水稻东格鲁杆状病毒基因II产物与病毒基因III多聚蛋白的衣壳蛋白结构域相互作用。
The rice tungro bacilliform virus gene II product interacts with the coat protein domain of the viral gene III polyprotein.
作者信息
Herzog E, Guerra-Peraza O, Hohn T
机构信息
Friedrich Miescher Institute, CH-4002 Basel, Switzerland.
出版信息
J Virol. 2000 Mar;74(5):2073-83. doi: 10.1128/jvi.74.5.2073-2083.2000.
Abstract
Rice tungro bacilliform virus (RTBV) is a plant pararetrovirus whose DNA genome contains four genes encoding three proteins and a large polyprotein. The function of most of the viral proteins is still unknown. To investigate the role of the gene II product (P2), we searched for interactions between this protein and other RTBV proteins. P2 was shown to interact with the coat protein (CP) domain of the viral gene III polyprotein (P3) both in the yeast two-hybrid system and in vitro. Domains involved in the P2-CP association have been identified and mapped on both proteins. To determine the importance of this interaction for viral multiplication, the infectivity of RTBV gene II mutants was investigated by agroinoculation of rice plants. The results showed that virus viability correlates with the ability of P2 to interact with the CP domain of P3. This study suggests that P2 could participate in RTBV capsid assembly.
摘要
水稻东格鲁杆状病毒（RTBV）是一种植物类逆转录病毒，其DNA基因组包含四个基因，编码三种蛋白质和一种大的多聚蛋白。大多数病毒蛋白的功能仍不清楚。为了研究基因II产物（P2）的作用，我们寻找了该蛋白与其他RTBV蛋白之间的相互作用。在酵母双杂交系统和体外实验中，P2均被证明与病毒基因III多聚蛋白（P3）的衣壳蛋白（CP）结构域相互作用。已鉴定出参与P2-CP结合的结构域，并在两种蛋白质上进行了定位。为了确定这种相互作用对病毒增殖的重要性，通过对水稻植株进行农杆菌接种来研究RTBV基因II突变体的感染性。结果表明，病毒活力与P2与P3的CP结构域相互作用的能力相关。这项研究表明，P2可能参与RTBV衣壳组装。
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