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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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AMY-1 interacts with S-AKAP84 and AKAP95 in the cytoplasm and the nucleus, respectively, and inhibits cAMP-dependent protein kinase activity by preventing binding of its catalytic subunit to A-kinase-anchoring protein (AKAP) complex.

We have reported that a novel c-Myc-binding protein, AMY-1, binds to cAMP-dependent protein kinase-anchoring protein 149 (AKAP149) and its splicing variant, AKAP84 and is localized in the mitochondria in a complex with RII, a regulatory subunit of cAMP-dependent protein kinase (PKA) (Furusawa, M., Ohnishi, T., Taira, T., Iguchi-Ariga, S. M. M., and Ariga, H. (2001) J. Biol. Chem. 276, 36647-36651). In this study, we further found that AMY-1 competitively bound to either AKAP95 or AKAP84 in the nucleus and the cytoplasm, respectively, in a concentration-dependent manner of either AKAP. Like AKAP84, AMY-1 was found to bind to the RII- binding region of AKAP95 in vivo and in vitro and to make a ternary complex with RII. It was also found that the formation of the complex of AMY-1 with AKAP84/95 and RII prevented a catalytic subunit from binding to this AKAP complex, leading to suppression of PKA activity. These findings suggest that AMY-1 is an important modulator of PKA.[1]

References

  1. AMY-1 interacts with S-AKAP84 and AKAP95 in the cytoplasm and the nucleus, respectively, and inhibits cAMP-dependent protein kinase activity by preventing binding of its catalytic subunit to A-kinase-anchoring protein (AKAP) complex. Furusawa, M., Taira, T., Iguchi-Ariga, S.M., Ariga, H. J. Biol. Chem. (2002) [Pubmed]
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