细菌光合反应中心中初始电荷分离的机制。
Mechanism of the initial charge separation in bacterial photosynthetic reaction centers.
作者信息
Chan C K, DiMagno T J, Chen L X, Norris J R, Fleming G R
机构信息
Department of Chemistry, University of Chicago, IL 60637.
出版信息
Proc Natl Acad Sci U S A. 1991 Dec 15;88(24):11202-6. doi: 10.1073/pnas.88.24.11202.
Abstract
The initial electron transfer in reaction centers from Rhodobacter sphaeroides R26 was studied by a subpicosecond transient pump-probe technique. The measured kinetics at various wavelengths were analyzed and compared with several mechanisms for electron transfer. An unambiguous determination of the initial electron transfer mechanism in reaction centers cannot be made by studying the anion absorption region (640-690 nm), due to the spectral congestion in this region. However, correlations between the stimulated emission decay of the excited state of the special pair, P*, at 926 nm and bleaching of the bacteriopheophytin Qx absorption at 545 nm suggest that the electron transfer at 283 K is dominated by a two-step sequential mechanism, whereas one-step superexchange and the two-step sequential mechanism have about equal contributions at 22 K.
摘要
利用亚皮秒瞬态泵浦-探测技术研究了球形红杆菌R26反应中心的初始电子转移。分析了在不同波长下测得的动力学，并与几种电子转移机制进行了比较。由于该区域的光谱重叠，通过研究阴离子吸收区域（640 - 690 nm）无法明确确定反应中心的初始电子转移机制。然而，特殊对P*的激发态在926 nm处的受激发射衰减与细菌叶绿素Qx在545 nm处吸收的漂白之间的相关性表明，在283 K时电子转移以两步连续机制为主，而在22 K时一步超交换和两步连续机制的贡献大致相等。
相似文献
1
Mechanism of the initial charge separation in bacterial photosynthetic reaction centers.细菌光合反应中心中初始电荷分离的机制。
Proc Natl Acad Sci U S A. 1991 Dec 15;88(24):11202-6. doi: 10.1073/pnas.88.24.11202.
2
An assessment of the mechanism of initial electron transfer in bacterial reaction centers.细菌反应中心初始电子转移机制的评估。
Biochemistry. 1991 Jan 22;30(3):609-13. doi: 10.1021/bi00217a003.
3
Electron transfer in the reaction center of the Rb. sphaeroides R-26 studied by transient absorption.通过瞬态吸收研究球形红杆菌R-26反应中心的电子转移。
J Phys Chem B. 2005 Sep 29;109(38):18171-6. doi: 10.1021/jp050682i.
4
Ultrafast Electron Transfer Kinetics in the LM Dimer of Bacterial Photosynthetic Reaction Center from Rhodobacter sphaeroides.球形红杆菌细菌光合反应中心LM二聚体中的超快电子转移动力学
J Phys Chem B. 2016 Jun 23;120(24):5395-404. doi: 10.1021/acs.jpcb.6b05082. Epub 2016 Jun 13.
5
Energetics and kinetics of radical pairs in reaction centers from Rhodobacter sphaeroides. A femtosecond transient absorption study.球形红杆菌反应中心中自由基对的能量学和动力学。飞秒瞬态吸收研究。
Biochemistry. 1996 Sep 10;35(36):11820-31. doi: 10.1021/bi9607012.
6
Relationship between thermodynamics and mechanism during photoinduced charge separation in reaction centers from Rhodobacter sphaeroides.球形红细菌反应中心光诱导电荷分离过程中热力学与机制的关系
Biochemistry. 1994 Jul 5;33(26):8101-12. doi: 10.1021/bi00192a015.
7
Formation of a long-lived P+BA- state in plant pheophytin-exchanged reaction centers of Rhodobacter sphaeroides R26 at low temperature.在低温下球形红杆菌R26的植物脱镁叶绿素交换反应中心中形成长寿命的P⁺BA⁻状态。
Biochemistry. 1997 Dec 23;36(51):16231-8. doi: 10.1021/bi9712605.
8
Primary electron transfer kinetics in membrane-bound Rhodobacter sphaeroides reaction centers: a global and target analysis.膜结合球形红细菌反应中心的初级电子转移动力学：全局和目标分析
Biochemistry. 1997 Sep 23;36(38):11360-8. doi: 10.1021/bi9707943.
9
Multiple pathways for ultrafast transduction of light energy in the photosynthetic reaction center of Rhodobacter sphaeroides.球形红细菌光合反应中心中光能超快转导的多种途径。
Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2054-9. doi: 10.1073/pnas.96.5.2054.
10
Coherent dynamics during the primary electron-transfer reaction in membrane-bound reaction centers of Rhodobacter sphaeroides.球形红细菌膜结合反应中心初级电子转移反应过程中的相干动力学。
Biochemistry. 1994 Jun 7;33(22):6750-7. doi: 10.1021/bi00188a002.
引用本文的文献
1
Ultrafast structural changes within a photosynthetic reaction centre.光合作用反应中心内的超快结构变化。
Nature. 2021 Jan;589(7841):310-314. doi: 10.1038/s41586-020-3000-7. Epub 2020 Dec 2.
2
Overlapping Electronic States with Nearly Parallel Transition Dipole Moments in Reduced Anionic Flavin Can Distort Photobiological Dynamics.具有近乎平行跃迁偶极矩的重叠电子态可使还原阴离子黄素的光生物动力学发生扭曲。
J Am Chem Soc. 2016 Nov 16;138(45):14880-14889. doi: 10.1021/jacs.6b06449. Epub 2016 Nov 8.
3
Weak temperature dependence of P (+) H A (-) recombination in mutant Rhodobacter sphaeroides reaction centers.球形红细菌突变体反应中心中P(+)H A(-)重组的弱温度依赖性
Photosynth Res. 2016 Jun;128(3):243-58. doi: 10.1007/s11120-016-0239-9. Epub 2016 Mar 4.
4
Comparative study of reaction centers from purple photosynthetic bacteria: Isolation and optical spectroscopy.比较研究紫色光合细菌的反应中心：分离与光学光谱。
Photosynth Res. 1994 Dec;42(3):203-15. doi: 10.1007/BF00018263.
5
A nonadiabatic theory for ultrafast catalytic electron transfer: a model for the photosynthetic reaction center.超快催化电子转移的非绝热理论：光合反应中心的一个模型。
J Biol Phys. 2005 Dec;31(3-4):375-402. doi: 10.1007/s10867-005-1283-4.
6
Dynamical theory of primary processes of charge separation in the photosynthetic reaction center.光合作用反应中心电荷分离初级过程的动力学理论。
J Biol Phys. 2005 May;31(2):145-59. doi: 10.1007/s10867-005-5109-1.
7
Energy trapping and detrapping in reaction center mutants from Rhodobacter sphaeroides.球形红细菌反应中心突变体中的能量捕获与解捕获
Biophys J. 2003 May;84(5):3240-51. doi: 10.1016/S0006-3495(03)70048-4.
8
The accessory bacteriochlorophyll: a real electron carrier in primary photosynthesis.辅助细菌叶绿素：初级光合作用中真正的电子载体。
Proc Natl Acad Sci U S A. 1993 Dec 15;90(24):11757-61. doi: 10.1073/pnas.90.24.11757.
9
Ab initio calculation of electronic coupling in the photosynthetic reaction center.光合作用反应中心中电子耦合的从头算计算。
Proc Natl Acad Sci U S A. 1998 Nov 10;95(23):13603-5. doi: 10.1073/pnas.95.23.13603.
10
Long-time quantum simulation of the primary charge separation in bacterial photosynthesis.
Proc Natl Acad Sci U S A. 1996 Apr 30;93(9):3926-31. doi: 10.1073/pnas.93.9.3926.
本文引用的文献
1
Femtosecond spectroscopy of excitation energy transfer and initial charge separation in the reaction center of the photosynthetic bacterium Rhodopseudomonas viridis.绿硫菌光合作用反应中心激发能量转移和初始电荷分离的飞秒光谱学研究。
Proc Natl Acad Sci U S A. 1986 Jul;83(14):5121-5. doi: 10.1073/pnas.83.14.5121.
2
Femtosecond spectroscopy of electron transfer in the reaction center of the photosynthetic bacterium Rhodopseudomonas sphaeroides R-26: Direct electron transfer from the dimeric bacteriochlorophyll primary donor to the bacteriopheophytin acceptor with a time constant of 2.8 +/- 0.2 psec. 解析：
原文中的“bacteriochlorophyll”和“bacteriopheophytin”为两个专有名词，分别译为“菌绿素”和“细菌叶绿素原”。
译文： 球形红假单胞菌反应中心电子转移的飞秒光谱学研究：二聚菌绿素原初供体到细菌叶绿素原受体的直接电子转移，时间常数为 2.8±0.2 皮秒。
Proc Natl Acad Sci U S A. 1986 Feb;83(4):957-61. doi: 10.1073/pnas.83.4.957.
3
Model for primary charge separation in reaction centers of photosynthetic bacteria.光合作用细菌反应中心的初始电荷分离模型。
Proc Natl Acad Sci U S A. 1982 Mar;79(6):2138-42. doi: 10.1073/pnas.79.6.2138.
4
Initial electron-transfer in the reaction center from Rhodobacter sphaeroides.球形红细菌反应中心的初始电子转移
Proc Natl Acad Sci U S A. 1990 Jul;87(13):5168-72. doi: 10.1073/pnas.87.13.5168.
5
Evidence that a distribution of bacterial reaction centers underlies the temperature and detection-wavelength dependence of the rates of the primary electron-transfer reactions.有证据表明，细菌反应中心的分布是初级电子转移反应速率对温度和检测波长依赖性的基础。
Proc Natl Acad Sci U S A. 1990 May;87(9):3552-6. doi: 10.1073/pnas.87.9.3552.
6
X-ray structure analysis of a membrane protein complex. Electron density map at 3 A resolution and a model of the chromophores of the photosynthetic reaction center from Rhodopseudomonas viridis.一种膜蛋白复合物的X射线结构分析。来自绿脓杆菌光合反应中心发色团的3埃分辨率电子密度图和模型。
J Mol Biol. 1984 Dec 5;180(2):385-98. doi: 10.1016/s0022-2836(84)80011-x.
7
Anion radical of bacteriochlorophyll.细菌叶绿素阴离子自由基
J Am Chem Soc. 1973 Apr 18;95(8):2739-41. doi: 10.1021/ja00789a085.
8
Picosecond kinetics of the initial photochemical electron-transfer reaction in bacterial photosynthetic reaction centers.细菌光合反应中心初始光化学电子转移反应的皮秒动力学。
Biochemistry. 1985 Dec 17;24(26):7516-21. doi: 10.1021/bi00347a002.
9
Structure of Rhodopseudomonas sphaeroides R-26 reaction center.球形红假单胞菌R-26反应中心的结构。
FEBS Lett. 1986 Sep 1;205(1):82-6. doi: 10.1016/0014-5793(86)80870-5.
10
Structure of the reaction center from Rhodobacter sphaeroides R-26: the cofactors.球形红杆菌R-26反应中心的结构：辅因子
Proc Natl Acad Sci U S A. 1987 Aug;84(16):5730-4. doi: 10.1073/pnas.84.16.5730.
Zotero 插件