Functional study of hot pepper 26S proteasome subunit RPN7 induced by Tobacco mosaic virus from nuclear proteome analysis

Boo Ja Lee, Sun Jae Kwon, Sung Kyu Kim, Ki Jeong Kim, Chang Jin Park, Young Jin Kim, Ohkmae K. Park, Kyung Hee Paek

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


Two-dimensional gel electrophoresis (2-DE) was applied for the screening of Tobacco mosaic virus (TMV)-induced hot pepper (Capsicum annuum cv. Bugang) nuclear proteins. From differentially expressed protein spots, we acquired the matched peptide mass fingerprint (PMF) data, analyzed by MALDI-TOF MS, from the non-redundant hot pepper EST protein FASTA database using the VEMS 2.0 software. Among six identified nuclear proteins, the hot pepper 26S proteasome subunit RPN7 (CaRPN7) was subjected to further study. The level of CaRPN7 mRNA was specifically increased during incompatible TMV-P0 interaction, but not during compatible TMV-P1.2 interaction. When CaRPN7::GFP fusion protein was targeted in onion cells, the nuclei had been broken into pieces. In the hot pepper leaves, cell death was exacerbated and genomic DNA laddering was induced by Agrobacterium-mediated transient overexpression of CaPRN7. Thus, this report presents that the TMV-induced CaRPN7 may be involved in programmed cell death (PCD) in the hot pepper plant.

Original languageEnglish
Pages (from-to)405-411
Number of pages7
JournalBiochemical and biophysical research communications
Issue number2
Publication statusPublished - 2006 Dec 15

Bibliographical note

Funding Information:
This study was supported by a Grant (R11-2003-008-02001-0) from the Korea Science and Engineering Foundation to the Plant Signaling Network Research Center. MALDI-TOF analysis was performed at the Korea Basic Science Institute, Seoul branch. We thank Dr. Bae, Jungdon and Mr. Kim, Dooil at KRIBB for communication of this study.


  • CaRPN7
  • EST database
  • Hot pepper
  • Hypersensitive response
  • Nuclear protein
  • Programmed cell death
  • Proteasome
  • Proteomics
  • Subcellular localization
  • TMV

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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