Occurrence of cellobiose residues directly linked to galacturonic acid in pectic polysaccharides (English)

In: Carbohydrate Polymers   ;  87 ,  1  ;  620-626  ;  2011
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Highlights ► The pectic polysaccharides from plum, pear, and commercial citrus pectin were submitted to a selective hydrolysis with endo-polygalacturonase. ► The low molecular weight oligosaccharides (<1kDa) were analysed by mass spectrometry and methylation analysis. ► It was observed the occurrence of single Glc and Glc–Glc residues directly linked to GalA. ► The Glc disaccharides were β-1,4-linked.

Abstract The study carried out in this work concerns the structural characterization of pectic polysaccharides from plum (Prunus domestica L.) and pear (Pyrus communis L.) cell walls and commercial pectic polysaccharides, obtained from Citrus. The α-(1→4)-d-galacturonic acid backbone was submitted to a selective hydrolysis with endo-polygalacturonase (EPG) and the fractions with low molecular weight (<1kDa) obtained by size-exclusion chromatography were analysed by mass spectrometry using electrospray ionisation (ESI-MS). The ESI-MS spectra obtained revealed the presence of several [M+Na]+ ions of pectic oligosaccharides identified as belonging to different series, including oligosaccharides constituted only by galacturonic acid residues (GalAn, n =1–5) and galacturonic acid residues substituted by pentose residues (GalA3Pentn, n =1–2). Surprisingly, it was also observed the occurrence of galacturonic acid residues substituted by hexose residues (GalAnHexm, n =2–4, m =1–2). The fragmentation of the observed [M+Na]+ ions, obtained under ESI-MS/MS and MSn allowed to confirm the proposed structures constituent of these pectic oligosaccharides. Furthermore, the ESI-MSn spectra of the ions that could be identified as GalAnHexm (n =2–4, m =1–2) confirmed the presence of Hex or Hex2 residues linked to a GalA residue. Methylation analysis showed the presence, in all EPG treated samples, of terminally linked arabinose, terminally and 4-linked xylose, and terminally and 4-linked glucose. The occurrence of GalA substituted by Glc, and Glc-β-(1→4)–Glc are structural features that, as far as we know, have never been reported to occur in pectic polysaccharides.

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784
Chitin nanocrystals grafted with poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and their effects on thermal behavior of PHBV
Wang, Jing / Wang, Zongbao / Li, Jun / Wang, Bingjie / Liu, Ji / Chen, Peng / Miao, Menghe / Gu, Qun | 2011
790
Micelles/sodium-alginate composite gel beads: A new matrix for oral drug delivery of indomethacin
Huang, Xiujuan / Xiao, Yan / Lang, Meidong | 2011
799
Outstanding reinforcing effect of highly oriented chitin whiskers in PVA nanocomposites
Uddin, Ahmed Jalal / Fujie, Masahiro / Sembo, Shinichiro / Gotoh, Yasuo | 2011
806
Facilitating high-force single-polysaccharide stretching using covalent attachment of one end of the chain
Fellah, Abdenor / Belmiloud, Naser / Haverkamp, Richard G. / Hemar, Yacine / Otter, Don / Williams, Martin A.K. | 2011
816
Effects of temperature and cultivar on nanostructural changes of water-soluble pectin and chelate-soluble pectin in peaches
Zhang, Lifen / Chen, Fusheng / Yang, Hongshun / Ye, Xingqian / Sun, Xiaoyang / Liu, Donghong / Yang, Bao / An, Hongjie / Deng, Yun | 2011
822
Semi-synthesis of chondroitin sulfate-E from chondroitin sulfate-A
Cai, Chao / Solakyildirim, Kemal / Yang, Bo / Beaudet, Julie M. / Weyers, Amanda / Linhardt, Robert J. / Zhang, Fuming | 2011
830
Effects of external factors on the arrangement of plate-liked Fe2O3 nanoparticles in cellulose scaffolds
Liu, Shilin / Li, Ran / Zhou, Jinping / Zhang, Lina | 2011
839
Antimicrobial activity of silver nanoparticle impregnated bacterial cellulose membrane: Effect of fermentation carbon sources of bacterial cellulose
Yang, Guang / Xie, Jianjian / Hong, Feng / Cao, Zhangjun / Yang, Xuexia | 2011
846
In vitro prebiotic evaluation of exopolysaccharides produced by marine isolated lactic acid bacteria
Hongpattarakere, Tipparat / Cherntong, Nantina / Wichienchot, Santad / Kolida, Sofia / Rastall, Robert A. | 2011
853
Structural details of pectic galactan from the secondary cell walls of flax (Linum usitatissimum L.) phloem fibres
Mikshina, Polina V. / Gurjanov, Oleg P. / Mukhitova, Fakhima K. / Petrova, Anna A. / Shashkov, Alexander S. / Gorshkova, Tatyana A. | 2011
862
Structure and effect of sulfated fucose branches on anticoagulant activity of the fucosylated chondroitin sulfate from sea cucumber Thelenata ananas
Wu, Mingyi / Huang, Rong / Wen, Dandan / Gao, Na / He, Jiangbo / Li, Zi / Zhao, Jinhua | 2011
869
N-(2-(2-pyridyl)ethyl)chitosan: Synthesis, characterization and sorption properties
Bratskaya, S.Yu. / Azarova, Yu.A. / Matochkina, E.G. / Kodess, M.I. / Yatluk, Yu.G. / Pestov, A.V. | 2011
876
Prevention of oxidative stress in Chang liver cells by gallic acid-grafted-chitosans
Senevirathne, Mahinda / Jeon, You-Jin / Kim, Yong-Tae / Park, Pyo-Jam / Jung, Won-Kyo / Ahn, Chang-Bum / Je, Jae-Young | 2011
881
New hydrogels based on symmetrical aromatic anhydrides: Synthesis, characterization and metal ion adsorption evaluation
Kavianinia, Iman / Plieger, Paul G. / Kandile, Nadia G. / Harding, David R.K. | 2011
894
Analysis of carboxylate groups in oxidized never-dried cellulose II catalyzed by TEMPO and 4-acetamide-TEMPO
Zhang, Kai / Fischer, Steffen / Geissler, Andreas / Brendler, Erica | 2011
901
Preparation and characterization of TiO2-regenerated cellulose inorganic–polymer hybrid membranes for dehydration of caprolactam
Zhu, Tianrong / Lin, Yanwen / Luo, Yunbai / Hu, Xuan / Lin, Wenhai / Yu, Ping / Huang, Chi | 2011
910
Characterization and potential applications of high molecular weight dextran produced by Leuconostoc mesenteroides AA1
Aman, Afsheen / Siddiqui, Nadir Naveed / Qader, Shah Ali Ul | 2011
916
Sulfated @b-d-mannan from green seaweed Codium vermilara
Fernandez, P. V. / Estevez, J. M. / Cerezo, A. S. / Ciancia, M. | 2012
916
Sulfated β-d-mannan from green seaweed Codium vermilara
Fernández, Paula Virginia / Estevez, José Manuel / Cerezo, Alberto Saúl / Ciancia, Marina | 2011
920
Synthesis and characterization of chitosan–PEG–Ag nanocomposites for antimicrobial application
Krishna Rao, K.S.V. / Ramasubba Reddy, P. / Lee, Yong-Ill / Kim, Changdae | 2011
926
Electrospinning of hyaluronic acid nanofibers from aqueous ammonium solutions
Brenner, Eric K. / Schiffman, Jessica D. / Thompson, Ebony A. / Toth, Laura J. / Schauer, Caroline L. | 2011
930
Production of microbial cellulose: Response surface methodology approach
Panesar, Parmjit S. / Chavan, Yogita / Chopra, Harish K. / Kennedy, John F. | 2011
935
Degradation of chitosan in solution by gamma irradiation in the presence of hydrogen peroxide
Hien, Nguyen Quoc / Phu, Dang Van / Duy, Nguyen Ngoc / Lan, Nguyen Thi Kim | 2011
939
Improvement of microwave-assisted hydrolysis of cassava pulp and tapioca flour by addition of activated carbon
Hermiati, Euis / Azuma, Jun-ichi / Tsubaki, Shuntaro / Mangunwidjaja, Djumali / Sunarti, Titi C. / Suparno, Ono / Prasetya, Bambang | 2011
943
Synthesis, characterization and in vitro cytocompatibility studies of chitin nanogels for biomedical applications
Rejinold, N. Sanoj / Nair, Amrita / Sabitha, M. / Chennazhi, K.P. / Tamura, H. / Nair, S.V. / Jayakumar, R. | 2011
CO2
Editorial Board
| 2011