| First Author | Zhou D | Year | 2000 |
| Journal | J Biol Chem | Volume | 275 |
| Issue | 30 | Pages | 22631-4 |
| PubMed ID | 10837462 | Mgi Jnum | J:70300 |
| Mgi Id | MGI:2136876 | Doi | 10.1074/jbc.C000263200 |
| Citation | Zhou D, et al. (2000) The beta 1,3-galactosyltransferase beta 3GalT-V is a stage-specific embryonic antigen-3 (SSEA-3) synthase. J Biol Chem 275(30):22631-4 |
| abstractText | We have previously reported the molecular cloning of beta1, 3-galactosyltransferase-V (beta3GalT-V), which catalyzes the transfer of Gal to GlcNAc-based acceptors with a preference for the core3 O-linked glycan GlcNAc(beta1,3)GalNAc structure. Further characterization indicated that the recombinant beta3GalT-V enzyme expressed in Sf9 insect cells also utilized the glycolipid Lc3Cer as an efficient acceptor. Surprisingly, we also found that beta3GalT-V catalyzes the transfer of Gal to the terminal GalNAc unit of the globoside Gb4, thereby synthesizing the glycolipid Gb5, also known as the stage-specific embryonic antigen-3 (SSEA-3). The SSEA-3 synthase activity of beta3GalT-V was confirmed in vivo by stable expression of the human beta3GalT-V gene in F9 mouse teratocarcinoma cells, as detected with the monoclonal antibody MC-631 by flow cytometry analysis and immunostaining of extracted glycolipids. The biological relation between SSEA-3 formation and beta3GalT-V was further documented by showing that F9 cells treated with the differentiation-inducing agent retinoic acid induced the expression of both the SSEA-3 epitope and the endogenous mouse beta3GalT-V gene. This study represents the first example of a glycosyltransferase, which utilizes two kinds of sugar acceptor substrates without requiring any additional modifier molecule. |
