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首页> 外文期刊>Acta crystallographica, Section F. Structural biology and crystallization communications >Crystallization and X-ray diffraction analysis of an antifungal laticifer protein
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Crystallization and X-ray diffraction analysis of an antifungal laticifer protein

机译:抗真菌胶乳蛋白的结晶和X射线衍射分析

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摘要

An osmotin (CpOsm) from the latex of Calotropis procera has been crystallized in both tetragonal and trigonal forms suitable for structure determination. Crystallographic studies of CpOsm are of great interest because limited information is available concerning the structure of latex proteins and CpOsm has previously been shown to interact with the spore membranes of some plant pathogenic fungi, thus impairing spore germination and hyphal growth. CpOsm crystals were grown using 0.1 M HEPES buffer pH 7.5, 26% PEG 4000, 0.2 M ammonium sulfate (space group P4(3)) or using 0.1 M HEPES buffer pH 7.5, 35% MPD, 0.7 M ammonium sulfate (space group P3(1)12). X-ray diffraction data were collected to 2.17 angstrom (P4(3)) and 1.80 angstrom (P3(1)12) resolution and molecular-replacement analyses produced initial phases for both crystal forms.
机译:已将来自Calotropis procera乳胶的渗透素(CpOsm)结晶成适合于结构确定的四方和三方形式。对CpOsm的晶体学研究引起了极大的兴趣,因为关于乳胶蛋白结构的信息有限,以前已经证明CpOsm与某些植物病原性真菌的孢子膜相互作用,从而损害了孢子的萌发和菌丝的生长。使用0.1 M HEPES pH 7.5缓冲液,26%PEG 4000、0.2 M硫酸铵(空间组P4(3))或使用0.1 M HEPES pH 7.5缓冲液,35%MPD,0.7 M硫酸铵(空间组P3)生长CpOsm晶体(1)12)。 X射线衍射数据收集到2.17埃(P4(3))和1.80埃(P3(1)12)分辨率,分子置换分析产生了两种晶体形式的初始相。

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