Abstract
Recombinant antibody fragments are significant therapeutic and diagnostic reagents. As such, their efficacy depends heavily on their affinities and biophysical properties. Thus, mutagenesis approaches have been extensively applied to recombinant antibodies to improve their affinity, stability, and solubility. Among the existing recombinant antibody variants, human VH domains stand out as the ones with the general need of solubility engineering at some point during their development; this solubility engineering step transforms VHs into nonaggregating, functional entities, rendering them useful as therapeutic and diagnostic reagents. Here, we present one of several approaches that have been employed to develop nonaggregating human VH domains. We apply an in vitro site-directed mutagenesis approach to an aggregating human VH domain by means of a splice overlap extension technique. The resultant mutant VHs are nonaggregating in contrast to the parent wild type VH and less prone to aggregation following thermal unfolding.
This is National Research Council of Canada Publication 50001.
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Acknowledgments
We are indebted to Tomoko Hirama, for helping us prepare the manuscript, and to Tom Devecseri, for preparing publication quality figures.
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Arbabi-Ghahroudi, M., MacKenzie, R., Tanha, J. (2010). Site-Directed Mutagenesis for Improving Biophysical Properties of VH Domains. In: Braman, J. (eds) In Vitro Mutagenesis Protocols. Methods in Molecular Biology, vol 634. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60761-652-8_22
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DOI: https://doi.org/10.1007/978-1-60761-652-8_22
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