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Description_x000D_
General description_x000D_
Human ST6Gal-I (β-galactoside α-2,6-sialyltransferase 1) is a member of the CAZy family GT29._x000D_
Application_x000D_
Highly active α2-6 sialyltransferase has been used to prepare high levels of disialylated fragment crystals._x000D_
α-2,6-Sialyltransferase from Photobacterium damsela has been used in resialylation and restoration of sialic acids (SAs) in HRT-18G cells._x000D_
Biochem/physiol Actions_x000D_
The terminal step of complex N-glycan biosynthesis is catalysed by α-2,6-sialyltransferase (STs). Bacterial α(2,6)-STs possesses broader acceptor substrate specificity when compared to eukaryotic α(2,6)-STs._x000D_
Sialyltransferase transfers Neu5Ac from CMP-Neu5Ac to the galactosyl terminus of acceptor molecules including glycoproteins, glycolipids, and oligosaccharides._x000D_
Unit Definition_x000D_
One unit will catalyze the formation of 1 μmol Neu-5-Ac-α-2,6-LacMU from CMP-Neu-5-Ac and Lac-β−OMU per minute at 37 °C at pH 8.0._x000D_
Physical form_x000D_
Supplied as a lyophilized powder containing Tris-HCl and NaCl._x000D_
Analysis Note_x000D_
Enzymatic activity assays are performed in Tris-HCl buffer (100 mM, pH 8.0) containing CMP-Neu-5-Ac (1 mM) and Lac-β−OMU (1 mM) at 37 °C for 30 min and analyzed using HPLC with a fluorescence detector (excitation at 325 nm and emission at 372 nm).
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