Back to Search
Start Over
Development of a sensitive separation and quantification method for sialyl Lewis X and Lewis X involving anion-exchange chromatography: biochemical characterization of alpha1-3 fucosyltransferase-VII.
- Source :
-
Journal of biochemistry [J Biochem] 2004 Nov; Vol. 136 (5), pp. 723-31. - Publication Year :
- 2004
-
Abstract
- The biosynthesis of the carbohydrate antigen sialyl Lewis X (sLe(x)) in human leukocytes is mediated by alpha1-3 fucosyltransferase-VII (FucT-VII), which catalyzes the transfer of fucose from GDP-beta-fucose to the 3-OH of alpha2-3 sialyl N-acetyllactosamine (SA-LN). We developed a simple method for quantitating the reaction product of FucT-VII involving Anion-Exchange Chromatography (AEC). The AEC assay involved the separation of a radio-labeled acceptor from the unreacted nucleotide sugars with 0-0.5 M NH(4)OAc (pH9.0) on QAE-Toyopearl 550C. Furthermore, this assay enabled the separation of the fucosylated products of sialylated and non-sialylated oligosaccharides with this column. Analysis of the FucT-VI reaction mixture showed that Lewis X (Le(x)) was eluted in the flow-through fraction and sLe(x) was eluted with 0.1 M NH(4)OAc, and these products were clearly separated from the fraction of unreacted GDP-[(3)H]fucose. Therefore, this method could be a powerful tool for the characterization of recombinant FucT-VII and for establishing a high-throughput screening system for FucT-VII inhibitors. Beside FucT-VII, this method will be applicable to the assaying of many different glycosyltransferases, including sialyltransferases and glucosaminyltransferases, which are reactive to alpha2-3 SA-LN or N-acetyllactosamine sequences.
- Subjects :
- Catalysis
Chromatography, Ion Exchange methods
Enzyme Inhibitors pharmacology
Ethylmaleimide pharmacology
Fucosyltransferases antagonists & inhibitors
Guanosine Diphosphate pharmacology
Humans
Lewis X Antigen analysis
Oligosaccharides analysis
Recombinant Proteins antagonists & inhibitors
Recombinant Proteins chemistry
Sensitivity and Specificity
Sialyl Lewis X Antigen
Fucosyltransferases chemistry
Lewis X Antigen chemistry
Oligosaccharides chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 0021-924X
- Volume :
- 136
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Journal of biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 15632313
- Full Text :
- https://doi.org/10.1093/jb/mvh179