Abstract
AI-2 is an autoinducer made by many bacteria. LsrB binds AI-2 in the periplasm, and Tsr is the l-serine chemoreceptor. We show that AI-2 strongly attracts Escherichia coli. Both LsrB and Tsr are necessary for sensing AI-2, but AI-2 uptake is not, suggesting that LsrB and Tsr interact directly in the periplasm.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Bacterial Proteins / genetics
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Bacterial Proteins / metabolism*
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Carrier Proteins / genetics
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Carrier Proteins / metabolism*
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Chemotaxis*
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Escherichia coli / metabolism
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Escherichia coli / physiology*
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Escherichia coli Proteins / genetics
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Escherichia coli Proteins / metabolism*
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Homoserine / analogs & derivatives*
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Homoserine / metabolism
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Lactones / metabolism*
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Membrane Proteins / genetics
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Membrane Proteins / metabolism*
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Protein Binding
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Quorum Sensing*
Substances
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Bacterial Proteins
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Carrier Proteins
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Escherichia coli Proteins
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Lactones
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LsrB protein, E coli
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Membrane Proteins
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N-octanoylhomoserine lactone
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Tsr protein, Bacteria
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Homoserine