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Identification of a cDNA encoding an isoform of human CTP synthetase
A B van Kuilenburg1, R Meinsma, P Vreken
1Academic Medical Center, University of Amsterdam, Emma Children's Hospital and Department of Clinical Chemistry, Laboratory Genetic Metabolic Diseases, PO Box 22700, 1100 DE, Amsterdam, The Netherlands. a.b.vankuilenburg@amc.uva.nl
Abstract:
A full-length cDNA clone encoding an isoform of human CTP synthetase (type II) was isolated. A 1761-nucleotide open reading frame which corresponds to a protein of 586 amino acids with a predicted molecular mass of 65678 Da was identified. The predicted protein sequence showed 74% identity with the translation product of a previously identified human CTP synthetase cDNA clone (type I). The function of the human cDNA encoding type II CTP synthetase was verified by successful complementation of the cytidine-requiring CTP synthetase deficient mutant JF618 of Escherichia coli. The gene encoding type II CTP synthetase has been localized on chromosome Xp22.