| Name
|
 ST3GAL1
|
| Full Name |
CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 1 |
| Synonyms |
Alpha 2,3-ST 1, Beta-galactoside alpha-2,3-sialyltransferase 1, Gal-NAc6S, Gal-beta-1,3-GalNAc-alpha-2,3-sialyltransferase, SIATFL, ST3Gal I, ST3GalI, ST3GalA.1, ST3O, Sialyltransferase 4A, SIAT4-A | SIAT4, SIAT4A |
| Primary ID |
Q11201 |
| Links |
 -  -  |
| Type |
protein |
| Relations |
1 |
| Function |
A beta-galactoside alpha2-3 sialyltransferase involved in terminal sialylation of glycoproteins and glycolipids (PubMed:31784620, PubMed:8027041). Catalyzes the transfer of sialic acid (N-acetyl-neuraminic acid; Neu5Ac) from the nucleotide sugar donor CMP-Neu5Ac onto acceptor Galbeta-(1->3)-GalNAc-terminated glycoconjugates through an alpha2-3 linkage (PubMed:31784620, PubMed:8027041). Adds sialic acid to the core 1 O-glycan, Galbeta-(1->3)-GalNAc-O-Ser/Thr, which is a major structure of mucin-type O-glycans. As part of a homeostatic mechanism that regulates CD8-positive T cell numbers, sialylates core 1 O-glycans of T cell glycoproteins, SPN/CD43 and PTPRC/CD45. Prevents premature apoptosis of thymic CD8-positive T cells prior to peripheral emigration, whereas in the secondary lymphoid organs controls the survival of CD8-positive memory T cells generated following a successful immune response (By similarity). Transfers sialic acid to asialofetuin, presumably onto Galbeta-(1->3)-GalNAc-O-Ser (By similarity). Sialylates GM1a, GA1 and GD1b gangliosides to form GD1a, GM1b and GT1b, respectively (PubMed:8027041) (By similarity). |
3.0
transcriptional regulation