G-protein-coupled receptor-associated A-kinase anchoring proteins AKAP5 and AKAP12: differential signaling to MAPK and GPCR recycling
2008
Differential Signaling of AKAP5 and AKAP12 in Cell Signaling
publication
Evidence: high
Author Information
Author(s): Tao Jiangchuan, Malbon Craig C
Primary Institution: State University of New York at Stony Brook
Hypothesis
How do AKAP5 and AKAP12 differentially contribute to MAPK activation and GPCR recycling?
Conclusion
AKAP5 is essential for MAPK activation, while AKAP12 is crucial for receptor recycling.
Supporting Evidence
- AKAP5 is necessary for Erk1,2 activation in response to β-adrenergic stimulation.
- AKAP12 is essential for the resensitization and recycling of the β2-adrenergic receptor.
- Both AKAPs share common docking partners but have distinct roles in signaling.
- Knock-down of AKAP5 abolishes Erk1,2 activation.
- Knock-down of AKAP12 blocks receptor recycling.
Takeaway
This study shows that two proteins, AKAP5 and AKAP12, help cells respond to signals differently: one helps activate a pathway, and the other helps recycle receptors.
Methodology
The study used siRNA to knock down AKAP5 and AKAP12 in A431 and HEK293 cells to assess their roles in signaling.
Participant Demographics
Human epidermoid carcinoma A431 cells and human embryonic kidney HEK293 cells.
Statistical Information
P-Value
p ≤ 0.01
Statistical Significance
p ≤ 0.01
Digital Object Identifier (DOI)
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