Related Experiment Video
Updated: May 2, 2026

Chromatin Immunoprecipitation Assay for Tissue-specific Genes using Early-stage Mouse Embryos
Published on: April 29, 2011
I-mf, a novel myogenic repressor, interacts with members of the MyoD family
C M Chen1, N Kraut, M Groudine
1Division of Basic Sciences Fred Hutchinson Cancer Research Center, Seattle, Washington 98104, USA.
Abstract:
During embryogenesis, cells from the ventral and dorsal parts of the somites give rise to sclerotome and dermomyotome, respectively. Dermomyotome contains skeletal muscle precursors that are determined by the MyoD family of myogenic factors. We have isolated a novel myogenic repressor, I-mf (Inhibitor of MyoD family), which is highly expressed in the sclerotome. In contrast, MyoD family members are concentrated in the dermomyotome. We demonstrate that I-mf inhibits the transactivation activity of the MyoD family and represses myogenesis. I-mf associates with MyoD family members and retains them in the cytoplasm by masking their nuclear localization signals. I-mf can also interfere with the DNA binding activity of MyoD family members. We postulate that I-mf plays an important role in the patterning of the somite early in development.
Related Concept Videos
Co-activators and Co-repressors
Master Transcription Regulators
Overview of Myosin Structure and Function
Actin and Myosin in Muscle Contraction
Formation of Muscle Fibers from Myoblasts
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Satellite Stem Cells and Muscular Dystrophy

