Department of Chemistry, Yale University, New Haven, CT 06520, USA.
Biochim Biophys Acta Bioenerg. 2024 Aug 1;1865(3):149032. doi: 10.1016/j.bbabio.2024.149032. Epub 2024 Feb 22.
Photosystems I and II are the photooxidoreductases central to oxygenic photosynthesis and canonically absorb visible light (400-700 nm). Recent investigations have revealed that certain cyanobacteria can acclimate to environments enriched in far-red light (700-800 nm), yet can still perform oxygenic photosynthesis in a process called far-red light photoacclimation, or FaRLiP. During this process, the photosystem subunits and pigment compositions are altered. Here, the current structural understanding of the photosystems expressed during FaRLiP is described. The design principles may be useful for guiding efforts to engineer shade tolerance in organisms that typically cannot utilize far-red light.
光系统 I 和光系统 II 是产氧光合作用的核心光氧化还原酶，经典地吸收可见光（400-700nm）。最近的研究表明，某些蓝细菌可以适应富含远红光（700-800nm）的环境，但仍能在远红光光适应或 FaRLiP 的过程中进行产氧光合作用。在这个过程中，光合系统亚基和色素组成发生改变。本文描述了在 FaRLiP 过程中表达的光合系统的当前结构理解。这些设计原则可能有助于指导在通常不能利用远红光的生物体中进行耐荫性工程的努力。
