Ultraviolet absorption spectrum change induced by the interaction between chloroplast coupling factor 1 and ADP or ATP
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概要
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Changes in the ultraviolet absorption spectrum took place when coupling factor 1 of spinach chloroplasts (CF_1) was mixed with ATP or ADP. The difference spectrum had a maximum at about 278 nm and a minimum at about 250 nm. The profile of the difference spectrum inidcates a shift in the absorption spectrum of the ADP or ATP bound to CF_1. The ratio of the maximal absorbance change at about 278 nm to the absorbance of CF_1 at that wavelength was 0.027-0.048. The molar concentration of nucleotide required to give the maximal absorbance change was 2-3 times that of CF_1 when Ca^<2+> or Mg^<2+> was present. AMP induced no significant spectral change. When ADP was added, the absorbance change reached a plateau within a few minutes if Mg^<2+> or Ca^<2+> was present. The absorbance change induced by ATP reached a plateau within a few minutes only when Ca^<2+> was present. In the presence of Mg^<2+>, it reached a plateau of nearly the same level, but at a slower rate. The absorbance change was reduced in the presence of EDTA. PPi effectively inhibited the absorbance change induced by ADP and Mg^<2+>.
- 日本植物生理学会の論文
著者
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Tanaka Miyako
Department Of Biology School Of Education Waseda University
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Sakurai Hidehiro
Department Of Applied Chemistry Graduate School Of Engineering Osaka University
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Sakurai Hidehiro
Department Of Biology School Of Education Waseda University
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Sakurai Hidehiro
Department Of Applied Chemistry Faculty Of Engineering Osaka University
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TANAKA Miyako
Department of Agricultural Chemistry, Kyoto University
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