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1vca
From Proteopedia
| 1vca, resolution 1.80Å () | |||||||||
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| Domains: | C2-set, IGcam | ||||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
CRYSTAL STRUCTURE OF AN INTEGRIN-BINDING FRAGMENT OF VASCULAR CELL ADHESION MOLECULE-1 AT 1.8 ANGSTROMS RESOLUTION
The cell-surface glycoprotein vascular cell adhesion molecule-1 (VCAM-1; ref. 1) mediates intercellular adhesion by specific binding to the integrin very-late antigen-4 (VLA-4, alpha 4 beta 1; ref. 3). VCAM-1, with the intercellular adhesion molecules ICAM-1, ICAM-2, ICAM-3 and the mucosal vascular addressin MAd-CAM-1, forms an integrin-binding subgroup of the immunoglobulin superfamily. In addition to their clinical relevance in inflammation, these molecules act as cellular receptors for viral and parasitic agents. The predominant form of VCAM-1 in vivo has an amino-terminal extracellular region comprising seven immunoglobulin-like domains. Functional studies have identified a conserved integrin-binding motif in domains 1 and 4, variants of which are present in the N-terminal domain of all members of the immunoglobulin superfamily subgroup. We report here the crystal structure of a VLA-4-binding fragment composed of the first two domains of VCAM-1. The integrin-binding motif (Q38IDSPL) is highly exposed and forms the N-terminal region of the loop between beta-strands C and D of domain 1. This motif exhibits a distinctive conformation which we predict will be common to all the integrin-binding IgSF molecules. These, and additional data, map VLA-4 binding to the face of the CFG beta-sheet, the surface previously identified as the site for intercellular adhesive interactions between members of the immunoglobulin superfamily.
Crystal structure of an integrin-binding fragment of vascular cell adhesion molecule-1 at 1.8 A resolution., Jones EY, Harlos K, Bottomley MJ, Robinson RC, Driscoll PC, Edwards RM, Clements JM, Dudgeon TJ, Stuart DI, Nature. 1995 Feb 9;373(6514):539-44. PMID:7531291
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1VCA is a 2 chains structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
- Jones EY, Harlos K, Bottomley MJ, Robinson RC, Driscoll PC, Edwards RM, Clements JM, Dudgeon TJ, Stuart DI. Crystal structure of an integrin-binding fragment of vascular cell adhesion molecule-1 at 1.8 A resolution. Nature. 1995 Feb 9;373(6514):539-44. PMID:7531291 doi:10.1038/373539a0
Page seeded by OCA on Tue Feb 17 08:25:20 2009
