Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0155339 (Brown)
 12,436 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A semi-quantitative fingerprinting method has been developed for the structural analysis of skeletal keratan sulphates. This involves the digestion of the parent keratan sulphate chains with the enzyme keratanase II (Bacillus sp.), followed by reduction of the resulting oligosaccharides with sodium borohydride and chromatography on a Dionex AS4A-SC column. This column has been calibrated for the elution positions of 26 previously characterized oligosaccharides (Brown et al., Biochemistry, 33, 4836-4846, 1994; Brown et al., Eur. J. Biochem., 224, 281-308, 1994). The technique permits sample analysis with pulsed electrochemical detection (sensitive to approximately 5 ng of oligosaccharide) or by monitoring [3H] or [35S] radiolabel (potentially sensitive to approximately 1 pg or less of an oligosaccharide); thus permitting the study of sub-microgram amounts of keratan sulphates. Skeletal keratan sulphates from a number of sources have been examined in this chromatographic system and their structural features are discussed.
 ...
PMID:Skeletal keratan sulphate structural analysis using keratanase II digestion followed by high-performance anion-exchange chromatography. 765 68

Skeletal keratan sulfates have been degraded by three independent techniques and the resultant, borohydride-reduced, disaccharides have been characterised by NMR spectroscopy. The 1H and 13C (where available) chemical shifts are reported for the following substances, where GalNAc-ol represents N-acetyl-galactosaminitol, GlcNAc-ol represents N-acetyl-glucosaminitol, GlcNAc(6S)-ol represents N-acetyl-glucosaminitol 6-O-sulfate and 2,5AnMan(6S)-ol represents 2,5-anhydro-D-mannitol 6-O-sulfate. (a) GlcNAc(6S)beta(1-3)Gal-ol, isolated after keratanase (from Pseudomonas sp.) digestion. (b) Gal beta(1-4)GlcNAc(6S)-ol and Gal(6S)beta(1-4) GlcNAc(6S)-ol, the 1H chemical shifts have been reported previously [Brown, G. M., Huckerby, T. N., Morris, H. G., Abram, B. L. & Nieduszynski, I. A. (1994) Biochemistry 33, 4836-4846; Brown, G. M., Huckerby, T. N. & Nieduszynski, I. A. (1994) Eur. J. Biochem. 224, 281-308], GlcNAc(6S)beta(1-6)GalNAc-ol, [formula: see text], [formula: see text], all isolated after keratanase II digestion. (c) Gal beta(1-4)2,5AnMan(6S)-ol and Gal(6S)beta(1-4)2,5AnMan(6S)-ol, isolated after hydrazinolysis and nitrous acid digestion. In addition, the model compounds Gal beta(1-4)GlcNAc-ol and Gal beta(1-6)GlcNAc-ol have also been examined by 1H and 13C NMR spectroscopy. The value of these data for microstructural analysis of keratan sulfate samples is discussed.
 ...
PMID:Spectroscopic characterisation of disaccharides derived from keratan sulfates. 774 22

A previously developed method for the structural fingerprinting of keratan sulfates (Brown et al., Glycobiology, 5, 311-317, 1995) has been adapted for use with oligosaccharides fluorescently labeled with 2-aminobenzoic acid following keratanase II digestion. The oligosaccharides are separated by high-pH anion-exchange chromatography on a Dionex AS4A-SC column. This methodology permits quantitative analysis of labeled oligosaccharides which can be detected at the sub-nanogram ( approximately 100 fmol) level. Satisfactory calibration of this method can be achieved using commercial keratan sulfate standards. Keratan sulfates from porcine brain phosphocan and human ovarian tumors have been examined using this methodology, and their structural features are discussed.
 ...
PMID:An improved method for the structural profiling of keratan sulfates: analysis of keratan sulfates from brain and ovarian tumors. 1002 66