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Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis
นักวิจัย : Ng, Chun Kiat , Sivakumar, Krishnakumar , Liu, Xin , Madhaiyan, Munusamy , Ji, Lianghui , Yang, Liang , Tang, Chuyang Y. , Song, Hao , Kjelleberg, Staffan , Cao, Bin
คำค้น : DRNTU::Engineering::Chemical engineering::Biotechnology.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2556
อ้างอิง : Ng, 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. , http://hdl.handle.net/10220/17227 , http://dx.doi.org/10.1002/bit.24856
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Biotechnology and bioengineering
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

The 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.

NRF (Natl Research Foundation, S’pore)

MOE (Min. of Education, S’pore)

บรรณานุกรม :
Ng, Chun Kiat , Sivakumar, Krishnakumar , Liu, Xin , Madhaiyan, Munusamy , Ji, Lianghui , Yang, Liang , Tang, Chuyang Y. , Song, Hao , Kjelleberg, Staffan , Cao, Bin . (2556). Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ng, Chun Kiat , Sivakumar, Krishnakumar , Liu, Xin , Madhaiyan, Munusamy , Ji, Lianghui , Yang, Liang , Tang, Chuyang Y. , Song, Hao , Kjelleberg, Staffan , Cao, Bin . 2556. "Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ng, Chun Kiat , Sivakumar, Krishnakumar , Liu, Xin , Madhaiyan, Munusamy , Ji, Lianghui , Yang, Liang , Tang, Chuyang Y. , Song, Hao , Kjelleberg, Staffan , Cao, Bin . "Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2556. Print.
Ng, Chun Kiat , Sivakumar, Krishnakumar , Liu, Xin , Madhaiyan, Munusamy , Ji, Lianghui , Yang, Liang , Tang, Chuyang Y. , Song, Hao , Kjelleberg, Staffan , Cao, Bin . Influence of outer membrane c-type cytochromes on particle size and activity of extracellular nanoparticles produced by Shewanella oneidensis. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2556.