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Paterlini A, Sechet J, Immel F, Grison MS, Pilard S, Pelloux J, Mouille G, Bayer EM, Voxeur A. Enzymatic fingerprinting reveals specific xyloglucan and pectin signatures in the cell wall purified with primary plasmodesmata. Front Plant Sci 2022; 13:1020506. [PMID: 36388604 PMCID: PMC9640925 DOI: 10.3389/fpls.2022.1020506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
Plasmodesmata (PD) pores connect neighbouring plant cells and enable direct transport across the cell wall. Understanding the molecular composition of these structures is essential to address their formation and later dynamic regulation. Here we provide a biochemical characterisation of the cell wall co-purified with primary PD of Arabidopsis thaliana cell cultures. To achieve this result we combined subcellular fractionation, polysaccharide analyses and enzymatic fingerprinting approaches. Relative to the rest of the cell wall, specific patterns were observed in the PD fraction. Most xyloglucans, although possibly not abundant as a group, were fucosylated. Homogalacturonans displayed short methylated stretches while rhamnogalacturonan I species were remarkably abundant. Full rhamnogalacturonan II forms, highly methyl-acetylated, were also present. We additionally showed that these domains, compared to the broad wall, are less affected by wall modifying activities during a time interval of days. Overall, the protocol and the data presented here open new opportunities for the study of wall polysaccharides associated with PD.
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Affiliation(s)
- A. Paterlini
- Laboratoire de Biogenèse Membranaire, Unité mixte de recherche (UMR5200), Université Bordeaux, Centre national de la recherche scientifique (CNRS), Villenave d’Ornon, France
| | - J. Sechet
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), AgroParisTech, Versailles, France
| | - F. Immel
- Laboratoire de Biogenèse Membranaire, Unité mixte de recherche (UMR5200), Université Bordeaux, Centre national de la recherche scientifique (CNRS), Villenave d’Ornon, France
| | - M. S. Grison
- Laboratoire de Biogenèse Membranaire, Unité mixte de recherche (UMR5200), Université Bordeaux, Centre national de la recherche scientifique (CNRS), Villenave d’Ornon, France
| | - S. Pilard
- Plateforme Analytique, Université de Picardie, Amiens, France
| | - J. Pelloux
- UMRT (Unité Mixte de Recherche Transfrontaliére) INRAE (Institut National de recherche pour l'Agriculture, l'alimentation et l'Environnement) 1158 BioEcoAgro – BIOPI Biologie des Plantes et Innovation, Université de Picardie, Amiens, France
| | - G. Mouille
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), AgroParisTech, Versailles, France
| | - E. M. Bayer
- Laboratoire de Biogenèse Membranaire, Unité mixte de recherche (UMR5200), Université Bordeaux, Centre national de la recherche scientifique (CNRS), Villenave d’Ornon, France
| | - A. Voxeur
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, Institut National de Recherche pour l'Agriculture, l'alimentation et l'Environnement (INRAE), AgroParisTech, Versailles, France
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Barabé F, Gil L, Celton M, Bergeron A, Lamontagne V, Roques É, Lagacé K, Forest A, Johnson R, Pécheux L, Simard J, Pelloux J, Bellemare-Pelletier A, Gagnon E, Hébert J, Cellot S, Wilhelm BT. Modeling human MLL-AF9 translocated acute myeloid leukemia from single donors reveals RET as a potential therapeutic target. Leukemia 2016; 31:1166-1176. [DOI: 10.1038/leu.2016.302] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/16/2016] [Accepted: 09/26/2016] [Indexed: 12/19/2022]
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Nyvall P, Pelloux J, Davies HV, Pedersén M, Viola R. Purification and characterisation of a novel starch synthase selective for uridine 5'-diphosphate glucose from the red alga Gracilaria tenuistipitata. Planta 1999; 209:143-152. [PMID: 10467041 DOI: 10.1007/s004250050616] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Red algae (Rhodophyceae) are photosynthetic eukaryotes that accumulate starch granules in the cytosol. Starch synthase activity in crude extracts of Gracilaria tenuistipitata Chang et Xia was almost 9-fold higher with UDP[U-14C]glucose than with ADP[U-14C]glucose. The activity with UDP[U-14C]glucose was sensitive to proteolytic and oxidative inhibition during extraction whilst the activity with ADP[U-14C]glucose appeared unaffected. This indicates the presence of separate starch synthases with different substrate specificities in G. tenuistipitata. The UDPglucose: starch synthase was purified and characterised. The enzyme appears to be a homotetramer with a native M(r) of 580 kDa and displays kinetic properties similar to other alpha-glucan synthases such as stimulation by citrate, product (UDP) inhibition and broad primer specificity. We propose that this enzyme is involved in cytosolic starch synthesis in red algae and thus is the first starch synthase described that utilises UDPglucose in vivo. The biochemical implications of the different compartmentalisation of starch synthesis in red algae and green algae/plants are also discussed.
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Affiliation(s)
- P Nyvall
- Department of Botany, Stockholm University, S-106 91 Stockholm, Sweden
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