1XDD

X-ray structure of LFA-1 I-domain in complex with LFA703 at 2.2A resolution

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.164 

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Literature

Improved lymphocyte function-associated antigen-1 (LFA-1) inhibition by statin derivatives: molecular basis determined by x-ray analysis and monitoring of LFA-1 conformational changes in vitro and ex vivo

Weitz-Schmidt, G., Welzenbach, K., Dawson, J., Kallen, J.

(2004) J Biol Chem 279: 46764-46771

  • DOI: 10.1074/jbc.M407951200
  • Primary Citation of Related Structures:  
    1XDD, 1XDG

  • PubMed Abstract: 

    • The integrin lymphocyte function-associated antigen-1 (LFA-1) (alphaLbeta2; CD11a/CD18) plays an important role in leukocyte migration and T cell activation. LFA-1 is inhibited by the cholesterol-lowering drug lovastatin, which binds to an allosteric site of the alphaL I domain termed the lovastatin site (L-site) ...

    The integrin lymphocyte function-associated antigen-1 (LFA-1) (alphaLbeta2; CD11a/CD18) plays an important role in leukocyte migration and T cell activation. LFA-1 is inhibited by the cholesterol-lowering drug lovastatin, which binds to an allosteric site of the alphaL I domain termed the lovastatin site (L-site). Here we report for the first time the x-ray structures of the LFA-1 I domain complexed with derivatives of lovastatin optimized for LFA-1 inhibition. This analysis identified two new subpockets within the L-site occupied by chemical groups of the statin derivatives but not by lovastatin itself. Occupancy of these L-site subpockets led to distinct conformational changes in LFA-1, which were detectable by an epitope-monitoring assay. We utilized this assay to demonstrate improved LFA-1 inhibition in human blood in vitro and in blood samples from treated animals ex vivo. Moreover, we demonstrate that the novel lovastatin-derived LFA-1 inhibitor LFA878 exhibits potent anti-inflammatory effects in carrageenan-induced rat paw edema. In summary, the findings reported here extend the understanding of LFA-1 inhibition at the molecular level, allow for the identification and design of LFA-1 inhibitors of further enhanced potency, and support the expectation that LFA-1 inhibitors binding to the L-site will be of therapeutic value in treating inflammatory diseases.

    Organizational Affiliation: 

    Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Integrin alpha-LA, B188Homo sapiensMutation(s): 0 
Gene Names: ITGAL, CD11A
UniProt & NIH Common Fund Data Resources
Find proteins for P20701 (Homo sapiens)
Explore P20701 
Go to UniProtKB:  P20701
PHAROS:  P20701
GTEx:  ENSG00000005844
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AAY (Subject of Investigation/LOI)
Query on AAY
Download Ideal Coordinates CCD File 
 D [auth A], F [auth B]8-[2-((2S)-4-HYDROXY-1-{[5-(HYDROXYMETHYL)-6-METHOXY-2-NAPHTHYL]METHYL}-6-OXOPIPERIDIN-2-YL)ETHYL]-3,7-DIMETHYL-1,2,3,7,8,8A-HEXAHYDRONAPHTHALEN-1-YL 2-METHYLBUTANOATE
C37 H49 N O6
WPVRNXUYVXQXPY-YFAYRSKXSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 C [auth A], E [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
AAY PDBBind:  1XDD IC50: 200 (nM) from 1 assay(s)
Binding MOAD:  1XDD IC50: 200 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.164 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.7α = 90
b = 116.7β = 90
c = 82.8γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-21
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2013-02-20
    Changes: Database references
  • Version 1.4: 2014-11-12
    Changes: Structure summary