Charge separation in photosynthetic reaction centers

被引：0

作者：

Ivashin, N ^{[1
]}

Källebring, B ^{[1
]}

Larsson, S ^{[1
]}

Hansson, Ö ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Phys Chem, SE-41296 Gothenburg, Sweden

来源：

PHOTOSYNTHESIS: MECHANISMS AND EFFECTS, VOLS I-V | 1998年

关键词：

charge separation; electron transfer; purple bacteria; quantum chemical calculations; reaction centers;

D O I：

暂无

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Structural influences on the direction of electron transfer (ET) in the charge separation process of Rps. viridis and Rb. sphaeroides are studied using quantum chemical models to calculate the electronic factor. Our results support the sequential mechanism for the primary charge separation. Using crystallographic coordinates refined in 1994 [1,2] (Fig. 1), we find a larger coupling between the special pair D and the accessory bacteriochlorophyll (BChl) BA of the A branch than between D and Bg of the inactive B branch. The coupling between BA and bacteriopheophytin Phi(A) is accomplished by two methyl groups, directly connected to the conjugated pi system of the chromophore. A full account of this work was recently published [3].

引用

页码：711 / 714

页数：4

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