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Defective mutant of Sindbis virus with a smaller-molecular-weight form of the E1 glycoprotein.

机译:SINDBIS病毒的突变突变体具有较小分子量的E1糖蛋白的形式。

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We have isolated from a single plaque a mutant of Sindbis virus characterized by an E1 glycoprotein with higher electrophoretic mobility. This higher mobility is not attributable to a different extent of glycosylation of the protein nor to an altered proteolytic maturation pathway of the polypeptide precursor, but is the result of a deletion occurring during the replication of the viral RNA. The 26S RNA (the messenger for the Sindbis structural proteins) extracted from cells infected with the mutant is about 0.75 x 10(5) daltons smaller than the 26S RNA from the parental strain. As a consequence, in cells infected with the mutant, an E1 glycoprotein is synthesized with a polypeptide chain about 70 amino acids shorter. The biological relevance of this naturally occurring deletion of the viral genome is discussed.
机译:我们已经从单个斑块中分离出来的Sindbis病毒的突变体,其特征在于具有较高电泳迁移率的E1糖蛋白。该较高的迁移率不归因于蛋白质的糖基化的不同程度,也不是多肽前体的改变的蛋白水解成熟途径,而是在病毒RNA复制期间发生的缺失的结果。从感染突变体感染的细胞中提取的26s RNA(SINDBIS结构蛋白的信使)是约0.75×10(5)高尔顿,小于来自亲本菌株的26s RNA。因此,在感染突变体的细胞中,用约70个氨基酸短的多肽链合成E1糖蛋白。讨论了这种天然存在的病毒基因组的生物学相关性。

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