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Osmosensing by transporter ProP is modulated by its cardiolipin (CL)‐dependent concentration at the poles of Escherichia coli cells. Other contributors to this phenomenon were sought with the BACterial Two‐Hybrid System (BACTH). The BACTH‐tagged variants T18‐ProP and T25‐ProP retained ProP function and localization. Their interaction confirmed the ProP homo‐dimerization previously established by protein...
Osmosensing transporter ProP protects bacteria from osmotically induced dehydration by mediating the uptake of zwitterionic osmolytes. ProP activity is a sigmoidal function of the osmolality. ProP orthologues share an extended, cytoplasmic C‐terminal domain. Orthologues with and without a C‐terminal, α‐helical coiled‐coil domain respond similarly to the osmolality. ProP concentrates at the poles and...
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