Biogenesis, assembly and turnover of photosystem II units
Biogenesis, assembly and turnover of photosystem II units
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光系统II单元的生物发生、组装与更新
DOI：
10.1098/rstb.2002.1141
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发表时间：
2002-10-29
影响因子：
6.3
通讯作者：
Aro, EM
中科院分区：
文献类型：
--
作者：
Baena-González, E;Aro, EM
光系统II是嵌入类囊体膜的多蛋白质复合体，光系统II的组装需要20多个蛋白质亚基的化学计量生产。由于部分蛋白质亚基在叶绿体基因组中编码，部分在细胞核中编码，为了防止蛋白质的浪费产生，信号网络在两个遗传间隔之间运行。蛋白质的协调合成也发生在叶绿体编码的亚基之间，因此在蛋白质组分中建立了允许逐步构建复合体的层次结构。除了对组装伙伴的依赖外，其他因素，如叶绿体的发育阶段和与光合作用相关的各种参数，都严格控制着PSII亚基的积累、膜靶向和组装。在这里，我们简要地回顾了这一领域的三个主要方法：光系统II在叶绿体发育过程中的生物发生，光系统II特异突变体的利用，以及光系统II在修复周期中的周转。
Assembly of photosystem II, a multiprotein complex embedded in the thylakoid membrane, requires stoichiometric production of over 20 protein subunits. Since part of the protein subunits are encoded in the chloroplast genome and part in the nucleus, a signalling network operates between the two genetic compartments in order to prevent wasteful production of proteins. Coordinated synthesis of proteins also takes place among the chloroplast-encoded subunits, thus establishing a hierarchy in the protein components that allows a stepwise building of the complex. In addition to this dependence on assembly partners, other factors such as the developmental stage of the plastid and various photosynthesis-related parameters exert a strict control on the accumulation, membrane targeting and assembly of the PSII subunits. Here, we briefly review recent results on this field obtained with three major approaches: biogenesis of photosystem II during the development of chloroplasts from etioplasts, use of photosystem II-specific mutants and photosystem II turnover during its repair cycle.