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  • Title: Structural studies on bacterial system used in the recognition and uptake of the macromolecule alginate.
    Author: Maruyama Y, Hashimoto W, Murata K.
    Journal: Biosci Biotechnol Biochem; 2019 May; 83(5):794-802. PubMed ID: 30744540.
    Abstract:
    Alginate is an acidic heteropolysaccharide produced by brown seaweed and certain kinds of bacteria. The cells of Sphingomonas sp. strain A1, a gram-negative bacterium, have several alginate-degrading enzymes in their cytoplasm and efficiently utilize this polymer for their growth. Sphingomonas sp. strain A1 cells can directly incorporate alginate into their cytoplasm through a transport system consisting of a "pit" on their cell surface, substrate-binding proteins in their periplasm, and an ATP-binding cassette transporter in their inner membrane. This review deals with the structural and functional aspects of bacterial systems necessary for the recognition and uptake of alginate.
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