Double sensory domain of two-component sensor kinase
Cache_3 is the periplasmic sensor domains of sensor histidine kinase of E. coli DcuS. This domain forms one of the components of the two-component signalling system that allows bacteria to adapt to changing environments. The ability of bacteria to monitor and adapt to their environment is crucial to their survival, and two-component signal transduction systems mediate most of these adaptive responses. One component is a histidine kinase sensor - this domain - most commonly part of a homodimeric transmembrane sensor protein, and the second component is a cytoplasmic response regulator. The two components interact in tandem through a phospho-transfer cascade.
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