Beta-2 adrenergic receptor
Mammalian protein found in humans
Beta-2 adrenergic receptor
The beta-2 adrenergic receptor (β2 adrenoreceptor), also known as ADRB2, is a cell membrane-spanning beta-adrenergic receptor that binds epinephrine (adrenaline), a hormone and neurotransmitter whose signaling, via adenylate cyclase stimulation through trimeric Gs proteins, increases cAMP, and, via downstream L-type calcium channel interaction, mediates physiologic responses such as smooth muscle relaxation and bronchodilation. Robert Lefkowitz and Brian Kobilka's study of the beta-2 adrenergic receptor as a model system earned them the 2012 Nobel Prize in Chemistry "for studies of G-protein-coupled receptors". The official symbol for the human gene encoding the β2 adrenoreceptor is ADRB2.
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