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Gene. 1995 Dec 29;167(1-2):215-9.

High-level production of spinach glycolate oxidase in the methylotrophic yeast Pichia pastoris: engineering a biocatalyst.

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  • 1DuPont Central Research and Development, Glasgow Site, Newark, DE 19714-6101, USA.


Glycolate oxidase (GO) is a flavo-enzyme that catalyzes the oxidation of glycolate, and is useful for the biocatalytic production of glyoxylate. We have produced high levels of spinach GO in the methylotrophic yeast Pichia pastoris (Pp), by chromosomal integration of multiple copies of an expression cassette containing the GO coding sequence under control of the methanol-inducible alcohol oxidase I promoter. Under fermentation conditions, greater than 250 units of GO per gram of cells (wet weight) was obtained, corresponding to roughly 20-30% of soluble cell protein. This recombinant Pp strain was used as a whole-cell biocatalyst for conversion of glycolic acid to glyoxylic acid.

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