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Analisis of PKA Binding to A-Kinase Anchoring Proteins Using Fluorescence Resonance Energy Transfer

Published online by Cambridge University Press:  02 July 2020

M. L. Ruehr  and
M.. Bond
M. L. Ruehr
Affiliation:
Department of Molecular Cardiology, Cleveland Clinic Foundation, Cleveland, OH44195
M.. Bond
Affiliation:
Department of Molecular Cardiology, Cleveland Clinic Foundation, Cleveland, OH44195
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Extract

The cAMP dependent-protein kinase (PKA) signaling pathway plays a key role in the sympathetic regulation of muscle contraction in adult cardiac myocytes. This pathway may be regulated via compartmentalization of its components, whereby A-kinase anchoring proteins (AKAPs) tether PKA to specific subcellular areas to give each receptor binding event specificity. The purpose of this study is to investigate the binding kinetics between Ht31, a peptide containing the PKA binding portion of an AKAP from human thyroid, and the regulatory subunit of PKA (R).

Fluorescence resonance energy transfer (FRET) was used to monitor binding events between the type II regulatory subunit of PKA (RE) and Ht31 or Ht31P, a mutated form of Ht31 which does not bind RII. Each protein was fused to a derivative of the green fluorescent protein (GFP) so that the excitation-emission spectra of the two fluorescent proteins overlap.

Type
Molecular Optical Spectroscopy in Biology
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 508 - 509
Copyright
Copyright © Microscopy Society of America

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