Epstein-Barr virus latent membrane protein 2A blocks calcium mobilization in B lymphocytes

Cheryl L. Miller, Richard Longnecker, Elliott Kieff*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

118 Scopus citations


LMP2A is expressed in latent Epstein-Barr virus (EBV) infection and interacts with LMP1 and members of the src tyrosine kinase family in the plasma membrane. Since tyrosine kinases mediate receptor-induced changes in intracellular free calcium, the effect of LMP2A on receptor-mediated intracellular calcium mobilization was evaluated by stably expressing LMP2A in an EBV-negative Burkitt tumor cell line (BJAB) or in LMP1-converted BJAB cells. LMP2A significantly blocked calcium mobilization following class II, CD19, or immunoglobulin M cross-linking. LMP2A effects were partially reversed in LMP1-converted cell lines. These results are compatible with LMP2A acting in latent B-lymphocyte infection to downmodulate LMP1 effects on cell growth or to inhibit induction of lytic EBV infection in specific human tissues following receptor ligation.

Original languageEnglish (US)
Pages (from-to)3087-3094
Number of pages8
JournalJournal of virology
Issue number6
StatePublished - 1993

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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