Download MendeleyThe crystal structure of IgE Fc reveals an asymmetrically bent conformation
Wan, T., Beavil, R.L., Fabiane, S.M., Beavil, A.J., Sohi, M.K., Keown, M., Young, R.J., Henry, A.J., Owens, R.J., Gould, H.J., Sutton, B.J.(2002) Nat Immunol 3: 681-686
- PubMed: 12068291 Search on PubMed
- DOI: https://doi.org/10.1038/ni811
- Primary Citation Related Structures:
1O0V - PubMed Abstract:
The distinguishing structural feature of immunoglobulin E (IgE), the antibody responsible for allergic hypersensitivity, is the C epsilon 2 domain pair that replaces the hinge region of IgG. The crystal structure of the IgE Fc (constant fragment) at a 2.6-A resolution has revealed these domains. They display a distinctive, disulfide-linked Ig domain interface and are folded back asymmetrically onto the C epsilon 3 and C epsilon 4 domains, which causes an acute bend in the IgE molecule. The structure implies that a substantial conformational change involving C epsilon 2 must accompany binding to the mast cell receptor Fc epsilon RI. This may be the basis of the exceptionally slow dissociation rate of the IgE-Fc epsilon RI complex and, thus, of the ability of IgE to cause persistent allergic sensitization of mast cells.
- The Randall Centre, King's College London, New Hunt's House, London SE1 1UL, UK.
Organizational Affiliation:
