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Retroviral DNA Integration: ASLV, HIV, and MLV Show Distinct Target Site Preferences

Open access
Mitchell, Rick S, Beitzel, Brett F, Schroder, Astrid R. W, Shinn, Paul, Chen, Huaming, Berry, Charles C, Ecker, Joseph R, Bushman, Frederic D·2004·PLoS Biology

Abstract

The completion of the human genome sequence has made possible genome-wide studies of retroviral DNA integration. Here we report an analysis of 3,127 integration site sequences from human cells. We compared retroviral vectors derived from human immunodeficiency virus (HIV), avian sarcoma-leukosis virus (ASLV), and murine leukemia virus (MLV). Effects of gene activity on integration targeting were assessed by transcriptional profiling of infected cells. Integration by HIV vectors, analyzed in two primary cell types and several cell lines, strongly favored active genes. An analysis of the effects of tissue-specific transcription showed that it resulted in tissue-specific integration targeting by HIV, though the effect was quantitatively modest. Chromosomal regions rich in expressed genes were favored for HIV integration, but these regions were found to be interleaved with unfavorable regions at CpG islands. MLV vectors showed a strong bias in favor of integration near transcription start sites, as reported previously. ASLV vectors showed only a weak preference for active genes and no preference for transcription start regions. Thus, each of the three retroviruses studied showed unique integration site preferences, suggesting that virus-specific binding of integration complexes to chromatin features likely guides site selection.

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Crossref · 10.1371/journal.pbio.0020234

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Metadata

Authors
Mitchell, R. S., Beitzel, B. F., Schroder, A. R. W., Shinn, P., Chen, H., Berry, C. C., Ecker, J. R., & Bushman, F. D.
Venue
PLoS Biology
Published
2004-08-17
Volume
2
Issue
8
Pages
e234
ISSN
  • 1544-9173 (ISSN-L)
  • 1545-7885
OpenAlex
W2046156611
Cited by
976
References
6
FWCI
34.35
Type
journal article
Language
en
Open access
gold

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