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Characterization of pea chloroplastic carbonic anhydrase. Expression inEscherichia coli and site-directed mutagenesis

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Abstract

A cDNA encoding the mature, chloroplast-localized carbonic anhydrase in pea has been expressed inE. coli. The enzyme is fully active and yields of up to 20% of the total soluble protein can be obtained from the bacteria. This expression system was used to monitor the effects of site-directed mutagenesis of seven residues found within conserved regions in the pea carbonic anhydrase amino acid sequence. The effects of these modifications are discussed with respect to the potential of various amino acids to act as sites for zinc coordination or intramolecular proton shuttles.

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Authors and Affiliations

  1. Dept. of Botany, University of Toronto, 25 Willcocks St., M5S 3B2, Toronto, Ontario, Canada

    Nicholas J. Provart, Nathalie Majeau & John R. Coleman

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  1. Nicholas J. Provart
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  2. Nathalie Majeau
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  3. John R. Coleman
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Provart, N.J., Majeau, N. & Coleman, J.R. Characterization of pea chloroplastic carbonic anhydrase. Expression inEscherichia coli and site-directed mutagenesis. Plant Mol Biol 22, 937–943 (1993). https://doi.org/10.1007/BF00028967

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  • DOI: https://doi.org/10.1007/BF00028967

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