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- W2018731279 abstract "SUMMARY The 17‐kDa, cysteine‐rich γb protein of Barley stripe mosaic virus (BSMV) is a major contributor to viral pathogenesis, although it is dispensable for replication and movement in the ND 18 strain of the virus. Within the C‐terminal region of γb, six coiled‐coil heptad repeats, structures known to mediate protein–protein interactions, are predicted between amino acids 95 and 140. In this study, we have demonstrated that γb engages in homologous interactions and that the C‐terminal 67 amino acids of the protein are required for these interactions. The γb homologous interactions were abrogated by mutations designed to disrupt the coiled‐coil motifs with substitutions of glycine residues for hydrophobic residues in the a and d positions of the heptads (γbNC). Mutations within the γbNC derivative were also found to destroy the silencing suppression activity of γb in an Agrobacterium ‐mediated transient assay. Infectivity experiments to evaluate the γbNC derivative revealed that this mutant developed symptoms 2 days earlier than the wild‐type strain in Chenopodium amaranticolor . In barley, γbNC elicited more severe bleaching and striping symptoms, similar to those of the previously described ‘bleached’ phenotype that is observed when mutations are introduced into the C1 and BM motifs. These findings collectively show that γb interactions mediated by the coiled‐coil motif are critical for the virulence and counter defence activities of BSMV in both monocot and dicot hosts." @default.
- W2018731279 created "2016-06-24" @default.
- W2018731279 creator A5031387893 @default.
- W2018731279 creator A5084295378 @default.
- W2018731279 date "2004-08-26" @default.
- W2018731279 modified "2023-10-17" @default.
- W2018731279 title "The C-terminal region of the Barley stripe mosaic virusgammab protein participates in homologous interactions and is required for suppression of RNA silencing" @default.
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- W2018731279 doi "https://doi.org/10.1111/j.1364-3703.2004.00246.x" @default.
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