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Potato virus X RNA-mediated assembly of single-tailed ternary 'coat protein-RNA-movement protein' complexesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Karpova O.V., Zayakina O.V., Arkhipenko M.V., Sheval E.V., Kiselyova O.I., Poljakov V.Yu, Yaminsky I.V., Rodionova N.P., Atabekov J.G.
- Журнал: Journal of General Virology
- Том: 87
- Год издания: 2006
- Издательство: Society for General Microbiology
- Местоположение издательства: United Kingdom
- Первая страница: 2731
- Последняя страница: 2740
- DOI: 10.1099/vir.0.81993-0
- Аннотация: Different models have been proposed for the nature of the potexvirus transport form that moves from cell to cell over the infected plant: (i) genomic RNA moves as native virions; or (ii) in vitro-assembled non-virion ribonucleoprotein (RNP) complexes consisting of viral RNA, coat protein (CP) and movement protein (MP), termed TGBp1, serve as the transport form in vivo. As the structure of these RNPs has not been elucidated, the products assembled in vitro from potato virus X (PVX) RNA, CP and TGBp1 were characterized. The complexes appeared as single-tailed particles (STPs) with a helical, head-like structure composed of CP subunits located at the 5'-proximal region of PVX RNA; the TGBp1 was bound to the terminal CP molecules of the head. Remarkably, no particular non-virion RNP complexes were observed. These data suggest that the CP-RNA interactions resulting in head formation prevailed over TGBp1-RNA binding upon STP assembly from RNA, CP and TGBp1. STPs could be assembled from the 5' end of PVX RNA and CP in the absence of TGBp1. The translational ability of STPs was characterized in a cell-free translation system. STPs lacking TGBp1 were entirely non-translatable; however, they were rendered translatable by binding of TGBp1 to the end of the head. It is suggested that the RNA-mediated assembly of STPs proceeds via two steps. Firstly, non-translatable CP-RNA STPs are produced, due to encapsidation of the 5'-terminal region. Secondly, the TGBp1 molecules bind to the end of a polar head, resulting in conversion of the STPs into a translatable form.
- Добавил в систему: Шеваль Евгений Валерьевич