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Overexpression of SepJ alters septal morphology and heterocyst pattern regulated by diffusible signals in Anabaena

Opened Access Overexpression of SepJ alters septal morphology and heterocyst pattern regulated by diffusible signals in Anabaena

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Autor: Mariscal Romero, Vicente
Herrero Moreno, Antonia
Flores García, Enrique
Departamento: Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular
Fecha: 2016
Publicado en: Molecular Microbiology, 101 (6), 968-981.
Tipo de documento: Artículo
Resumen: Filamentous, N2 -fixing, heterocyst-forming cyanobacteria grow as chains of cells that are connected by septal junctions. In the model organism Anabaena sp. strain PCC 7120, the septal protein SepJ is required for filament integrity, normal intercellular molecular exchange, heterocyst differentiation, and diazotrophic growth. An Anabaena strain overexpressing SepJ made wider septa between vegetative cells than the wild type, which correlated with a more spread location of SepJ in the septa as observed with a SepJ-GFP fusion, and contained an increased number of nanopores, the septal peptidoglycan perforations that likely accommodate septal junctions. The septa between heterocysts and vegetative cells, which are narrow in wild-type Anabaena, were notably enlarged in the SepJ-overexpressing mutant. Intercellular molecular exchange tested with fluorescent tracers was increased for the SepJ-overexpressing strain specifically in the case of calcein transfer between vegetative cells and het...
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Cita: Mariscal Romero, V., Herrero Moreno, A. y Flores García, E. (2016). Overexpression of SepJ alters septal morphology and heterocyst pattern regulated by diffusible signals in Anabaena. Molecular Microbiology, 101 (6), 968-981.
Tamaño: 22.54Mb
Formato: PDF

URI: http://hdl.handle.net/11441/68543

DOI: 10.1111/mmi.13436.

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