Abstract
A variety of methods have been developed for random mutagenesis of genes and whole plasmids to generate genetic diversity for directed evolution experiments (1). In particular, bacterial strains exhibiting unusually high rates of spontaneous DNA mutagenesis, or mutator strains, can be used to generate large, diverse plasmid libraries. Propagation of plasmids within relatively stable mutator strains has been shown to provide a rich spectrum of single base substitutions, insertions, and deletions throughout the entire plasmid (2). A significant advantage of using mutator strains to create random libraries is the accessibility of the procedure. Specialized equipment or cloning techniques are not required. Researchers can potentially create a large random library in two or three days, with minimal effort or prior experience in recombinant DNA techniques.
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References
Brakmann, S. (2001) Discovery of superior enzymes by directed molecular evolution. Chembiochem 2, 865–871.
Cox, E. C. (1976) Bacterial mutator genes and the control of spontaneous mutation. Annu. Rev. Genet. 10, 135–156.
Miller, J. H. (1998) Mutators in Escherichia coli. Mutat. Res. 409, 99–106.
Schaaper, R. M. (1988) Mechanisms of mutagenesis in the Escherichia coli mutator mutD5: role of DNA mismatch repair. Proc. Natl. Acad. Sci. USA 85, 8126–8130.
Hsieh, P. (2001) Molecular mechanisms of DNA mismatch repair. Mutat. Res. 486, 71–87.
Fowler, R. G. and Schaaper R. M. (1997) The role of the mutT gene of Escherichia coli in maintaining replication fidelity. FEMS Microbiol. Rev. 21, 43–54.
Palmer, B. R. and Marinus M. G. (1991) DNA methylation alters the pattern of spontaneous mutation in Escherichia coli cells (mutD) defective in DNA polymerase III proofreading. Mutat. Res. 264, 15–23.
Stefan, A., et al. (2001) Directed evolution of beta-galactosidase from Escherichia coli by mutator strains defective in the 3′→5′ exonuclease activity of DNA polymerase III. FEBS Lett. 493, 139–143.
Coia, G., et al. (1997) Use of mutator cells as a means for increasing production levels of a recombinant antibody directed against Hepatitis B. Gene 201, 203–209.
Greener, A., Callahan, M., and Jerpseth, B. (1997) An efficient random mutagenesis technique using an E. coli mutator strain. Mol. Biotechnol. 7, 189–195.
Daugherty, P.S., et al. (2000) Quantitative analysis of the effect of the mutation frequency on the affinity maturation of single chain Fv antibodies. Proc. Natl. Acad. Sci. USA 97, 2029–2034.
Seidman, C.E., Struhl, K., Sheen, J., and Jessen, T. (1997) Introduction of Plasmid DNA into Cells, in Current Protocols in Molecular Biology (Ausubel, F.M., Brent, R., Kingston, R. E., et al., eds.), John Wiley & Sons Inc. Hoboken, NJ, pp. 1.8.1–1.8.2.
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Nguyen, A.W., Daugherty, P.S. (2003). Production of Randomly Mutated Plasmid Libraries Using Mutator Strains. In: Arnold, F.H., Georgiou, G. (eds) Directed Evolution Library Creation. Methods in Molecular Biology™, vol 231. Humana Press. https://doi.org/10.1385/1-59259-395-X:39
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DOI: https://doi.org/10.1385/1-59259-395-X:39
Publisher Name: Humana Press
Print ISBN: 978-1-58829-285-8
Online ISBN: 978-1-59259-395-8
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