| Self-adaptable quinone-quinol exchange mechanism of photosystem ii | |
| Yao, Mingdong2,4; Liu, Ying3; Fei, Liping2; Zhou, Ye5; Wang, Fangjun5; Chen, Jun1,2 | |
| 刊名 | Journal of physical chemistry b
 |
| 2018-11-22 | |
| 卷号 | 122期号:46页码:10478-10489 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/acs.jpcb.8b09641 |
| 通讯作者 | Chen, jun(junchenspc@caep.cn) |
| 英文摘要 | The step of plastoquinone (pq) reduction to plastoquinol (pqh(2)) can regulate the photoreaction rate of photosystem ii (psii). to experimentally unravel the pq-pqh(2) exchange mechanism of psii, we investigate the reaction kinetics of plant psii membranes and the subunits trimmed psii core complexes with various pq-analogues and directly probe the reductions of pq and other quinones by 257 nm resonance raman scattering. two phases of quinone concentration effect on the reaction rate originate from the quinone-quinol exchange mechanism. the results indicate that high concentrations of quinone, more than one movable quinone molecule per psii reaction center, could trigger quinone-quinol exchange adapting to the unidirectional route: quinones enter through channel i and/or iii, and quinols leave through channel ii. a weak quinone binding site near q(b) probably plays a crucial role in pushing quinone-quinol exchange forward in the unidirectional route. our work provides experimental proofs demonstrating a self-adaptable quinone-quinol exchange mechanism of psii. |
| WOS关键词 | REACTION-CENTER COMPLEX ; ELECTRON-TRANSFER ; MEMBRANE-FRAGMENTS ; CYTOCHROME B(559) ; PLASTOQUINONE ; BINDING ; REDUCTION ; ENERGY ; RESOLUTION ; SITE |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000451495900007 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2373047 |
| 专题 | 大连化学物理研究所 |
| 通讯作者 | Chen, Jun |
| 作者单位 | 1.Sci & Technol Surface Phys & Chem Lab, Jiangyou 621908, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.China Acad Engn Phys, Inst Mat, Mianyang 621907, Peoples R China 4.Tianjin Univ, Minist Educ, Key Lab Syst Bioengn, Tianjin 300072, Peoples R China 5.Chinese Acad Sci, Natl Chromatog R&A Ctr, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Mingdong,Liu, Ying,Fei, Liping,et al. Self-adaptable quinone-quinol exchange mechanism of photosystem ii[J]. Journal of physical chemistry b,2018,122(46):10478-10489. |
| APA | Yao, Mingdong,Liu, Ying,Fei, Liping,Zhou, Ye,Wang, Fangjun,&Chen, Jun.(2018).Self-adaptable quinone-quinol exchange mechanism of photosystem ii.Journal of physical chemistry b,122(46),10478-10489. |
| MLA | Yao, Mingdong,et al."Self-adaptable quinone-quinol exchange mechanism of photosystem ii".Journal of physical chemistry b 122.46(2018):10478-10489. |
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