1HII

COMPARATIVE ANALYSIS OF THE X-RAY STRUCTURES OF HIV-1 AND HIV-2 PROTEASES IN COMPLEX WITH CGP 53820, A NOVEL PSEUDOSYMMETRIC INHIBITOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.138 

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This is version 1.4 of the entry. See complete history


Literature

Comparative analysis of the X-ray structures of HIV-1 and HIV-2 proteases in complex with CGP 53820, a novel pseudosymmetric inhibitor.

Priestle, J.P.Fassler, A.Rosel, J.Tintelnot-Blomley, M.Strop, P.Grutter, M.G.

(1995) Structure 3: 381-389

  • DOI: https://doi.org/10.1016/s0969-2126(01)00169-1
  • Primary Citation of Related Structures:  
    1HIH, 1HII

  • PubMed Abstract: 

    The human immunodeficiency virus (HIV) is the causative agent of acquired immunodeficiency syndrome (AIDS). Two subtypes of the virus, HIV-1 and HIV-2, have been characterized. The protease enzymes from these two subtypes, which are aspartic acid proteases and have been found to be essential for maturation of the infectious particle, share about 50% sequence identity. Differences in substrate and inhibitor binding between these enzymes have been previously reported. We report the X-ray crystal structures of both HIV-1 and HIV-2 proteases each in complex with the pseudosymmetric inhibitor, CGP 53820, to 2.2 A and 2.3 A, respectively. In both structures, the entire enzyme and inhibitor could be located. The structures confirmed earlier modeling studies. Differences between the CGP 53820 inhibitory binding constants for the two enzymes could be correlated with structural differences. Minor sequence changes in subsites at the active site can explain some of the observed differences in substrate and inhibitor binding between the two enzymes. The information gained from this investigation may help in the design of equipotent HIV-1/HIV-2 protease inhibitors.


  • Organizational Affiliation

    Department of Core Drug Discovery Technologies, Pharma Research, Ciba-Geigy Ltd., Basel, Switzerland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HIV-2 PROTEASE
A, B
99Human immunodeficiency virus 2Mutation(s): 0 
Gene Names: POL
EC: 3.4.23
UniProt
Find proteins for P04584 (Human immunodeficiency virus type 2 subtype A (isolate ROD))
Explore P04584 
Go to UniProtKB:  P04584
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04584
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
C20
Query on C20

Download Ideal Coordinates CCD File 
E [auth B]ACETYL-NH-VAL-CYCLOHEXYL-CH2[NCH2CHOH]CH2-BENZYL-VAL-NH-ACETYL
C31 H51 N5 O5
JNBVLGDICHLLTN-DZUOILHNSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Binding Affinity Annotations 
IDSourceBinding Affinity
C20 PDBBind:  1HII Ki: 53 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Observed: 0.138 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.4α = 90
b = 64.2β = 90
c = 99.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
TNTrefinement
X-PLORrefinement
MADNESdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-07-10
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-18
    Changes: Data collection, Other
  • Version 1.4: 2024-02-07
    Changes: Data collection, Database references, Derived calculations