Analysis of fluorogenic Smith degradation products of 7-(1,3-disulfonaphtyl)amino-disaccharides for linkage position analysis of carbohydrates.
The linkage position of a glycosidic bond to the reducing-end residue of a pyridylamino (PA-) sugar can be determined sensitively by Smith degradation and HPLC [K. Omichi and S. Hase, (1994) J. Biochem. 115, 429-434]. With the aim of enhancing the sensitivity of this method of linkage position analysis to the fmol-level, use of the 7-(1,3-disulfonaphtyl)amino (DSNA-) group instead of the PA-group as a fluorescent tag was examined. Smith degradation of DSNA-disaccharides with a DSNA-hexose, DSNA-N-acetylglucosamine, or DSNA-N-acetylgalactosamine reducing-end residue was carried out. HPLC and FAB-MS of the fluorogenic Smith degradation products showed that the DSNA-group was stable under the Smith degradation reaction conditions, and that the reaction proceeded in a manner similar to that using PA-disaccharides to give the predicted products. Fluorogenic Smith degradation products specific to the glycosidic linkage position were well separated by reversed-phase HPLC, and were easily assignable by comparing the HPLC elution positions with those of standard compounds. The method was successfully applied to analyzing the structure of an N-linked sugar chain.
Makino
Yasushi
Y
Department of Environmental Sciences, Faculty of Science, Osaka Women's University, Sakai, Osaka 590-0035, Japan.
Yonezaki
Kayoko
K
Omichi
Kaoru
K
D000818:Animals; D002236:Carbohydrate Conformation; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D004187:Disaccharides / Q000737:chemistry* / Q000378:metabolism; D005456:Fluorescent Dyes / Q000737:chemistry / Q000378:metabolism*; D015394:Molecular Structure; D009990:Oryzias; D010084:Oxidation-Reduction
D002241:Carbohydrates; D004187:Disaccharides; D005456:Fluorescent Dyes