Recombinant human UBA5 protein

UBA5 (ubiquitin-like modifier activating enzyme 5) belongs to the ubiquitin-activating E1 family and uBA5 subfamily. ubiquitin and ubiquitin-like proteins are known to be covalently conjugated to a variety of cellular substrates via a three-step enzymatic pathway. The ubiquitin-activating enzyme (E1) plays a key role in the first step of ubiquitination pathway to activate ubiquitin or ubiquitin-like proteins. uBA5 had been proved to activate an ubiquitin-like protein, ubiquitin-fold modifier 1 (ufm1), by forming a high-energy thioester bond. It localizes mainly in cytoplasm, while it mainly localizes to the nucleus in presence of SuMO2. Recombinant human uBA5 protein, fused to His-tag at N-terminus, was expressed in E. coli and purified by using conventional chromatography techniques.