMPR (Positive Genetic), GMPR (Affinity Capture-MS), GMPR2 (Affinity Capture-MS), PRPS1 (Co-fractionation), ATXN2 (Co-fractionation), NOSIP (Co-fractionation), GMPR (Affinity Capture-MS), GMPR (Affinity Capture-MS)

ESM2 similar proteins: A3KN12, O88958, P21265, P21343, P30566, P36959, P38024, P50554, P50990, P54822, P61922, P78371, P80147, P80314, P80404, P82197, Q04447, Q0II59, Q259G4, Q2KIG0, Q3ZBF0, Q3ZBH0, Q3ZCI9, Q41141, Q4R4U1, Q4R5J0, Q4R5Y2, Q4R6F8, Q5E982, Q5R5F8, Q5RAP1, Q5XIM9, Q5ZMA6, Q64422, Q6EE31, Q6IA69, Q711T7, Q7XPW5, Q7ZV22, Q812E8

Diamond homologs: A0A0B5L585, A0JNA3, A8HAF6, A9A5Y7, B0TQE1, B0UXP9, B1L5U5, B5EUG3, D3ZLZ7, E9BDA8, E9PU28, F1DBB2, F6S675, F7CYY5, O00086, O14344, O42831, O50316, O58045, O67820, P0ADG7, P0ADG8, P0ADG9, P0C0H6, P0C0H7, P0DB88, P0DB89, P12268, P12269, P20839, P21620, P21879, P24547, P31002, P36959, P38697, P39567, P42851, P44334, P47996

SIGNOR signaling

6 interactions.

AEffectBMechanism
GMPR“down-regulates quantity”“guanosine 5’-monophosphate(2-)”“chemical modification”
GMPR“down-regulates quantity”NADPH(4-)“chemical modification”
GMPR“down-regulates quantity”hydron“chemical modification”
GMPR“up-regulates quantity”IMP“chemical modification”
GMPR“up-regulates quantity”ammonium“chemical modification”
GMPR“up-regulates quantity”NADP(3-)“chemical modification”

Disease & clinical

Clinical variants and AI predictions

ClinVar

80 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic1
Uncertain significance55
Likely benign1
Benign5

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
1527220GRCh37/hg19 6p24.3-22.3(chr6:8269414-17402660)Likely pathogenic

SpliceAI

2022 predictions. Top by Δscore:

VariantEffectΔscore
6:16238733:G:GTdonor_gain1.0000
6:16238795:G:GTdonor_gain1.0000
6:16246832:T:TAacceptor_gain1.0000
6:16246833:G:Aacceptor_gain1.0000
6:16246839:CA:Cacceptor_loss1.0000
6:16246840:A:AGacceptor_gain1.0000
6:16246840:AG:Aacceptor_gain1.0000
6:16246840:AGGT:Aacceptor_gain1.0000
6:16246840:AGGTG:Aacceptor_gain1.0000
6:16246841:G:GTacceptor_gain1.0000
6:16246841:GG:Gacceptor_gain1.0000
6:16246841:GGT:Gacceptor_gain1.0000
6:16246841:GGTG:Gacceptor_gain1.0000
6:16246841:GGTGG:Gacceptor_gain1.0000
6:16246960:AGGTG:Adonor_loss1.0000
6:16246961:GGTGA:Gdonor_loss1.0000
6:16246963:T:Gdonor_loss1.0000
6:16250279:TCTA:Tacceptor_loss1.0000
6:16250280:CTA:Cacceptor_loss1.0000
6:16250282:A:AGacceptor_gain1.0000
6:16250282:A:ATacceptor_loss1.0000
6:16250283:G:GGacceptor_gain1.0000
6:16250283:GC:Gacceptor_gain1.0000
6:16250283:GCA:Gacceptor_gain1.0000
6:16250363:TGCAG:Tdonor_loss1.0000
6:16250364:GCAGG:Gdonor_loss1.0000
6:16250365:CAG:Cdonor_loss1.0000
6:16250366:AG:Adonor_loss1.0000
6:16250367:GGTAC:Gdonor_loss1.0000
6:16250368:GTACG:Gdonor_loss1.0000

AlphaMissense

2265 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
6:16278834:A:CS200R1.000
6:16278836:T:AS200R1.000
6:16278836:T:GS200R1.000
6:16285797:G:AG220E1.000
6:16246916:C:AN54K0.999
6:16246916:C:GN54K0.999
6:16254574:A:CS102R0.999
6:16254576:T:AS102R0.999
6:16254576:T:GS102R0.999
6:16254651:C:GC127W0.999
6:16254667:G:TG133W0.999
6:16254668:G:AG133E0.999
6:16274418:G:TG157W0.999
6:16274419:G:AG157E0.999
6:16274419:G:TG157V0.999
6:16274423:C:AN158K0.999
6:16274423:C:GN158K0.999
6:16274452:T:CL168P0.999
6:16274480:A:CK177N0.999
6:16274480:A:TK177N0.999
6:16274491:G:AG181E0.999
6:16278792:T:CC186R0.999
6:16278794:C:GC186W0.999
6:16278814:G:AG193E0.999
6:16278819:G:AG195R0.999
6:16278819:G:CG195R0.999
6:16278820:G:AG195E0.999
6:16278838:C:AA201D0.999
6:16278849:T:CC205R0.999
6:16278851:T:GC205W0.999

