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Abstract
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Tobacco mosaic virus movement protein associates with the cytoskeleton in tobacco cells.

B G McLean, J Zupan, P C Zambryski
B G McLean
Department of Plant Biology, University of California-Berkeley 94720-3102, USA.
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J Zupan
Department of Plant Biology, University of California-Berkeley 94720-3102, USA.
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P C Zambryski
Department of Plant Biology, University of California-Berkeley 94720-3102, USA.
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Published December 1995. DOI: https://doi.org/10.1105/tpc.7.12.2101

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  • Copyright © 1995 by American Society of Plant Biologists

Abstract

Tobacco mosaic virus movement protein P30 complexes with genomic viral RNA for transport through plasmodesmata, the plant intercellular connections. Although most research with P30 focuses on its targeting to and gating of plasmodesmata, the mechanisms of P30 intracellular movement to plasmodesmata have not been defined. To examine P30 intracellular localization, we used tobacco protoplasts, which lack plasmodesmata, for transfection with plasmids carrying P30 coding sequences under a constitutive promoter and for infection with tobacco mosaic virus particles. In both systems, P30 appears as filaments that colocalize primarily with microtubules. To a lesser extent, P30 filaments colocalize with actin filaments, and in vitro experiments suggested that P30 can bind directly to actin and tubulin. This association of P30 with cytoskeletal elements may play a critical role in intracellular transport of the P30-viral RNA complex through the cytoplasm to and possibly through plasmodesmata.

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Tobacco mosaic virus movement protein associates with the cytoskeleton in tobacco cells.
B G McLean, J Zupan, P C Zambryski
The Plant Cell Dec 1995, 7 (12) 2101-2114; DOI: 10.1105/tpc.7.12.2101

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Tobacco mosaic virus movement protein associates with the cytoskeleton in tobacco cells.
B G McLean, J Zupan, P C Zambryski
The Plant Cell Dec 1995, 7 (12) 2101-2114; DOI: 10.1105/tpc.7.12.2101
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The Plant Cell
Vol. 7, Issue 12
Dec 1995
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