A Photoinducible 1,3-Dipolar Cycloaddition Reaction for Rapid, Selective Modification of Tetrazole-Containing Proteins


  • Q.L. is grateful to the Petroleum Research Fund, University at Buffalo, and New York State Center of Excellence in Bioinformatics and Life Sciences for financial support.


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Reactive but biologically inert: The bioorthogonal title reaction enables highly specific chemical modifications, such as lipidation, of engineered proteins containing a diphenyltetrazole group (see scheme). The cycloaddition in biological media is extremely fast (≤1 min) and tolerant of proteinaceous groups. Strongly fluorescent pyrazoline cycloadducts are generated with simple alkenes.