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General Comment |
Purification and characterization of the l-fucose transporter.
Leck JR, et al .
l-Fucose is a monosaccharide present in low levels in the serum. It is, however, a common structural component of glycoproteins. l-Fucose is accumulated in eukaryotic cells by a specific, facilitative diffusion transport system which has been designated the fucose transporter. In this study, purification of the transporter from mouse brain was performed by detergent extraction followed by ion-exchange and reactive dye ligand column chromatography. Purification was followed using a transport assay into reconstituted liposomes. A 111-fold purification with 5% yield was achieved from the crude homogenate. The apparent molecular weight of the protein was 57kDa. Transport was found to be saturable. The K(m) and V(max) values are estimated at 3microM and 275 pmol/min/mg, respectively. The tissue distribution of fucose transport was examined in liver, kidney, heart, lung, spleen, brain, muscle, adipose, ovary, pancreas, and thymus. Some fucose transport was found in all tissues examined. Very low levels were observed in the liver relative to all other tissues examined. The only monosaccharide which could inhibit the uptake of l-[5,6-(3)H]fucose was fucose itself.
NCBI Summary:
This gene encodes a GDP-fucose transporter that is found in the Golgi apparatus. Mutations in this gene result in congenital disorder of glycosylation type IIc. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2009]
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