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2025年9月11日,中国科学院植物研究所研究员王文达、田利金团队首次纯化并解析了来自赫氏艾米里颗石藻的光系统I-岩藻黄素叶绿素a/c结合蛋白(PSIFCPI)超级复合物的三维结构,在原子层面揭示了颗石藻通过扩展和优化光系统结构来适应复杂海洋光环境的机制。相关研究成果以封面文章发表于《Science》。

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2025年9月11日,中国科学院植物研究所研究员王文达、田利金团队首次纯化并解析了来自赫氏艾米里颗石藻的光系统I-岩藻黄素叶绿素a/c结合蛋白(PSIFCPI)超级复合物的三维结构,在原子层面揭示了颗石藻通过扩展和优化光系统结构来适应复杂海洋光环境的机制。相关研究成果以封面文章发表于《Science》。

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(图片来源:《Science》)

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超级捕光机器让海洋浮游植物适应深海蓝绿光
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超级捕光机器让海洋浮游植物适应深海蓝绿光
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    2025年9月11日,中国科学院植物研究所研究员王文达、田利金团队首次纯化并解析了来自赫氏艾米里颗石藻的光系统I-岩藻黄素叶绿素a/c结合蛋白(PSIFCPI)超级复合物的三维结构,在原子层面揭示了颗石藻通过扩展和优化光系统结构来适应复杂海洋光环境的机制。相关研究成果以封面文章发表于《Science》。

    2025年9月11日,中国科学院植物研究所研究员王文达、田利金团队首次纯化并解析了来自赫氏艾米里颗石藻的光系统I-岩藻黄素叶绿素a/c结合蛋白(PSIFCPI)超级复合物的三维结构,在原子层面揭示了颗石藻通过扩展和优化光系统结构来适应复杂海洋光环境的机制。相关研究成果以封面文章发表于《Science》。

    . 超级捕光机器让海洋浮游植物适应深海蓝绿光. 科技导报, 2025 , 43 (19) : 9 -9 .
    . Science & Technology Review, 2025 , 43 (19) : 9 -9 .
    2025年9月11日,中国科学院植物研究所研究员王文达、田利金团队首次纯化并解析了来自赫氏艾米里颗石藻的光系统I-岩藻黄素叶绿素a/c结合蛋白(PSIFCPI)超级复合物的三维结构,在原子层面揭示了颗石藻通过扩展和优化光系统结构来适应复杂海洋光环境的机制。相关研究成果以封面文章发表于《Science》。
    颗石藻是海洋中重要的浮游植物类群,能够在不同水深、光照多变的环境中实现高效光合自养生长,对海洋初级生产力具有重要贡献。然而,其光系统复合物在微观层面如何实现高效捕获与利用光能,长期以来缺乏直接结构证据。
    研究团队解析发现,颗石藻PSI-FCPI超级复合物是迄今已知真核生物中规模最大的光合膜蛋白复合体,由51个蛋白亚基和819个色素分子组成,总分子量达1.66兆道尔顿(MDa),远超已报道的真核生物PSI捕光天线复合物(约600 kDa)。其捕光截面为陆地植物(豌豆)PSI超级复合物的4~5倍。飞秒瞬态吸收光谱结果表明,该复合物的光能捕获量子转化效率超过95%,与陆生植物PSI相当,显示出独特的蛋白组装与能量传递特性。
    结构分析显示,颗石藻PSI核心外围环绕着38个FCPI捕光天线,这些天线以模块化方式排列成8条放射状条带,形成“旋涡式”围绕PSI核心的巨型捕光结构。通过大量新型FCPI的精密装配,该结构显著扩展了捕光面积,并为能量传递提供了高效的空间组织基础。
    进一步的色素成分分析表明,颗石藻PSI-FCPI中富含叶绿素c和岩藻黄素类胡萝卜素,这些色素在460~540 nm波段(蓝绿光与绿光)具有强吸收能力,使颗石藻能够有效利用深水区特征光谱。此外,叶绿素c与叶绿素a之间的紧密能量耦联构建了低能量陷阱、流畅高效的能量传递网络,被认为是其实现超高量子转化效率的关键因素。
    “颗石藻光系统复合物的结构解析和机理研究,为理解光合生物高效的能量转化机制提供了新的结构模型。”王文达表示,未来将以此为基础设计新型光合作用蛋白,并进一步指导人工模拟和开发高碳汇生物资源。该研究在合成生物学和气候变化应对领域均具有巨大的应用潜力。
    (综合:《Science》、中国科学院植物研究所官网、科学网)

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    2种不同金属材料的力学参数
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    鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
    小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
    多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
    红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
    红菇属 Russula 17 8.13
    栓菌属 Trametes 5 2.39
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