MFE23 is a single chain Fv antibody that has a high affinity for carcinoembryonic antigen (CEA). A full homology model for CEA based on V-type, I-type and C2-type immunoglobulin folds, 28 oligosaccharides and the interdomain angle of CD2 was validate ...
MFE23 is a single chain Fv antibody that has a high affinity for carcinoembryonic antigen (CEA). A full homology model for CEA based on V-type, I-type and C2-type immunoglobulin folds, 28 oligosaccharides and the interdomain angle of CD2 was validated using solution scattering data. The superimposition of the intermolecular contacts observed in our recent crystal structure of MFE23 with the N-terminal domain of CEA permitted the MFE23-CEA complex to be modelled. Good surface and electrostatic complementarity and carbohydrate-unhindered access of MFE23 with the indentation between the first two CEA domains was observed. The model is supported by biochemical data and provides insight on the high affinity of MFE23 for CEA.
Related Citations:
Crystal Structure of the Anti-(Carcinoembryonic Antigen) Single-Chain Fv Antibody Mfe-23 and a Model for Antigen Binding Based on Intermolecular Contacts. Boehm, M.K., Corper, A.L., Wan, T., Sohi, M.K., Sutton, B.J., Thornton, J.D., Keep, P.A., Chester, K.A., Begent, R.H., Perkins, S.J. (2000) Biochem J 346: 519
Extended Glycoprotein Structure of the Seven Domains in Human Carcinoembryonic Antigen by X-Ray and Neutron Solution Scattering and an Automated Curve Fitting Procedure: Implications for Cellular Adhesion. Boehm, M.K., Mayans, M.O., Thornton, J.D., Begent, R.H., Keep, P.A., Perkins, S.J. (1996) J Mol Biol 259: 718
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, Royal Free and University College Medical School, University College London, London, UK.
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