Protein: Alpha-N-acetyl-neuraminyl-2,3-beta-galactosyl-1,3-N-acetyl-galactosaminide alpha-2,6-sialyltransferase (EC 2.4.3.7) (NeuAc-alpha-2,3-Gal-beta-1,3-GalNAc-alpha-2,6-sialyltransferase) (ST6GalNAc IV) (ST6GalNAcIV) (Sialyltransferase 3C) (SIAT3-C) (Sialyltransferase 7D) (SIAT7-D) (Q9H4F1)
Organism: Homo sapiens (Human)
Function: Transfers the sialyl group (N-acetyl-alpha-neuraminyl or NeuAc) from CMP-NeuAc to the GalNAc residue on the NeuAc-alpha-2,3-Gal-beta-1,3-GalNAc sequence of glycoproteins and glycolipids forming an alpha-2,6-linkage. Produces branched type disialyl structures by transfer of a sialyl group onto a GalNAc residue inside the backbone core chains. Prefers O-glycans to glycoproteins or glycolipids.
Subcellular location: Golgi apparatus membrane {ECO:0000250}; Single-pass type II membrane protein {ECO:0000250}.
Sequence: MKAPGRLVLIILCSVVFSAVYILLCCWAGLPLCLATCLDHHFPTGSRPTVPGPLHFSGYSSVPDGKPLVREPCRSCAVVSSSGQMLGSGLGAEIDSAECVFRMNQAPTVGFEADVGQRSTLRVVSHTSVPLLLRNYSHYFQKARDTLYMVWGQGRHMDRVLGGRTYRTLLQLTRMYPGLQVYTFTERMMAYCDQIFQDETGKNRRQSGSFLSTGWFTMILALELCEEIVVYGMVSDSYCREKSHPSVPYHYFEKGRLDECQMYLAHEQAPRSAHRFITEKAVFSRWAKKRPIVFAHPSWRTE
InterPro domains: - IPR001675: Glycosyl transferase family 29 (family) [66-282]
- IPR038578: GT29-like superfamiliy (homologous_superfamily) [53-295]
Interaction partners: - CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 1
- CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 2
- Alpha-2-HS-glycoprotein
- Alpha-2,8-sialyltransferase 8B
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0003824 (catalytic activity), GO:0016740 (transferase activity), GO:0005515 (protein binding), GO:0016757 (glycosyltransferase activity), GO:0008373 (sialyltransferase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0008037 (cell recognition), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901576 (organic substance biosynthetic process), GO:1901564 (organonitrogen compound metabolic process), GO:0006629 (lipid metabolic process), GO:0019538 (protein metabolic process), GO:0044255 (cellular lipid metabolic process), GO:0009988 (cell-cell recognition), GO:0005975 (carbohydrate metabolic process), GO:0043603 (amide metabolic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:1901135 (carbohydrate derivative metabolic process), GO:0009311 (oligosaccharide metabolic process), GO:0009100 (glycoprotein metabolic process), GO:0006643 (membrane lipid metabolic process), GO:0016051 (carbohydrate biosynthetic process), GO:0006672 (ceramide metabolic process), GO:1903509 (liposaccharide metabolic process), GO:0006665 (sphingolipid metabolic process), GO:0006677 (glycosylceramide metabolic process), GO:0009312 (oligosaccharide biosynthetic process), GO:0006664 (glycolipid metabolic process), GO:0006687 (glycosphingolipid metabolic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0012505 (endomembrane system), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0016020 (membrane), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0031090 (organelle membrane), GO:0005794 (Golgi apparatus), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0098588 (bounding membrane of organelle), GO:0070013 (intracellular organelle lumen), GO:0000139 (Golgi membrane), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)