Article · Wikipedia archive · Last revised Jun 14, 2026

Epstein–Barr virus nuclear antigen 3

The Epstein–Barr virus nuclear antigen 3 (EBNA-3) is a family of viral proteins associated with the Epstein–Barr virus. A typical EBV genome contains three such proteins:EBNA-3A EBNA-3B EBNA-3C

Last revised
Jun 14, 2026
Read time
≈ 1 min
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232 w
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Source
Epstein–Barr virus nuclear antigen 3
Identifiers
SymbolEBV-NA3
PfamPF05009
InterProIPR007706
SCOP21m05 / SCOPe / SUPFAM
Available protein structures:
PDB  IPR007706 PF05009 (ECOD; PDBsum)  
AlphaFold

The Epstein–Barr virus nuclear antigen 3 (EBNA-3) is a family of viral proteins associated with the Epstein–Barr virus. A typical EBV genome contains three such proteins:1

  • EBNA-3A (P12977, EBNA-3; BLRF3-BERF1)
  • EBNA-3B (P03203, EBNA-4; BERF2A-BERF2B)
  • EBNA-3C (P03204, EBNA-6, EBNA-4B; BERF3-BERF4)

These genes also bind the host RBP-Jκ protein.2

EBNA-3C can recruit a ubiquitin ligase and has been shown to target cell-cycle regulators such as retinoblastoma protein (pRb).34

References

References