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Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry
14:47

Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry

Published on: May 17, 2016

Regulation of myocardin-related transcriptional coactivators through cofactor interactions in differentiation and

Dominique T Brandt1, Jianming Xu, Herbert Steinbeisser

  • 1Institute of Pharmacology, University of Heidelberg, Heidelberg, Germany. robert.grosse@pharma.uni-heidelberg.de

Cell Cycle (Georgetown, Tex.)
|July 24, 2009
PubMed

Insights

The suppressor of cancer cell invasion (SCAI) protein interacts with myocardin-related transcription factors (MRTFs), including MAL (MRTF-A). SCAI influences cell migration and gene regulation in various conditions like cancer and development.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • Transcriptional regulation relies on transcription factors and cofactors forming complexes.
  • Myocardin-related transcription factors (MRTFs) are key coactivators for transcription factors like SRF.
  • The role of novel cofactors in modulating MRTF activity is an area of active investigation.

Purpose of the Study:

  • To investigate the function of SCAI (suppressor of cancer cell invasion) as a regulator of MRTF activity.
  • To determine the interaction between SCAI and MAL (MRTF-A) and its impact on cancer cell migration.
  • To explore the broader roles of SCAI in different cellular contexts and with other MRTF family members.

Main Methods:

  • Co-immunoprecipitation assays to confirm protein interactions.
  • Analysis of gene expression related to beta1-integrin.
  • Functional assays assessing cancer cell migration and invasion.
  • Studies involving different MRTF family members and oncogenic fusion proteins.

Main Results:

  • SCAI associates with MAL (MRTF-A).
  • SCAI modulates invasive cancer cell migration by regulating beta1-integrin expression and function.
  • SCAI can inhibit MAL (MRTF-A) and also regulate other MRTFs like myocardin and the OTT-MAL fusion protein.

Conclusions:

  • SCAI is a versatile regulator with functions extending beyond MAL (MRTF-A) inhibition.
  • SCAI plays a role in cancer cell migration and potentially in development and differentiation.
  • Further research is warranted to elucidate the full spectrum of SCAI functions in diverse biological settings.

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