NCIt synonyms : MSC; bHLHa22; ABF-1; Activated B-Cell Factor 1; Myogenic Repressor; Activated B-cell Factor-1; Class A Basic Helix-Loop-Helix Protein 22;
NCIt definition : Musculin (206 aa, 22 kDa) is encoded by the human MSC gene. This protein plays a
role in both transcriptional regulation and DNA binding.;
NCIt note : MSC is capable of binding an E-box element either as a homodimer or as a heterodimer
with E2A in vitro, and forms heterodimers with E2A proteins in vivo. MSC contains
a transcriptional repression domain and is capable of inhibiting the transactivation
capability of E47, an E2A protein, in mammalian cells. MSC is a downstream target
of the B-cell receptor signal transduction pathway. Mice engineered to lack the protein
lack muscle structures derived from the first brachial arch. (EntrezGene and OMIM);