Possible role of the Nt-4/1 protein in macromolecular transport in vascular tissue.

Andrey G Solovyev, Svetlana S Makarova, Margarita V Remizowa, Hyoun-Sub Lim, John Hammond, Robert A Owens, Lilya Kopertekh, Joachim Schiemann, Sergey Y Morozov

Plant signaling & behavior 2013 Oct

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The Arabidopsis thaliana 4/1 (At-4/1) protein has a highly α-helical structure with potential to interact both with itself and other protein ligands, including the movement proteins of some plant viruses; the Nicotiana tabacum ortholog (Nt-4/1) has similar structure. Here we describe localization of GUS expression in transgenic N. tabacum seedlings under control of the Nt-4/1 promoter, which indicates that transcription is associated with the veins at certain developmental stages, and especially in the hypocotyl. Viroid accumulation and movement was altered in plants in which 4/1 expression was reduced by virus-induced gene silencing. These localization studies support a role of 4/1 in signaling in the vasculature,including mobility of pathogen-related and cellular RNAs.

Citation

Andrey G Solovyev, Svetlana S Makarova, Margarita V Remizowa, Hyoun-Sub Lim, John Hammond, Robert A Owens, Lilya Kopertekh, Joachim Schiemann, Sergey Y Morozov. Possible role of the Nt-4/1 protein in macromolecular transport in vascular tissue. Plant signaling & behavior. 2013 Oct;8(10):doi: 10.4161/psb.25784