Protein: CMP-N-acetylneuraminate-beta-1,4-galactoside alpha-2,3-sialyltransferase (EC 2.4.3.6) (Beta-galactoside alpha-2,3-sialyltransferase 3) (Alpha 2,3-ST 3) (Gal beta-1,3(4) GlcNAc alpha-2,3 sialyltransferase) (N-acetyllactosaminide alpha-2,3-sialyltransferase) (ST3Gal III) (ST3GalIII) (ST3N) (Sialyltransferase 6) (Q11203)
Organism: Homo sapiens (Human)
Function: Catalyzes the formation of the NeuAc-alpha-2,3-Gal-beta-1,4-GlcNAc-, NeuAc-alpha-2,3-Gal-beta-1,3-GlcNAc- and 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.
Subcellular location: Golgi 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.
Sequence: MGLLVFVRNLLLALCLFLVLGFLYYSAWKLHLLQWEEDSNSVVLSFDSAGQTLGSEYDRLGFLLNLDSKLPAELATKYANFSEGACKPGYASALMTAIFPRFSKPAPMFLDDSFRKWARIREFVPPFGIKGQDNLIKAILSVTKEYRLTPALDSLRCRRCIIVGNGGVLANKSLGSRIDDYDIVVRLNSAPVKGFEKDVGSKTTLRITYPEGAMQRPEQYERDSLFVLAGFKWQDFKWLKYIVYKERVSASDGFWKSVATRVPKEPPEIRILNPYFIQEAAFTLIGLPFNNGLMGRGNIPTLGSVAVTMALHGCDEVAVAGFGYDMSTPNAPLHYYETVRMAAIKESWTHNIQREKEFLRKLVKARVITDLSSGI
InterPro domains: - IPR001675: Glycosyl transferase family 29 (family) [114-366]
- IPR012163: Sialyltransferase (family) [1-375]
- IPR051142: Glycosyltransferase 29 (family) [6-375]
- IPR038578: GT29-like superfamiliy (homologous_superfamily) [83-371]
Interaction partners: - mRNA turnover protein 4 homolog
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0003824 (catalytic activity), GO:0016740 (transferase activity), GO:0016757 (glycosyltransferase activity), GO:0008373 (sialyltransferase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0016032 (viral process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0019080 (viral gene expression), GO:0006807 (nitrogen compound metabolic process), GO:0070085 (glycosylation), GO:0019082 (viral protein processing), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901564 (organonitrogen compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0019538 (protein metabolic process), GO:0044249 (cellular biosynthetic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:0043413 (macromolecule glycosylation), GO:1901135 (carbohydrate derivative metabolic process), GO:0036211 (protein modification process), GO:1901566 (organonitrogen compound biosynthetic process), GO:0009059 (macromolecule biosynthetic process), GO:0006486 (protein glycosylation), GO:0043412 (macromolecule modification), GO:0009100 (glycoprotein metabolic process), GO:0034645 (cellular macromolecule biosynthetic process), GO:1901137 (carbohydrate derivative biosynthetic process), GO:0009101 (glycoprotein biosynthetic process), GO:0006493 (protein O-linked glycosylation), GO:0016266 (O-glycan processing)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005737 (cytoplasm), GO:0016020 (membrane), GO:0012505 (endomembrane system), GO:0031090 (organelle membrane), GO:0005794 (Golgi apparatus), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0098588 (bounding membrane of organelle), GO:0000139 (Golgi membrane), GO:0043231 (intracellular membrane-bounded organelle)