The P2 of Wheat yellow mosaic virus rearranges the endoplasmic reticulum and recruits other viral proteins into replication-associated inclusion bodies

Liying Sun, Andika Ida Bagus, Jiangfeng Shen, Di Yang, Jianping Chen

Research output: Contribution to journalArticle

10 Citations (Scopus)


Summary: Viruses commonly modify host endomembranes to facilitate biological processes in the viral life cycle. Infection by viruses belonging to the genus Bymovirus (family Potyviridae) has long been known to induce the formation of large membranous inclusion bodies in host cells, but their assembly and biological roles are still unclear. Immunoelectron microscopy of cells infected with the bymovirus Wheat yellow mosaic virus (WYMV) showed that P1, P2 and P3 are the major viral protein constituents of the membranous inclusions, whereas NIa-Pro (nuclear inclusion-a protease) and VPg (viral protein genome-linked) are probable minor components. P1, P2 and P3 associated with the endoplasmic reticulum (ER), but only P2 was able to rearrange ER and form large aggregate structures. Bioinformatic analyses and chemical experiments showed that P2 is an integral membrane protein and depends on the active secretory pathway to form aggregates of ER membranes. Inplanta and invitro assays demonstrated that P2 interacts with P1, P3, NIa-Pro or VPg and recruits these proteins into the aggregates. InvivoRNA labelling using WYMV-infected wheat protoplasts showed that the synthesis of viral RNAs occurs in the P2-associated inclusions. Our results suggest that P2 plays a major role in the formation of membranous compartments that house the genomic replication of WYMV.

Original languageEnglish
Pages (from-to)466-478
Number of pages13
JournalMolecular Plant Pathology
Issue number5
Publication statusPublished - 2014
Externally publishedYes



  • Endoplasmic reticulum
  • Protein localization
  • Rearrange
  • Replication-associated inclusion bodies
  • Wheat yellow mosaic virus

ASJC Scopus subject areas

  • Plant Science
  • Agronomy and Crop Science
  • Soil Science
  • Molecular Biology
  • Medicine(all)

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