This gene encodes the enzyme dihydropteridine reductase, which catalyzes the NADH-mediated reduction of quinonoid dihydrobiopterin. This enzyme is an essential component of the pterin-dependent aromatic amino acid hydroxylating systems. Mutations in this gene resulting in QDPR deficiency include aberrant splicing, amino acid substitutions, insertions, or premature terminations. Dihydropteridine reductase deficiency presents as atypical phenylketonuria due to insufficient production of biopterin, a cofactor for phenylalanine hydroxylase. [provided by RefSeq, Jul 2008].
Ishii, Dutta, Wark, Hwang, Han, Trapp, Pfeiffer, Bansal: "Human myelin proteome and comparative analysis with mouse myelin." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 106, Issue 34, pp. 14605-10, (2009) (PubMed).