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lüll Superchannel of bacteria: biological significance and new horizons Murata K; Kawai S; Mikami B; Hashimoto WBiosci Biotechnol Biochem 2008[Feb]; 72 (2): 265-77Sphingomonas 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.|Alginates/metabolism[MESH]|Biological Evolution[MESH]|Biological Transport[MESH]|Cytoplasm/metabolism[MESH]|Polysaccharide-Lyases/metabolism[MESH]|Sphingomonas/enzymology/genetics/*metabolism/physiology[MESH] |