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CRYSTAL STRUCTURE OF AN INTEGRAL MEMBRANE LIGHT-HARVESTING COMPLEX FROM PHOTOSYNTHETIC BACTERIA

机译:光合细菌集成膜光采复合物的晶体结构

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The crystal structure of the light-harvesting antenna complex (LH2) from Rhodopseudomonas acidophila strain 10050 shows that the active assembly consists of two concentric cylinders of helical protein subunits which enclose the pigment molecules. Eighteen bacteriochlorophyll a molecules sandwiched between the helices form a continuous overlapping ring, and a further nine are positioned between the outer helices with the bacteriochlorin rings perpendicular to the transmembrane helix axis. There is an elegant intertwining of the bacteriochlorophyll phytol chains with carotenoid, which spans the complex. [References: 25]
机译:嗜酸红假单胞菌菌株10050的光收集天线复合物(LH2)的晶体结构表明,该活性组件由两个同心圆柱状的螺旋蛋白亚基组成,它们包围着色素分子。夹在螺旋之间的十八个细菌叶绿素a分子形成一个连续的重叠环,另外九个位于外螺旋之间,细菌绿素环垂直于跨膜螺旋轴。细菌叶绿素的植物醇链与类胡萝卜素之间形成优雅的交织,横跨整个复合体。 [参考:25]

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