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. 1996 Mar 15;271(5255):1589-92.
doi: 10.1126/science.271.5255.1589.

Coordination of three signaling enzymes by AKAP79, a mammalian scaffold protein

T M Klauck  1 , M C Faux, K Labudda, L K Langeberg, S Jaken, J D Scott
Affiliations

Coordination of three signaling enzymes by AKAP79, a mammalian scaffold protein

T M Klauck et al. Science. .

Abstract

Multivalent binding proteins, such as the yeast scaffold protein Sterile-5, coordinate the location of kinases by serving as platforms for the assembly of signaling units. Similarly, in mammalian cells the cyclic adenosine 3',5'-monophosphate-dependent protein kinase (PKA) and phosphatase 2B [calcineurin (CaN)] are complexed by an A kinase anchoring protein, AKAP79. Deletion analysis and binding studies demonstrate that a third enzyme, protein kinase C (PKC), binds AKAP79 at a site distinct from those bound by PKA or CaN. The subcellular distributions of PKC and AKAP79 were similar in neurons. Thus, AKAP79 appears to function as a scaffold protein for three multifunctional enzymes.

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