Document Detail

The long terminal repeats of a murine retrovirus encode a trans-activator for cellular genes.
MedLine Citation:
PMID:  8051046     Owner:  NLM     Status:  MEDLINE    
Type C RNA leukemia viruses cause lymphoid neoplasia after an extended latent period by an unknown mechanism. Infection of human or murine cells with murine leukemia viruses rapidly increases the expression of genes belonging to the immunoglobulin superfamily and involved in T-lymphocyte activation, including the class I major histocompatibility complex antigens. We report here that the long terminal repeat (LTR) of Moloney murine leukemia virus encodes a novel trans-activator, which induces transcription and expression of class I major histocompatibility complex genes. The portion of the LTR responsible for trans-activation lies within the U3 region and can be excised from the LTR while maintaining its activity. Analysis of the U3 region of the LTR and its flanking sequences suggests that functional or regulatory elements for the trans-activity exist between nucleotides 32 and 219 of the LTR sequences. The region of the LTR identified here as important in trans-activation has been shown recently to be a critical determinant of leukemogenicity and latency of Moloney murine leukemia virus. These findings suggest a novel mechanism of retrovirus-induced activation of cellular gene expression, potentially contributing to leukemogenesis.
S Y Choi; D V Faller
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of biological chemistry     Volume:  269     ISSN:  0021-9258     ISO Abbreviation:  J. Biol. Chem.     Publication Date:  1994 Aug 
Date Detail:
Created Date:  1994-09-08     Completed Date:  1994-09-08     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985121R     Medline TA:  J Biol Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  19691-4     Citation Subset:  IM    
Cancer Research Center, Boston University School of Medicine, Massachusetts 02118.
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MeSH Terms
3T3 Cells
DNA, Viral
Gene Expression
Mice, Inbred BALB C
Moloney murine leukemia virus / genetics*
Repetitive Sequences, Nucleic Acid*
Trans-Activators / genetics*
Transcriptional Activation
Reg. No./Substance:
0/DNA, Viral; 0/Trans-Activators

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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