Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 53, Issue 373, Pages 1531-1532Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jexbot/53.373.1531
Keywords
movement protein; multiprotein bridging factor 1; tomato mosaic virus; transcriptional coactivator
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Viral movement through plasmodesmata in host plants depends on the interaction between virus-encoded movement protein (MP) and host proteins. To search for MP-interacting protein (MIP), far-western screening of a tobacco cDNA library was carried out using a recombinant MP of tomato mosaic virus (ToMV) as a probe. One of the positive cDNA clones, designated MIP204, was highly homologous to a class of transcriptional coactivators commonly referred to as multiprotein bridging factor 1 (MBF1). ToMV MP could also bind to the Arabidopsis homologues of MBF1. The recombinant MIP204 bound to MPs of ToMV and a crucifer tobamovirus CTMV-W, but not of cucumber mosaic virus. MPs of ToMV and the related virus may interact with MBF1-like proteins to modulate host gene expression.
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