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Groundnut Bud Necrosis Virus Encoded NSm Associates with Membranes via Its C-Terminal Domain

Singh, Pratibha and Indi, Shantinath S and Savithri, Handanahal S (2014) Groundnut Bud Necrosis Virus Encoded NSm Associates with Membranes via Its C-Terminal Domain. In: PLOS ONE, 9 (6).

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Official URL: http://dx.doi.org/ 10.1371/journal.pone.0099370

Abstract

Groundnut Bud Necrosis Virus (GBNV) is a tripartite ambisense RNA plant virus that belongs to serogroup IV of Tospovirus genus. Non-Structural protein-m (NSm), which functions as movement protein in tospoviruses, is encoded by the M RNA. In this communication, we demonstrate that despite the absence of any putative transmembrane domain, GBNV NSm associates with membranes when expressed in E. coli as well as in N. benthamiana. Incubation of refolded NSm with liposomes ranging in size from 200-250 nm resulted in changes in the secondary and tertiary structure of NSm. A similar behaviour was observed in the presence of anionic and zwitterionic detergents. Furthermore, the morphology of the liposomes was found to be modified in the presence of NSm. Deletion of coiled coil domain resulted in the inability of in planta expressed NSm to interact with membranes. Further, when the C-terminal coiled coil domain alone was expressed, it was found to be associated with membrane. These results demonstrate that NSm associates with membranes via the C-terminal coiled coil domain and such an association may be important for movement of viral RNA from cell to cell.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the authors.
Department/Centre: Division of Biological Sciences > Biochemistry
Division of Biological Sciences > Microbiology & Cell Biology
Depositing User: Id for Latest eprints
Date Deposited: 13 Aug 2014 11:58
Last Modified: 14 Aug 2014 06:51
URI: http://eprints.iisc.ac.in/id/eprint/49642

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