célfehéjérék

Célfehérjék, also known as target proteins, are molecules within a cell that are affected by a particular drug, hormone, or other substance. These proteins are the primary sites of action for many biological molecules, playing a crucial role in mediating cellular responses. When a signaling molecule, such as a hormone or neurotransmitter, binds to its receptor on the cell surface, it initiates a cascade of events that ultimately leads to a change in the activity of one or more célfehérjék.

These target proteins can be enzymes, receptors, ion channels, transcription factors, or structural proteins. For example, many drugs work by either activating or inhibiting the function of specific célfehérjék. Antihypertensive medications, for instance, may target proteins involved in regulating blood pressure. Similarly, hormones exert their effects by binding to receptors that, in turn, alter the function of downstream célfehérjék. Understanding the identity and function of célfehérjék is therefore fundamental to comprehending cellular physiology and the mechanisms of action for various therapeutic agents and natural signaling molecules. The specificity of these interactions is key to biological processes, ensuring that cellular responses are precise and controlled.