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- W1720344590 abstract "The sialyl Lewis x determinant (NeuAc alpha 2,3Gal beta 1, 4[Fuc alpha 1,3]GlcNAc) is an essential component of leukocyte counterreceptors for E-selectin and P-selectin. The final step in sialyl Lewis x synthesis is catalyzed by alpha-1,3-fucosyltransferases acting on sialylated glycoconjugate precursors. Cultured human leukocytic cell lines express an alpha-1,3-fucosyltransferase gene termed Fuc-TIV or ELFT but do not express the other three cloned human alpha-1,3-fucosyltransferase genes to any significant degree. The physiological role of Fuc-TIV/ELFT in sialyl Lewis x biosynthesis is uncertain, however, since it can catalyze the synthesis of this determinant in some, but not all, transfected cell lines in a manner that is dependent upon the glycosylation phenotype of the host cell. We report here the molecular cloning of a cDNA encoding a new human leukocyte alpha-1,3-fucosyltransferase, termed Fuc-TVII, capable of synthesizing the sialyl Lewis x moiety. The cDNA sequence predicts a 341-amino acid-long type II transmembrane protein typical of mammalian glycosyltransferases. When expressed in mammalian cells, the Fuc-TVII cDNA directs the synthesis of cell surface sialyl Lewis x moieties but not the Lewis x, Lewis a, sialyl Lewis a, or VIM-2 determinants. Fuc-TVII can efficiently utilize alpha-2,3-sialyllactosamine in vitro to form the sialyl Lewis x tetrasaccharide but does not utilize lactosamine to form the Lewis x moiety. Northern blot analyses show that the Fuc-TVII gene is transcribed in HL-60 cells, a human promyelocytic cell line, and in YT cells, a natural killer-like cell line. Fuc-TVII represents a leukocytic alpha-1,3-fucosyltransferase that can participate in selectin ligand synthesis via its ability to catalyze the synthesis of sialyl Lewis x determinants." @default.
- W1720344590 created "2016-06-24" @default.
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- W1720344590 date "1994-06-01" @default.
- W1720344590 modified "2023-10-18" @default.
- W1720344590 title "Molecular cloning of a cDNA encoding a novel human leukocyte alpha-1,3-fucosyltransferase capable of synthesizing the sialyl Lewis x determinant" @default.
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- W1720344590 doi "https://doi.org/10.1016/s0021-9258(19)89461-9" @default.
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