dbSNP variants (sampled 300 via entrez): RS1000010469 (6:16266499 C>G,T), RS1000040631 (6:16245920 C>T), RS1000062849 (6:16266299 G>A), RS1000170012 (6:16274304 G>T), RS1000177546 (6:16269669 T>C), RS1000215132 (6:16242545 T>C), RS1000304075 (6:16263096 T>A,G), RS1000319529 (6:16276243 C>A), RS1000325570 (6:16237209 C>T), RS1000467737 (6:16261178 C>T), RS1000482108 (6:16281853 G>A), RS1000552939 (6:16292091 A>G), RS1000603296 (6:16284366 T>A), RS1000653111 (6:16288933 C>T), RS1000658204 (6:16274700 G>A)

Disease associations

OMIM: gene MIM:139265 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

53 associations (top):

StudyTraitp-value
GCST000807_11LDL cholesterol2.000000e-08
GCST001408_5Response to statins (LDL cholesterol change)5.000000e-07
GCST001601_4Gambling5.000000e-06
GCST001850_8Major depressive disorder1.000000e-06
GCST002500_54QT interval3.000000e-10
GCST004602_44Mean corpuscular volume4.000000e-43
GCST004605_28Mean corpuscular hemoglobin concentration4.000000e-27
GCST004611_86High light scatter reticulocyte count1.000000e-12
GCST004612_6High light scatter reticulocyte percentage of red cells3.000000e-15
GCST004615_28Hemoglobin concentration3.000000e-10
GCST004619_46Reticulocyte fraction of red cells6.000000e-16
GCST004619_81Reticulocyte fraction of red cells1.000000e-10
GCST004622_202Reticulocyte count3.000000e-11
GCST004622_203Reticulocyte count4.000000e-09
GCST004630_79Mean corpuscular hemoglobin2.000000e-12
GCST004630_80Mean corpuscular hemoglobin2.000000e-59
GCST005992_9Mean corpuscular hemoglobin concentration3.000000e-08
GCST005993_79Mean corpuscular hemoglobin4.000000e-18
GCST006011_111Mean corpuscular volume5.000000e-12
GCST006269_809General cognitive ability8.000000e-09
GCST010083_123Hemoglobin levels8.000000e-21
GCST010919_11QT interval3.000000e-06
GCST90002384_77Hemoglobin1.000000e-20
GCST90002385_359High light scatter reticulocyte count1.000000e-28
GCST90002385_360High light scatter reticulocyte count2.000000e-31
GCST90002385_361High light scatter reticulocyte count2.000000e-27
GCST90002386_126High light scatter reticulocyte percentage of red cells5.000000e-32
GCST90002386_149High light scatter reticulocyte percentage of red cells2.000000e-35
GCST90002386_150High light scatter reticulocyte percentage of red cells1.000000e-35
GCST90002387_318Immature fraction of reticulocytes2.000000e-09

EFO canonical traits (11, from GWAS)

EFO IDTrait name
EFO:0004611low density lipoprotein cholesterol measurement
EFO:0007804LDL cholesterol change measurement
EFO:0004699gambling behaviour
EFO:0004682QT interval
EFO:0004528mean corpuscular hemoglobin concentration
EFO:0007986reticulocyte count
EFO:0004509hemoglobin measurement
EFO:0004527mean corpuscular hemoglobin
EFO:0004337intelligence
EFO:0004305erythrocyte count
EFO:0009188Red cell distribution width

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

46 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Valproic Acidincreases expression, increases methylation, affects expression6
bisphenol Adecreases expression, increases expression2
sodium arsenitedecreases expression, increases expression2
potassium chromate(VI)affects cotreatment, decreases expression, increases expression2
Cadmium Chlorideincreases expression, decreases expression, increases abundance2
GSK-J4decreases expression1
triphenyl phosphateaffects expression1
propionaldehydeincreases expression1
kojic aciddecreases expression1
trichostatin Aaffects expression1
butyraldehydeincreases expression1
tobacco tardecreases expression1
cupric chloridedecreases expression1
nickel sulfateincreases expression1
hydroquinonedecreases expression1
S-(1,2-dichlorovinyl)cysteineaffects response to substance, increases expression1
epigallocatechin gallateaffects cotreatment, decreases expression1
pentanalincreases expression1
chromium hexavalent ionaffects expression1
entinostatincreases expression1
Scutellaria barbata extractdecreases expression1
(+)-JQ1 compoundincreases expression1
Erlotinib Hydrochloridedecreases expression1
Temozolomideincreases expression1
Sunitinibdecreases expression1
Acetaminophenaffects response to substance1
Air Pollutantsdecreases expression, increases abundance1
Air Pollutants, Occupationalincreases expression1
Aldehydesincreases expression1
Arbutindecreases expression1

Cellosaurus cell lines

2 cell lines: 2 cancer cell line

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_B1FFAbcam A-549 GMPR KO 1Cancer cell lineMale
CVCL_B2MZAbcam A-549 GMPR KO 2Cancer cell lineMale

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.