Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/99960
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dc.contributor.authorKjelleberg, Staffanen
dc.contributor.authorCao, Binen
dc.contributor.authorNg, Chun Kiaten
dc.contributor.authorSivakumar, Krishnakumaren
dc.contributor.authorLiu, Xinen
dc.contributor.authorMadhaiyan, Munusamyen
dc.contributor.authorJi, Lianghuien
dc.contributor.authorYang, Liangen
dc.contributor.authorTang, Chuyang Y.en
dc.contributor.authorSong, Haoen
dc.date.accessioned2013-11-05T01:17:49Zen
dc.date.accessioned2019-12-06T20:14:04Z-
dc.date.available2013-11-05T01:17:49Zen
dc.date.available2019-12-06T20:14:04Z-
dc.date.copyright2013en
dc.date.issued2013en
dc.identifier.citationNg, C. K., Sivakumar, K., Liu, X., Madhaiyan, M., Ji, L., Yang, L., Tang, C., Song, H., Kjelleberg, S., & Cao, B. (2013). Influence of outer membrane c -type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis . Biotechnology and Bioengineering, 110(7), 1831-1837.en
dc.identifier.urihttps://hdl.handle.net/10356/99960-
dc.description.abstractThe metal-reducing bacterium Shewanella oneidensis is capable of reducing various metal(loid)s and produces nanoparticles (NPs) extracellularly, in which outer membrane c-type cytochromes (OMCs) have been suggested to play important roles. The objective of this study was to investigate the influence of the OMCs, that is, MtrC and OmcA, on the size and activity of the extracellular silver NPs (AgNPs) and silver sulfide NPs (Ag2S NPs) produced by S. oneidensis MR-1. We found that (i) the lack of OMCs on S. oneidensis cell surface decreased the particle size of the extracellular biogenic AgNPs and Ag2S NPs; (ii) the biogenic AgNPs from the mutant lacking OMCs showed higher antibacterial activity; and (iii) the biogenic Ag2S NPs from the mutant lacking OMCs exhibited higher catalytic activity in methylviologen reduction. The results suggest that it may be possible to control particle size and activity of the extracellular biogenic NPs via controlled expression of the genes encoding surface proteins. In addition, we also reveal that in extracellular biosynthesis of NPs the usually neglected non-cell-associated NPs could have high catalytic activity, highlighting the need of novel methods that can efficiently retain extracellular NPs in the biosynthesis processes.en
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.language.isoenen
dc.relation.ispartofseriesBiotechnology and bioengineeringen
dc.rights© 2013 Wiley Periodicals, Inc.en
dc.subjectDRNTU::Engineering::Chemical engineering::Biotechnologyen
dc.titleInfluence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensisen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen
dc.contributor.researchSingapore Centre for Environmental Life Sciences Engineeringen
dc.identifier.doi10.1002/bit.24856en
item.fulltextNo Fulltext-
item.grantfulltextnone-
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