Adenosine 3':5'-monophosphate receptor proteins in mammalian brain
- PMID: 210173
Adenosine 3':5'-monophosphate receptor proteins in mammalian brain
Abstract
cAMP receptor proteins present in mammalian brain were identified and characterized with the use of the photoaffinity label 8-azido[32P]cAMP. Cytosol and membrane fractions from various regions of rat, guinea pig, and bovine brain contained two specific cAMP receptor proteins with apparent molecular weights of 47,000 and 52,000 to 55,000. Subcellular fractionation studies showed the highest amounts of these cAMP receptor proteins associated with cytosol fractions and synaptic membrane fractions. For both the cytosol and membrane fractions, the two cAMP receptor proteins represented almost all of the proteins specifically labeled by 8-azidol[32P]cAMP and appeared to be the regulatory subunits of cAMP-dependent protein kinases.
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