Decay-accelerating factor (CD55), a regulator of the alternative and classical pathways of complement activation, is expressed on all serum-exposed cells. It is used by pathogens, including many enteroviruses and uropathogenic Escherichia coli, as a receptor prior to infection ...
Decay-accelerating factor (CD55), a regulator of the alternative and classical pathways of complement activation, is expressed on all serum-exposed cells. It is used by pathogens, including many enteroviruses and uropathogenic Escherichia coli, as a receptor prior to infection. We describe the x-ray structure of a pathogen-binding fragment of human CD55 at 1.7 A resolution containing two of the three domains required for regulation of human complement. We have used mutagenesis to map biological functions onto the molecule; decay-accelerating activity maps to a single face of the molecule, whereas bacterial and viral pathogens recognize a variety of different sites on CD55.
Related Citations:
Crystallization and Preliminary X-Ray Diffraction Analysis of a Biologically Active Fragment of Cd55 Lea, S.M., Powell, R., Evans, D.J. (1999) Acta Crystallogr D Biol Crystallogr D55: 1198
Determination of the Affinity and Kinetic Constants for the Interaction between the Human Virus Echovirus 11 and its Cellular Receptor, Cd55 Lea, S.M., Powell, R., Mckee, T., Evans, D.J., Brown, D.J., Stuart, D.I., Van Der Merwe, A. (1998) J Biol Chem 273: 30443
Organizational Affiliation:
Laboratory of Molecular Biophysics, Department of Biochemistry, University of Oxford, United Kingdom.
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