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Type: 
Journal
Description: 
Cells of the facultative photosynthetic bacterium Rhodobacter capsulatus exploit the simultaneous presence in the cultural medium of the toxic oxyanion tellurite (TeO32-) and the redox mediator lawsone (2-hydroxy-1,4-naphthoquinone) by reducing tellurite to metal Te0 nanoprecipitates (TeNPs) outside the cells. Here we have studied the mechanism by which lawsone interacts with metabolically active cells and analysed both structure and composition of the TeNPs collected from the growth medium of phototrophycally grown R. capsulatus. High Resolution Transmission Electron Microscopy (HR-TEM) images and Energy-Dispersive X-ray (EDX) microanalysis of TeNPs showed a central core of polycrystalline tellurium interspersed in an organic matrix with a predominant protein-based composition. The main proteins from Te0 nanostructures were identified by Liquid Chromatography tandem-Mass Spectrometry …
Publisher: 
Elsevier
Publication date: 
8 Jan 2020
Authors: 

Roberto Borghese, Marco Malferrari, Marco Brucale, Luca Ortolani, Martina Franchini, Stefania Rapino, Francesca Borsetti, Davide Zannoni

Biblio References: 
Pages: 107456
Origin: 
Bioelectrochemistry