Repositorio de producción científica de la Universidad de Sevilla

Heterocyst development and diazotrophic metabolism in terminal respiratory oxidase mutants of the cyanobacterium Anabaena sp. strain PCC 7120

Opened Access Heterocyst development and diazotrophic metabolism in terminal respiratory oxidase mutants of the cyanobacterium Anabaena sp. strain PCC 7120

Citas

buscar en

Estadísticas
Icon
Exportar a
Autor: Valladares Ruiz, Ana
Maldener, Iris
Muro Pastor, Alicia María
Flores García, Enrique
Herrero Moreno, Antonia
Departamento: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Fecha: 2007
Publicado en: Journal of Bacteriology, 189 (12), 4425-4430.
Tipo de documento: Artículo
Resumen: Heterocyst development was analyzed in mutants of the heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120 bearing inactivated cox2 and/or cox3 genes, encoding heterocyst-specific terminal respiratory oxidases. At the morphological level, the cox2 cox3 double mutant (strain CSAV141) was impaired in membrane reorganization involving the so-called honeycomb system that in the wild-type strain is largely or exclusively devoted to respiration, accumulated glycogen granules at conspicuously higher levels than the wild type (in both vegetative cells and heterocysts), and showed a delay in carboxysome degradation upon combined nitrogen deprivation. Consistently, chemical analysis confirmed higher accumulation of glycogen in strain CSAV141 than in the wild type. No impairment was observed in the formation of the glycolipid or polysaccharide layers of the heterocyst envelope, consistent with the chemical detection of heterocyst-specific glycolipids, or in the expression of the hetero...
[Ver más]
Cita: Valladares Ruiz, A., Maldener, I., Muro Pastor, A.M., Flores García, E. y Herrero, A. (2007). Heterocyst development and diazotrophic metabolism in terminal respiratory oxidase mutants of the cyanobacterium Anabaena sp. strain PCC 7120. Journal of Bacteriology, 189 (12), 4425-4430.
Tamaño: 235.2Kb
Formato: PDF

URI: http://hdl.handle.net/11441/62952

DOI: 10.1128/JB.00220-07

Ver versión del editor

Mostrar el registro completo del ítem


Esta obra está bajo una Licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internacional

Este registro aparece en las siguientes colecciones