Plastidic aspartate aminotransferases and the biosynthesis of essential amino acids in plants.
J Exp Bot
; 65(19): 5527-34, 2014 Oct.
Article
en En
| MEDLINE
| ID: mdl-24902885
ABSTRACT
In the chloroplasts and in non-green plastids of plants, aspartate is the precursor for the biosynthesis of different amino acids and derived metabolites that play distinct and important roles in plant growth, reproduction, development or defence. Aspartate biosynthesis is mediated by the enzyme aspartate aminotransferase (EC 2.6.1.1), which catalyses the reversible transamination between glutamate and oxaloacetate to generate aspartate and 2-oxoglutarate. Plastids contain two aspartate aminotransferases a eukaryotic-type and a prokaryotic-type bifunctional enzyme displaying aspartate and prephenate aminotransferase activities. A general overview of the biochemistry, regulation, functional significance, and phylogenetic origin of both enzymes is presented. The roles of these plastidic aminotransferases in the biosynthesis of essential amino acids are discussed.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Plantas
/
Aspartato Aminotransferasas
/
Aminoácidos Esenciales
Idioma:
En
Revista:
J Exp Bot
Asunto de la revista:
BOTANICA
Año:
2014
Tipo del documento:
Article
País de afiliación:
España