Krupnik Tomasz
Department of Molecular Plant Physiology, Institute of Environmental Biology, Faculty of Biology, University of Warsaw, Miecznikowa 1, Warsaw 02096, Poland.
Plant Sci. 2023 Nov;336:111854. doi: 10.1016/j.plantsci.2023.111854. Epub 2023 Sep 1.
The phycobilisome antennas, which contain phycobilin pigments instead of chlorophyll, are crucial for the photosynthetic activity of Cyanidioschyzon merolae cells, which thrive in an acidic and hot water environment. The accessible light intensity and quality, temperature, acidity, and other factors in this environment are quite different from those in the air available for terrestrial plants. Under these conditions, adaptation to the intensity and quality of light, as well as temperature, which are key factors in photosynthesis of higher plants, also affects this process in Cyanidioschyzon merolae cells. Adaptation to varying light conditions requires fast remodeling and re-tuning of their light-harvesting antennas (phycobilisomes) at multiple levels, from regulation of gene expression to structural reorganization of protein-pigment complexes. This review presents selected data on the structure of phycobilisomes, the genetic engineering of the constituent proteins, and the latest results and opinions on the adaptation of phycobilisomes to light intensity and quality, and temperature to photosynthetic activities. We pay special attention to the latest results of the C. merolae research.
藻胆体天线含有藻胆素色素而非叶绿素，对于嗜热栖热放线菌细胞的光合活性至关重要，该细胞在酸性热水环境中生长旺盛。这种环境中的可利用光强度和质量、温度、酸度及其他因素与陆地植物可利用的空气环境中的因素截然不同。在这些条件下，适应高等植物光合作用的关键因素——光的强度和质量以及温度，也会影响嗜热栖热放线菌细胞的这一过程。适应不同的光照条件需要在多个层面快速重塑和重新调整其光捕获天线（藻胆体），从基因表达调控到蛋白质 - 色素复合物的结构重组。本综述展示了关于藻胆体结构、组成蛋白的基因工程以及藻胆体适应光强度和质量及温度以进行光合活动的最新结果和观点。我们特别关注嗜热栖热放线菌研究的最新成果。
