Award review: Superchannel of bacteria: biological significance and new horizons

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  • MURATA Kousaku
    Laboratory of Basic and Applied Molecular Biotechnology, Graduate School of Agriculture, Kyoto University
  • KAWAI Shigeyuki
    Laboratory of Basic and Applied Molecular Biotechnology, Graduate School of Agriculture, Kyoto University
  • MIKAMI Bunzo
    Laboratory of Applied Structural Biology, Graduate School of Agriculture, Kyoto University
  • HASHIMOTO Wataru
    Laboratory of Basic and Applied Molecular Biotechnology, Graduate School of Agriculture, Kyoto University

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  • Superchannel of Bacteria: Biological Significance and New Horizons

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Sphingomonas species A1 is a newly identified pit-forming bacterium that directly incorporates a macromolecule (alginate) into its cytoplasm through a pit-dependent transport system, which we termed a superchannel. A pit is a novel, high-dimensional organ acquired through the fluidity and reconstitution of cell surface molecules, including flagellin, and through cooperation with the transport machinery in the cells, which confers upon bacterial cells a more efficient way to secure and assimilate macromolecules. The analysis of the superchannel changes general ideas regarding the fluidity and function of the cell surface, evolution and origin of cell-surface organs, including flagella, transport, and assimilation systems of macromolecules, and the divergence and energetics of metabolism.

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