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Title: Crystal structure of the Rous sarcoma virus intasome

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature16950· OSTI ID:1239418
 [1];  [1];  [2];  [3];  [3];  [3];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Biochemistry, Molecular Biology and Biophysics. Inst. for Molecular Virology. Masonic Cancer Center
  2. Cornell Univ., Lemont, IL (United States). Advanced Photon Source. Northeastern Collaborative Access Team
  3. Saint Louis Univ., St. Louis, MO (United States). Health Sciences Center. Inst. for Molecular Virology

Integration of the reverse-transcribed viral DNA into the host genome is an essential step in the life cycle of retroviruses. Retrovirus integrase catalyses insertions of both ends of the linear viral DNA into a host chromosome. Integrase from HIV-1 and closely related retroviruses share the three-domain organization, consisting of a catalytic core domain flanked by amino- and carboxy-terminal domains essential for the concerted integration reaction. Although structures of the tetrameric integrase–DNA complexes have been reported for integrase from prototype foamy virus featuring an additional DNA-binding domain and longer interdomain linkers, the architecture of a canonical three-domain integrase bound to DNA remained elusive. In this paper, we report a crystal structure of the three-domain integrase from Rous sarcoma virus in complex with viral and target DNAs. The structure shows an octameric assembly of integrase, in which a pair of integrase dimers engage viral DNA ends for catalysis while another pair of non-catalytic integrase dimers bridge between the two viral DNA molecules and help capture target DNA. The individual domains of the eight integrase molecules play varying roles to hold the complex together, making an extensive network of protein–DNA and protein–protein contacts that show both conserved and distinct features compared with those observed for prototype foamy virus integrase. Finally, our work highlights the diversity of retrovirus intasome assembly and provides insights into the mechanisms of integration by HIV-1 and related retroviruses.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Inst. of Health (NIH) (United States)
Contributing Organization:
Cornell Univ., Lemont, IL (United States). Advanced Photon Source; Saint Louis Univ., St. Louis, MO (United States)
Grant/Contract Number:
AC02-06CH11357; P41 GM103403; GM109770; AI087098; AI100682
OSTI ID:
1239418
Journal Information:
Nature (London), Vol. 530, Issue 7590; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 64 works
Citation information provided by
Web of Science

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Cited By (29)

Retroviruses integrate into a shared, non-palindromic DNA motif journal November 2016
Integration site selection by retroviruses and transposable elements in eukaryotes journal March 2017
Retroviral integration into nucleosomes through DNA looping and sliding along the histone octamer journal September 2019
The free energy landscape of retroviral integration journal October 2019
Structures of a RAG-like transposase during cut-and-paste transposition journal November 2019
Structure of a P element transposase–DNA complex reveals unusual DNA structures and GTP-DNA contacts journal October 2019
How mouse RAG recombinase avoids DNA transposition journal February 2020
Multifaceted HIV integrase functionalities and therapeutic strategies for their inhibition journal August 2019
The conformational feasibility for the formation of reaching dimer in ASV and HIV integrase: a molecular dynamics study journal November 2016
Multimerization of HIV-1 integrase hinges on conserved SH3-docking platforms posted_content April 2018
Cryo-EM structures and atomic model of the HIV-1 strand transfer complex intasome journal January 2017
Structural basis for strand-transfer inhibitor binding to HIV intasomes journal January 2020
Modulation of chromatin structure by the FACT histone chaperone complex regulates HIV-1 integration journal July 2017
Recent advances in retroviruses via cryo-electron microscopy journal February 2018
Retrotransposon targeting to RNA polymerase III-transcribed genes journal April 2018
Structural Implications of Genotypic Variations in HIV-1 Integrase From Diverse Subtypes journal August 2018
Structural Insights on Retroviral DNA Integration: Learning from Foamy Viruses journal August 2019
Retroviruses integrate into a shared, non-palindromic DNA motif. text January 2016
Retroviral integration into nucleosomes through DNA looping and sliding along the histone octamer. text January 2020
The conformational feasibility for the formation of reaching dimer in ASV and HIV integrase: a molecular dynamics study text January 2016
Retroviral integration into nucleosomes through DNA looping and sliding along the histone octamer. text January 2020
The conformational feasibility for the formation of reaching dimer in ASV and HIV integrase: a molecular dynamics study text January 2016
Prototype foamy virus integrase is promiscuous for target choice journal September 2018
Retroviral DNA Integration journal May 2016
Differential assembly of Rous sarcoma virus tetrameric and octameric intasomes is regulated by the C-terminal domain and tail region of integrase journal October 2018
DNA minicircles clarify the specific role of DNA structure on retroviral integration journal July 2016
A supramolecular assembly mediates lentiviral DNA integration journal January 2017
Dissecting Virus Infectious Cycles by Cryo-Electron Microscopy journal June 2016
Target DNA bending by the Mu transpososome promotes careful transposition and prevents its reversal journal February 2017

Figures / Tables (15)