AzGGK TFA is an unnatural amino acid. AzGGK TFA is site-specifically incorporated into proteins via genetic-code expansion. AzGGK TFA can be used as a site-specific probe for ubiquitylation and SUMOylation. AzGGK TFA is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.
References:
[1]. Fottner M, et al. Site-specific ubiquitylation and SUMOylation using genetic-code expansion and sortase. Nat Chem Biol. 2019 Mar;15(3):276-284.