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Flavins mediate extracellular electron transfer in Gram-positive Bacillus megaterium strain LLD-1.

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Title: Flavins mediate extracellular electron transfer in Gram-positive Bacillus megaterium strain LLD-1.
Authors: You, Le-Xing1,2, Liu, Li-Dan1,3, Xiao, Yong1,4 yxiao@iue.ac.cn, Dai, You-Fen1,3, Chen, Bi-Lian3, Jiang, Yan-Xia2, Zhao, Feng1
Source: Bioelectrochemistry. Feb2018, Vol. 119, p196-202. 7p.
Subjects: Flavins, Charge exchange, Bacillus megaterium, Ribosomal RNA, Electrochemistry
Abstract: The extracellular electron transfer (EET) mechanism of an isolated Gram-positive Bacillus megaterium strain (LLD-1), identified by 16S rRNA gene sequencing and physiological analysis, was investigated in the present study. The electrochemical activity of strain LLD-1 was confirmed by electrochemical E - t and amperometric I - t tests. Flavins in culture suspension from strain LLD-1 were further proved to be able to act as electron shuttles, strengthening the electron transfer from LLD-1 to the electrode. The output voltage and current output were increased 2.8 times and 3.7 times, respectively, by adding 100 nM exogenetic flavins into microbial fuel cells inoculated with LLD-1. Electricity generation by LLD-1 from different carbon sources can be enhanced by adding 100 nM exogenetic flavins. This study indicated that flavins were essential to the EET process of the Gram-positive strain LLD-1. Furthermore, a putative EET model for B. megaterium strain LLD-1 and even for Gram-positive bacteria was proposed. [ABSTRACT FROM AUTHOR]
Copyright of Bioelectrochemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 126365050
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Flavins mediate extracellular electron transfer in Gram-positive Bacillus megaterium strain LLD-1.
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  Data: <searchLink fieldCode="AR" term="%22You%2C+Le-Xing%22">You, Le-Xing</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Liu%2C+Li-Dan%22">Liu, Li-Dan</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Yong%22">Xiao, Yong</searchLink><relatesTo>1,4</relatesTo><i> yxiao@iue.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Dai%2C+You-Fen%22">Dai, You-Fen</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Bi-Lian%22">Chen, Bi-Lian</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Jiang%2C+Yan-Xia%22">Jiang, Yan-Xia</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Feng%22">Zhao, Feng</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Bioelectrochemistry%22">Bioelectrochemistry</searchLink>. Feb2018, Vol. 119, p196-202. 7p.
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  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Flavins%22">Flavins</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+exchange%22">Charge exchange</searchLink><br /><searchLink fieldCode="DE" term="%22Bacillus+megaterium%22">Bacillus megaterium</searchLink><br /><searchLink fieldCode="DE" term="%22Ribosomal+RNA%22">Ribosomal RNA</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The extracellular electron transfer (EET) mechanism of an isolated Gram-positive Bacillus megaterium strain (LLD-1), identified by 16S rRNA gene sequencing and physiological analysis, was investigated in the present study. The electrochemical activity of strain LLD-1 was confirmed by electrochemical E - t and amperometric I - t tests. Flavins in culture suspension from strain LLD-1 were further proved to be able to act as electron shuttles, strengthening the electron transfer from LLD-1 to the electrode. The output voltage and current output were increased 2.8 times and 3.7 times, respectively, by adding 100 nM exogenetic flavins into microbial fuel cells inoculated with LLD-1. Electricity generation by LLD-1 from different carbon sources can be enhanced by adding 100 nM exogenetic flavins. This study indicated that flavins were essential to the EET process of the Gram-positive strain LLD-1. Furthermore, a putative EET model for B. megaterium strain LLD-1 and even for Gram-positive bacteria was proposed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Bioelectrochemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.bioelechem.2017.10.005
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      – Code: eng
        Text: English
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        PageCount: 7
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      – SubjectFull: Flavins
        Type: general
      – SubjectFull: Charge exchange
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      – SubjectFull: Bacillus megaterium
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      – SubjectFull: Ribosomal RNA
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              Text: Feb2018
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              Y: 2018
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