1CL7

ANTI HIV1 PROTEASE FAB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Inhibition of the HIV-1 and HIV-2 proteases by a monoclonal antibody.

Lescar, J.Brynda, J.Rezacova, P.Stouracova, R.Riottot, M.M.Chitarra, V.Fabry, M.Horejsi, M.Sedlacek, J.Bentley, G.A.

(1999) Protein Sci 8: 2686-2696

  • DOI: 10.1110/ps.8.12.2686
  • Primary Citation of Related Structures:  
    1CL7

  • PubMed Abstract: 
  • The monoclonal antibody 1696, directed against the HIV-1 protease, displays strong inhibitory effects toward the catalytic activity of the enzyme of both the HIV-1 and HIV-2 isolates. This antibody cross-reacts with peptides that include the N-termin ...

    The monoclonal antibody 1696, directed against the HIV-1 protease, displays strong inhibitory effects toward the catalytic activity of the enzyme of both the HIV-1 and HIV-2 isolates. This antibody cross-reacts with peptides that include the N-terminus of the enzyme, a region that is well conserved in sequence among different viral strains and which, furthermore, is crucial for homodimerization to the active enzymatic form. This observation, as well as antigen-binding studies in the presence of an active site inhibitor, suggest that 1696 inhibits the HIV protease by destabilizing its active homodimeric form. To characterize further how the antibody 1696 inhibits the HIV-1 and HIV-2 proteases, we have solved the crystal structure of its Fab fragment by molecular replacement and refined it at 3.0 A resolution. The antigen binding site has a deep cavity at its center, which is lined mainly by acidic and hydrophobic residues, and is large enough to accommodate several antigen residues. The structure of the Fab 1696 could form a starting basis for the design of alternative HIV protease-inhibiting molecules of broad specificity.


    Organizational Affiliation

    Unité d'Immunologie Structurale (URA 1961 CNRS), Département d'Immunologie, Institut Pasteur, Paris, France.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (IGG1 ANTIBODY 1696 (light chain))L216Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (IGG1 ANTIBODY 1696 (variable heavy chain))H135Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (IGG1 ANTIBODY 1696 (constant heavy chain))I82Mus musculusMutation(s): 0 
Gene Names: Ighg1Igh-4
Find proteins for P01869 (Mus musculus)
Explore P01869 
Go to UniProtKB:  P01869
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.4α = 90
b = 58.8β = 90
c = 143γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-01-12
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance