Myogenin (MYOG)

Myogenin (MYOG) is a muscle-specific transcription factor necessary for the final differentiation and fusion of muscle precursor cells (myoblasts) into mature skeletal muscle fibers, marking the commitment to muscle lineage[1][3]. It belongs to the basic helix-loop-helix (bHLH) family and works as a key regulatory factor in muscle development—activated early in myogenesis and modulated by electrical and calcium signals, upstream transcription factors, and chromatin remodeling enzymes[1]. MYOG regulates a suite of muscle-specific target genes, ensures myocyte fusion, coordinates muscle stem cell quiescence and activation, and promotes cell cycle exit as muscle cells terminally differentiate[1][2][3]. Beyond development, MYOG affects adult muscle homeostasis, adaptation, and repair, with dysregulation implicated in pathological muscle atrophy and certain muscle cancers, such as rhabdomyosarcoma, where MYOG serves as a sensitive biomarker[1][2][3]. Importantly, MYOG is not considered a classical receptor, enzyme, or ion channel, but a transcription factor essential for muscle lineage specification, making it a diagnostic tool rather than a direct pharmacological target.

Other names

Myogenic factor 4MYF4bHLHc3Myf-4Class C basic helix-loop-helix protein 3myogeninBHLHC3

Not applicable; MYOG is not a known enzymatic, receptor, or directly druggable target; instead, it is a transcriptional regulator used as a diagnostic/prognostic biomarker[1][3].