PHYH

This gene is a member of the PhyH family and encodes a peroxisomal protein that is involved in the alpha-oxidation of 3-methyl branched fatty acids. Specifically, this protein converts phytanoyl-CoA to 2-hydroxyphytanoyl-CoA. Mutations in this gene have been associated with Refsum disease (RD) and deficient protein activity has been associated with Zellweger syndrome and rhizomelic chondrodysplasia punctata. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq]

phytanoyl-CoA 2-hydroxylase

Catalyzes the 2-hydroxylation of not only racemic phytanoyl-CoA and the isomers of 3-methylhexadecanoyl-CoA, but also a variety of other mono-branched 3-methylacyl-CoA esters (with a chain length of at least seven carbon atoms) and straight-chain acyl-CoA esters (with a chain length longer than four carbon atoms) (PubMed:9326939, PubMed:10744784, PubMed:12031666, PubMed:12923223).
Does not hydroxylate long and very long straight chain acyl-CoAs or 2-methyl- and 4-methyl-branched acyl-CoAs (PubMed:10744784, PubMed:12923223).

2-oxobutyrate catabolic processIEA:Ensembl
2-oxoglutarate metabolic processManual Assertion Based On ExperimentIDA:CAFA
Fatty acid alpha-oxidationManual Assertion Based On ExperimentIDA:UniProtKB
Isoprenoid metabolic processManual Assertion Based On ExperimentIDA:UniProtKB
Methyl-branched fatty acid metabolic processManual Assertion Based On ExperimentIDA:UniProtKB

Peroxisome

Refsum disease (RD):
A rare autosomal recessive peroxisomal disorder characterized by the accumulation of the branched-chain fatty acid, phytanic acid, in blood and tissues. Cardinal clinical features are retinitis pigmentosa, peripheral neuropathy, cerebellar ataxia, and elevated protein levels in the cerebrospinal fluid (CSF). Half of all patients exhibit generalized, mild to moderate ichthyosis resembling ichthyosis vulgaris. Less constant features are nerve deafness, anosmia, skeletal abnormalities, cataracts and cardiac impairment.