Sequence analysis of chitooligosaccharides by matrix-assisted laser desorption ionization postsource decay mass spectrometry
| Autor: | Jasna Peter-Katalinić, Matthias C. Letzel, Jon M. Einarsson, Martin G. Peter, Johannes Gislason, Sven Bahrke, Sophie Haebel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Chitosan
Chromatography Polymers and Plastics Chemistry Molecular Sequence Data Oligosaccharides Chitin Bioengineering Trimer Random hexamer Mass spectrometry Reductive amination Biomaterials Gel permeation chromatography chemistry.chemical_compound Matrix-assisted laser desorption/ionization Carbohydrate Sequence Crustacea Spectrometry Mass Matrix-Assisted Laser Desorption-Ionization Materials Chemistry Animals Institut für Chemie Sequence Analysis |
| Popis: | Chitin/chitosan oligosaccharides composed of 2-acetamido-2-deoxy-D-glucopyranose (GlcNAc) and/or 2-amino-2-deoxy-D-glucopyranose (GlcN) were prepared by chemical degradation of chitin or chitosan and separated by gel permeation chromatography. Oligosaccharides obtained after enzymatic hydrolysis of chitosan [F(A) 0.19] with a fungal chitinase were derivatized by reductive amination with 2-aminoacridone and sequenced by matrix-assisted laser desorption ionization time-of-flight postsource decay (PSD) mass spectrometry (MS). The sequence of a trimer, D1A2, was established as D-A-A. The composition of a hexamer D3A3 was ca. 65% D-A-D-D-A-A and 35% D-D-A-D-A-A. The PSD MS of a nonamer D5A4-amac revealed four isobaric species D-X-Y-D-X-Y-D-A-A, where A is GlcNAc, D is GlcN, and X and Y (X not equal Y) are mutually either D or A. This structure motif was also observed in a dodecamer D7A5 which was composed of eight isobaric sequences of the general formula (D-X-Y)(3)-D-A-A. |
| Databáze: | OpenAIRE |
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