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Updated: Jul 1, 2026
Identification of Protein Interacting Partners Using Tandem Affinity Purification
Published on: February 25, 2012
Protocols for monitoring condensate formation and dynamics between the phase-separating proteins SET/TAF-Iβ and
Miguel Á Casado-Combreras1, Miguel A De la Rosa1, Irene Díaz-Moreno1
1Institute for Chemical Research (IIQ), Scientific Research Center "Isla de la Cartuja" (cicCartuja), University of Seville - CSIC, Seville, Spain.
Abstract:
The targeting of several nuclear stress-response factors by translocated cytochrome c upon genotoxic stress has been demonstrated in recent years to involve liquid-liquid phase separation. This protocol addresses the need to investigate the mechanisms and features of phase separation of the histone chaperone SET/TAF-Iβ induced by cytochrome c. We provide steps for protein purification and fluorescent labeling, condensate formation, imaging, quantification, and evaluation of their dynamics by fluorescence recovery after photobleaching (FRAP). This protocol can be broadly applied to other protein complexes. For complete details on the use and execution of this protocol, please refer to Casado-Combreras et al.1.
