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Study on the photo-generation of superoxide radicals in Photosystem II with EPR spin trapping techniques
Zhang, SP; Weng, J; Pan, JX(潘景喜); Tu, TC(屠铁成); Yao, S(姚思德); Xu, CH
2003
Source PublicationPHOTOSYNTHESIS RESEARCH
ISSN0166-8595
Volume75Issue:1Pages:41
AbstractDirect EPR evidence of the photo-generation of superoxide radicals (O-2(-.)) was obtained by using a novel spin trapping probe in spinach Photosystem II (PS II) membrane fragments. The production of O-2(-.) was detected by following the formation of 5-diethoxyphosphoryl-5-methyl-1-pyrroline-N-oxide (DEPMPO) superoxide adducts (DEPMPO-OOH). The inhibition of O-2(-.) formation by 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) and the 77 K fluorescence spectrum indicated that O-2(-.) were generated from PS II, not from PS I. The inhibition of O-2(-.) formation by DCMU also suggested that O-2(-.) were generated from the Q(B)binding site, not at a site prior to DCMU blockage. The extrinsic proteins and Mn are very important to eliminate O-2(-.), showing that the oxygen-evolving system is involved in O-2(-.) removal rather than production.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000181045300004
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/10201
Collection中科院上海原子核所2003年前
Recommended Citation
GB/T 7714
Zhang, SP,Weng, J,Pan, JX,et al. Study on the photo-generation of superoxide radicals in Photosystem II with EPR spin trapping techniques[J]. PHOTOSYNTHESIS RESEARCH,2003,75(1):41.
APA Zhang, SP,Weng, J,Pan, JX,Tu, TC,Yao, S,&Xu, CH.(2003).Study on the photo-generation of superoxide radicals in Photosystem II with EPR spin trapping techniques.PHOTOSYNTHESIS RESEARCH,75(1),41.
MLA Zhang, SP,et al."Study on the photo-generation of superoxide radicals in Photosystem II with EPR spin trapping techniques".PHOTOSYNTHESIS RESEARCH 75.1(2003):41.
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