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Complete genome sequence of the dissimilatory azo reducing thermophilic bacterium Novibacillus thermophiles SG-1.

A new interesting article has been published in J Biotechnol. 2018 Oct 20;284:6-10. doi: 10.1016/j.jbiotec.2018.07.032. Epub 2018 Jul 24. and titled:

Complete genome sequence of the dissimilatory azo reducing thermophilic bacterium Novibacillus thermophiles SG-1.

Authors of this article are:

Tang J, Wang Y, Yang G, Luo H, Zhuang L, Yu Z, Zhou S.

A summary of the article is shown below:

With the isolation and identification of efficient azo-dye degradation bacteria, bioaugmentation with specific microbial strains has now become an effective strategy to promote the bioremediation of azo dye. However, Azo dye wastewater discharged at high temperature restricted the extensive application of the known mesophilic azoreducing microorganisms. Here we present the complete genome sequence of a bacterium capable of reducing azo dye under thermophilic condition, Novibacillus thermophiles SG-1 (=KCTC 33118T =CGMCC 1.12363T). The complete genome of strain SG-1 contains a circular chromosome of 3,629,225 bp with a G + C content of 50.44%. Genome analysis revealed that strain SG-1 possessed genes encoding riboflavin biosynthesis protein that would secrete riboflavin, which could act as electron shuttles to transport the electrons to extracellular azo dye in decolorization process. HPLC analysis showed that the concentration of riboflavin increased from 0.01 μM to 0.255 μM with the growth of strain SG-1 under azo dye reduction. Quantitative real-time PCR analysis further demonstrated that the gene encoding riboflavin biosynthesis protein would be involved in the azo dye decolorization. The results from this study would be beneficial to research the mechanism of anaerobic reduction of azo dye under thermophilic conditions.

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This article is a good source of information and a good way to become familiar with topics such as:

Anaerobic azo reduction;Complete genome sequence;Electron transport;Novibacillus thermophilesSG-1;Thermophilic condition

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