Fucose-1-phosphate guanylyltransferase is an enzyme that in humans is encoded by the FPGTgene.[1][2]
L-fucose is a key sugar in glycoproteins and other complex carbohydrates since it may be involved in many of the functional roles of these macromolecules, such as in cell-cell recognition. The fucosyl donor for these fucosylated oligosaccharides is GDP-beta-L-fucose. There are two alternate pathways for the biosynthesis of GDP-fucose; the major pathway converts GDP-alpha-D-mannose to GDP-beta-L-fucose. The protein encoded by this gene participates in an alternate pathway that is present in certain mammalian tissues, such as liver and kidney, and appears to function as a salvage pathway to reutilize L-fucose arising from the turnover of glycoproteins and glycolipids. This pathway involves the phosphorylation of L-fucose to form beta-L-fucose-1-phosphate, and then condensation of the beta-L-fucose-1-phosphate with GTP by fucose-1-phosphate guanylyltransferase to form GDP-beta-L-fucose.[2]
References
↑Pastuszak I, Ketchum C, Hermanson G, Sjoberg EJ, Drake R, Elbein AD (Dec 1998). "GDP-L-fucose pyrophosphorylase. Purification, cDNA cloning, and properties of the enzyme". J Biol Chem. 273 (46): 30165–74. doi:10.1074/jbc.273.46.30165. PMID9804772.
Quirk S, Seley KL (2005). "Identification of catalytic amino acids in the human GTP fucose pyrophosphorylase active site". Biochemistry. 44 (39): 13172–8. doi:10.1021/bi051288d. PMID16185085.
Quirk S, Seley KL (2005). "Substrate discrimination by the human GTP fucose pyrophosphorylase". Biochemistry. 44 (32): 10854–63. doi:10.1021/bi0503605. PMID16086588.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID9373149.
Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID8125298.