Abstract
A novel class II 5-enoylpyruvylshikimate-3-phosphate synthase (EPSPS) was identified from Pseudomonas stutzeri A1501 by complementation of an Escherichia coli auxotrophic aroA mutant. The single amino acid substitution of serine (Ser) for asparagine (Asn)-130 of the A1501 EPSPS enhanced resistance to 200 mM glyphosate. The mutated EPSPS had a 2.5-fold increase for IC50 [glyphosate] value, a 2-fold increase for K i [glyphosate] value, but a K m [PEP] value similar to that of wild type. The effect of the single residue mutation on glyphosate resistance was also analyzed using a computer-based three-dimensional model.
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Acknowledgment
This work was supported by a grant from the Ministry of Science and Technology China (National Basic Research Program of China, 2007CB707805).
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Liang, A., Sha, J., Lu, W. et al. A single residue mutation of 5-enoylpyruvylshikimate-3-phosphate synthase in Pseudomonas stutzeri enhances resistance to the herbicide glyphosate. Biotechnol Lett 30, 1397–1401 (2008). https://doi.org/10.1007/s10529-008-9703-8
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DOI: https://doi.org/10.1007/s10529-008-9703-8