TH (Tyrosine Hydroxylase) is a Protein Coding gene. Diseases associated with TH include Segawa Syndrome, Recessive and Tyrosine Hydroxylase Deficiency. Among its related pathways are Dopamine metabolism and Metabolism. The protein encoded by TH is involved in the conversion of tyrosine to dopamine. It is the rate-limiting enzyme in the synthesis of catecholamines, hence plays a key role in the physiology of adrenergic neurons. Mutations in TH have been associated with autosomal recessive Segawa syndrome. Alternatively spliced transcript variants encoding different isoforms have been noted forTH.