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Biochem Biophys Res Commun. 1991 Aug 30;179(1):183-9.

Cloning and sequencing of cDNA encoding human sepiapterin reductase--an enzyme involved in tetrahydrobiopterin biosynthesis.

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  • 1Department of Biochemistry, Nagoya University School of Medicine, Japan.

Abstract

A full-length cDNA clone for sepiapterin reductase, an enzyme involved in tetrahydrobiopterin biosynthesis, was isolated from a human liver cDNA library by plaque hybridization. The nucleotide sequence of hSPR 8-25, which contained an entire coding region of the enzyme, was determined. The clone encoded a protein of 261 amino acids with a calculated molecular mass of 28,047 daltons. The predicted amino acid sequence of human sepiapterin reductase showed a 74% identity with the rat enzyme. We further found a striking homology between human SPR and carbonyl reductase, estradiol 17 beta-dehydrogenase, and 3 beta-hydroxy-5-ene steroid dehydrogenase, especially in their N-terminal region.

PMID:
1883349
[PubMed - indexed for MEDLINE]
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