A mutant hydrolase optionally fused to a protein of interest is provided. The mutant hydrolase is capable of forming a bond with a substrate for the corresponding nonmutant (wild-type) hydrolase which is more stable than the bond formed between the wild-type hydrolase and the substrate and has at least two amino acid substitutions relative to the wild-type hydrolase. Substrates for hydrolases comprising one or more functional groups are also provided, as well as methods of using the mutant hydrolase and the substrates of the invention. Also provided is a fusion protein capable of forming a stable bond with a substrate and cells which express the fusion protein.
提供了一种可与相关蛋白质融合的突变
水解酶。突变型
水解酶能够与相应的非突变型(野生型)
水解酶的底物形成键合,这种键合比野生型
水解酶与底物之间形成的键合更稳定,并且相对于野生型
水解酶至少有两个
氨基酸取代。本发明还提供了包含一个或多个官能团的
水解酶底物,以及使用本发明的突变
水解酶和底物的方法。还提供了一种能与底物形成稳定结合的融合蛋白以及表达该融合蛋白的细胞。