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Bhati KK, Luong AM, Dittrich-Domergue F, D'Andrea S, Moreau P, Batoko H. Possible crosstalk between the Arabidopsis TSPO-related protein and the transcription factor WRINKLED1. Biochimie 2024:S0300-9084(24)00105-6. [PMID: 38734125 DOI: 10.1016/j.biochi.2024.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/20/2024] [Accepted: 05/06/2024] [Indexed: 05/13/2024]
Abstract
This study uncovers a regulatory interplay between WRINKLED1 (WRI1), a master transcription factor for glycolysis and lipid biosynthesis, and Translocator Protein (TSPO) expression in Arabidopsis thaliana seeds. We identified potential WRI1-responsive elements upstream of AtTSPO through bioinformatics, suggesting WRI1's involvement in regulating TSPO expression. Our analyses showed a significant reduction in AtTSPO levels in wri1 mutant seeds compared to wild type, establishing a functional link between WRI1 and TSPO. This connection extends to the coordination of seed development and lipid metabolism, with both WRI1 and AtTSPO levels decreasing post-imbibition, indicating their roles in seed physiology. Further investigations into TSPO's impact on fatty acid synthesis revealed that TSPO misexpression alters WRI1's post-translational modifications and significantly enhances seed oil content. Additionally, we noted a decrease in key reserve proteins, including 12S globulin and oleosin 1, in seeds with TSPO misexpression, suggesting a novel energy storage strategy in these lines. Our findings reveal a sophisticated network involving WRI1 and AtTSPO, highlighting their crucial contributions to seed development, lipid metabolism, and the modulation of energy storage mechanisms in Arabidopsis.
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Affiliation(s)
- Kaushal Kumar Bhati
- Louvain Institute of Biomolecular Science and Technology (LIBST), University of Louvain, Croix du Sud 4-5, L7.07.14, 1348 Louvain-la-Neuve, Belgium
| | - Ai My Luong
- Louvain Institute of Biomolecular Science and Technology (LIBST), University of Louvain, Croix du Sud 4-5, L7.07.14, 1348 Louvain-la-Neuve, Belgium
| | - Franziska Dittrich-Domergue
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Sabine D'Andrea
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - Patrick Moreau
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Henri Batoko
- Louvain Institute of Biomolecular Science and Technology (LIBST), University of Louvain, Croix du Sud 4-5, L7.07.14, 1348 Louvain-la-Neuve, Belgium.
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Wattelet-Boyer V, Le Guédard M, Dittrich-Domergue F, Maneta-Peyret L, Kriechbaumer V, Boutté Y, Bessoule JJ, Moreau P. Lysophosphatidic acid acyltransferases: a link with intracellular protein trafficking in Arabidopsis root cells? J Exp Bot 2022; 73:1327-1343. [PMID: 34982825 DOI: 10.1093/jxb/erab504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 11/16/2021] [Indexed: 06/14/2023]
Abstract
Phosphatidic acid (PA) and lysophosphatidic acid acyltransferases (LPAATs) might be critical for the secretory pathway. Four extra-plastidial LPAATs (LPAAT2, 3, 4, and 5) were identified in Arabidopsis thaliana. These AtLPAATs display a specific enzymatic activity converting lysophosphatidic acid to PA and are located in the endomembrane system. We investigate a putative role for AtLPAATs 3, 4, and 5 in the secretory pathway of root cells through genetical (knockout mutants), biochemical (activity inhibitor, lipid analyses), and imaging (live and immuno-confocal microscopy) approaches. Treating a lpaat4;lpaat5 double mutant with the LPAAT inhibitor CI976 produced a significant decrease in primary root growth. The trafficking of the auxin transporter PIN2 was disturbed in this lpaat4;lpaat5 double mutant treated with CI976, whereas trafficking of H+-ATPases was unaffected. The lpaat4;lpaat5 double mutant is sensitive to salt stress, and the trafficking of the aquaporin PIP2;7 to the plasma membrane in the lpaat4;lpaat5 double mutant treated with CI976 was reduced. We measured the amounts of neo-synthesized PA in roots, and found a decrease in PA only in the lpaat4;lpaat5 double mutant treated with CI976, suggesting that the protein trafficking impairment was due to a critical PA concentration threshold.
