Gene Association: PCBD1
UniProt Search:
PCBD1 (PROTEIN_CODING)
Function Description: pterin-4 alpha-carbinolamine dehydratase 1
found 9 associated metabolites with current gene based on the text mining result from the pubmed database.
Dihydrobiopterin
Dihydrobiopterin, also known as BH2, 7,8-dihydrobiopterin, L-erythro-7,8-dihydrobiopterin, quinonoid dihydrobiopterin or q-BH2, belongs to the class of organic compounds known as biopterins and derivatives. These are coenzymes containing a 2-amino-pteridine-4-one derivative. Dihydrobiopterin is also classified as a pteridine. Pteridines are aromatic compounds composed of fused pyrimidine and pyrazine rings. Dihydrobiopterin is produced during the synthesis of neurotransmitters L-DOPA, dopamine, norepinephrine and epinephrine. It is restored to the required cofactor tetrahydrobiopterin via the NADPH-dependant reduction of dihydrobiopterin reductase. Dihydrobiopterin can also be converted to tetrahydrobiopterin by nitric oxide synthase (NOS) which is catalyzed by the flavoprotein "diaphorase" activity of NOS. This activity is located on the reductase (C-terminal) domain of NOS, whereas the high affinity tetrahydrobiopterin site involved in NOS activation is located on the oxygenase (N-terminal) domain (PMID: 8626754). Sepiapterin reductase (SPR) is another enzyme that plays a role in the production of dihydrobiopterin. SPR catalyzes the reduction of sepiapterin to dihydrobiopterin (BH2), the precursor for tetrahydrobiopterin (BH4). BH4 is a cofactor critical for nitric oxide biosynthesis and alkylglycerol and aromatic amino acid metabolism (PMID: 25550200). Dihydrobiopterin is known to be synthesized in several parts of the body, including the pineal gland. Dihydrobiopterin exists in all eukaryotes, ranging from yeast to humans. In humans, dihydrobiopterin is involved in several metabolic disorders including dihydropteridine reductase (DHPR) deficiency. DHPR deficiency is a severe form of hyperphenylalaninemia (HPA) due to impaired regeneration of tetrahydrobiopterin (BH4) leading to decreased levels of neurotransmitters (dopamine, serotonin) and folate in cerebrospinal fluid, and causing neurological symptoms such as psychomotor delay, hypotonia, seizures, abnormal movements, hypersalivation, and swallowing difficulties. Dihydrobiopterin is also associated with another metabolic disorder known as sepiapterin reductase deficiency (SRD). Sepiapterin reductase catalyzes the (NADP-dependent) reduction of carbonyl derivatives, including pteridines, and plays an important role in tetrahydrobiopterin biosynthesis. Low dihydrofolate reductase activity in the brain leads to the accumulation of dihydrobiopterin, which in turn, inhibits tyrosine and tryptophan hydroxylases. This uncouples neuronal nitric oxide synthase, leading to neurotransmitter deficiencies and neuronal cell death. SRD is characterized by low cerebrospinal fluid neurotransmitter levels and the presence of elevated cerebrospinal fluid dihydrobiopterin. SRD is characterized by motor delay, axial hypotonia, language delay, diurnal fluctuation of symptoms, dystonia, weakness, oculogyric crises, dysarthria, parkinsonian signs and hyperreflexia. Dihydrobiopterin (BH2) is an oxidation product of tetrahydrobiopterin. Tetrahydrobiopterin is a natural occurring cofactor of the aromatic amino acid hydroxylase and is involved in the synthesis of tyrosine and the neurotransmitters dopamine and serotonin. Tetrahydrobiopterin is also essential for nitric oxide synthase catalyzed oxidation of L-arginine to L-citrulline and nitric oxide. [HMDB] 7,8-Dihydro-L-biopterin is an oxidation product of tetrahydrobiopterin.
3,5,5-Trimethyl-2-cyclohexen-1-one
3,5,5-Trimethyl-2-cyclohexen-1-one is found in fruits. 3,5,5-Trimethyl-2-cyclohexen-1-one is a flavouring ingredient. 3,5,5-Trimethyl-2-cyclohexen-1-one is present in cranberries (Vaccinium microcarpa) and saffron (Crocus sativus 3,5,5-Trimethyl-2-cyclohexen-1-one is a flavouring ingredient. It is present in cranberries (Vaccinium microcarpa) and saffron (Crocus sativus), as well as in other herbs and spices. CONFIDENCE Reference Standard (Level 1); NaToxAq - Natural Toxins and Drinking Water Quality - From Source to Tap (https://natoxaq.ku.dk) CONFIDENCE Reference Standard (Level 1); INTERNAL_ID 2336 CONFIDENCE standard compound; INTERNAL_ID 2507
Pterin
Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; Pterin is a heterocyclic compound composed of a pyrazine ring and a pyrimidine ring (a pteridine ring system); the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. As a group, pterins are compounds that are derivatives of 2-amino-4-oxopteridine, with additional functional groups attached to the pyrazine ring.; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia. Pterin is found in soy bean. Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia.
4a-Hydroxytetrahydrobiopterin
Tetrahydrobiopterin (BH4) is essential for catalyzing the conversion of phenylalanine into tyrosine by phenylalanine hydroxylase. During this physiological reaction, the oxidation of BH4 creates 4a-hydroxytetrahydropterin (CAS: 70110-58-6) intermediates and hydrogen peroxide is formed. The hydrogen peroxide and the hydroxytetrahydropterin can both be derived from alternate breakdown routes of a common precursor, the corresponding 4a-hydroperoxytetrahydropterin (PMID: 8323303). Tetrahydrobiopterin (BH4) is essential to catalyze the conversion of phenylalanine to tyrosine by phenylalanine hydroxylase. During this physiological reaction, the oxidation of BH4 creates 4a-hydroxytetrahydropterin intermediates and hydrogen peroxide is formed. The hydrogen peroxide and the hydroxytetrahydropterin can both derive from alternate routes of breakdown of a common precursor, the corresponding 4a-hydroperoxytetrahydropterin. (PMID 8323303) [HMDB]
dihydrobiopterin
7,8-Dihydro-L-biopterin is an oxidation product of tetrahydrobiopterin.
ISOPHORONE
A cyclic ketone, the structure of which is that of cyclohex-2-en-1-one substituted by methyl groups at positions 3, 5 and 5.
