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  • Title: Cloning and characterization of a putative human d-2-hydroxyacid dehydrogenase in chromosome 9q.
    Author: Huang T, Yang W, Pereira AC, Craigen WJ, Shih VE.
    Journal: Biochem Biophys Res Commun; 2000 Feb 16; 268(2):298-301. PubMed ID: 10679197.
    Abstract:
    There is little information on d-isomer-specific dehydrogenases in humans. Identification of d-2-hydroxyglutaric aciduria, an inherited metabolic disorder associated with severe neurological dysfunction, highlights the role of d-isomers in human metabolism. The possibility of a defect in d-2-hydroxyglutarate dehydrogenation prompted us to employ E. coli d-2-hydroxyacid dehydrogenase cDNA to search the human expressed sequence tags database. Two human EST homologues were retrieved and sequenced. Analysis showed the two clones were identical with 1258 nucleotides encoding 248 amino acids of the putative human d-2-hydroxyacid dehydrogenase. It was highly homologous to bacterial d-2-hydroxyacid dehydrogenases (46%), d-phosphoglycerate dehydrogenase (38%), and formate dehydrogenase (36%) at the amino acid level. The gene is expressed ubiquitously in tissue, most abundantly in liver, and was mapped to chromosome 9q between markers WI-3028 and WI-93330. To our knowledge this is the first cloning and characterization of the cDNA for a human d-isomer specific NAD(+)-dependent 2-hydroxyacid dehydrogenase.
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