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Kinetic characterization of the interaction of the Z-fragment of protein A with mouse-IgG3 in a volume in chemical space.
KTH, Superseded Departments, Biochemistry and Biotechnology.
KTH, Superseded Departments, Biochemistry and Biotechnology.
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1999 (English)In: Proteins: Structure, Function, and Genetics, ISSN 0887-3585, E-ISSN 1097-0134, Vol. 37, no 3Article in journal (Refereed) Published
Abstract [en]

The kinetic rate parameters for the interaction between a single domain analogue of staphylococcal protein A (Z) and a mouse-IgG3 monoclonal antibody (MAb) were measured in Hepes buffer with different chemical additives. Five buffer ingredients (pH, NaCl, DMSO, EDTA, and KSCN) were varied simultaneously in 16 experiments following a statistical experimental plan. The 16 buffers thus spanned a volume in chemical space. A mathematical model, using data from the buffer composition, was developed and used to predict apparent kinetic parameters in five new buffers within the spanned volume. Association and dissociation parameters were measured in the new buffers, and these agreed with the predicted values, indicating that the model was valid within the spanned volume. The pattern of variation of the kinetic parameters in relation to buffer composition was different for association and dissociation, such that pH influenced both association and dissociation and NaCl influenced only dissociation. This indicated that the recognition mechanism (association) and the stability of the formed complex (dissociation) involve different binding forces, which can be further investigated by kinetic studies in systematically varied buffers.

Place, publisher, year, edition, pages
1999. Vol. 37, no 3
National Category
Biological Sciences Industrial Biotechnology
URN: urn:nbn:se:kth:diva-184215PubMedID: 10591108OAI: diva2:915608

NR 20160405

Available from: 2016-03-30 Created: 2016-03-30 Last updated: 2016-04-05Bibliographically approved

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