BIOL 102 Chapter Notes - Chapter 9: Signal Transduction, Conformational Change, Dissociation Constant
Document Summary
Chapter 9: cell communication: cell communication is about information processing all cells are capable of sending and receiving signals, either from the environment or from other cells. Example in yeast cells when exposed to glucose the glucose will act as a ligand to activate glucose receptors and result in a signal transduction cascade to metabolize the glucose as well as shut down the metabolism. Intracellular receptors some receptors are inside the cell, so the signal has to pass through the cell membrane before binding to the receptor. Receptor activation the external signaling molecule binds to a receptor protein, either on the surface or inside a cell and causes a conformational change in a receptor and activates its function. Signal transduction the activated receptor stimulates a series of proteins that forms a signal transduction pathway. Cellular response the signal transduction pathway affects the functions and/or amounts of cellular proteins, thereby producing a cellular response. binding of molecule causes conformational change.