Abstract
This brief chapter is less of a protocol and more of a reminder that valuable information on the location of epitopes can be obtained by studying antibody binding to naturally occurring variants of the antigen. These variants are usually antigens from different species or different isoforms of the antigen. Of course, amino acid sequences from different species must be available, but this now applies to a large and growing number of proteins on the data bases. Since these natural variants retain their function (e.g., enzyme activity), the amino acid changes are unlikely to have affected antibody binding by causing global changes in protein conformation. However, in the case of assembled epitopes, caution is still required before concluding that the altered amino acid is a “contact” residue within the epitope, especially if no supporting evidence is available. With linear epitopes, the conclusion can often be confirmed by using synthetic peptides. For globular proteins, mutations that have no effect on protein function alter surface amino acids more frequently than amino acids in the protein “core,” and it is these surface amino acids that are also involved in antibody binding. Consequently, the chances of an MAb displaying species specificity are rather high, even when the antigen is fairly highly conserved overall.
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References
Ping, L. H. and Lemon, S. M. (1992) Antigenic structure of human hepatitis-A virus defined by analysis of escape mutants selected against murine monoclonal antibodies. J. Virol. 66, 2208–2216.
Yoshiyama, H., Mo, H. M., Moore, J. P., and Ho, D. D. (1994) Characterization of mutants of human immunodeficiency virus type 1 that have escaped neutralization by a monoclonal antibody to the GP120 V2 loop. J. Virol. 68, 974–978.
Saito, T., Taylor, G., Laver, W. G., Kawaoka, Y., and Webster, R. G. (1994) Antigenicity of the N8 influenza-A virus neuraminidase. Existence of an epitope at the subunit interface of the neuraminidase. J. Virol. 68, 1790–1796.
Zhou, Y. J., Burns, J. W., Morita, Y., Tanaka, T., and Estes, M. K. (1994) Localization of Rotavirus VP4 neutralization epitopes involved in antibody-induced conformational changes of virus structure. J. Virol. 68, 3955–3964.
Ciarlet, M., Hidalgo, M., Gorziglia, M., and Liprandi, F. (1994) Characterization of neutralization epitopes on the VP7 surface protein of serotype G11 porcine rotaviruses. J. Gen. Virol. 75, 1867–1873.
Shotton, C., Arnold, C., Sattenau, Q., Sodroski, J., and McKeating, J. A. (1995) Identification and characterization of monoclonal antibodies specific for polymorphic antigenic determinants within the V2 region of the human immunodeficiency virus type 1 envelope glycoprotein. J. Virol. 69, 222–230.
Nguyen thi Man, Cartwright, A. J., Osborne, M., and Morris, G. E. (1991) Structural changes in the C-terminal region of human brain creatine kinase studied with monoclonal antibodies. Biochim. Biophys. Acta 1076, 245–251.
Morris, G.E. (1989) Monoclonal antibody studies of creatine kinase. The ART epitope: evidence for an intermediate in protein folding. Biochem. J. 257, 461–469.
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© 1996 Humana Press Inc.
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Morris, G.E. (1996). Use of Natural or Selected Mutants and Variants for Epitope Mapping. In: Morris, G.E. (eds) Epitope Mapping Protocols. Methods in Molecular Biology™, vol 66. Humana Press. https://doi.org/10.1385/0-89603-375-9:373
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DOI: https://doi.org/10.1385/0-89603-375-9:373
Publisher Name: Humana Press
Print ISBN: 978-0-89603-375-7
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