Luminescence of singlet oxygen in photosystem II complexes isolated from cyanobacterium Synechocystis sp. PCC6803 containing monovinyl or divinyl chlorophyll a

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• 作者：Tatsuya Tomo^a ; ^b ; ^{tomo@rs.tus.ac.jp} ; Hayato Kusakabe^a ; Ryo Nagao^c ; Hisashi Ito^d ; Ayumi Tanaka^d ; Seiji Akimoto^e ; Mamoru Mimuro^f ; Shigetoshi Okazaki^g
• 关键词：Chl ; chlorophyll ; DV ; di-vinyl ; MV ; mono-vinyl ; PS ; photosystem ; WT ; wild-type ; QA ; secondary electron acceptor
• 刊名：Biochimica et Biophysica Acta (BBA)/Bioenergetics
• 出版年：2012
• 期刊代码：13_00052728
• 类别：bio
• 出版时间：August, 2012
• 卷：1817
• 期：8
• 页码：1299-1305
• 文件大小：725 K

摘要

The luminescence spectrum of singlet oxygen produced upon excitation at 674 nm in the photochemically active photosystem II (PS II) complexes isolated from cyanobacterium Synechocystis sp. PCC 6803 containing different types of chlorophyll, i.e., monovinyl (wild-type) or divinyl (genetically modified) chlorophyll a. The yield of singlet oxygen, estimated using methylene blue as the standard, from the divinyl-chlorophyll PS II complex was more than five times greater than that from the monovinyl-chlorophyll PS II complex. These results are consistent with the observed difference in the sensitivity towards high intensity of light between the two cyanobacterial strains. The yield of singlet oxygen appeared to increase with the level of triplet chlorophyll, in the divinyl-chlorophyll PS II complex. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.