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Affiliation(s)
- Valérie Wattelet-Boyer
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Marina Le Guédard
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
- LEB Aquitaine Transfert-ADERA, INRA Bordeaux Aquitaine, 33140 Villenave d'Ornon, France
| | - Franziska Dittrich-Domergue
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Lilly Maneta-Peyret
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Verena Kriechbaumer
- Plant Cell Biology, Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, UK
| | - Yohann Boutté
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
| | - Jean-Jacques Bessoule
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
- LEB Aquitaine Transfert-ADERA, INRA Bordeaux Aquitaine, 33140 Villenave d'Ornon, France
| | - Patrick Moreau
- CNRS, University of Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33140 Villenave d'Ornon, France
- Bordeaux Imaging Center, UMS 3420 CNRS, US004 INSERM, University of Bordeaux, 33000 Bordeaux, France
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Millerioux Y, Mazet M, Bouyssou G, Allmann S, Kiema TR, Bertiaux E, Fouillen L, Thapa C, Biran M, Plazolles N, Dittrich-Domergue F, Crouzols A, Wierenga RK, Rotureau B, Moreau P, Bringaud F. De novo biosynthesis of sterols and fatty acids in the Trypanosoma brucei procyclic form: Carbon source preferences and metabolic flux redistributions. PLoS Pathog 2018; 14:e1007116. [PMID: 29813135 PMCID: PMC5993337 DOI: 10.1371/journal.ppat.1007116] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 06/08/2018] [Accepted: 05/22/2018] [Indexed: 12/27/2022] Open
Abstract
De novo biosynthesis of lipids is essential for Trypanosoma brucei, a protist responsible for the sleeping sickness. Here, we demonstrate that the ketogenic carbon sources, threonine, acetate and glucose, are precursors for both fatty acid and sterol synthesis, while leucine only contributes to sterol production in the tsetse fly midgut stage of the parasite. Degradation of these carbon sources into lipids was investigated using a combination of reverse genetics and analysis of radio-labelled precursors incorporation into lipids. For instance, (i) deletion of the gene encoding isovaleryl-CoA dehydrogenase, involved in the leucine degradation pathway, abolished leucine incorporation into sterols, and (ii) RNAi-mediated down-regulation of the SCP2-thiolase gene expression abolished incorporation of the three ketogenic carbon sources into sterols. The SCP2-thiolase is part of a unidirectional two-step bridge between the fatty acid precursor, acetyl-CoA, and the precursor of the mevalonate pathway leading to sterol biosynthesis, 3-hydroxy-3-methylglutaryl-CoA. Metabolic flux through this bridge is increased either in the isovaleryl-CoA dehydrogenase null mutant or when the degradation of the ketogenic carbon sources is affected. We also observed a preference for fatty acids synthesis from ketogenic carbon sources, since blocking acetyl-CoA production from both glucose and threonine abolished acetate incorporation into sterols, while incorporation of acetate into fatty acids was increased. Interestingly, the growth of the isovaleryl-CoA dehydrogenase null mutant, but not that of the parental cells, is interrupted in the absence of ketogenic carbon sources, including lipids, which demonstrates the essential role of the mevalonate pathway. We concluded that procyclic trypanosomes have a strong preference for fatty acid versus sterol biosynthesis from ketogenic carbon sources, and as a consequence, that leucine is likely to be the main source, if not the only one, used by trypanosomes in the infected insect vector digestive tract to feed the mevalonate pathway.
