Detection of tyrosine and monitoring tyrosinase activity using an enzyme cascade-triggered colorimetric reaction

Huei Yu Chen, Yi Chun Yeh*

*此作品的通信作者

    研究成果: 雜誌貢獻期刊論文同行評審

    1 引文 斯高帕斯(Scopus)

    摘要

    The aromatic amino acid tyrosine is an essential precursor for the synthesis of catecholamines, including l-DOPA, tyramine, and dopamine. A number of metabolic disorders have been linked to abnormal tyrosine levels in biological fluids. In this study, we developed an enzyme cascade-triggered colorimetric reaction for the detection of tyrosine, based on the formation of yellow pigment (betalamic acid) and red fluorometric betaxanthin. Tyrosinase converts tyrosine to l-DOPA, and DOPA-dioxygenase catalyzes oxidative cleavage of l-DOPA into betalamic acid. Response is linear for tyrosine from 5 to 100 μM, and the detection limit (LOD) is 2.74 μM. The enzyme cascade reaction was applied to monitor tyrosinase activity and tyrosinase inhibition assays. Lastly, the performance of the proposed biosensor proved successful in the analysis of urine samples without the need for pre-treatment. This journal is

    原文英語
    頁(從 - 到)29745-29750
    頁數6
    期刊RSC Advances
    10
    發行號50
    DOIs
    出版狀態已發佈 - 2020 八月 12

    ASJC Scopus subject areas

    • 化學 (全部)
    • 化學工程 (全部)

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