【摘要】 耶尔森氏菌外膜蛋白（Ｙｏｐｓ）在菌体中所占比例甚小，因而提取与纯化均有一定难度，国内尚无成功的先例。我们使用了一种盐析加电泳的方法提取了Ｙｏｐ１蛋白。实验结果表明，该法简便、易行且重复性好、回收率高。使用本法提取假结核耶氏菌外膜蛋白１（Ｙｏｐ１），自每升培基增殖的菌体中（约４．５ｇ湿重），可获得纯品６．３ｍｇ，回收率高于国外同类研究的６倍以上［１］。一次性提取的Ｙｏｐ１蛋白在十二烷基磺酸钠－聚丙烯酰胺凝胶电泳（ＳＤＳ－ＰＡＧＥ）中共显示出三条可辩认的蛋白带，其分子量依次为１５０ＫＤ，９０～１００ＫＤ及４５～５０ＫＤ。进一步的尿素－十二烷基磺酸钠－聚丙烯酰胺凝胶电泳结果表明，样品中的约１００ＫＤ和５０ＫＤ两种蛋白实际为１５０ＫＤ蛋白解聚后的二聚体和单体，根据这一结果，推测该种蛋白系三聚体，其单体分子量为４５～５０ＫＤ。更多还原

【Abstract】 ecause the proportion of Yersinia Outer membrane Proteins(Yops)is quite small in the bacteriumproteins,its purification is difficut and it had not been purified successfully in this country before,We purifiedthis protein by the method of salting out plus electrophoresis.The result showed that this method is simple,easy to handle,stable and with high recovery rate.The gain of pure protein 1 from 1 litre culture was 6.3mg.It Would show 3 visual bends on SDS PAGE gel and their molecular weight were 150,90～100 and 45～50KD respectively.It was deduced that the subunit molecular weight of this protein was 45～50 KD and the 150and 90～100 KD bends were represent their duplet and triplet forms respectively.更多还原