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基本情報 |
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氏名 |
池田 正五 |
氏名(カナ) |
イケダ シヨウゴ |
氏名(英語) |
Ikeda Shiyogo |
所属 |
生命科学部 生物科学科 |
職名 |
教授 |
researchmap研究者コード |
1000113908 |
researchmap機関 |
岡山理科大学 |
A mouse DNA repair enzyme (APEX nuclease) having exonuclease and apurinic/apyrimidinic endonuclease activities: purification and characterization.
Seki S, Ikeda S, Watanabe S, Hatsushika M, Tsutsui K, Akiyama K, Zhang B.
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A mouse repair enzyme having priming activity on bleomycin-damaged DNA for DNA polymerase was purified to apparent homogeneity and characterized. The enzyme extracted from permeabilized mouse ascites sarcoma (SR-C3H/He) cells with 0.2 M potassium phosphate buffer (pH 7.5) was purified by successive chromatographies on phosphocellulose, DEAE-cellulose, phosphocellulose (a second time), Sephadex G-100, single-stranded DNA cellulose and hydroxyapatite. The purified enzyme has an Mr of 34,000 as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Enzymatical studies indicated that it is a multifunctional enzyme having exonuclease, apurinic/apyrimidinic endonuclease and phosphatase activities, similar to Escherichia coli exonuclease III. This enzyme is tentatively designated as APEX nuclease for apurinic/apyrimidinic endonuclease and exonuclease activities. The amino acid composition, amino-terminal amino acid sequence and an internal amino acid sequence of APEX nuclease are determined.
Biochimica et Biophysica Acta
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