ICCAS OpenIR
Superoxide, hydrogen peroxide and hydroxyl radical in D1/D2/cytochrome b-559 Photosystem II reaction center complex
Liu, K; Sun, J; Song, YG; Liu, B; Xu, YK; Zhang, SX; Tian, Q; Liu, Y
2004-07-01
Source PublicationPHOTOSYNTHESIS RESEARCH
ISSN0166-8595
Volume81Issue:1Pages:41-47
AbstractSpin-trapping electron spin resonance (ESR) was used to monitor the formation of superoxide and hydroxyl radicals in D1/D2/cytochrome b-559 Photosystem II reaction center (PS II RC) Complex. When the PS II RC complex was strongly illuminated, superoxide was detected in the presence of ubiquinone. SOD activity was detected in the PS II RC complex. A primary product of superoxide, hydrogen peroxide, resulted in the production of the most destructive reactive oxygen species, (OH)-O-., in illuminated PS II RC complex. The contributions of ubiquinone, SOD and H2O2 to the photobleaching of pigments and protein photodamage in the PS II RC complex were further studied. Ubiquinone protected the PS II RC complex from photodamage and, interestingly, extrinsic SOD promoted this damage. All these results suggest that PS II RC is an active site for the generation of superoxide and its derivatives, and this process protects organisms during strong illumination, probably by inhibiting more harmful ROS, such as singlet oxygen.
KeywordHydroxyl Radical Photosystem Ii Reaction Center Superoxide Superoxide Dismutase
Indexed BySCI
Language英语
WOS IDWOS:000221506800003
PublisherKLUWER ACADEMIC PUBL
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81626
Collection中国科学院化学研究所
Corresponding AuthorLiu, Y
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, K,Sun, J,Song, YG,et al. Superoxide, hydrogen peroxide and hydroxyl radical in D1/D2/cytochrome b-559 Photosystem II reaction center complex[J]. PHOTOSYNTHESIS RESEARCH,2004,81(1):41-47.
APA Liu, K.,Sun, J.,Song, YG.,Liu, B.,Xu, YK.,...&Liu, Y.(2004).Superoxide, hydrogen peroxide and hydroxyl radical in D1/D2/cytochrome b-559 Photosystem II reaction center complex.PHOTOSYNTHESIS RESEARCH,81(1),41-47.
MLA Liu, K,et al."Superoxide, hydrogen peroxide and hydroxyl radical in D1/D2/cytochrome b-559 Photosystem II reaction center complex".PHOTOSYNTHESIS RESEARCH 81.1(2004):41-47.
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