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Ling, Chuxuan; Jin, Zhicheng; Yeung, Justin; da Silva, Elany Barbosa; Chang, Yu-Ci; He, Tengyu; Yim, Wonjun; O’Donoghue, Anthony J.; Jokerst, Jesse V.
Chemical communications (Cambridge, England), 10/2023, Volume: 59, Issue: 83Journal Article
We report here a colorimetric method for rapid detection of norovirus based on the valence-driven peptide-AuNP interactions. We engineered a peptide sequence named K1 with a cleavage sequence in between two lysine residues. The positively charged lysine groups aggregated the negatively charged nanoparticles leading to a purple color change. There was a red color when the cleavage sequence was digested by the Southampton norovirus 3C-like protease (SV3CP)—a protease involved in the life cycle of Human norovirus (HNV). The limit of detection was determined to be 320 nM in Tris buffer. We further show that the sensor has good performance in exhaled breath condensate, urine, and faecal matter. This research provides a potential easy and quick way to selectively detect HNV.
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