首页> 外文期刊>Nature >State transitions and light adaptation require chloroplast thylakoid protein kinase STN7
【24h】

State transitions and light adaptation require chloroplast thylakoid protein kinase STN7

机译:状态转换和光适应需要叶绿体类囊体蛋白激酶STN7

获取原文
获取原文并翻译 | 示例
           

摘要

Photosynthetic organisms are able to adjust to changing light conditions through state transitions, a process that involves the redistribution of light excitation energy between photosystem II (PSII) and photosystem I (PSI)(1,2). Balancing of the light absorption capacity of these two photosystems is achieved through the reversible association of the major antenna complex (LHCII) between PSII and PSI (ref. 3). Excess stimulation of PSII relative to PSI leads to the reduction of the plastoquinone pool and the activation of a kinase(4,5); the phosphorylation of LHCII; and the displacement of LHCII from PSII to PSI ( state 2). Oxidation of the plastoquinone pool by excess stimulation of PSI reverses this process ( state 1). The Chlamydomonas thylakoid-associated Ser-Thr kinase Stt7, which is required for state transitions, has an orthologue named STN7 in Arabidopsis(6). Here we show that loss of STN7 blocks state transitions and LHCII phosphorylation. In stn7 mutant plants the plastoquinone pool is more reduced and growth is impaired under changing light conditions, indicating that STN7, and probably state transitions, have an important role in response to environmental changes.
机译:光合生物能够通过状态转换来适应不断变化的光照条件,该过程涉及光激发能在光系统II(PSII)和光系统I(PSI)之间的重新分配(1,2)。这两个光系统的光吸收能力的平衡是通过PSII和PSI之间主要天线复合体(LHCII)的可逆关联来实现的(参考文献3)。 PSII相对于PSI的过度刺激导致质体醌库的减少和激酶的激活(4,5); LHCII的磷酸化;以及LHCII从PSII到PSI的置换(状态2)。通过过度刺激PSI氧化质体醌库可逆转此过程(状态1)。衣原体类囊体相关的Ser-Thr激酶Stt7是状态转换所必需的,在拟南芥中有一个直立同源物名为STN7(6)。在这里,我们显示STN7的丢失会阻止状态转换和LHCII磷酸化。在stn7突变植物中,在变化的光照条件下,质体醌库进一步减少,并且生长受到损害,这表明STN7以及可能的状态转变在响应环境变化中具有重要作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号