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    Synchronized dynamics of bacterial niche-specific functions during biofilm development in a cold seep brine pool

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    Zhang_et_al-2015-Environmental_Microbiology.pdf
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    Type
    Article
    Authors
    Zhang, Weipeng
    Wang, Yong
    Bougouffa, Salim cc
    Tian, Renmao
    Cao, Huiluo
    Li, Yongxin
    Cai, Lin
    Wong, Yue Him
    Zhang, Gen
    Zhou, Guowei
    Zhang, Xixiang cc
    Bajic, Vladimir B. cc
    Al-Suwailem, Abdulaziz M.
    Qian, Pei-Yuan cc
    KAUST Department
    Applied Mathematics and Computational Science Program
    Coastal and Marine Resources Core Lab
    Computational Bioscience Research Center (CBRC)
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    KAUST Global Partnership Program
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2015-08-17
    Online Publication Date
    2015-08-17
    Print Publication Date
    2015-10
    Permanent link to this record
    http://hdl.handle.net/10754/561085
    
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    Abstract
    The biology of biofilm in deep-sea environments is barely being explored. Here, biofilms were developed at the brine pool (characterized by limited carbon sources) and the normal bottom water adjacent to Thuwal cold seeps. Comparative metagenomics based on 50 Gb datasets identified polysaccharide degradation, nitrate reduction, and proteolysis as enriched functional categories for brine biofilms. The genomes of two dominant species: a novel deltaproteobacterium and a novel epsilonproteobacterium in the brine biofilms were reconstructed. Despite rather small genome sizes, the deltaproteobacterium possessed enhanced polysaccharide fermentation pathways, whereas the epsilonproteobacterium was a versatile nitrogen reactor possessing nar, nap and nif gene clusters. These metabolic functions, together with specific regulatory and hypersaline-tolerant genes, made the two bacteria unique compared with their close relatives including those from hydrothermal vents. Moreover, these functions were regulated by biofilm development, as both the abundance and the expression level of key functional genes were higher in later-stage biofilms, and co-occurrences between the two dominant bacteria were demonstrated. Collectively, unique mechanisms were revealed: i) polysaccharides fermentation, proteolysis interacted with nitrogen cycling to form a complex chain for energy generation; ii) remarkably, exploiting and organizing niche-specific functions would be an important strategy for biofilm-dependent adaptation to the extreme conditions.
    Citation
    Synchronized dynamics of bacterial niche-specific functions during biofilm development in a cold seep brine pool 2015:n/a Environmental Microbiology
    Publisher
    Wiley
    Journal
    Environmental Microbiology
    DOI
    10.1111/1462-2920.12978
    PubMed ID
    26171930
    Additional Links
    http://doi.wiley.com/10.1111/1462-2920.12978
    ae974a485f413a2113503eed53cd6c53
    10.1111/1462-2920.12978
    Scopus Count
    Collections
    Articles; Coastal and Marine Resources Core Lab; Applied Mathematics and Computational Science Program; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; Computational Bioscience Research Center (CBRC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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