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Question

What is cAMP receptor protein?


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Solution

Receptor protein:

  1. Receptor proteins are present in the cell membrane and are perceptive to the presence of particular extracellular molecules known as ligands.
  2. It is a protein that binds inside the promoter of the operon region and facilitates the affinity of the promoter for RNA polymerase.
  3. In case of the condition where glucose is missing, the cell gathers the cAMP (cyclic AMP), a nucleotide that is derived from the ATP.
  4. This cyclic-AMP binds to the lac promoter by activating CAP.
  5. When there is an increase in the concentration of glucose, the glucose catabolism reduces the cAMP’s intracellular concentration.
  6. As a result, the cAMP releases the CRP.

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