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Co-purification of thymidylate kinase and cytosolic thymidine kinase from human term placenta by affinity chromatography.
Tamiya, N; Yusa, T; Yamaguchi, Y; Tsukifuji, R; Kuroiwa, N; Moriyama, Y; Fujimura, S.
Afiliação
  • Tamiya N; Department of Surgery, Chiba University School of Medicine, Japan.
Biochim Biophys Acta ; 995(1): 28-35, 1989 Mar 16.
Article em En | MEDLINE | ID: mdl-2538159
It was revealed that thymidylate kinase was purified together with cytosolic thymidine kinase from human term placenta by p-aminophenyl thymidine-3'-phosphate-CH-Sepharose affinity column chromatography, which has been commonly used for purification of thymidine kinase. In addition, it was noted that mitochondrial thymidine kinase and nucleoside diphosphate kinase were concurrently eliminated. In the presence of ATP, cytosolic thymidine kinase and thymidylate kinase could be separated from each other by Ultrogel AcA 34 filtration, and their molecular weights were estimated to be 70,000 and 50,000, respectively. On SDS-polyacrylamide gel electrophoresis, thymidine kinase protein exhibited a band of 26,000, which was compatible with the molecular weight of the enzyme subunit calculated from its cDNA, while thymidylate kinase protein showed 24,000. Thymidylate kinase could utilize either ATP or dATP as an efficient phosphate donor, and showed substrate specificity for dTMP.
Assuntos
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Base de dados: MEDLINE Assunto principal: Fosfotransferases / Placenta / Timidina Quinase / Núcleosídeo-Fosfato Quinase Limite: Humans Idioma: En Ano de publicação: 1989 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Assunto principal: Fosfotransferases / Placenta / Timidina Quinase / Núcleosídeo-Fosfato Quinase Limite: Humans Idioma: En Ano de publicação: 1989 Tipo de documento: Article