On Terminal Alkynes that Can React with Active-Site Cysteine Nucleophiles in Proteases.
Ekkebus, R., Van Kasteren, S.I., Kulathu, Y., Scholten, A., Berlin, I., Geurink, P.P., De Jong, A., Goerdayal, G., Neefjes, J., Heck, A.J.R., Komander, D., Ovaa, H.(2013) J.Am.Chem.Soc. 135: 2867
- PubMed: 23387960 
- DOI: 10.1021/ja309802n
- PubMed Abstract: 
Active-site directed probes are powerful in studies of enzymatic function. We report an active-site directed probe based on a warhead so far considered unreactive. By replacing the C-terminal carboxylate of ubiquitin (Ub) with an alkyne functionality ...