Institute of Molecular, Cellular and Systems Biology, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK.
Photosynthetic Antenna Research Center, Washington University in St Louis, MO 63130, USA.
Faraday Discuss. 2018 Apr 1;207:471-489. doi: 10.1039/c7fd00191f. Epub 2018 Jan 22.
Typical purple bacterial photosynthetic units consist of light harvesting one/reaction centre 'core' complexes surrounded by light harvesting two complexes. Factors such as the number and size of photosynthetic units per cell, as well as the type of light harvesting two complex that is produced, are controlled by environmental factors. In this paper, the change in the type of LH2 present in the Rhodopsuedomonas acidophila strain 7050 is described when cells are grown at a range of different light intensities. This species contains multiple pucBA genes that encode the apoproteins that form light-harvesting complex two, and a more complex mixture of spectroscopic forms of this complex has been found than was previously thought to be the case. Femto-second time resolved absorption has been used to investigate how the energy transfer properties in the membranes of high-light and low-light adapted cells change as the composition of the LH2 complexes varies.
典型的紫色细菌光合单位由光收集器一/反应中心“核心”复合物组成，周围环绕着光收集器二复合物。每个细胞中的光合单位数量和大小以及产生的光收集器二复合物的类型等因素受环境因素控制。在本文中，描述了当细胞在一系列不同的光强度下生长时，嗜酸性红假单胞菌 7050 菌株中存在的 LH2 类型的变化。该物种包含多个 pucBA 基因，这些基因编码形成光收集器二的脱辅基蛋白，并且已经发现该复合物的光谱形式比以前认为的更为复杂。飞秒时间分辨吸收已被用于研究随着 LH2 复合物组成的变化，高光和低光适应细胞的膜中的能量转移特性如何变化。
