1HYV

HIV INTEGRASE CORE DOMAIN COMPLEXED WITH TETRAPHENYL ARSONIUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.221 

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This is version 1.4 of the entry. See complete history


Literature

Identification of a small-molecule binding site at the dimer interface of the HIV integrase catalytic domain.

Molteni, V.Greenwald, J.Rhodes, D.Hwang, Y.Kwiatkowski, W.Bushman, F.D.Siegel, J.S.Choe, S.

(2001) Acta Crystallogr D Biol Crystallogr 57: 536-544

  • DOI: 10.1107/s0907444901001652
  • Primary Citation of Related Structures:  
    1HYV, 1HYZ

  • PubMed Abstract: 
  • Integration of the reverse-transcribed HIV cDNA into the host DNA is a required step in viral replication. The virus-encoded integrase protein catalyzes the initial DNA breaking and joining reactions that mediate cDNA integration. Here, the identification by X-ray crystallography of a small-molecule binding site on the integrase catalytic domain is reported ...

    Integration of the reverse-transcribed HIV cDNA into the host DNA is a required step in viral replication. The virus-encoded integrase protein catalyzes the initial DNA breaking and joining reactions that mediate cDNA integration. Here, the identification by X-ray crystallography of a small-molecule binding site on the integrase catalytic domain is reported. The small-molecule family studied consists of a core of arsenic or phosphorus surrounded by four aromatic groups. Two arsenic derivatives were visualized bound to integrase. In each case, two molecules bound at symmetry-related sites on the catalytic domain dimer interface. The first compound studied, tetraphenyl arsonium, did not inhibit integrase. However, a synthetic compound substituting a catechol for one of the phenyl rings, dihydroxyphenyltriphenylarsonium, bound to the same site and did inhibit the enzyme. Changes in the vicinity of the catalytic site were seen with the inhibitory compound only, potentially explaining its mechanism of action. Further substituting phosphonium for arsonium yielded a compound with an IC(50) in the low micromolar range. These findings may be useful in designing new inhibitors of integrase, which is at present the only one of the three HIV enzymes for which clinically useful inhibitors are not available.


    Organizational Affiliation

    Department of Chemistry, University of California, San Diego, La Jolla, CA 92093-0358, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INTEGRASEA166Human immunodeficiency virus 1Mutation(s): 3 
EC: 2.7.7.49 (PDB Primary Data), 3.4.23.16 (UniProt), 2.7.7.7 (UniProt), 3.1.26.13 (UniProt), 3.1.13.2 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
UniProt
Find proteins for P12497 (Human immunodeficiency virus type 1 group M subtype B (isolate NY5))
Explore P12497 
Go to UniProtKB:  P12497
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TTA (Subject of Investigation/LOI)
Query on TTA

Download Ideal Coordinates CCD File 
D [auth A]TETRAPHENYL-ARSONIUM
C24 H20 As
PJMJFVQKDBRMIP-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CAF
Query on CAF
AL-PEPTIDE LINKINGC5 H12 As N O3 SCYS
Binding Affinity Annotations 
IDSourceBinding Affinity
TTA Binding MOAD:  1HYV IC50: 5.00e+6 (nM) from 1 assay(s)
PDBBind:  1HYV IC50: 5.00e+6 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.221 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.01α = 90
b = 72.01β = 90
c = 65.6γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-04-04
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations