首页> 美国卫生研究院文献>Journal of Virology >Spontaneous mutations affecting the host range of the B77 strain of avian sarcoma virus involve type-specific changes in the virion envelope antigen.
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Spontaneous mutations affecting the host range of the B77 strain of avian sarcoma virus involve type-specific changes in the virion envelope antigen.

机译:影响禽肉瘤病毒B77株宿主范围的自发突变涉及病毒体包膜抗原的类型特异性变化。

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摘要

Previously it was shown that the host-range gene of the Bratislava strain of avain sarcoma virus (B77 virus) spontaneously mutates with a very high rate. The wild-type B77 virus called B77 virus-II, mutates either to virus that efficiently infects duck cells (B77 virus-III) or to virus that does not mutate to the ability to infect duck cells (B77 virus-I) (Zarling and Temin, 1976). No significant differences in either the virion envelope glycoproteins or other major virion proteins were detected by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. However, pseudotypes of B77 virus-I with proteins of a transformation-defective mutant of B77 virus-III formed foci efficiently in duck cells. An alteration in the envelope protein of B77 virus-I was demonstrated by experiments in which B77 firus-I was fused into duck cells with UV-irradiated Sendai virus and formed foci. Neutralization experiments further demonstrated that B77 virus host-range mutants have altered type-specific envelope antigens. Thus, the spontaneous mutations in the host-range gene of B77 virus involve changes in the type-specific virion envelope antigen.
机译:先前已显示,布拉迪斯拉发的肉瘤病毒(B77病毒)布拉迪斯拉发菌株的宿主范围基因自发突变的频率很高。野生型B77病毒称为B77病毒II,会变异为有效感染鸭细胞的病毒(B77病毒III)或变异为不会感染鸭细胞的能力的病毒(B77病毒I)(Zarling and泰明(1976)。通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳未检测到病毒粒子包膜糖蛋白或其他主要病毒粒子蛋白的显着差异。然而,具有B77病毒-III的转化缺陷型突变体的蛋白质的B77病毒-I的假型在鸭细胞中有效地形成了病灶。通过实验证明了B77病毒-I的包膜蛋白的改变,其中将B77 firus-I与紫外线照射的仙台病毒融合到鸭细胞中并形成病灶。中和实验进一步证明,B77病毒宿主范围突变体已改变了类型特异性包膜抗原。因此,B77病毒宿主范围基因中的自发突变涉及类型特异性病毒体包膜抗原的改变。

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