Download MendeleyAn atomic resolution view of ICAM recognition in a complex between the binding domains of ICAM-3 and integrin alphaLbeta2.
Song, G., Yang, Y., Liu, J.H., Casasnovas, J.M., Shimaoka, M., Springer, T.A., Wang, J.H.(2005) Proc Natl Acad Sci U S A 102: 3366-3371
- PubMed: 15728350
- DOI: https://doi.org/10.1073/pnas.0500200102
- Primary Citation of Related Structures:
1T0P - PubMed Abstract:
Within the Ig superfamily (IgSF), intercellular adhesion molecules (ICAMs) form a subfamily that binds the leukocyte integrin alphaLbeta2. We report a 1.65-A-resolution crystal structure of the ICAM-3 N-terminal domain (D1) in complex with the inserted domain, the ligand-binding domain of alphaLbeta2. This high-resolution structure and comparisons among ICAM subfamily members establish that the binding of ICAM-3 D1 onto the inserted domain represents a common docking mode for ICAM subfamily members. The markedly different off-rates of ICAM-1, -2, and -3 appear to be determined by the hydrophobicity of residues that surround a metal coordination bond in the alphaLbeta2-binding interfaces. Variation in composition of glycans on the periphery of the interfaces influences on-rate.
Organizational Affiliation:
CBR Institute for Biomedical Research, Department of Pathology, Harvard Medical School, Boston, MA 02115, USA.
