Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid
Xanthan gum is a complex polysaccharide produced by Xanthomonas campestris, composed of pentasaccharide repeating units containing mannose, glucose and glucuronic acid (in the ratio 2:2:1) and pyruvic acid acetal and 0-acetyl residues in differing proportions Jansson et al. (1975) Carbohyd.Res. 45,...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0006291X_v102_n4_p1400_Ielpi http://hdl.handle.net/20.500.12110/paper_0006291X_v102_n4_p1400_Ielpi |
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paper:paper_0006291X_v102_n4_p1400_Ielpi2023-06-08T14:30:00Z Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid Ielpi, Luis Couso, Roberto O. Dankert, Marcelo Alberto bacterial polysaccharide glycolipid phosphoenolpyruvate pyruvic acid pyruvic acid derivative xanthan article biosynthesis ion exchange chromatography metabolism paper chromatography Xanthomonas Chromatography, DEAE-Cellulose Chromatography, Paper Glycolipids Phosphoenolpyruvate Polysaccharides, Bacterial Pyruvates Pyruvic Acid Xanthomonas Xanthan gum is a complex polysaccharide produced by Xanthomonas campestris, composed of pentasaccharide repeating units containing mannose, glucose and glucuronic acid (in the ratio 2:2:1) and pyruvic acid acetal and 0-acetyl residues in differing proportions Jansson et al. (1975) Carbohyd.Res. 45, 275-282). Previous work (Ielpi et al. FEBS Lett., in press) has shown that the pentasaccharide is first assembled on a pyrophosphate lipid and then polymerized to xanthan gum. It is now shown, using EDTA-treated cells and different combinations of the adequate [14C]labeled donors, that phosphoenol pyruvate provides the acetal residues and that the transfer occurs on the terminal mannose of the pentasaccharide-P-P-lipid, as judged by the solubility properties and DEAE-cellulose column chromatography of the compounds formed as well as by the behaviour of the substances liberated by mild acid and alkaline treatments and Smith degradation. The subsequent polymerization process leads to pyruvylated xanthan gum. © 1981 Academic Press, Inc. Fil:Ielpi, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Couso, R.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dankert, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1981 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0006291X_v102_n4_p1400_Ielpi http://hdl.handle.net/20.500.12110/paper_0006291X_v102_n4_p1400_Ielpi |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
bacterial polysaccharide glycolipid phosphoenolpyruvate pyruvic acid pyruvic acid derivative xanthan article biosynthesis ion exchange chromatography metabolism paper chromatography Xanthomonas Chromatography, DEAE-Cellulose Chromatography, Paper Glycolipids Phosphoenolpyruvate Polysaccharides, Bacterial Pyruvates Pyruvic Acid Xanthomonas |
spellingShingle |
bacterial polysaccharide glycolipid phosphoenolpyruvate pyruvic acid pyruvic acid derivative xanthan article biosynthesis ion exchange chromatography metabolism paper chromatography Xanthomonas Chromatography, DEAE-Cellulose Chromatography, Paper Glycolipids Phosphoenolpyruvate Polysaccharides, Bacterial Pyruvates Pyruvic Acid Xanthomonas Ielpi, Luis Couso, Roberto O. Dankert, Marcelo Alberto Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
topic_facet |
bacterial polysaccharide glycolipid phosphoenolpyruvate pyruvic acid pyruvic acid derivative xanthan article biosynthesis ion exchange chromatography metabolism paper chromatography Xanthomonas Chromatography, DEAE-Cellulose Chromatography, Paper Glycolipids Phosphoenolpyruvate Polysaccharides, Bacterial Pyruvates Pyruvic Acid Xanthomonas |
description |
Xanthan gum is a complex polysaccharide produced by Xanthomonas campestris, composed of pentasaccharide repeating units containing mannose, glucose and glucuronic acid (in the ratio 2:2:1) and pyruvic acid acetal and 0-acetyl residues in differing proportions Jansson et al. (1975) Carbohyd.Res. 45, 275-282). Previous work (Ielpi et al. FEBS Lett., in press) has shown that the pentasaccharide is first assembled on a pyrophosphate lipid and then polymerized to xanthan gum. It is now shown, using EDTA-treated cells and different combinations of the adequate [14C]labeled donors, that phosphoenol pyruvate provides the acetal residues and that the transfer occurs on the terminal mannose of the pentasaccharide-P-P-lipid, as judged by the solubility properties and DEAE-cellulose column chromatography of the compounds formed as well as by the behaviour of the substances liberated by mild acid and alkaline treatments and Smith degradation. The subsequent polymerization process leads to pyruvylated xanthan gum. © 1981 Academic Press, Inc. |
author |
Ielpi, Luis Couso, Roberto O. Dankert, Marcelo Alberto |
author_facet |
Ielpi, Luis Couso, Roberto O. Dankert, Marcelo Alberto |
author_sort |
Ielpi, Luis |
title |
Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
title_short |
Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
title_full |
Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
title_fullStr |
Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
title_full_unstemmed |
Xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-P-P-lipid |
title_sort |
xanthan cum biosynthesis pyruvic acid acetal residues are transferred from phosphoenolpyruvate to the pentasaccharide-p-p-lipid |
publishDate |
1981 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0006291X_v102_n4_p1400_Ielpi http://hdl.handle.net/20.500.12110/paper_0006291X_v102_n4_p1400_Ielpi |
work_keys_str_mv |
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_version_ |
1768544483898556416 |