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- W2022285419 abstract "Messenger RNAs were once thought to be confined to the cell where they were born, but in plants some mRNAs get out and about 1 Jorgensen R.A. et al. An RNA-based information superhighway in plants. Science. 1998; 279: 1486-1487 Crossref PubMed Scopus (189) Google Scholar . How they achieve this feat is now becoming clearer. It has been known for some time that the RNA of plant viruses move from cell to cell through the plasmodesmata (the plant equivalent of a gap junction). The puzzle was that the gaps in the junction did not seem large enough. The problem was solved when it turned out that viruses contained genes encoding specialized proteins (movement proteins) that enlarged plasmodesmata allowing viral RNA (bound to the movement protein) to pass through. Reasoning that plant viruses had evolved to exploit a pre-existing vehicle used by peripatetic plant mRNAs, Bill Lucas and his colleagues 2 Xoconostle-Cázares B. et al. Plant paralog to viral movement protein that potentiates transport of mRNA into the phloem. Science. 1999; 283: 94-98 Crossref PubMed Scopus (380) Google Scholar looked in pumpkin for the plant equivalent of viral movement proteins. The CmPP16 protein binds to RNA not DNA, and microinjection of CmPP16 together with passenger mRNA moves both through the plasmodesmata into the adjacent cell. In situ localization of CmPP16 mRNA shows it is predominantly located in the sieve element companion cells (which are connected to the phloem by plasmodesmata). The protein is just the other side on the phloem wall like a taxi waiting to pick up a fare: indeed after cucumber plants are grafted onto pumpkin root stock the pumpkin CmPP16 is detectable in cucumber phloem. Taken together these results strongly suggest that plant paralog of the viral movement protein carries RNA around the plant, now we know how the RNA moves, the question is why?" @default.
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- W2022285419 date "1999-05-01" @default.
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- W2022285419 title "Hailing a taxi on the plant RNA superhighway" @default.
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- W2022285419 doi "https://doi.org/10.1016/s0168-9525(99)01756-4" @default.
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