PMID: 15359133Sep 11, 2004Paper

A protein interaction map of soybean mosaic virus strain G7H based on the yeast two-hybrid system

Molecules and Cells
Sung-Hwan KangKook-Hyung Kim

Abstract

A protein interaction map of Soybean mosaic virus (SMV) strain G7H was generated by the yeast two-hybrid system. Clones encoding the genes P1, HC-Pro, P3, 6K1, CI, 6K2, VPg, NIa, NIb, and CP were fused downstream of the GAL4 binding domain (GAL4-BD) and of the GAL4 activation domain (GAL4-AD). The GAL4-BD and GAL4-AD fusion derivatives of each gene were co-transformed into yeast and transformants in which interaction took place were identified on selective media. Interacting fusion proteins were extracted from the yeast cells, run on SDS-PAGE gels and finally checked by Western blotting with GAL4 polyclonal antibodies. Strong interactions were detected between the pairs CP/CP, HC-Pro/HC-Pro, NIa/NIa, and CP/HC-Pro. Relatively weak but significant interaction was detected between VPg and NIa. Although not all of the protein-protein interactions previously reported in other potyviruses were detected, the interactions revealed here were, in general, similar to those reported previously.

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