Abstract
The glucose oxidase (GOD) gene from Penicillium notatum was expressed in Pichia pastoris. The 1,815 bp gene, god-w, encodes 604 amino acids. Recombinant GOD-w had optimal activity at 35–40°C and pH 6.2 and was stable, from pH 3 to 7 maintaining >75% maximum activity after incubation at 50°C for 1 h. GOD-w worked as well as commercial GODs to improve bread making. To achieve high-level expression of recombinant GOD in P. pastoris, 272 nucleotides involving 228 residues were mutated, consistent with the codon bias of P. pastoris. The optimized recombinant GOD-m yielded 615 U ml−1 (2.5 g protein l−1) in a 3 l fermentor—410% higher than GOD-w (148 U ml−1), and thus is a low-cost alternative for the bread baking industry.
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This research was supported by the Fundamental Research Funds for the Central Research Institutes, CAAS-BRI (Grant no. 2011-08).
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Zhaowei Gao and Zhuofu Li have contributed equally.
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Gao, Z., Li, Z., Zhang, Y. et al. High-level expression of the Penicillium notatum glucose oxidase gene in Pichia pastoris using codon optimization. Biotechnol Lett 34, 507–514 (2012). https://doi.org/10.1007/s10529-011-0790-6
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DOI: https://doi.org/10.1007/s10529-011-0790-6