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Affiliation(s)
- Yoann Millerioux
- Laboratoire de Microbiologie Fondamentale et Pathogénicité (MFP), Université de Bordeaux, CNRS UMR-5234, Bordeaux, France
- Centre de Résonance Magnétique des Systèmes Biologiques (RMSB), Université de Bordeaux, CNRS UMR-5536, Bordeaux, France
| | - Muriel Mazet
- Laboratoire de Microbiologie Fondamentale et Pathogénicité (MFP), Université de Bordeaux, CNRS UMR-5234, Bordeaux, France
- Centre de Résonance Magnétique des Systèmes Biologiques (RMSB), Université de Bordeaux, CNRS UMR-5536, Bordeaux, France
| | - Guillaume Bouyssou
- Membrane Biogenesis Laboratory, CNRS-University of Bordeaux, UMR-5200, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
| | - Stefan Allmann
- Laboratoire de Microbiologie Fondamentale et Pathogénicité (MFP), Université de Bordeaux, CNRS UMR-5234, Bordeaux, France
- Centre de Résonance Magnétique des Systèmes Biologiques (RMSB), Université de Bordeaux, CNRS UMR-5536, Bordeaux, France
| | - Tiila-Riikka Kiema
- Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Eloïse Bertiaux
- Trypanosome Transmission Group, Trypanosome Cell Biology Unit, Department of Parasites and Insect Vectors, INSERM U1201, Institut Pasteur, Paris, France
| | - Laetitia Fouillen
- Membrane Biogenesis Laboratory, CNRS-University of Bordeaux, UMR-5200, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
- Metabolome Facility of Bordeaux, Functional Genomics Center, Villenave d'Ornon
| | - Chandan Thapa
- Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Marc Biran
- Centre de Résonance Magnétique des Systèmes Biologiques (RMSB), Université de Bordeaux, CNRS UMR-5536, Bordeaux, France
| | - Nicolas Plazolles
- Laboratoire de Microbiologie Fondamentale et Pathogénicité (MFP), Université de Bordeaux, CNRS UMR-5234, Bordeaux, France
| | - Franziska Dittrich-Domergue
- Membrane Biogenesis Laboratory, CNRS-University of Bordeaux, UMR-5200, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
| | - Aline Crouzols
- Trypanosome Transmission Group, Trypanosome Cell Biology Unit, Department of Parasites and Insect Vectors, INSERM U1201, Institut Pasteur, Paris, France
| | - Rik K. Wierenga
- Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Brice Rotureau
- Trypanosome Transmission Group, Trypanosome Cell Biology Unit, Department of Parasites and Insect Vectors, INSERM U1201, Institut Pasteur, Paris, France
| | - Patrick Moreau
- Membrane Biogenesis Laboratory, CNRS-University of Bordeaux, UMR-5200, INRA Bordeaux Aquitaine, Villenave d'Ornon, France
| | - Frédéric Bringaud
- Laboratoire de Microbiologie Fondamentale et Pathogénicité (MFP), Université de Bordeaux, CNRS UMR-5234, Bordeaux, France
- Centre de Résonance Magnétique des Systèmes Biologiques (RMSB), Université de Bordeaux, CNRS UMR-5536, Bordeaux, France
- * E-mail:
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Miklaszewska M, Dittrich-Domergue F, Banaś A, Domergue F. Wax synthase MhWS2 from Marinobacter hydrocarbonoclasticus: substrate specificity and biotechnological potential for wax ester production. Appl Microbiol Biotechnol 2018; 102:4063-4074. [DOI: 10.1007/s00253-018-8878-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 02/02/2018] [Accepted: 02/12/2018] [Indexed: 10/17/2022]
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Dittrich-Domergue F, Joubès J, Moreau P, Lessire R, Stymne S, Domergue F. The bifunctional protein TtFARAT from Tetrahymena thermophila catalyzes the formation of both precursors required to initiate ether lipid biosynthesis. J Biol Chem 2014; 289:21984-94. [PMID: 24917677 PMCID: PMC4139215 DOI: 10.1074/jbc.m114.579318] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/03/2014] [Indexed: 11/06/2022] Open
Abstract
