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2018
- handle: 10670/1.of3ee7
- 0378-1844
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http://www.redalyc.org/revista.oa
Interciencia
Mots-clés
Multidisciplinarias (Ciencias Sociales) Cofactors Carbonic Anhydrase Alcohol Dehydrogenase Tryptophan Synthetase Superoxide Dismutase and AldolaseSujets proches
Vegetable kingdom Plantae Plant kingdom Vegetation Wildlife FloraCiter ce document
Jorge Castillo-González et al., « ZINC METALLOENZYMES IN PLANTS », Interciencia, ID : 10670/1.of3ee7
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Résumé
"Zinc is an essential plant micronutrient and soil availability is of great importance in many crops. In plants, zinc is neither oxidized nor reduced; instead, the significance of zinc stems from its physiochemical properties as a divalent cation. Many enzymes include zinc as a cofactor, like the alcohol dehydrogenase (EC 1.1.1.1), superoxide dismutase (EC 1.15.1.1), carbonic anhydrase (EC 4.2.1.1) and RNA polymerase (EC 2.7.7.6). In these cases, it is indirectly evident that zinc deficiency inhibits protein synthesis. Plants also require zinc for the synthesis of tryptophan, a key amino acid in the synthesis of the auxin indoleacetic acid. Therefore, zinc also operates in the control of plant development through its indirect action on auxins. Zinc deficiency affects the catalytic activity of all the above enzymes and, thus, the metabolic pathways in which they are involved. The aim of this paper is to analyze the function of Zn in some of metalloproteins involved in plant metabolism."