How can Phycobilisome, the unique light harvesting system in certain algae working highly efficiently: The connection in between structures and functions

IF 3.2 3区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Progress in Biophysics & Molecular Biology Pub Date : 2023-11-28 DOI:10.1016/j.pbiomolbio.2023.11.005
Runze Liu , Zhang-He Zhen , Wenjun Li , Baosheng Ge , Song Qin
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Abstract

Algae, which are ubiquitous in ecosystems, have evolved a variety of light-harvesting complexes to better adapt to diverse habitats. Phycobilisomes/phycobiliproteins, unique to cyanobacteria, red algae, and certain cryptomonads, compensate for the lack of chlorophyll absorption, allowing algae to capture and efficiently transfer light energy in aquatic environments. With the advancement of microscopy and spectroscopy, the structure and energy transfer processes of increasingly complex phycobilisomes have been elucidated, providing us with a vivid portrait of the dynamic adaptation of their structures to the light environment in which algae thrive: 1) Cyanobacteria living on the surface of the water use short, small phycobilisomes to absorb red-orange light and reduce the damage from blue-violet light via multiple methods; 2) Large red algae inhabiting the depths of the ocean have evolved long and dense phycobilisomes containing phycoerythrin to capture the feeble blue-green light; 3) In far-red light environments such as caves, algae use special allophycocyanin cores to optimally utilize the far-red light; 4) When the environment shifts, algae can adjust the length, composition and density of their rods to better adapt; 5) By carefully designing the position of the pigments, phycobilisomes can transfer light energy to the reaction center with nearly 100% efficiency via three energy transfer processes.

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藻胆体,某些藻类中独特的光收集系统是如何高效工作的:结构和功能之间的联系。
藻类在生态系统中无处不在,它们已经进化出各种各样的光收集复合物,以更好地适应不同的栖息地。藻胆异构体是蓝藻、红藻和某些隐单胞菌所特有的,它们弥补了叶绿素吸收的不足,使藻类能够在水生环境中捕获并有效地转移光能。随着显微镜和光谱学的进步,越来越复杂的藻胆体结构和能量传递过程已经被阐明,为我们生动地描绘了藻胆体结构对藻类生长的光环境的动态适应:1)表面栖息的蓝藻利用短而小的藻胆体吸收红橙光,通过多种方法减少蓝紫光的伤害;2)生活在海洋深处的大型红藻进化出了含有藻红蛋白的长而密集的藻胆体,以捕捉微弱的蓝绿色光;3)在洞穴等远红光环境中,藻类利用特殊的异藻蓝蛋白核对远红光进行优化利用;4)当环境发生变化时,藻类可以调整其杆体的长度、组成和密度,以更好地适应环境;5)通过精心设计色素的位置,藻胆体可以通过三个能量传递过程将光能以接近100%的效率传递到反应中心。
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来源期刊
Progress in Biophysics & Molecular Biology
Progress in Biophysics & Molecular Biology 生物-生化与分子生物学
CiteScore
8.60
自引率
7.90%
发文量
85
审稿时长
85 days
期刊介绍: Progress in Biophysics & Molecular Biology is an international review journal and covers the ground between the physical and biological sciences since its launch in 1950. It indicates to the physicist the great variety of unsolved problems awaiting attention in biology and medicine. The biologist and biochemist will find that this journal presents new and stimulating ideas and novel approaches to studying and influencing structural and functional properties of the living organism. This journal will be of particular interest to biophysicists, biologists, biochemists, cell physiologists, systems biologists, and molecular biologists.
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