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HPABH4B
Chr 14GTP cyclohydrolase 1
Also known as: DYT14, DYT5, DYT5a, GCH, GTP-CH-1, GTPCH1, HPABH4B
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 cofactor required by aromatic amino acid hydroxylases as well as nitric oxide synthases. Mutations in this gene are associated with malignant hyperphenylalaninemia and dopa-responsive dystonia. Several alternatively spliced transcript variants encoding different isoforms have been described; however, not all variants give rise to a functional enzyme. [provided by RefSeq, Jul 2008]
Some data sources returned errors (3)
ensembl: Error: Ensembl fetch failed: 400 for /lookup/symbol/homo_sapiens/HPABH4B?content-type=application/json
gnomad: Error: Gene not found
omim: Error: OMIM fetch failed: 429
Population Genetics & Constraint
Constraint data not available from gnomAD.
ClinVar
No ClinVar data available.
Protein Context — Lollipop Plot
HPABH4B · protein map & ClinVar variants
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External Resources
Links to major genomics databases and tools
Clinical Trials
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