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Una señal es una molécula o una propiedad física (ej. fuerza) que ...

Una señal es una molécula o una propiedad física (ej. fuerza) que ...

Una señal es una molécula o una propiedad física (ej. fuerza) que ...

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Diferent<strong>es</strong> proteínas G acoplan el receptor a efector<strong>es</strong> <strong>es</strong>pecíficos <strong>que</strong> pueden serenzimas o proteínas <strong>que</strong> forman un canal iónicoG α Subclass*EffectAssociated EffectorProtein2nd M<strong>es</strong>sengerG s(activación)Adenylyl cyclaseCa 2+ channelcAMPCa 2+G i(inhibición)Na + channelChange inmembrane potentialAdenylyl cyclasecAMPK + channelChange inmembrane potentialCa 2+ channelCa 2+G q Phospholipase CβIP 3 , DAGG oPhospholipase CβIP 3 , DAGCa 2+ channelCa 2+G t cGMPphosphodi<strong>es</strong>terasecGMPG bγPhospholipase CβIP 3 , DAGAdenylyl cyclasecAMP* A given G α may be associated with more than one effector protein. To date, only onemajor G sα has been identified, but multiple G qα and G iα proteins have been d<strong>es</strong>cribed. Insome cas<strong>es</strong> (not indicated in this table) effector proteins are regulated by coincidentbinding to G a and G bγ .KEY: = stimulation; ? = inhibition. IP 3 = inositol 1,4,5-trisphosphate; DAG = 1,2-diacylglycerol.

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