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Light harvesting complexes in chlorophyll c-containing algae.
Biochimica et Biophysica Acta (BBA) - Bioenergetics ( IF 3.4 ) Pub Date : 2019-05-31 , DOI: 10.1016/j.bbabio.2019.05.003
Claudia Büchel 1
Affiliation  

Besides the so-called 'green lineage' of eukaryotic photosynthetic organisms that include vascular plants, a huge variety of different algal groups exist that also harvest light by means of membrane intrinsic light harvesting proteins (Lhc). The main taxa of these algae are the Cryptophytes, Haptophytes, Dinophytes, Chromeridae and the Heterokonts, the latter including diatoms, brown algae, Xanthophyceae and Eustigmatophyceae amongst others. Despite the similarity in Lhc proteins between vascular plants and these algae, pigmentation is significantly different since no Chl b is bound, but often replaced by Chl c, and a large diversity in carotenoids functioning in light harvesting and/or photoprotection is present. Due to the presence of Chl c in most of the taxa the name 'Chl c-containing organisms' has become common, however, Chl b-less is more precise since some harbour Lhc proteins that only bind one type of Chl, Chl a. In recent years huge progress has been made about the occurrence and function of Lhc in diatoms, so-called fucoxanthin chlorophyll proteins (FCP), where also the first molecular structure became available recently. In addition, especially energy transfer amongst the unusual pigments bound was intensively studied in many of these groups. This review summarises the present knowledge about the molecular structure, the arrangement of the different Lhc in complexes, the excitation energy transfer abilities and the involvement in photoprotection of the different Lhc systems in the so-called Chl c-containing organisms. This article is part of a Special Issue entitled Light harvesting, edited by Dr. Roberta Croce.

中文翻译:

含叶绿素c的藻类中的光收集复合物。

除了包括血管植物的真核光合生物的“绿色谱系”外,还存在各种各样的藻类,它们也通过膜内在光收集蛋白(Lhc)收集光。这些藻类的主要分类群是隐藻类,触藻类,Dinophytes,Chromeridae和Heterokonts,后者包括硅藻,褐藻,Xanthophyceae和Eustigmatophyceae等。尽管维管植物和这些藻类之间的Lhc蛋白具有相似性,但色素沉着是显着不同的,因为没有Chlb结合,但常常被Chlc取代,并且存在着在光收集和/或光保护中起作用的类胡萝卜素的多样性。由于大多数分类单元中都存在Chl c,因此“含Chl c的生物”的名称已变得很普遍,不含Chl b的基因更为精确,因为某些带有Lhc蛋白的蛋白质仅结合一种Chl Cha。近年来,关于Lhc在硅藻(所谓的岩藻黄质叶绿素蛋白(FCP))中的发生和功能方面已经取得了巨大的进步,最近,第一个分子结构也开始出现。另外,在这些组中的许多组中,特别是在非常规颜料之间的能量转移进行了深入研究。这篇综述总结了有关分子结构,复合物中不同Lhc的排列,激发能转移能力以及在所谓的含Chlc生物中不同Lhc系统的光保护作用的相关知识。本文是Roberta Croce博士编辑的《光的收获》特刊的一部分。
更新日期:2019-10-23
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