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TitleCryo-EM structures and atomic model of the HIV-1 strand transfer complex intasome.
Journal, issue, pagesScience, Vol. 355, Issue 6320, Page 89-92, Year 2017
Publish dateJan 6, 2017
AuthorsDario Oliveira Passos / Min Li / Renbin Yang / Stephanie V Rebensburg / Rodolfo Ghirlando / Youngmin Jeon / Nikoloz Shkriabai / Mamuka Kvaratskhelia / Robert Craigie / Dmitry Lyumkis /
PubMed AbstractLike all retroviruses, HIV-1 irreversibly inserts a viral DNA (vDNA) copy of its RNA genome into host target DNA (tDNA). The intasome, a higher-order nucleoprotein complex composed of viral integrase ...Like all retroviruses, HIV-1 irreversibly inserts a viral DNA (vDNA) copy of its RNA genome into host target DNA (tDNA). The intasome, a higher-order nucleoprotein complex composed of viral integrase (IN) and the ends of linear vDNA, mediates integration. Productive integration into host chromatin results in the formation of the strand transfer complex (STC) containing catalytically joined vDNA and tDNA. HIV-1 intasomes have been refractory to high-resolution structural studies. We used a soluble IN fusion protein to facilitate structural studies, through which we present a high-resolution cryo-electron microscopy (cryo-EM) structure of the core tetrameric HIV-1 STC and a higher-order form that adopts carboxyl-terminal domain rearrangements. The distinct STC structures highlight how HIV-1 can use the common retroviral intasome core architecture to accommodate different IN domain modules for assembly.
External linksScience / PubMed:28059769 / PubMed Central
MethodsEM (single particle)
Resolution3.9 - 4.6 Å
Structure data

8481

5u1c

EMDB-8481, PDB-5u1c:
Structure of tetrameric HIV-1 Strand Transfer Complex Intasome
Method: EM (single particle) / Resolution: 3.9 Å

EMDB-8483:
Structure of higher-order HIV-1 strand transfer complex intasome
Method: EM (single particle) / Resolution: 4.6 Å

Chemicals

ChemComp-ZN:
Unknown entry

ChemComp-MG:
Unknown entry

Source
  • human immunodeficiency virus 1
  • homo sapiens (human)
  • sulfolobus solfataricus (archaea)
KeywordsVIRAL PROTEIN / integrase / integration / transposase / transesterification

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