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Intercellular Diffusion of a Fluorescent Sucrose Analog via the Septal Junctions in a Filamentous Cyanobacterium

Opened Access Intercellular Diffusion of a Fluorescent Sucrose Analog via the Septal Junctions in a Filamentous Cyanobacterium

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Autor: Nürnberg, Dennis J.
Bornikoel, Jan
Nieves Morión, Mercedes
Krauß, Norbert
Herrero Moreno, Antonia
Flores Garcia, Enrique
Mullineaux,
Mariscal, Vicente
Fecha: 2015
Publicado en: mBio, 6 (2), e02109-e021014.
Tipo de documento: Artículo
Resumen: Many filamentous cyanobacteria produce specialized nitrogen-fixing cells called heterocysts, which are located at semiregular intervals along the filament with about 10 to 20 photosynthetic vegetative cells in between. Nitrogen fixation in these complex multicellular bacteria depends on metabolite exchange between the two cell types, with the heterocysts supplying combined-nitrogen compounds but dependent on the vegetative cells for photosynthetically produced carbon compounds. Here, we used a fluorescent tracer to probe intercellular metabolite exchange in the filamentous heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120. We show that esculin, a fluorescent sucrose analog, is incorporated by a sucrose import system into the cytoplasm of Anabaena cells. The cytoplasmic esculin is rapidly and reversibly exchanged across vegetative-vegetative and vegetative-heterocyst cell junctions. Our measurements reveal the kinetics of esculin exchange and also show that intercellular m...
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Cita: Nürnberg, D.J., Bornikoel, J., Nieves Morión, M., Krauß, N., Herrero Moreno, A., Flores Garcia, E.,...,Mariscal, V. (2015). Intercellular Diffusion of a Fluorescent Sucrose Analog via the Septal Junctions in a Filamentous Cyanobacterium. mBio, 6 (2), e02109-e021014.
Tamaño: 2.008Mb
Formato: PDF

URI: http://hdl.handle.net/11441/64150

DOI: 10.1128/mBio.02109-14

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