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Epstein-Barr virus-encoded microRNA miR-BART2 down-regulates the viral DNA polymerase BALF5.
Nucleic Acids Res. 36, 666-675 (2008)
MicroRNAs (miRNAs) have been implicated in sequence-specific cleavage, translational repression or deadenylation of specific target mRNAs resulting in post-transcriptional gene silencing. Epstein-Barr virus (EBV) encodes 23 miRNAs of unknown function. Here we show that the EBV-encoded miRNA miR-BART2 down-regulates the viral DNA polymerase BALF5. MiR-BART2 guides cleavage within the 3'-untranslated region (3'UTR) of BALF5 by virtue of its complete complementarity to its target. Induction of the lytic viral replication cycle results in a reduction of the level of miR-BART2 with a strong concomitant decrease of cleavage of the BALF5 3'UTR. Expression of miR-BART2 down-regulates the activity of a luciferase reporter gene containing the BALF5 3'UTR. Forced expression of miR-BART2 during lytic replication resulted in a 40-50% reduction of the level of BALF5 protein and a 20% reduction of the amount of virus released from EBV-infected cells. Our results are compatible with the notion that EBV-miR-BART2 inhibits transition from latent to lytic viral replication.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
LATENCY-ASSOCIATED TRANSCRIPT; MOTOR-NEURON PROTEIN; NUCLEAR ANTIGEN-2; MESSENGER-RNA; GENE; DIFFERENTIATION; IDENTIFICATION; MECHANISMS; ARGONAUTE2; CLEAVAGE
Language
english
Publication Year
2008
HGF-reported in Year
0
ISSN (print) / ISBN
0305-1048
e-ISSN
1362-4962
Journal
Nucleic Acids Research
Quellenangaben
Volume: 36,
Issue: 2,
Pages: 666-675
Publisher
Oxford University Press
Reviewing status
Peer reviewed
Institute(s)
Institute of Molecular Immunology (IMI)
PSP Element(s)
G-501700-003
PubMed ID
18073197
WOS ID
000253021600031
Scopus ID
39149129648
Erfassungsdatum
2008-11-21