Recombinant Human PCBD1 protein

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

PCBD1 also known as pterin-4-alpha-carbinolamine dehydratase or DCOH is a bifunctional protein with a molecular weight of approximately 12 kDa. It can be found expressed in a variety of tissues with significant expression noted in the liver and kidney. PCBD1 serves a dual role functioning both in enzymatic activity and as a co-regulator in transcription processes. Its enzymatic role involves catalyzing the dehydration of 4-alpha-hydroxy-tetrahydrobiopterin (BH4) an essential cofactor in the synthesis of neurotransmitters.

Biological function summary

PCBD1 interacts with tetrahydrobiopterin metabolism participating in neurotransmitter synthesis through its dehydratase function. It also acts as a dimerization cofactor for HNF1 (HNF1A) a transcription factor critical in gene regulation. The PCBD1 protein forms dimers or tetramers indicating its capability to participate in complex formation which enhances transcriptional regulation. This regulatory activity affects several genes involved in hepatic metabolism and development.

Pathways

PCBD1 primarily influences the tetrahydrobiopterin biosynthesis pathway and the regulation of gene expression pathway via HNF1A. By facilitating neurotransmitter production it indirectly plays a role in neurological pathways specifically those related to dopamine and serotonin synthesis. Through its transcriptional co-regulation with HNF1A PCBD1 impacts glucose metabolism and pancreatic functions linking it to metabolic pathways.

Mutations or malfunctions of PCBD1 have associations with hyperphenylalaninemia a disorder affecting amino acid metabolism and with certain hyperinsulinemia forms influencing insulin regulation. Deficiencies in PCBD1 enzymatic function lead to altered levels of tetrahydrobiopterin while disruptions in its transcription co-regulation relate to impairments in glucose metabolism. Both HNF1A and PCBD1 mutations highlight their interconnected role in these conditions.