Expression of functional human sialyltransferases ST6GalNAc5 and ST6GalNAc6 in Pichia pastoris.

ABSTRACT: The two sialyltransferases in the ST6GALNAC subfamily (EC 2.4.99.-; CAZy family GT29), ST6GalNAc5 and ST6GalNAc6, catalyze the formation of the linkage from the sialic acid moiety to the C6 position of N-acetylgalactosamine (GalNAc) as well as to N-acetylglucosamine (GlcNAc), and are known as α-2,6-sialyltransferases. This activity is interesting for the synthesis of the disialylated oligosaccharide disialyllacto-N-tetraose (DSLNT). Human sialyltransferases ST6GalNAc5 and ST6GalNAc6 produced in HEK293 cells are commercially available at a smaller scale. In this study, we demonstrated that ST6GalNAc5 and ST6GalNAc6 can be functionally expressed in Pichia pastoris X-33. The level of ST6GalNAc5 and ST6GalNAc6 expression and activity largely depended on the type of construct, as well as on exp

SUBMITTER: Krasnoselska G 

PROVIDER: S-EPMC12521282 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature