Gene Gene information from NCBI Gene database.
Entrez ID 2643
Gene name GTP cyclohydrolase 1
Gene symbol GCH1
Synonyms (NCBI Gene)
DYT14DYT5DYT5aGCHGTP-CH-1GTPCH1HPABH4B
Chromosome 14
Chromosome location 14q22.2
Summary This gene encodes a member of the GTP cyclohydrolase family. The encoded protein is the first and rate-limiting enzyme in tetrahydrobiopterin (BH4) biosynthesis, catalyzing the conversion of GTP into 7,8-dihydroneopterin triphosphate. BH4 is an essential
SNPs SNP information provided by dbSNP.
49
SNP ID Visualize variation Clinical significance Consequence
rs41298440 G>A Pathogenic Intron variant, coding sequence variant, stop gained
rs41298442 T>C,G Pathogenic, uncertain-significance, likely-pathogenic Intron variant, coding sequence variant, missense variant
rs56127440 G>A,C Likely-benign, conflicting-interpretations-of-pathogenicity, uncertain-significance, benign-likely-benign Genic upstream transcript variant, coding sequence variant, missense variant
rs104894433 G>A,C,T Pathogenic Missense variant, coding sequence variant, synonymous variant, genic upstream transcript variant
rs104894434 A>G Pathogenic Missense variant, intron variant, coding sequence variant
miRNA miRNA information provided by mirtarbase database.
125
miRTarBase ID miRNA Experiments Reference
MIRT002772 hsa-miR-1-3p Microarray 15685193
MIRT018241 hsa-miR-335-5p Microarray 18185580
MIRT022842 hsa-miR-124-3p Microarray 18668037
MIRT002772 hsa-miR-1-3p Microarray;Other 15685193
MIRT024891 hsa-miR-215-5p Microarray 19074876
Gene ontology (GO) Gene Ontology (GO) annotations describing the biological processes, molecular functions, and cellular components associated with a gene.
55
GO ID Ontology Definition Evidence Reference
GO:0000166 Function Nucleotide binding IEA
GO:0003824 Function Catalytic activity IEA
GO:0003924 Function GTPase activity IDA 2463916
GO:0003934 Function GTP cyclohydrolase I activity IBA
GO:0003934 Function GTP cyclohydrolase I activity IDA 8068008, 11284739
Other IDs Other IDs provides unique identifiers for this gene in OMIM, HGNC, and Ensembl databases.
MIM HGNC e!Ensembl
600225 4193 ENSG00000131979
Protein Protein information from UniProt database.
UniProt ID Unique identifier for the protein in the UniProt database. Click to view detailed protein information.
P30793
Protein name GTP cyclohydrolase 1 (EC 3.5.4.16) (GTP cyclohydrolase I) (GTP-CH-I)
Protein function Positively regulates nitric oxide synthesis in umbilical vein endothelial cells (HUVECs). May be involved in dopamine synthesis. May modify pain sensitivity and persistence. Isoform GCH-1 is the functional enzyme, the potential function of the e
PDB 1FB1 , 6Z80 , 6Z85 , 6Z86 , 6Z87 , 6Z88 , 6Z89 , 7ALA , 7ALB , 7ALC , 7ALQ
Family and domains

Pfam

Accession ID Position in sequence Description Type
PF01227 GTP_cyclohydroI 71 249 GTP cyclohydrolase I Domain
Tissue specificity TISSUE SPECIFICITY: In epidermis, expressed predominantly in basal undifferentiated keratinocytes and in some but not all melanocytes (at protein level). {ECO:0000269|PubMed:16778797}.
Sequence
Sequence length 250
Interactions View interactions
Pathways Pathway information has different metabolic/signaling pathways associated with genes.
  KEGG  Reactome
  Folate biosynthesis
Metabolic pathways
Biosynthesis of cofactors
  Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation
Associated diseases Disease associations from ClinVar (causal & non-causal) and other databases (OMIM, Orphanet, GWAS, etc.).
44
Evidence Score: ★☆☆☆☆  Gene-disease association found in Text Mining only ★★☆☆☆  Found in Text Mining and Unknown/Other Associations ★★★☆☆  Reported in Unknown/Other Associations across ≥2 Sources ★★★★☆  ClinVar: Pathogenic/Likely Pathogenic (<5 Variants) ★★★★★  ClinVar: Pathogenic/Likely Pathogenic (≥5 Variants)
Causal Diseases associated with Pathogenic or Likely Pathogenic variants in ClinVar
Phenotype Name Clinical Significance dbSNP ID RCV Accession Evidence Score
Abnormal central motor function Likely pathogenic rs2140127157 RCV001814484
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Dystonia 5 Likely pathogenic; Pathogenic rs1594989087, rs2140041744, rs2140127425, rs2140041733, rs2140038749, rs2140073988, rs2140127278, rs2140074097, rs1296731359, rs1555362907, rs2140127551, rs2140038846, rs2140041673, rs1555358604, rs2140063480
View all (47 more)
RCV001369910
RCV001377213
RCV001382935
RCV002569017
RCV001814643
View all (66 more)
★★★★★
ClinVar: Pathogenic / Likely Pathogenic (≥5 Variants)
Dystonia, dopa-responsive, with or without hyperphenylalaninemia, autosomal recessive Pathogenic rs2140074192, rs137852633 RCV002508111
RCV002508116
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Dystonic disorder Likely pathogenic; Pathogenic rs2140063480, rs1555360050, rs1566687487 RCV003483884
RCV003483695
RCV000678472
★★★★☆
ClinVar: Pathogenic / Likely Pathogenic (<5 Variants)
Unknown / Other Associations ClinVar entries with uncertain/conflicting evidence, and associations from other databases (OMIM, Orphanet, GWAS, etc.) where the gene is not established as causal.
Phenotype Name Clinical Significance Source Evidence Score
6-Pyruvoyl-tetrahydrobiopterin synthase deficiency Conflicting classifications of pathogenicity ClinVar
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
ALZHEIMER DISEASE GWAS catalog
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
ANEMIA, SICKLE CELL Disgenet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
AUTOSOMAL DOMINANT DOPA-RESPONSIVE DYSTONIA Orphanet
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Associations from Text Mining Disease associations identified through text mining
Disease Name Disease (Merged) Source PMID Relationship Type Evidence Score
6-pyruvoyl-tetrahydropterin synthase deficiency 6-pyruvoyl-tetrahydropterin synthase deficiency CLINVAR_DG
★☆☆☆☆
Found in Text Mining only
Acute recurrent pancreatitis Pancreatitis BEFREE 19014702
★☆☆☆☆
Found in Text Mining only
Alzheimer Disease Alzheimer disease Pubtator 29432188 Associate
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Anemia Sickle Cell Sickle cell anemia Pubtator 24136375, 30031848 Associate
★☆☆☆☆
Found in Text Mining only
Anemia, Sickle Cell Anemia BEFREE 24136375, 30031848
★★☆☆☆
Found in Text Mining + Unknown/Other Associations
Anxiety Anxiety disorder Pubtator 27871051 Associate
★☆☆☆☆
Found in Text Mining only
Anxiety Anxiety Disorder HPO_DG
★☆☆☆☆
Found in Text Mining only
Anxiety Disorders Anxiety disorder Pubtator 26945673 Associate
★☆☆☆☆
Found in Text Mining only
Arteriosclerosis Arteriosclerosis BEFREE 14707037, 21969008, 29596571, 30091833
★☆☆☆☆
Found in Text Mining only
Arthritis Arthritis BEFREE 12672181
★☆☆☆☆
Found in Text Mining only