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Yotiao protein, a ligand for the NMDA receptor, binds and targets cAMP-dependent protein kinase II(1)



Yotiao protein, a ligand for the NMDA receptor, binds and targets cAMP-dependent protein kinase II(1)



Febs Letters 464(3): 174-178



A yeast two-hybrid screen revealed that regulatory subunits (RII) of PKAII bind the Yotiao protein. Yotiao interacts with the NR1 subunit of the NMDA receptor. A purified C-terminal fragment of Yotiao binds PKAII, via an RII binding site constituted by amino acid residues 1452-1469, with a dissociation constant (K(d)) between 50 and 90 nM in vitro. A stable complex composed of Yotiao, RII and NR1 was immunoprecipitated from whole rat brain extracts. Immunostaining analysis disclosed that Yotiao, RIIbeta and NR1 colocalize in striatal and cerebellar neurons. Co-assembly of Yotiao/PKAII complexes with NR1 subunits may promote cAMP-dependent modulation of NMDA receptor activity at synapses, thereby influencing brain development and synaptic plasticity.

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Accession: 047989988

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PMID: 10618500


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