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Updated: Aug 20, 2026

Measuring Protein Binding to F-actin by Co-sedimentation
Published on: May 18, 2017
Detection of binding partners to the profilin:actin complex by far Western and mass spectrometry analyses
Thomas Johansson1, Staffan Grenklo, Roger Karlsson
1Department of Cell Biology, WGI, Stockholm University, S-106 91 Stockholm, Sweden.
Abstract:
A method to search for interaction partners to the profilin:actin complex that can distinguish molecules that preferentially bind the complex from those that interact with profilin or actin separately is described. The procedure should be applicable for any situation where cell extracts or other complex samples are screened for the presence of protein molecules specifically recognizing a protein complex but having no or low affinity for its individual components. The method is readily combined with mass spectrometry for direct identification of detected proteins. In this study, Mena and Hsp70 were detected as interaction partners to profilin:actin.
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