Cited by 468HIV Research and TreatmentVirus-based gene therapy researchGenomics and Chromatin Dynamics

The site of HIV-1 integration in the human genome determines basal transcriptional activity and response to Tat transactivation

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Jordan, Albert, Defechereux, Patricia, Verdin, Eric·2001·The EMBO Journal

Abstract

Because of the heterogeneity of chromatin, the site of integration of human immunodeficiency virus (HIV) in the genome could have dramatic effects on its transcriptional activity. We have used an HIV-1-derived retroviral vector, in which the green fluorescent protein is under the control of the HIV promoter, to generate by infection 34 Jurkat clonal cell lines each containing a single integration of the HIV-1 vector. In the absence of Tat, a 75-fold difference in expression level between the highest and lowest expressing clones was observed. Basal promoter activity was low in 80% of the clones and moderate to high in the remaining 20% of clones. We found that differences in expression levels are due to the integration site and are not controlled by DNA methylation or histone acetylation. Tat activated transcription in each clone, and an inverse correlation was observed between basal transcriptional activity and inducibility by Tat. These observations demonstrate that the chromatin environment influences basal HIV gene expression and that the HIV Tat protein activates transcription independently of the chromatin environment.

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Crossref · 10.1093/emboj/20.7.1726

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  • Certain retroviruses such as HIV tend to target gene-rich, transcriptionally active, euchromatic regions within the host chromosome for integration.

    “However, it is now becoming clearer that certain retroviruses like HIV tend to target gene-rich, transcriptionally active, euchromatic regions within the host’s chromosome to integrate.”

    From Beyond reverse transcription: molecular mechanisms and emerging paradigms in retroviral replication (2026) · cites this paper as Jordan et al. 2001

    The Introduction reports that a study of 61 HIV-1 integration sites found no preferential integration near or within transcription units, contrary to the claim that HIV tends to target gene-rich, transcriptionally active regions. It also reports that integration was disfavored in centromeric heterochromatin, but that narrower observation does not establish the claimed preference. (LLM, conf=0.86)

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  • Integrating at a specific site can enhance or repress transcription of integrated proviral DNA; integration in transcriptionally active regions can favor viral gene expression, whereas integration in silent heterochromatin may not favor expression and may force transcriptional silence.

    “For example, proviral integration in the transcriptionally active regions could potentially favor expression of the viral genes, whereas integration in the transcriptionally silent regions (heterochromatin) may not be in favor of viral expression and may even force the virus to stay transcriptionally silent (Jordan et al. 2001, Lewinski et al. 2006, Einkauf et al. 2022, Teixeira et al. 2024).”

    From Beyond reverse transcription: molecular mechanisms and emerging paradigms in retroviral replication (2026) · cites this paper as Jordan et al. 2001

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Authors
Jordan, A., Defechereux, P., & Verdin, E.
Affiliations
University of California, San Francisco (US)
Corresponding author
Verdin, Eric
Venue
The EMBO Journal
Published
2001-04-02
Volume
20
Issue
7
Pages
1726-1738
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W1964660012
Cited by
467
References
48
Citations by year
2026: 13 · 2025: 21 · 2024: 19 · 2023: 18 · 2022: 15 · 2021: 15 · 2020: 21 · 2019: 21 · 2018: 20 · 2017: 26 · 2016: 25 · 2015: 27 · 2014: 14 · 2013: 15 · 2012: 14
FWCI
6.25
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Belgian American Educational Foundation
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM51671-05A2, R01GM051671)
Topics
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
Tat transactivation, basal transcription, chromatin environment, HIV-1 promoter, retroviral vectors, Jurkat cells, DNA methylation, histone acetylation, HIV gene expression
MeSH terms
Binding Sites, Cell Line, Transformed, Genetic Vectors, HeLa Cells, Humans, Hydroxamic Acids, Promoter Regions, Genetic, Tetradecanoylphorbol Acetate, Transcription, Genetic, HIV-1, Transcriptional Activation, Gene Products, tat, Genome, Human, Gene Expression Regulation, Viral, HIV Long Terminal Repeat, Virus Integration, Cyclin-Dependent Kinases, Jurkat Cells, DNA Methylation, Cyclin-Dependent Kinase 9, tat Gene Products, Human Immunodeficiency Virus, Histone Deacetylase Inhibitors

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