LMPD Database

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LMP012703

UniProt Annotations

Entry Information
Gene NameST3 beta-galactoside alpha-2,3-sialyltransferase 3
Protein EntrySIAT6_RAT
UniProt IDQ02734
SpeciesRat
Comments
Comment typeDescription
Catalytic ActivityCMP-N-acetylneuraminate + beta-D-galactosyl- (1->4)-N-acetyl-D-glucosaminyl-glycoprotein = CMP + alpha-N- acetylneuraminyl-(2->3)-beta-D-galactosyl-(1->4)-N-acetyl-D- glucosaminyl-glycoprotein.
FunctionCatalyzes the formation of the NeuAc-alpha-2,3-Gal-beta- 1,4-GlcNAc-, NeuAc-alpha-2,3-Gal-beta-1,3-GlcNAc- or NeuAc-alpha- 2,3-Gal-beta-1,3-GalNAc- sequences found in terminal carbohydrate groups of glycoproteins and glycolipids. The highest activity is toward Gal-beta-1,3-GlcNAc and the lowest toward Gal-beta-1,3- GalNAc (By similarity)
PathwayProtein modification; protein glycosylation.
PtmThe soluble form derives from the membrane form by proteolytic processing.
SimilarityBelongs to the glycosyltransferase 29 family
Subcellular LocationGolgi apparatus, Golgi stack membrane; Single-pass type II membrane protein. Secreted. Note=Membrane- bound form in trans cisternae of Golgi. Secreted into the body fluid.
Tissue SpecificityFound in all tissues tested. High expression found in brain, liver, kidney, colon, heart and lung.