BS 161 Lecture Notes - Lecture 18: Signal Transduction, Cytosol, Cyclic Adenosine Monophosphate
Document Summary
The signaling molecule(a ligand) binds and activates a receptor in the responding cell. The receptor transmits a message to the cell through the cytoplasm in a process called signal transduction. It can activate enzymes, turn on genes, signal other cells, and cause the cell to divide or change shape. Once the signal has been received and acted upon, it is terminated. The receptor transmits a message to the cell through the cytoplasm . The binding affinity of the receptor ot the signaling molecule. The concentration of the signaling molecule in the vicinity of the receptor. Level of expression of the signal transduction proteins. The distance of the signaling: know the relative distances of these four types of signaling processes. Paracrine = short distance through a couple of cells. Contact dependent = one cell to another. Allosteric = binding an effector molecule at a site other than the enzyme"s active site .