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Amino acid transport systems required for diazotrophic growth in the cyanobacterium Anabaena sp. strain PCC 7120

Opened Access Amino acid transport systems required for diazotrophic growth in the cyanobacterium Anabaena sp. strain PCC 7120
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Autor: Montesinos, María Luz
Herrero Moreno, Antonia
Flores García, Enrique
Departamento: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Fecha: 1995
Publicado en: Journal of Bacteriology, 177 (11), 3150-3157.
Tipo de documento: Artículo
Resumen: Uptake of 16 amino acids by the filamentous, heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120 was characterized with regard to kinetic parameters of transport, intracellular accumulation of the transported amino acids, and sensitivity of the transport process to energy metabolism inhibitors. Mutants resistant to certain toxic analogs of some amino acids were isolated that were impaired in amino acid transport. Results obtained in this study, together with those reported previously (A. Herrero and E. Flores, J. Biol. Chem. 265:3931-3935, 1990), suggest that there are at least five amino acid transport systems in strain PCC 7120: one high- affinity, active system for basic amino acids; one low-affinity, passive system for basic amino acids; two high-affinity, active systems with overlapping, but not identical, specificities for neutral amino acids; and one putative system for acidic amino acids. Some of the amino acid transport mutants were impaired in diazotrophic growth....
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Cita: Montesinos, M.L., Herrero, A. y Flores García, E. (1995). Amino acid transport systems required for diazotrophic growth in the cyanobacterium Anabaena sp. strain PCC 7120. Journal of Bacteriology, 177 (11), 3150-3157.
Tamaño: 231.1Kb
Formato: PDF

URI: http://hdl.handle.net/11441/63107

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