Abstract
Rhamnogalacturonan II (RG-II) is a structurally complex cell wall pectic polysaccharide. Despite its complexity, both the structure of RG-II and its ability to dimerise via a borate diester are conserved in vascular plants suggesting that RG-II has a fundamental role in primary cell wall organisation and function. The selection and analysis of new mutants affected in RG-II formation represents a promising strategy to unravel these functions and to identify genes encoding enzymes involved in RG-II biosynthesis. In this paper, a novel fingerprinting strategy is described for the screening of RG-II mutants based on the mild acid hydrolysis of RG-II coupled to the analysis of the resulting fragments by mass spectrometry. This methodology was developed using RG-II fractions isolated from citrus pectins and then validated for RG-II isolated from the Arabidopsis mur1 mutant and irx10 irx10-like double mutant.
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Abbreviations
- Api:
-
d-Apiose
- AceA:
-
l-Aceric acid
- Dha:
-
2-Keto-3-deoxy-d-lyxo-heptulosaric acid
- DMB:
-
1,2 Diamino-4,5-methylene dioxybenzene
- Kdo:
-
2-Keto-3-deoxy-d-manno-octulosonic acid
- ESI-MS:
-
Electrospray ionisation mass spectrometry
- EPG:
-
Endo-α(1,4)-polygalacturonase
- MALDI-TOF:
-
Matrix-assisted laser desorption ionisation-time of flight
- OLIMP:
-
Oligosaccharide mass profiling method
- 2-OMeFuc:
-
2-O-Methyl l-fucose
- 2-OMeXyl:
-
2-O-Methyl d-xylose
- RG-II:
-
Rhamnogalacturonan II
- TFA:
-
Trifluoroacetic acid
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Acknowledgments
The Nottingham Arabidopsis Stock Center and Gregory Mouille, INRA Versailles, France are acknowledged for providing seeds for the Arabidopsis insertion lines and mutants. The authors thank Muriel Bardor, EA4358 University of Rouen, France for MALDI TOF analyses. This research was supported in France by the CNRS, the Région Haute-Normandie and the University of Rouen. Research at UPSC Sweden (A.M., A.-M.W.) was supported by the Swedish Foundation for Scientific Research (SSF) and Formas.
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Séveno, M., Voxeur, A., Rihouey, C. et al. Structural characterisation of the pectic polysaccharide rhamnogalacturonan II using an acidic fingerprinting methodology. Planta 230, 947–957 (2009). https://doi.org/10.1007/s00425-009-0996-1
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DOI: https://doi.org/10.1007/s00425-009-0996-1