Interaction of FliS flagellar chaperone with flagellin.
[No authors listed]
摘要
Premature polymerization of flagellin (FliC), the main component of flagellar filaments, is prevented by the FliS chaperone in the cytosol. Interaction of FliS with flagellin was characterized by isothermal titration calorimetry producing an association constant of 1.9x10(7) M-1 and a binding stoichiometry of 1:1. Experiments with truncated FliC fragments demonstrated that the C-terminal disordered region of flagellin is essential for FliS binding. As revealed by thermal unfolding experiments, FliS does not function as an antifolding factor keeping flagellin in a secretion-competent conformation. Instead, FliS binding facilitates the formation of alpha-helical secondary structure in the chaperone binding region of flagellin.
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基因功能
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原始数据
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文献解读
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