Dynamic Regulation of the Light-Harvesting System through State Transitions in Land Plants and Green Algae.
Dynamic Regulation of the Light-Harvesting System through State Transitions in Land Plants and Green Algae.
复制标题
通过陆地植物和绿藻的状态转换动态调节光采集系统。
DOI：
10.3390/plants12051173
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发表时间：
2023-03-03
期刊：
影响因子：
--
通讯作者：
Pan X
中科院分区：
文献类型：
--
作者：
Shang H;Li M;Pan X
光合作用是唯一已知的自然过程，它捕获太阳能，将二氧化碳和水转化为生物质。光合作用的初级反应由光系统II（PSII）和光系统I（PSI）复合物催化。这两个光系统与天线复合体，其主要功能是增加光捕获能力的核心。为了在不断变化的自然光环境下保持最佳的光合活性，植物和绿色藻类通过称为状态转换的过程来调节PSI和PSII之间所吸收的光激发能量。状态转换代表了一种短期的光适应机制，通过重新定位捕光复合物II（LHCII）蛋白来平衡两个光系统之间的能量分布。PSII（状态2）的优先激发导致叶绿体激酶的激活，其继而磷酸化LHCII，随后磷酸化LHCII从PSII释放并迁移到PSI的过程，从而形成PSI-LHCI-LHCII超复合物。该过程是可逆的，因为LHCII被去磷酸化并在PSI的优先激发下返回PSII。近年来，从植物和绿色藻类中获得的PSI-LHCI-LHCII超复合物的高分辨率结构被报道。这些结构数据提供了有关磷酸化LHCII与PSI相互作用模式以及超复合物中色素排列的详细信息，这对于构建激发能量转移途径和更深入地了解状态转变过程的分子机制至关重要。在这篇综述中，我们专注于从植物和绿色藻类的2态超复合物的结构数据，并讨论了天线和PSI核心之间的相互作用和潜在的能量转移途径在这些超复合物的知识的现状。
Photosynthesis constitutes the only known natural process that captures the solar energy to convert carbon dioxide and water into biomass. The primary reactions of photosynthesis are catalyzed by the photosystem II (PSII) and photosystem I (PSI) complexes. Both photosystems associate with antennae complexes whose main function is to increase the light-harvesting capability of the core. In order to maintain optimal photosynthetic activity under a constantly changing natural light environment, plants and green algae regulate the absorbed photo-excitation energy between PSI and PSII through processes known as state transitions. State transitions represent a short-term light adaptation mechanism for balancing the energy distribution between the two photosystems by relocating light-harvesting complex II (LHCII) proteins. The preferential excitation of PSII (state 2) results in the activation of a chloroplast kinase which in turn phosphorylates LHCII, a process followed by the release of phosphorylated LHCII from PSII and its migration to PSI, thus forming the PSI–LHCI–LHCII supercomplex. The process is reversible, as LHCII is dephosphorylated and returns to PSII under the preferential excitation of PSI. In recent years, high-resolution structures of the PSI–LHCI–LHCII supercomplex from plants and green algae were reported. These structural data provide detailed information on the interacting patterns of phosphorylated LHCII with PSI and on the pigment arrangement in the supercomplex, which is critical for constructing the excitation energy transfer pathways and for a deeper understanding of the molecular mechanism of state transitions progress. In this review, we focus on the structural data of the state 2 supercomplex from plants and green algae and discuss the current state of knowledge concerning the interactions between antenna and the PSI core and the potential energy transfer pathways in these supercomplexes.
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影响因子：
9.8
作者：
Bonente G;Ballottari M;Truong TB;Morosinotto T;Ahn TK;Fleming GR;Niyogi KK;Bassi R
通讯作者：
Bassi R
影响因子：
6.9
作者：
Busch A;Petersen J;Webber-Birungi MT;Powikrowska M;Lassen LM;Naumann-Busch B;Nielsen AZ;Ye J;Boekema EJ;Jensen ON;Lunde C;Jensen PE
通讯作者：
Jensen PE
影响因子：
4.3
作者：
Caspy, Ido;Malavath, Tirupathi;Nelson, Nathan
通讯作者：
Nelson, Nathan
影响因子：
7.4
作者：
Cariti，Federica;Chazaux，Marie;Goldschmidt-Clermont，Michel
通讯作者：
Goldschmidt-Clermont，Michel
影响因子：
7.7
作者：
Finazzi, G;Rappaport, F;Forti, G
通讯作者：
Forti, G