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10.1111/1462-2920.12095

http://scihub22266oqcxt.onion/10.1111/1462-2920.12095
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C4466117!4466117!23425591
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suck abstract from ncbi


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pmid23425591      Environ+Microbiol 2013 ; 15 (8): 2238-53
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  • A spider web strategy of type IV pili-mediated migration to build a fibre-like Psl polysaccharide matrix in Pseudomonas aeruginosa biofilms #MMPMID23425591
  • Wang S; Parsek MR; Wozniak DJ; Ma LZ
  • Environ Microbiol 2013[Aug]; 15 (8): 2238-53 PMID23425591show ga
  • Bacterial motilities participate in biofilm development. However, it is unknown how/if bacterial motility affects formation of the biofilm matrix. Psl polysaccharide is a key biofilm matrix component of Pseudomonas aeruginosa. Here we report that type IV pili (T4P)-mediated bacterial migration leads to the formation of a fibre-like Psl matrix. Deletion of T4P in wild type and flagella-deficient strains results in loss of the Psl-fibres and reduction of biofilm biomass in flow cell biofilms as well as pellicles at air-liquid interface. Bacteria lacking T4P-driven twitching motility including those that still express surface T4P are unable to form the Psl-fibres. Formation of a Psl-fibre matrix is critical for efficient biofilm formation, yet does not require flagella and polysaccharide Pel or alginate. The Psl-fibres are likely formed by Psl released from bacteria during T4P-mediated migration, a strategy similar to spider web formation. Starvation can couple Psl release and T4P-driven twitching motility. Furthermore, a radial-pattern Psl-fibre matrix is present in the middle of biofilms, a nutrient-deprived region. These imply a plausible model for how bacteria respond to nutrient-limited local environment to build a polysaccharide-fibre matrix by T4P-dependent, bacterial migration strategy. This strategy may have general significance for bacterial survival in natural and clinical settings.
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