5EU7

Crystal structure of HIV-1 integrase catalytic core in complex with Fab


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Preserved HTH-Docking Cleft of HIV-1 Integrase Is Functionally Critical.

Galilee, M.Britan-Rosich, E.Griner, S.L.Uysal, S.Baumgartel, V.Lamb, D.C.Kossiakoff, A.A.Kotler, M.Stroud, R.M.Marx, A.Alian, A.

(2016) Structure 24: 1936-1946

  • DOI: 10.1016/j.str.2016.08.015

  • PubMed Abstract: 
  • HIV-1 integrase (IN) catalyzes viral DNA integration into the host genome and facilitates multifunctional steps including virus particle maturation. Competency of IN to form multimeric assemblies is functionally critical, presenting an approach for a ...

    HIV-1 integrase (IN) catalyzes viral DNA integration into the host genome and facilitates multifunctional steps including virus particle maturation. Competency of IN to form multimeric assemblies is functionally critical, presenting an approach for anti-HIV strategies. Multimerization of IN depends on interactions between the distinct subunit domains and among the flanking protomers. Here, we elucidate an overlooked docking cleft of IN core domain that anchors the N-terminal helix-turn-helix (HTH) motif in a highly preserved and functionally critical configuration. Crystallographic structure of IN core domain in complex with Fab specifically targeting this cleft reveals a steric overlap that would inhibit HTH-docking, C-terminal domain contacts, DNA binding, and subsequent multimerization. While Fab inhibits in vitro IN integration activity, in vivo it abolishes virus particle production by specifically associating with preprocessed IN within Gag-Pol and interfering with early cytosolic Gag/Gag-Pol assemblies. The HTH-docking cleft may offer a fresh hotspot for future anti-HIV intervention strategies.


    Organizational Affiliation

    Department of Biology, Technion - Israel Institute of Technology, Haifa 320003, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Integrase
A, B
153Human immunodeficiency virus type 1 group M subtype BGene Names: gag-pol
EC: 3.4.23.16, 3.1.-.-, 2.7.7.49, 2.7.7.7, 3.1.26.13, 2.7.7.-, 3.1.13.2
Find proteins for P04585 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P04585
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FAB Heavy Chain
E, F
233N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
FAB light chain
D, C
214N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.64 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 82.489α = 90.00
b = 87.650β = 95.83
c = 96.339γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-28
    Type: Initial release
  • Version 1.1: 2016-10-19
    Type: Database references
  • Version 1.2: 2016-11-09
    Type: Database references