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Quiz 2 receptors

Phosphorylation The chemical process of adding a phosphate group to a molecular compound.
G protein-coupled receptor kinase An enzyme that catalyzes phosphorylations within cells in response to G-proteins
Arrestin Proteins that inhibit G protein-coupled receptors following phosphorylation of G protein-coupled receptor kinases
Tyrosine kinase Enzymes that act as on/off switches by transferring their attached phosphate group to other molecules in the cell to activate or deactivate them
Calmodulin A molecule that binds to calcium and mediates calcium's secondary messenger actions
Glycosylation A chemical reaction that attaches carbohydrate to proteins or other molecules
Catecholamines A group of molecules dervied from amino acid tyrosine including epinephrine, norepinephrine, and dopamine
Ionotropic receptors Proteins receptors within the plasma membrane that form an ion channel pore
Metabotropic receptors Protein receptors within the plasma membrane that stimulate changes within the cell often via G proteins and activation of secondary messengers
Hormone response element A short sequence of DNA within the promoter region of a gene that binds to a hormone-receptor complex to control gene expression
Cyclic AMP A secondary messenger derived from ATP that initiates multiple biochemical reactions within the cells in response to hormone-receptor binding
Signal transduction A process in which an external signal outside a cell is converted into biochemical changes within the cell
G Protein Guanine nucleotide-binding proteins are intracellular membrance-associated proteins that initiate biochemical reactions within the cell when receptors are activated by chemical signals
Iodothyronine deiodinases An enzyme that removes iodine from thyronin molecules
Enzyme-coupled receptors Receptors within plasma membrane that upon contact with a chemical messenger cause the intracellular part of the receptor to catalyze a reaction
Prohormone A committed precursor of a hormone, usually having mininal hormonal effect by itself
Small nuclear ribonucleoproteins (sNRPs-snurps) Enzymes that remove introns from the pre-mRNA before it leaves the nucleus
Clathrin A surface protein found on cellular vesicles. It has a recognition site for the appropriate molecule to be transported within the correct vesicle to outside of the cell
Adenyl Cyclase An enzyme that catalyzes ATP to cAMP in response to G-proteins
Phospholiapse C Membrane-associated enzymes, which cleave fatty acids and are involved in signal transduction
Internalization A process by which membrane receptors are lost due to endocytosis and recycling  of receptors
Ligand A molecule that binds to a receptor such as a hormone or a neurotransmitter 
Microsomes Intracellular calcium stores
Created by: Jackline2