Recent advances on proteins of plant terminal membranes | [Progres recents sur les proteines des membranes terminales des plantes]
1999
Grignon, C. (Institut National de la Recherche Agronomique, Montpellier (France). Centre de Montpellier, Unite de Biochimie et Physiologie Moleculaire des Plantes)
Since the beginning of the 1990s, our knowledge of the protein equipment of plant membranes progresses at an accelerating pace, owing to the irruption of molecular biology tools and genetics strategies in plant biology. Map-based cloning strategies and exploration of EST databases rapidly enrich the catalog of cDNA or gene sequences expected to code for membrane proteins. The accumulation of 'putative' membrane proteins reinforces the need for structural, functional and physiological information. Indeed, ambiguities often exist concerning the association to a membrane, the membrane identity and the topology of the protein inserted in the membrane. The combination of directed mutagenesis and heterologous expression of plant genes in various systems and plant reverse genetics has opened the possibility to study molecular and physiological functions. This review will emphasize how these tools have been essential for the exciting recent discoveries on plant terminal membrane proteins. These discoveries concern a variety of transport systems for ions, organic solutes including auxin, water channels, a large collection of systems suspected to act as receptors of chemical signals, proteins thought to control vesicle trafficking and enzymatic systems
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