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Human ubiquitin (aa1-76) (Accession Nr. P0CG47) is site-specifically conjugated to a single Cyanine 5 (Cy5) moiety. All lysines are available along with a fully functional C-terminus, making it ideal for chain formation using the E1-E2 and E3 conjugation cascade.
Crossreactivity
Human
Application
Protein-Based TR-FRET Pair Acceptor. Typical working concentration range is 250nM-500nM. Best working concentration needs to be empirically determined by the type of application by the end user. Cy5-Ubiquitin has an excitation maximum 646nm and an emission maximum 662nm.
Label/Conjugates
Cy5
MW
~9kDa
Purity
≥98% (LCMS)
Concentration
Lot dependent.
Accession Number
P0CG47
Formulation
Liquid. In 50mM HEPES pH 7.5, 50mM sodium chloride.
Ubiquitin is a highly conserved protein that plays a major role in the ubiquitination pathway, which is conserved from yeast to mammals. Ubiquitination, the conjugation of ubiquitin to other proteins through a covalent bond between its C-terminal glycine and the ε-amino group of lysine residues or the α-amino group of an N- terminal methionine onto proteins is essential for many cellular processes primarily linked to protein degradation. This process involves three steps with specific groups of enzymes in an ATP depended manner, which are activation with ubiquitin-activating enzymes (E1s), conjugation with ubiquitin-conjugating enzymes (E2s) and ligation with ubiquitin ligases (E3s). This Europium Cryptate Ubiquitin is ideal for measuring Ub chain conjugation or deconjugation using TR-FRET measurement. Its TR-FRET pair is Europium-Cryptate-Ubiquitin.