4.4 Article

Virulence domain of the RYMV genome-linked viral protein VPg towards rice rymv1-2-mediated resistance

Journal

ARCHIVES OF VIROLOGY
Volume 153, Issue 6, Pages 1161-1164

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SPRINGER WIEN
DOI: 10.1007/s00705-008-0087-9

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Virulent variants of Rice yellow mottle virus (genus Sobemovirus) can emerge on the highly resistant rice cultivars Gigante and Bekarosaka. Non-synonymous mutations responsible for the breakdown of the recessive resistance gene rymv1-2 were located in the VPg after determination of its termini in the polyprotein P2a. The secondary structure of this protein was predicted to include a central alpha-helix. The two major amino acids related to virulence are located on the same side of this helix. The 3D topology and the biochemical properties of virulence mutations both suggested a direct site-to-site interaction between RYMV VPg and rice eIF(iso)4G encoded by rymv1.

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