The biosynthesis of ether lipids and wax esters requires as precursors fatty alcohols, which are synthesized by fatty acyl reductases (FARs). The presence of ether glycerolipids as well as branched wax esters has been reported in several free-living ciliate protozoa. In the genome of Tetrahymena thermophila, the only ORF sharing similarities with FARs is fused to an acyltransferase-like domain, whereas, in most other organisms, FARs are monofunctional proteins of similar size and domain structure. Here, we used heterologous expression in plant and yeast to functionally characterize the activities catalyzed by this protozoan protein. Transient expression in tobacco epidermis of a truncated form fused to the green fluorescence protein followed by confocal microscopy analysis suggested peroxisomal localization. In vivo approaches conducted in yeast indicated that the N-terminal FAR-like domain produced both 16:0 and 18:0 fatty alcohols, whereas the C-terminal acyltransferase-like domain was able to rescue the lethal phenotype of the yeast double mutant gat1Δ gat2Δ. Using in vitro approaches, we further demonstrated that this domain is a dihydroxyacetone phosphate acyltransferase that uses preferentially 16:0-coenzyme A as an acyl donor. Finally, coexpression in yeast with the alkyl-dihydroxyacetone phosphate synthase from T. thermophila resulted the detection of various glycerolipids with an ether bond, indicating reconstitution of the ether lipid biosynthetic pathway. Together, these results demonstrate that this FAR-like protein is peroxisomal and bifunctional, providing both substrates required by alkyl-dihydroxyacetone phosphate synthase to initiate ether lipid biosynthesis.
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Affiliation(s)
- Franziska Dittrich-Domergue
- From the Université de Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, the Centre National de la Recherche Scientifique, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, and
| | - Jérôme Joubès
- From the Université de Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, the Centre National de la Recherche Scientifique, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, and
| | - Patrick Moreau
- From the Université de Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, the Centre National de la Recherche Scientifique, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, and
| | - René Lessire
- From the Université de Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, the Centre National de la Recherche Scientifique, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, and
| | - Sten Stymne
- the Department of Plant Breeding, Swedish University of Agricultural Sciences, P.O.B. 101, 23053 Alnarp, Sweden
| | - Frédéric Domergue
- From the Université de Bordeaux, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, the Centre National de la Recherche Scientifique, Laboratoire de Biogenèse Membranaire, UMR 5200, 33000 Bordeaux, France, and
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Vishwanath SJ, Kosma DK, Pulsifer IP, Scandola S, Pascal S, Joubès J, Dittrich-Domergue F, Lessire R, Rowland O, Domergue F. Suberin-associated fatty alcohols in Arabidopsis: distributions in roots and contributions to seed coat barrier properties. Plant Physiol 2013; 163:1118-32. [PMID: 24019425 PMCID: PMC3813638 DOI: 10.1104/pp.113.224410] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 09/04/2013] [Indexed: 05/18/2023]
Abstract
Suberin is found in a variety of tissues, such as root endoderms and periderms, storage tuber periderms, tree cork layer, and seed coats. It acts as a hydrophobic barrier to control the movement of water, gases, and solutes as well as an antimicrobial barrier. Suberin consists of polymerized phenolics, glycerol, and a variety of fatty acid derivatives, including primary fatty alcohols. We have conducted an in-depth analysis of the distribution of the C18:0 to C22:0 fatty alcohols in Arabidopsis (Arabidopsis thaliana) roots and found that only 20% are part of the root suberin polymer, together representing about 5% of its aliphatic monomer composition, while the remaining 80% are found in the nonpolymeric (soluble) fraction. Down-regulation of Arabidopsis FATTY ACYL REDUCTASE1 (FAR1), FAR4, and FAR5, which collectively produce the fatty alcohols found in suberin, reduced their levels by 70% to 80% in (1) the polymeric and nonpolymeric fractions from roots of tissue culture-grown plants, (2) the suberin-associated root waxes from 7-week-old soil-grown plants, and (3) the seed coat suberin polymer. By contrast, the other main monomers of suberin were not altered, indicating that reduced levels of fatty alcohols did not influence the suberin polymerization process. Nevertheless, the 75% reduction in total fatty alcohol and diol loads in the seed coat resulted in increased permeability to tetrazolium salts and a higher sensitivity to abscisic acid. These results suggest that fatty alcohols and diols play an important role in determining the functional properties of the seed coat suberin barrier.
