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FEMS Microbiol Lett. 2000 Mar 15;184(2):187-92.

MsiK-dependent trehalose uptake in Streptomyces reticuli.

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1
FB Biologie/Chemie, Universität Osnabrück, Barbarastrasse 11, 49069, Osnabrück, Germany. schloesser@biologie.uni-osnabrueck.de

Abstract

During cultivation in the presence of trehalose Streptomyces reticuli expresses an inducible, highly specific trehalose uptake system that is absent in Streptomyces lividans. A palmitated trehalose-binding protein was identified in the cytoplasmic membrane of mycelia, extracted with the detergent Triton X-100 and purified using a trehalose affinity matrix. Immunological studies showed that within S. reticuli the synthesis of the ATP-binding protein MsiK is induced by trehalose. The data suggest that MsiK assists the trehalose ABC transporter, like the previously described ABC transport systems for maltose and cellobiose/cellotriose, respectively.

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