Part 3 Flashcards
Enzymes
Control cell processes
Phosphorylation
The binding of a phosphate to a molecule with the intent of making it work
Cellular Response
The end product of the pathway is about the regulation of some cell processes
The responses are usually protein synthesis or product synthesis
Protein Kinase Cascades
Kinases turn ON processes by phosphorylating the molecule
The objective is to amplify the signal
Keeps cells from making excess ligand signals
Each step in the cascade can amplify a signal, but it can also control the reaction rate of the process
Protein Phosphotase Cascades
Turn OFF processes by removing a phosphate ion from the molecule
Amplification of the Signal
Only need small amount of the ligand to convey the message
The cascades amplify the signal at each step
Structure=Function
Different kinds of cells have different kinds and numbers of protein receptors.
Each controls a different process
Scaffolding Proteins
Allows for direct contact stimulation of multiple relay proteins at one time