Physiological function of NbRanBP1 in Nicotiana benthamiana

Hui Kyung Cho, Jong A. Park, Hyun Sook Pai

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


This study addresses the physiological functions of the Ran-binding protein homolog NbRanBP1 in Nicotiana benthamiana. Virus-induced gene silencing (VIGS) of NbRanBP1 caused stunted growth, leaf yellowing, and abnormal leaf morphology. The NbRanBP1 gene was constitutively expressed in diverse tissues and an NbRanBP1:GFP fusion protein was primarily localized to the nuclear rim and the cytosol. BiFC analysis revealed in vivo interaction between NbRanBP1 and NbRan1 in the nuclear envelope and the cytosol. Depletion of NbRanBP1 or NbRan1 reduced nuclear accumulation of a NbBTF3:GFP marker protein. In the later stages of development, NbRanBP1 VIGS plants showed stress responses such as reduced mitochondrial membrane potential, excessive production of reactive oxygen species, and induction of defense-related genes. The molecular role of RanBP1 in plants is discussed in comparison with RanBP1 function in yeast and mammals.

Original languageEnglish
Pages (from-to)270-277
Number of pages8
JournalMolecules and cells
Issue number3
Publication statusPublished - 2008 Sept 30

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology


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