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Chacón MG, Fournier AE, Tran F, Dittrich-Domergue F, Pulsifer IP, Domergue F, Rowland O. Identification of amino acids conferring chain length substrate specificities on fatty alcohol-forming reductases FAR5 and FAR8 from Arabidopsis thaliana. J Biol Chem 2013; 288:30345-30355. [PMID: 24005667 DOI: 10.1074/jbc.m113.499715] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Fatty alcohols play a variety of biological roles in all kingdoms of life. Fatty acyl reductase (FAR) enzymes catalyze the reduction of fatty acyl-coenzyme A (CoA) or fatty acyl-acyl carrier protein substrates to primary fatty alcohols. FAR enzymes have distinct substrate specificities with regard to chain length and degree of saturation. FAR5 (At3g44550) and FAR8 (At3g44560) from Arabidopsis thaliana are 85% identical at the amino acid level and are of equal length, but they possess distinct specificities for 18:0 or 16:0 acyl chain length, respectively. We used Saccharomyces cerevisiae as a heterologous expression system to assess FAR substrate specificity determinants. We identified individual amino acids that affect protein levels or 16:0-CoA versus 18:0-CoA specificity by expressing in yeast FAR5 and FAR8 domain-swap chimeras and site-specific mutants. We found that a threonine at position 347 and a serine at position 363 were important for high FAR5 and FAR8 protein accumulation in yeast and thus are likely important for protein folding and stability. Amino acids at positions 355 and 377 were important for dictating 16:0-CoA versus 18:0-CoA chain length specificity. Simultaneously converting alanine 355 and valine 377 of FAR5 to the corresponding FAR8 residues, leucine and methionine, respectively, almost fully converted FAR5 specificity from 18:0-CoA to 16:0-CoA. The reciprocal amino acid conversions, L355A and M377V, made in the active FAR8-S363P mutant background converted its specificity from 16:0-CoA to 18:0-CoA. This study is an important advancement in the engineering of highly active FAR proteins with desired specificities for the production of fatty alcohols with industrial value.
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Affiliation(s)
- Micaëla G Chacón
- From the Institute of Biochemistry, Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada and
| | - Ashley E Fournier
- From the Institute of Biochemistry, Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada and
| | - Frances Tran
- From the Institute of Biochemistry, Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada and
| | - Franziska Dittrich-Domergue
- the Laboratoire de Biogenèse Membranaire, Université Bordeaux Ségalen, CNRS-UMR 5200, Bâtiment A3-INRA Bordeaux Aquitaine BP81, 71 Avenue Edouard Bourlaux, 33883 Villenave D'Ornon Cedex, France
| | - Ian P Pulsifer
- From the Institute of Biochemistry, Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada and
| | - Frédéric Domergue
- the Laboratoire de Biogenèse Membranaire, Université Bordeaux Ségalen, CNRS-UMR 5200, Bâtiment A3-INRA Bordeaux Aquitaine BP81, 71 Avenue Edouard Bourlaux, 33883 Villenave D'Ornon Cedex, France
| | - Owen Rowland
- From the Institute of Biochemistry, Department of Biology, Carleton University, Ottawa, Ontario K1S 5B6, Canada and.
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