Fourier transform infrared spectroscopy of special pair bacteriochlorophylls in homodimeric reaction centers of heliobacteria and green sulfur bacteria
Fourier transform infrared spectroscopy of special pair bacteriochlorophylls in homodimeric reaction centers of heliobacteria and green sulfur bacteria
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DOI：
10.1007/s11120-009-9509-0
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发表时间：
2010-01
影响因子：
3.7
通讯作者：
T. Noguchi
中科院分区：
文献类型：
--
作者：
T. Noguchi
太阳细菌和绿色硫细菌具有类似于光系统I的I型同二聚体反应中心。关于这些同二聚体反应中心的一个遗留问题是结构和电子转移反应是否是真正对称的。这个问题与异二聚反应中心的起源有关，如光系统I和II型反应中心。本文综述了对特殊的叶绿素对--阳细菌中的P798和绿色硫细菌中的P840的傅立叶变换红外光谱研究。光系统I的X-射线晶体结构和I型反应中心蛋白质的序列排列的光的数据进行重新解释，并讨论在氢键相互作用和对称性的电荷分布在二聚体。
Heliobacteria and green sulfur bacteria have type I homodimeric reaction centers analogous to photosystem I. One remaining question regarding these homodimeric reaction centers is whether the structures and electron transfer reactions are truly symmetric or not. This question is relevant to the origin of the heterodimeric reaction centers, such as photosystem I and type II reaction centers. In this mini-review, Fourier transform infrared studies on the special pair bacteriochlorophylls, P798 in heliobacteria and P840 in green sulfur bacteria, are summarized. The data are reinterpreted in the light of the X-ray crystallographic structure of photosystem I and the sequence alignments of type I reaction center proteins, and discussed in terms of hydrogen bonding interactions and the symmetry of charge distribution over the dimer.