The challenge of viral snRNPs

N. K. Conrad, V. Fok, D. Cazalla, S. Borah, J. A. Steitz

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Some gammaherpesviruses encode nuclear noncoding RNAs (ncRNAs) that assemble with host proteins. Their conservation and abundance implies that they serve important functions for the virus. This paper focuses on our studies of three classes of nuclear noncoding herpesvirus RNAs. (1) EBERs 1 and 2 are expressed by Epstein-Barr virus in latent infection of human B lymphocytes. Recent studies revealed three sites on EBER1 that associate with ribosomal protein L22. In addition, heterokaryon assays have definitively shown that both EBERs are confined to the nucleus, arguing that their contribution to viral latency is purely nuclear. (2) HSURs 1-7 are U RNAs encoded by Herpesvirus saimiri, which causes aggressive T-cell leukemias and lymphomas. Comparison of monkey T cells transformed with wild-type or mutant virus lacking HSURs 1 and 2 revealed significant changes in host mRNAs implicated in T-cell signaling. (3) PAN is a 1-kb polyadenylated RNA that accumulates in the nucleus of Kaposi's sarcoma-associated herpesvirus lytically infected cells. A novel element, the ENE, is essential for its high accumulation. Recent results indicate that the ENE functions to counteract poly(A)-dependent RNA degradation, which we propose contributes to nuclear surveillance of mRNA transcripts in mammalian cells. Continuing studies of these viral RNAs will provide insights into both cellular and viral gene expression

Original languageEnglish (US)
Pages (from-to)377-384
Number of pages8
JournalCold Spring Harbor Symposia on Quantitative Biology
Volume71
DOIs
StatePublished - 2006

Fingerprint

T-cells
Viruses
RNA
Nuclear RNA
Untranslated RNA
Messenger RNA
T-lymphocytes
Cell signaling
Saimiriine herpesvirus 2
Poly A
Lymphocytes
Saimiriine Herpesvirus 2
Human herpesvirus 8
Ribosomal Proteins
Viral RNA
Virus Latency
heterokaryon
T-Lymphocytes
T-Cell Leukemia
Gene expression

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Biochemistry
  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

The challenge of viral snRNPs. / Conrad, N. K.; Fok, V.; Cazalla, D.; Borah, S.; Steitz, J. A.

In: Cold Spring Harbor Symposia on Quantitative Biology, Vol. 71, 2006, p. 377-384.

Research output: Contribution to journalArticle

Conrad, N. K. ; Fok, V. ; Cazalla, D. ; Borah, S. ; Steitz, J. A. / The challenge of viral snRNPs. In: Cold Spring Harbor Symposia on Quantitative Biology. 2006 ; Vol. 71. pp. 377-384.
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