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G Proteins and 7 TM receptors
EXAM 2
30
Medical
Professional
09/07/2010

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Cards

Term
what binds to family 1a GPCR's?
Definition
retinal odorants, catecholamines, ATP, opiates enkephalins anandamide.
Term
what binds to family 1b GPCR's?
Definition
peptides, cytokines, AA's, thrombin
Term
what binds to family 1c GPCR's?
Definition
glycoproteins hormones (LH, TSH, FSH)
Term
what binds to family 2 GPCR's?
Definition
calcitonin, secretine, PTH, VIP, GnRH
Term
what binds to family 3 GPCR's?
Definition
Glutamate (metabotropic), Ca+, GABA
Term
what happens once nucleotide exchange occurs?
Definition
the alpha unit on the G protein leaves with a GTP
Term
what effect does PKA have on CREB and gene transcription?
Definition
it goes into the nucleus and activates gene transcription
Term
what state is glycogen synthase in when phosphorylated?
Definition
inactive state
Term
cholera toxin targets what?
Definition
Gas by inhibiting the ATPase of the alpha subunit leading to continuous action.
Term
what the mech of action for Pertussis Toxin?
Definition
targets Gai by inhibiting it.
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
what is the purpose of BARK?
Definition
the desensitizes the receptor when phosphorylated
Term
how is cAMP conc. decreased?
Definition
phosphodiesterase
Term
what dephosphorylates PKA
Definition
phosphatase1
Term
what three things causes CREB activation?
Definition
PKC, PKA and CaMKII
Term
Phosphorylase kinase activation requires
Definition
PKA and Ca-calmodulin
Term
what are the two ways PKC activates transcription?
Definition
It can activate MAPK phoshphorylating it

It can phosphorylate Ik-B which releases nf-kb to transcribe
Term
how does MAPK activation happen
Definition
RTK->ras->mapk->erk

PKC
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