The role of proteins of the outer membrane of Shewanella oneidensis MR-1 in the formation and stabilization of silver sulfide nanoparticles

Silver sulfide nanoparticles stable in aqueous solutions were obtained in presence of the cells of the bacterium Shewanella oneidensis MR-1 in aqueous solution containing an equimolar mixture of AgNO 3 and Na 2 S 2 O 3 . Proteins absorbed on the surface of Ag 2 S nanoparticles were identified for th...

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Bibliographic Details
Published in:Applied biochemistry and microbiology 2016-12, Vol.52 (8), p.769-775
Main Authors: Voeikova, T. A., Shebanova, A. S., Ivanov, Yu. D., Kaysheva, A. L., Novikova, L. M., Zhuravliova, O. A., Shumyantseva, V. V., Shaitan, K. V., Kirpichnikov, M. P., Debabov, V. G.
Format: Article
Language:English
Subjects:
Biochemistry
Biology
Biomedical and Life Sciences
Gene Engineering
Life Sciences
Medical Microbiology
Membranes
Microbiology
Nanoparticles
Producers
Proteins
Selection
Shewanella oneidensis
Silver
Sulfide compounds
Sulfides
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Summary:Silver sulfide nanoparticles stable in aqueous solutions were obtained in presence of the cells of the bacterium Shewanella oneidensis MR-1 in aqueous solution containing an equimolar mixture of AgNO 3 and Na 2 S 2 O 3 . Proteins absorbed on the surface of Ag 2 S nanoparticles were identified for the first time by MALDITOF/TOF. Among these proteins, multiheme cytochromes MtrC and OmcA, as well as the MtrB membrane porin, which forms a complex on the outer cell membrane, were detected. It was shown that an insoluble precipitate consisting of agglomerated Ag 2 S nanoparticles with a wide size distribution was formed in the absence of the cells. The role of the detected proteins in the mechanism of the formation and stabilization of the Ag 2 S nanoparticles in the studied system is discussed.
ISSN:0003-6838
1608-3024
DOI:10.1134/S0003683816080081