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Cyclohydrolase 1 (GCH1)
- Target
- GCH1
- Molecular classification
- Enzyme, Cyclohydrolase
01
Overview
Cyclohydrolase 1 (GTP cyclohydrolase I) is the first and rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin (BH4). BH4 is a critical cofactor for several metabolic processes, including the hydroxylation of aromatic amino acids, the production of neurotransmitters, and nitric oxide synthesis. Mutations in *GCH1* cause dopamine-responsive dystonia and other neurological disorders.
- Other names
- GTP cyclohydrolase IGCH
02
Mechanism of action
Modulation of tetrahydrobiopterin (BH4) levels, affecting neurotransmitter and nitric oxide synthesis.
03
Biological functions
Tetrahydrobiopterin biosynthesisNeurotransmitter synthesisNitric oxide synthesis
04
Disease associations
Dopamine-responsive dystoniaHyperphenylalaninemiaNeurological disorders
05
Safety considerations
Potential for off-target effects due to broad role of BH4 in multiple metabolic pathways.Variability in response to GCH1 modulators based on underlying genetic mutations.
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