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  • Title: Phosphorylation of tobacco mosaic virus movement protein abolishes its translation repressing ability.
    Author: Karpova OV, Rodionova NP, Ivanov KI, Kozlovsky SV, Dorokhov YL, Atabekov JG.
    Journal: Virology; 1999 Aug 15; 261(1):20-4. PubMed ID: 10441552.
    Abstract:
    Previously we showed that the ribonucleoprotein complexes (RNPs) of the TMV 30-kDa movement protein (MP) with TMV RNA are nontranslatable in vitro and noninfectious to protoplasts, but are infectious to intact plants. It has been suggested that MP-TMV RNA complexes could be converted into the translatable and replicatable form in planta in the course of passage through plasmodesmata (Karpova et al., 1997, Virology 230, 11-21). The role of TMV MP phosphorylation was investigated in terms of its capacity to modulate the translation-repressing ability of the MP. Phosphorylation of the TMV MP, either before or after RNP complex formation, caused a conversion of nontranslatable MP-RNA complexes into a form that was translatable in vitro and infectious to protoplasts and plants.
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