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SERRS-based enzymatic probes for the detection of protease activity

Ingram, A. and Byers, L. and Faulds, K. and Moore, B.D. and Graham, D. (2008) SERRS-based enzymatic probes for the detection of protease activity. Journal of the American Chemical Society, 130 (36). pp. 11846-11847. ISSN 0002-7863

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Measurement of protease activity, for the first time using SERRS as a detection method, is reported herein. Synthetic introduction of phenylalanine to a benzotriazole azo dye allows the SERRS response to be 'switched off' and subsequent exposure to protease restores the SERRS response. The substrates exhibit varying reactivity for a range of proteases and allow for in situ, real-time analysis of protease reactivity. A limit of detection for one protease, Subtilisin carlsberg, was investigated and was established to be 50 ng ml−1.