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Considerable progress has been made in the past few years in characterising Arabidopsis nuclear transport receptors and in elucidating plant signal transduction pathways that employ nucleo-cytoplasmic partitioning of a member of the signal transduction chain. This review briefly introduces the major principles of nuclear transport of macromolecules across the nuclear envelope and the proteins involved,...
We characterized the Arabidopsis orthologue of the human nuclear import receptor transportin1 (TRN1). Like the human receptor, Arabidopsis TRN1 recognizes nuclear import signals on proteins that are different from the classical basic nuclear localization signals. The M9 domain of human heterogeneous nuclear ribonucleoprotein A1 (hnRNP A1) is the prototype of such signals. We show that AtTRN1 binds...
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