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Título del libro: Handbook Of Microbial Metabolism Of Amino Acids
Título del capítulo: Rhizobial Amino Acid Metabolism: Polyamine Biosynthesis and Functions

Autores UNAM:
MICHAEL FREDERICK DUNN;
Autores externos:

Idioma:

Año de publicación:
2017
Palabras clave:

ESCHERICHIA-COLI K-12; LEGUME ROOT-NODULES; BIOFILM FORMATION; SINORHIZOBIUM-MELILOTI; PSEUDOMONAS-AERUGINOSA; AGROBACTERIUM-TUMEFACIENS; ORNITHINE-DECARBOXYLASE; NITROGEN-FIXATION; MEDICAGO-SATIVA; VIBRIO-CHOLERAE


Resumen:

Polyamines are ubiquitous polycationic molecules that have vital roles in many aspects of prokaryotic and eukaryotic cellular physiology. Most of the commonly occurring polyamines are synthesized from the basic L-amino acids arginine, ornithine and lysine. Polyamines produced by rhizobia, the nitrogen-fixing symbionts of leguminous plants, include the diamine putrescine and the triamines spermidine and homospermidine. The lucerne microsymbiont Sinorhizobium meliloti is able to synthesize an extended set of polyamines that includes norspermidine. Polyamines are implicated in a number of important processes in rhizobia, and this review summarizes their demonstrated or proposed roles in growth, motility, abiotic stress resistance, biofilm formation and symbiosis. The biosynthesis and catabolism of precursor amino acids and polyamines in rhizobia are discussed, along with a brief description of polyamine transport systems.


Entidades citadas de la UNAM: