Studies on enzymes involved in DNA synthesis and thymine nucleotide formation in potato tuber slices
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概要
- 論文の詳細を見る
Activity changes of several enzymes involved in DNA synthesis were investigated in potato tuber tissue in which DNA synthesis was induced by slicing. Nucleoside phosphotransferase activity increased only slightly during aging of the tissue discs. Thymidine monophosphate (TMP) kinase activity increased about 36% after aging for 24 hr. Protein synthesis in an early stage of aging was necessary for the activity increase. A 2.7-fold increase was observed in DNA polymerase activity after aging for 36 hr. The activity increase was due to continuous synthesis of enzyme protein. In vivo examination of TMP synthetase suggests that its activity does not necessarily increase before full development of DNA synthesis. It was concluded that among the enzymes examined, TMP kinase activity may increase shortly after slicing to support a massive supply of thymidine triphosphate and the increased activity of DNA polymerase may contribute to the active synthesis of DNA in aged discs.
- 日本植物生理学会の論文
著者
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WATANABE Akira
Research Center for Advanced Science and Technology, The University of Tokyo
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Imaseki Hidemasa
Research Institute For Biochemica Regulation Faculty Of Agriculture Nagoya University
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Watanabe Akira
Research Center For Advanced Science And Technology The University Of Tokyo
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