Interaction between viral proteins with the transmission of Potyvirus

Potyviridae is the largest family in plant viruses, in which a group of potyviruses constitutes a very important role in causing diseases in plants. The organisation of the viral genome is positive-sense RNA, ranging in size from 9000 to 12000?bp. The viral genome encodes a large polyprotein that is processed by three virus-encoded proteinases (two proteinases and helper component proteinase) to yield the mature products. This review concentrates on the interaction between viral proteins with the transmission of Potyvirus. Transmission and long-distance movement of Potyvirus is only possible through vector and that time interaction between two viral proteins takes place, named as helper component-proteinase and coat protein. Interaction between NIb, NIa, 6K2 as well as with CI (helicase activity) also involved in the replication of potyviruses. Some researchers developed a yeast two-hybrid system and biomolecular fluorescence complementation system technology which proved the interaction among the viral protein. At last all proteins are correlated with each other and play a very significant role in the transmission of Potyvirus.