在CpcL-phycobilisomes的组合中
Rui Guo1, Ya-Li Xu1, Jun-Xun Zhu1
1National Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China.
The Plant journal : for cell and molecular biology
|February 6, 2024
概括
研究人员设计了CpcL-phycobilisomes (PBSs) 进行增强的光采集. 通过将CpcL蛋白与植物结合,他们创造了具有更广泛光谱范围的新型光收获复合体,可能用于太阳能应用.
科学领域:
- 生物化学 生物化学
- 光合作用研究研究光合作用.
- 蓝藻细菌收集光的系统
背景情况:
- CpcL-phycobilisomes (PBSs) 是蓝藻细菌中减少的收集光的复合体.
- 尽管缺乏传统的终端发射器,但它们表现出红移光 (~670nm).
- 了解它们的结构-功能关系是优化光捕获的关键.
研究的目的:
- 阐明CpcL-PBS红移光背后的机制.
- 设计具有更广泛光谱吸收的新型采光复合体.
- 探索太阳能采集的潜在应用.
主要方法:
- 在体外组装棒膜链接蛋白CpcL与物理.
- 用光谱分析来描述产生的复杂物.
- 局部定向的突变发生和染色体工程来修改光谱特性.
主要成果:
- 成功组装了模仿CpcL-PBS光谱特征的CpcL-phycocyanin复合体.成功组装了模仿CpcL-PBS光谱特征的CpcL-phycocyanin复合体.
- 在CpcL中鉴定出一个关键的谷氨酸残留物 (Q57),该残留物通过与基亚诺比林染色体的相互作用导致红色变化.
- 通过替代染色体来设计具有广泛可见光吸收的多色复合体.
结论:
- 这项研究揭示了CpcL-PBS红移光的特定分子机制.
- 基于胆蛋白的光采集元件的合理设计可以通过CpcL和植物工程来实现.
- 这些工程综合体提供了改善的光采集能力和太阳能应用的潜力.
相关概念视频
Protein Transport to the Thylakoids
2.3K
Thylakoids are membrane-bound sac-like structures within the chloroplast that serve as sites for photosynthesis. Thylakoid lumen contains many electron transport proteins and is enclosed by a thylakoid membrane rich in the light-harvesting complex. Proteins targeted to the thylakoids are transported as precursors and are sorted by the general TOC/TIC import pathway. Once the precursor reaches the stroma, stromal processing peptidases remove their transit signal and expose thylakoid signal...
2.3K
Photosystems
4.8K
Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment...
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment...
4.8K
Photosystem I
62.2K
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
62.2K
Clathrin Coated Vesicles
7.0K
Clathrin-coated vesicles use endocytosis to transport receptors and lysosomal hydrolases from the Golgi to the lysosome in the late secretory pathway. Clathrin-mediated endocytosis was the first described endocytic process, and Clathrin-coated vesicles remain one of the most well-studied transport vesicles. The molecular machinery that generates clathrin-coated vesicles comprises over 50 proteins that precisely coordinate vesicle formation. Cell surface receptors concentrated in indented sites...
7.0K
Photosystem II
70.4K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
70.4K
Protein Complex Assembly
10.6K
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
10.6K


