| Literature DB >> 2896620 |
S Fujimori1, Y Hidaka, B L Davidson, T D Palella, W N Kelley.
Abstract
HPRT Ann Arbor is a variant of hypoxanthine (guanine) phosphoribosyl-transferase (HPRT: EC 2.4.2.8), which was identified in wo brothers with hyperuricemia and nephrolithiasis. In previous studies, this mutant enzyme was characterized by an increased Km for both substrates, a normal Vmax, a decreased intracellular concentration of enzyme protein, a normal subunit molecular weight and an acidic isoelectric point under native isoelectric focusing conditions. We have cloned a full-length cDNA for HPRT Ann Arbor and determined its complete nucleotide sequence. A single nucleotide change (T----G) at nucleotide position 396 has been identified. This transversion predicts an amino acid substitution from isoleucine (ATT) to methionine (ATG) in codon 132, which is located within the putative 5'-phosphoribosyl-1-pyrophosphate (PRPP)-binding site of HPRT.Entities:
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Year: 1988 PMID: 2896620 DOI: 10.1007/bf00291707
Source DB: PubMed Journal: Hum Genet ISSN: 0340-6717 Impact factor: 4.132