Cited by 314HIV Research and TreatmentGenomics and Chromatin DynamicsHIV/AIDS drug development and treatment

Crystal structure of HIV-1 Tat complexed with human P-TEFb

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Tahirov, Tahir H., Babayeva, Nigar D., Varzavand, Katayoun, Cooper, Jeffrey J., Sedore, Stanley C., Price, David H.·2010·Nature

Abstract

Regulation of the expression of the human immunodeficiency virus (HIV) genome is accomplished in large part by controlling transcription elongation. The viral protein Tat hijacks the host cell's RNA polymerase II elongation control machinery through interaction with the positive transcription elongation factor, P-TEFb, and directs the factor to promote productive elongation of HIV mRNA. Here we describe the crystal structure of the Tat.P-TEFb complex containing HIV-1 Tat, human Cdk9 (also known as CDK9), and human cyclin T1 (also known as CCNT1). Tat adopts a structure complementary to the surface of P-TEFb and makes extensive contacts, mainly with the cyclin T1 subunit of P-TEFb, but also with the T-loop of the Cdk9 subunit. The structure provides a plausible explanation for the tolerance of Tat to sequence variations at certain sites. Importantly, Tat induces significant conformational changes in P-TEFb. This finding lays a foundation for the design of compounds that would specifically inhibit the Tat.P-TEFb complex and block HIV replication.

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  • Following Tat-TAR interaction, the host super elongation complex, including p-TEFb and PAF-1, is recruited to boost transcription and significantly increase production of viral RNA transcripts.

    “Following the Tat–TAR interaction, the host super elongation complex, which includes the cellular positive transcription elongation factor p-TEFb and polymerase-associated factor 1 (PAF-1), is recruited to further boost transcription, significantly increasing the production of viral RNA transcripts (Fig. 8A) (Peterlin and Price 2006, Tahirov et al. 2010, Gu et al. 2014).”

    From Beyond reverse transcription: molecular mechanisms and emerging paradigms in retroviral replication (2026) · cites this paper as Tahirov et al. 2010

    The Abstract (page not provided) says the Tat–P-TEFb complex is recruited to TAR during HIV infection and that P-TEFb promotes productive elongation of HIV mRNA. It does not identify a recruited super elongation complex containing PAF-1 or quantify an increase in viral RNA transcripts. (LLM, conf=0.88)

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Research works printed but not linked: 1

  1. [34]Crooks GE Hon G Chandonia JM Brenner SE WebLogo: a sequence logo generator Genome Res 2004 14 1188 90 15173120 PMC419797

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Authors
Tahirov, T. H., Babayeva, N. D., Varzavand, K., Cooper, J. J., Sedore, S. C., & Price, D. H.
Affiliations
  • University of Nebraska Medical Center (US)
  • University of Iowa (US)
Corresponding author
Tahirov, Tahir H.
Venue
Nature
Published
2010-06
Volume
465
Issue
7299
Pages
747-751
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2127284613
Cited by
314
References
47
Citations by year
2026: 6 · 2025: 10 · 2024: 13 · 2023: 7 · 2022: 13 · 2021: 10 · 2020: 16 · 2019: 15 · 2018: 25 · 2017: 27 · 2016: 27 · 2015: 24 · 2014: 23 · 2013: 30 · 2012: 28
FWCI
11.16
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (P30CA036727)
  • National Institute of General Medical Sciences (R01GM035500, R01GM082923, GM-35500, GM082923)
  • National Institute of Allergy and Infectious Diseases (AI074392, R21AI074392, R33AI074392)
  • National Center for Research Resources (RR 15301, P41RR015301)
  • Basic Energy Sciences
Topics
  • Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Infectious Diseases › HIV/AIDS drug development and treatment
Keywords
HIV-1 Tat protein, P-TEFb, CDK9, cyclin T1, transcription elongation, protein-protein interaction, conformational change, HIV replication, antiviral drug targets
MeSH terms
Adenosine Triphosphate, Amino Acid Sequence, Animals, Binding Sites, Enzyme Activation, Humans, Models, Molecular, Molecular Sequence Data, Protein Binding, Protein Conformation, HIV-1, Crystallography, X-Ray, Cyclin-Dependent Kinase 9, Positive Transcriptional Elongation Factor B, tat Gene Products, Human Immunodeficiency Virus, Cyclin T

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