Dissipation of excess energy triggered by blue light in cyanobacteria with CP43′ (isiA)

IF 3.4 2区生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biochimica et Biophysica Acta-Bioenergetics Pub Date : 2004-11-04 DOI:10.1016/j.bbabio.2004.08.001

Jean-Charles Cadoret , Raphaël Demoulière , Johann Lavaud , Hans J. van Gorkom , Jean Houmard , Anne-Lise Etienne

引用次数: 0

Abstract

The chlorophyll-protein CP43′ (isiA gene) induced by stress conditions in cyanobacteria is shown to serve as an antenna for Photosystem II (PSII), in addition to its known role as an antenna for Photosystem I (PSI). At high light intensity, this antenna is converted to an efficient trap for chlorophyll excitations that protects system II from photo-inhibition. In contrast to the ‘energy-dependent non-photochemical quenching’ (NPQ) in chloroplasts, this photoprotective energy dissipation in cyanobacteria is triggered by blue light. The induction is proportional to light intensity. Induction and decay of the quenching exhibit the same large temperature-dependence.

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蓝细菌中CP43' (isiA)对蓝光引发的多余能量的耗散。

蓝藻在逆境条件下诱导的叶绿素蛋白CP43' (isiA基因)，除了其已知的光系统I (PSI)的天线作用外，还可以作为光系统II (PSII)的天线。在高光强下，该天线被转换为叶绿素激发的有效陷阱，保护系统II免受光抑制。与叶绿体中的“能量依赖性非光化学猝灭”(NPQ)相反，蓝藻中的这种光保护能量耗散是由蓝光触发的。感应强度与光强成正比。淬火的感应和衰减表现出同样大的温度依赖性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biochimica et Biophysica Acta-Bioenergetics 生物-生化与分子生物学

CiteScore

9.50

自引率

7.00%

发文量

363

审稿时长

92 days

期刊介绍： BBA Bioenergetics covers the area of biological membranes involved in energy transfer and conversion. In particular, it focuses on the structures obtained by X-ray crystallography and other approaches, and molecular mechanisms of the components of photosynthesis, mitochondrial and bacterial respiration, oxidative phosphorylation, motility and transport. It spans applications of structural biology, molecular modeling, spectroscopy and biophysics in these systems, through bioenergetic aspects of mitochondrial biology including biomedicine aspects of energy metabolism in mitochondrial disorders, neurodegenerative diseases like Parkinson''s and Alzheimer''s, aging, diabetes and even cancer.