Coherent Electron Transfer in Reaction Centers of YM210L and YM210L/HL168L Mutants of Rba. Sphaeroides

机译：Rba YM210L和YM210L / HL168L突变体反应中心的相干电子转移。球菌

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A role of tyrosine M210 in the charge separation and stabilization of separated charges was studied by analyzing of the femtosecond oscillations in the kinetics of decay of stimulated emission from P* and of a population of the primary charge separated state P+Ba-in the YM210L and YM210L/HL168L mutant reaction centers (RCs) of Rhodobacter (Rba.) sphaeroides in comparison with those in native RCs of Rba. Sphaeroides. Kinetics of P* decay at 940 nm of the both mutants show a significant slowing-down of the primary charge separation reaction in comparison with native RCs. Distinct damped oscillations in these kinetics with main frequency bands in the range of 90-150 cm-1 reflect mostly nuclear motions inside the dimer P. Formation of a very small absorption band of BA-at 1020 nm is registered in RCs of both mutants. The formation of the BA-band is accompanied by damped oscillations with main frequencies from 10 to 150 cm-1. Only a partial stabilization of the P+Ba- state is seen in the YM210L/HL168L mutant in the form of a small non-oscillating background of the 1020-nm kinetics. Similar charge stabilization is absent in the YM210L mutant. A model of oscillatory reorientation of the OH-group of TyrM210 in the electric fields of P+ and Ba-was proposed to explain a rapid stabilization of the P+Ba-state in native RCs. A conclusion was done that, probably, the absence of TyrM210 can not be compensated by lowering of the P+BA-free energy that is expected for the double YM210L/HL168L mutant.

机译：通过分析飞秒振荡对YM210L中P *和P * Ba-主电荷分离态的激发发射衰变动力学的影响，研究了酪氨酸M210在电荷分离和稳定分离电荷中的作用。与球形Rhodobacter（Rba。）的YM210L / HL168L突变反应中心（RCs）相比。球菌。与天然RCs相比，两个突变体在940 nm处P *衰减的动力学都表明初级电荷分离反应的显着减慢。在这些动力学中，主要频带在90-150 cm-1范围内的明显阻尼振荡主要反映了二聚体P内部的核运动。两个突变体的RCs中都记录了BA-在1020 nm处非常小的吸收带的形成。 BA频带的形成伴随着主频率为10至150 cm-1的阻尼振荡。在YM210L / HL168L突变体中，仅以1020 nm动力学的小的非振荡本底形式看到P + Ba-状态的部分稳定。 YM210L突变体中没有类似的电荷稳定作用。提出了在P +和Ba-电场中TyrM210的OH-基团的振荡重新定向模型，以解释天然RC中P + Ba态的快速稳定。得出的结论是，可能无法通过降低双YM210L / HL168L突变体预期的P + BA无能来补偿TyrM210的缺失。

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《Photosynthesis research for food, fuel and future》|2010年|91-94|共4页
会议地点 Beijing(CN)
作者
Andrei G Yakovlev; Lyudmila G Vasilieva; Tatyana I Khmelnitskaya; Valentina A Shkuropatova; Anatoli Ya Shkuropatov; Vladimir A Shuvalov;
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作者单位

A.N.Belozersky Institute of Chemical and Physical Biology, Moscow State University, Moscow 119991, Russian Federation;

Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation;

Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation;

Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation;

Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russian Federation;

A.N.Belozersky Institute of Chemical and Physical Biology, Moscow State University, Moscow 119991, Russian Federation;

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原文格式 PDF
正文语种 eng
中图分类光合作用、碳素同化作用;
关键词
Photosynthesis; Charge separation; Reaction center; Wave packet; Electron transfer;

机译：光合作用;电荷分离;反应中心;波包;电子转移;

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专利

1. Primary Electron Transfer in Reaction Centers of YM210L and YM210L/HL168L Mutants of Rhodobacter sphaeroides [J] . A. G. Yakovlev, L. G. Vasilieva, T. I. Khmelnitskaya Biochemistry . 2010,第7期

机译：球形红球菌YM210L和YM210L / HL168L突变体反应中心的一次电子转移
2. Primary processes of charge separation in reaction centers of YM210L/FM197Y and YM210L mutants of Rhodobacter sphaeroides [J] . A G Yakovlev L G Vasilieva A Y Shkuropatov V A Shuvalov Biochemistry . 2009,第11期

机译：球形红球菌YM210L / FM197Y和YM210L突变体反应中心电荷分离的主要过程
3. Primary Processes of Charge Separation in Reaction Centers of YM210L/FM197Y and YM210L Mutants of Rhodobacter sphaeroides [J] . A. G. Yakovlev, L. G. VasilievaDInstitute of Basic Biological Problems Russian Academy of Sciences 142290 PushchinoMoscow Region Russia, A. Y. ShkuropatovDInstitute of Basic Biological Problems Russian Academy of Sciences 142290 PushchinoMoscow Region Russia Biochemistry . 2009,第11期

机译：球形红球菌YM210L / FM197Y和YM210L突变体反应中心电荷分离的主要过程
4. INVESTIGATION OF B-BRANCH ELECTRON TRANSFER BY FEMTOSECOND TIME RESOLVED SPECTROSCOPY IN A RHODOBACTER SPHAEROIDES MUTANT REACTION CENTRE [C] . Dmitrij Frolov, Marion C. Wakeham, Elena G. Andrizhiyevskaya, International Congress of Photosynthesis . 2005

机译：乳椎丝毛杆菌突变体反应中心脱乳丝杆菌突变型光谱法对B型分支电子转移的研究
5. Temperature dependence of electron transfer in photosynthetic reaction centers from Rhodobacter sphaeroides: Trapping and characterization of conformational substates. [D] . Xu, Qiang. 2001

机译：球形球形红细菌在光合作用中心的电子转移的温度依赖性：构象亚型的捕获和表征。
6. Pathway of proton transfer in bacterial reaction centers: second-site mutation Asn-M44-->Asp restores electron and proton transfer in reaction centers from the photosynthetically deficient Asp-L213-->Asn mutant of Rhodobacter sphaeroides. [O] . S H Rongey, M L Paddock, G Feher, 2018

机译：细菌反应中心质子转移的途径：二级位点突变Asn-M44-> Asp恢复了光合缺陷型球形红球菌Asp-L213-> Asn突变体在反应中心的电子和质子转移。
7. Pathway of proton transfer in bacterial reaction centers: second-site mutation Asn-M44-->Asp restores electron and proton transfer in reaction centers from the photosynthetically deficient Asp-L213-->Asn mutant of Rhodobacter sphaeroides. [O] . Rongey, S H, Paddock, M L, Feher, G, 1993

机译：细菌反应中心质子转移的途径：二级位点突变Asn-M44-> Asp恢复了光合缺陷型球形红球菌Asp-L213-> Asn突变体在反应中心的电子和质子转移。
8. Formation of P(+)Q(sub B)(-) via B-branch electron transfer in mutant reaction211 centers [R] . Laible, P. D. 1998

机译：在突变反应211中心通过B-分支电子转移形成p（+）Q（亚B）（ - ）

Coherent Electron Transfer in Reaction Centers of YM210L and YM210L/HL168L Mutants of Rba. Sphaeroides

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