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  • Title: Physical interaction between the phage lambda receptor protein and the carrier-immobilized maltose-binding protein of Escherichia coli.
    Author: Bavoil P, Nikaido H.
    Journal: J Biol Chem; 1981 Nov 25; 256(22):11385-8. PubMed ID: 6457826.
    Abstract:
    When Triton X-100/EDTA extracts of the outer membrane of Escherichia coli K12 were passed through a column containing maltose-binding protein covalently linked to Sepharose 6MB beads, the phage lambda receptor protein or LamB protein was quantitatively and specifically adsorbed to the column and was eluted with a solution containing 1 M NaCl, but not with that containing 0.5 M maltose. The binding did not take place when columns containing inactivated Sepharose beads alone, or Sepharose bound to histidine-binding protein of Salmonella typhimurium, were used. This interaction is consistent with the hypothesis that the periplasmic maltose-binding protein interacts with the part of the LamB protein exposed on the inner surface of the outer membrane, thereby increasing the specificity of the solute penetration process through the LamB channel.
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