Chapter title |
Latent Membrane Protein 2 (LMP2)
|
---|---|
Chapter number | 5 |
Book title |
Epstein Barr Virus Volume 2
|
Published in |
Current topics in microbiology and immunology, January 2015
|
DOI | 10.1007/978-3-319-22834-1_5 |
Pubmed ID | |
Book ISBNs |
978-3-31-922833-4, 978-3-31-922834-1
|
Authors |
Osman Cen, Richard Longnecker |
Abstract |
LMP2A is an EBV-encoded protein with three domains: (a) an N-terminal cytoplasmic domain, which has PY motifs that bind to WW domain-containing E3 ubiquitin ligases and an ITAM that binds to SH2 domain-containing proteins, (b) a transmembrane domain with 12 transmembrane segments that localizes LMP2A in cellular membranes, and (c) a 27-amino acid C-terminal domain which mediates homodimerization and heterodimerization of LMP2 protein isoforms. The most prominent two isoforms of the protein are LMP2A and LMP2B. The LMP2B isoform lacks the 19-amino acid N-terminal domain found in LMP2A, which modulates cellular signaling resulting in a baseline activation of B cells and degradation of cellular kinases leading to the downregulation of normal B cell signaling pathways. These two seemingly contradictory processes allow EBV to establish and maintain latency. LMP2 is expressed in many EBV-associated malignancies. While its antigenic properties may be useful in developing LMP2-specific immunity, the LMP2A N-terminal motifs also provide a basis to target LMP2A-modulated cellular kinases for the development of treatment strategies. |
Mendeley readers
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Demographic breakdown
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