中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | guanosine 5'-diphospho-D-mannose | —— | C16H25N5O16P2 | 605.346 |
[(2S,3S,4R,5R)-5-(2-氨基-6-氧代-3H-嘌呤-9-基)-3,4-二羟基-四氢呋喃-2-基]甲氧基-[[(2R,3R,4S,6S)-3,4-二羟基-6-甲基-5-氧代-四氢吡喃-2-基]氧基-羟基-磷酰]氧基-次磷酸 | GDP-4-keto-6-deoxy-α-D-mannose | 18186-48-6 | C16H23N5O15P2 | 587.331 |
—— | Guanosine 5'-triphosphate | 86-01-1 | C10H16N5O14P3 | 523.183 |
Chemical syntheses are reported for GDP-fucose (5), GDP-3-deoxy-fucose (6), and GDP-arabinose (7), the demethyl analog of 5. All three sugar nucleotides were found to act as donor substrates for an α(1 → 4) fucosyltransferase isolated from human milk when *BDGal(1 → 3)*BDGlcNAc-O(CH2)8COOMe (1) was used as the acceptor. The rate of transfer of sugar residues to 1 was measured using a coupled spectrophotometric assay and was found to be 100% (5), 2.3% (6), and 5.9% (7). The product Lea-active oligosaccharide analogs were identified by both an enzyme-linked immunosorbent assay (ELISA) and by 1H NMR spectroscopy. Keywords: glycosyltransferase, oligosaccharide synthesis, sugar-nucleotide analog, ELISA assay, fucosyltransferase.