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Regulation versus deregulation: an evolutionary perspective on the biochemical control of amino acids biosynthesis in plants

AuthorsEl-Azaz, Jorge; De la Torre, Fernando; Urbano, Alberto; Barcelona, Belén ; Ávila, Concepción; Cánovas, Francisco M.
Issue Date16-Jul-2019
PublisherSociedad Española de Bioquímica y Biología Molecular
CitationSEBBM19madrid - 42nd Congress of the Spanish Biochemical and Molecular Biology Society (2019)
Abstract(G12-06-OS) Amino acids are essential compounds for all the living organisms. Along with their central role as constituents of proteins, in plants they also act as precursors of a myriad of compounds and metabolites with critical functions in development, signaling, and responses to the environment, concerning many dierent aspects of plant biology. Nevertheless, the main bulk of our knowledge about the regulation of amino acids metabolism in plants stills rely on studies performed in bacteria, and many details remain missing or not well understood. In this communication, we provide new insights into the biochemical regulation of the biosynthesis of two dierent amino acids in plants: arginine and phenylalanine. Both are good examples of how the role of these compounds is not restricted to the biosynthesis of proteins. Hence, arginine is, thanks to its high nitrogen/carbon ratio, one of the preferred forms for the storage of organic nitrogen. This is particularly relevant in the formation of the seed, one of the main reasons of the undisputable, adaptive success of the land plants. On the other hand, the aromatic amino acid phenylalanine is the main precursor for the biosynthesis of phenylpropanoids, a huge array of phenolic compounds that act as pigments, avors, protectant agents against UV radiation and ROS, structural components of the cell wall, etc., essential for surviving in the land environment. Our #12;ndings contribute to gain understanding about how biochemical regulation, mainly through allosteric mechanisms in response to dierent metabolites, helps to modulate the biosynthesis of these amino acids, maintaining their homeostasis. We also discuss how [...]
DescriptionTrabajo presentado en el SEBBM19madrid - 42nd Congress of the Spanish Biochemical and Molecular Biology Society, celebrado en Madrid (España) del 16 al 19 de julio de 2019.
Appears in Collections:(IBV) Comunicaciones congresos
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