m-Bop, a repressor protein essential for cardiogenesis, interacts with skNAC, a heart- and muscle-specific transcription factor.
The m-Bop protein encoded by the mouse Bop gene is strongly expressed in heart and skeletal muscle, and recent studies with Bop knockout mice have demonstrated that m-Bop is essential for cardiogenesis in vivo and can act as a HDAC-dependent repressor in vitro. In the present studies, m-Bop was observed ... to interact with skNAC, a reported transcriptional activator specific to heart and skeletal muscle. The amino-terminal S region of the split S-ET domain of m-Bop as well as the MYND domain were required for interaction with skNAC in both the two-hybrid system and in coimmunoprecipitation experiments from cultured mammalian cells. As shown previously for interaction of the MYND domain-containing transcriptional corepressor, BS69, with several viral and cellular oncoproteins, a PXLXP motif in skNAC was required for interaction with m-Bop. Similar kinetics of induction and localization of m-Bop and skNAC during the induction of myogenesis in cultured C2C12 cells suggests a possible associated role for these proteins during this process.
Mesh Terms:
Animals, Carrier Proteins, Cell Line, DNA-Binding Proteins, Heart, Humans, Kinetics, Mice, Mice, Knockout, Molecular Chaperones, Muscle Proteins, Muscle, Skeletal, Protein Binding, Trans-Activators, Transcription Factors, Two-Hybrid System Techniques
Animals, Carrier Proteins, Cell Line, DNA-Binding Proteins, Heart, Humans, Kinetics, Mice, Mice, Knockout, Molecular Chaperones, Muscle Proteins, Muscle, Skeletal, Protein Binding, Trans-Activators, Transcription Factors, Two-Hybrid System Techniques
J. Biol. Chem.
Date: Jul. 19, 2002
PubMed ID: 12011100
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