2drn

Docking and dimerization domain (D/D) of the Type II-alpha regulatory subunity of protein kinase A (PKA) in complex with a peptide from an A-kinase anchoring protein

spinqualitylabelsall models 2drn Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2drn is a 3 chain structure with sequence from Homo sapiens and Rattus norvegicus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function KAP2_RAT Regulatory subunit of the cAMP-dependent protein kinases involved in cAMP signaling in cells. Type II regulatory chains mediate membrane association by binding to anchoring proteins, including the MAP2 kinase. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The specificity of intracellular signaling events is controlled, in part, by compartmentalization of protein kinases and phosphatases. The subcellular localization of these enzymes is often maintained by protein- protein interactions. A prototypic example is the compartmentalization of the cAMP-dependent protein kinase (PKA) through its association with A-kinase anchoring proteins (AKAPs). A docking and dimerization domain (D/D) located within the first 45 residues of each regulatory (R) subunit protomer forms a high affinity binding site for its anchoring partner. We now report the structures of two D/D-AKAP peptide complexes obtained by solution NMR methods, one with Ht31(493-515) and the other with AKAP79(392-413). We present the first direct structural data demonstrating the helical nature of the peptides. The structures reveal conserved hydrophobic interaction surfaces on the helical AKAP peptides and the PKA R subunit, which are responsible for mediating the high affinity association in the complexes. In a departure from the dimer-dimer interactions seen in other X-type four-helix bundle dimeric proteins, our structures reveal a novel hydrophobic groove that accommodates one AKAP per RIIalpha D/D. A novel mechanism of PKA anchoring revealed by solution structures of anchoring complexes.,Newlon MG, Roy M, Morikis D, Carr DW, Westphal R, Scott JD, Jennings PA EMBO J. 2001 Apr 2;20(7):1651-62. PMID:11285229 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also CAMP-dependent protein kinase 3D structures

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