Structural basis for LFA-1 inhibition upon lovastatin binding to the CD11a I-domain.
The lymphocyte function-associated antigen (LFA-1) belongs to the family of beta2-integrins and plays an important role in T-cell activation and leukocyte migration to sites of inflammation. We report here that lovastatin, a drug clinically used for lowering cholesterol levels, inhibits the interaction of human LFA-1 with its counter-receptor intercellular adhesion ... molecule-1. Using nuclear magnetic resonance spectroscopy and X-ray crystallography we show that the inhibitor binds to a highly conserved domain of the LFA-1 alpha-chain called the I-domain. The first three-dimensional structure of an integrin inhibitor bound to its receptor reveals atomic details for a hitherto unknown mode of LFA-1 inhibition. It also sheds light into possible mechanisms of LFA-1 mediated signalling and will support the design of novel anti-adhesive and immunosuppressive drugs.
Mesh Terms:
Amino Acid Sequence, Antigens, CD11, Binding Sites, Cell Adhesion, Crystallography, X-Ray, Humans, Intercellular Adhesion Molecule-1, Lovastatin, Lymphocyte Function-Associated Antigen-1, Magnetic Resonance Spectroscopy, Models, Molecular, Molecular Conformation, Molecular Sequence Data, Molecular Structure, Protein Binding, Protein Structure, Secondary, Tumor Cells, Cultured
Amino Acid Sequence, Antigens, CD11, Binding Sites, Cell Adhesion, Crystallography, X-Ray, Humans, Intercellular Adhesion Molecule-1, Lovastatin, Lymphocyte Function-Associated Antigen-1, Magnetic Resonance Spectroscopy, Models, Molecular, Molecular Conformation, Molecular Sequence Data, Molecular Structure, Protein Binding, Protein Structure, Secondary, Tumor Cells, Cultured
J. Mol. Biol.
Date: Sep. 10, 1999
PubMed ID: 10493852
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