Involvement of Carboxyl Groups of the PSII Reaction Center Proteins in Photoactivation of the Apo-Water-Oxidizing Complex

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概要

• 論文の詳細を見る

• Involvement of residues of acidic amino acids in photo-ligation of manganese into the apo-water-oxidizing complex was investigated by use of 1-ethyl-3-[3-(dimethylarnino)propyl]carbodiimide (EDC), a water-soluble carboxyl modifier. Treatment of Mn-depleted PSII membranes by EDC in the presence of nucleophiles induced a loss of photoactivation capability in the Mn complex and partial loss of capability of photooxidation of Mn^<2+>, but little decrease in the DCIP photoreduction supported by diphenylcarbazide. The inhibition of diphenylcarbazide-photo-oxidation by submicromolar Mn^<2+>, indicative of the intactness of high-affinity Mn-binding sites, was apparently abolished by EDC treatment. From amino acid quantitation analysis of D1 and D2 proteins and CP47 of the chemically-modified membranes, approximately three carboxyl groups of the D1 protein were found to be chernically-modified with EDC after removal of the functional Mn. These results suggest that acidic amino acids on the D1 protein are involved in photoactivation of the apo-water-oxidizing complex and probably in ligation of Mn to the water-oxidizing complex.

• 日本植物生理学会の論文

著者

• Wada Keishiro

  Department Of Biology Faculty Of Science Osaka University

• Wada K

  Department Of Biology Faculty Of Science Kanazawa University

• INOUE Hiroshi

  Department of Internal Medicine, University of Toyama

• Wada Keishiro

  Department Of Bioiogy Faculty Of Science Kanazawa University

• Tamura Noriaki

  Faculty of Human Environmental Science, Fukuoka women's University

• Noda Kosaku

  Faculty of Human Environmental Science, Fukuoka women's University

• Wakamatsu Kunimitsu

  Faculty of Human Environmental Science, Fukuoka women's University

• Kamachi Hiroyuki

  Department of Environmental Biology and Chemistry, Faculty of science, Toyama University

• Noda Kosaku

  Faculty Of Human Environmental Science Fukuoka Women's University

• Tamura N

  Faculty Of Human Environmental Science Fukuoka Women's University

• Tamura Noriaki

  Faculty Of Human Environmental Science Fukuoka Women's University

• Inoue H

  Department Of General Thoracic Surgery Tokai University School Of Medicine

• KAMACHI Hiroyuki

  Graduate School of Science and Engineering, University of Toyama

• Kamachi Hiroyuki

  Graduate School Of Science And Engineering University Of Toyama

• Kamachi Hiroyuki

  Department Of Environmental Biology And Chemistry Faculty Of Science Toyama University

• Inoue Hiroshi

  Department Of Electrical And Electronic Engineering Akita University

• Wakamatsu Kunimitsu

  Faculty Of Human Environmental Science Fukuoka Women's University

• Kamachi Hiroyuki

  Department Of Environmental Biology And Chemistry Faculty Of Science University Of Toyama

• Inoue H

  Univ. Electro‐communications Chofu Jpn

• Inoue Hiroshi

  Departmcnt Of Biology Faculty Of Science Kyushu University:(present)department Of Biology Kyushu Den

• Inoue Hiroshi

  Department Of Thoracic Surgery Tokai University

• Inoue Hiroshi

  Deparment of Neurosurgery, Gunma University School of Medicine and Gamma Unit Center, Hidaka Hospital

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