Engineered Yeast Displaying Specific Norovirus-Binding Nanobodies for the Concentration and Detection of Human Norovirus in Food Matrix.

Xue Zhao, Mahbubur Rahman, Zhiyuan Xu, Tom Kasputis, Yawen He, Lijuan Yuan, R Clay Wright, Juhong Chen

Journal of agricultural and food chemistry 2023 Jun 07

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Human noroviruses pose grave threats to public health and economy. In this study, we genetically engineered yeast (Saccharomyces cerevisiae EBY100) to display specific norovirus-binding nanobodies (Nano-26 and Nano-85) on cell surface to facilitate the concentration of noroviruses for improved detection. Binding of norovirus virus-like particles (VLPs) to these nanobody-displaying yeasts was confirmed and characterized using confocal microscopy and flow cytometry. The ability of our engineered yeasts to capture norovirus VLPs can reach up to 91.3%. Furthermore, this approach was applied to concentrate and detect norovirus VLPs in a real food matrix. A wide linear detection range (1-104 pg/g) was observed, and the detection limit on spiked spinach was calculated as low as 0.071 pg/g. Overall, our engineered yeasts could be a promising approach to concentrate and purify noroviruses in food samples for easy detection, which allows us to prevent the spread of food-borne virus in the food supply chain.

Citation

Xue Zhao, Mahbubur Rahman, Zhiyuan Xu, Tom Kasputis, Yawen He, Lijuan Yuan, R Clay Wright, Juhong Chen. Engineered Yeast Displaying Specific Norovirus-Binding Nanobodies for the Concentration and Detection of Human Norovirus in Food Matrix. Journal of agricultural and food chemistry. 2023 Jun 07;71(22):8665-8672