通过细菌光合反应中心叶绿素的酯基调节电子转移
Tuning electron transfer by ester-group of chlorophylls in bacterial photosynthetic reaction center.
作者信息
Ishikita Hiroshi, Loll Bernhard, Biesiadka Jacek, Galstyan Artur, Saenger Wolfram, Knapp Ernst-Walter
机构信息
Institute of Chemistry, Crystallography, Department of Biology, Chemistry, and Pharmacy, Free University of Berlin, Takustrasse 6, D-14195 Berlin, Germany.
出版信息
FEBS Lett. 2005 Jan 31;579(3):712-6. doi: 10.1016/j.febslet.2004.12.049.
Accessory chlorophylls (B(A/B)) in bacterial photosynthetic reaction center play a key role in charge-separation. Although light-exposed and dark-adapted bRC crystal structures are virtually identical, the calculated B(A) redox potentials for one-electron reduction differ. This can be traced back to different orientations of the B(A) ester-group. This tuning ability of chlorophyll redox potentials modulates the electron transfer from SP* to B(A).
细菌光合反应中心中的辅助叶绿素（B(A/B)）在电荷分离过程中起着关键作用。尽管光照和暗适应状态下的细菌视紫红质（bRC）晶体结构几乎相同，但计算得出的用于单电子还原的B(A)氧化还原电位却有所不同。这可以追溯到B(A)酯基的不同取向。叶绿素氧化还原电位的这种调节能力会调制从激发态特殊对（SP*）到B(A)的电子转移。
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