MAFG v maf musculoaponeurotic fibrosarcoma oncogene homolog G (avian)
Transcription factor MafG
V maf musculoaponeurotic fibrosarcoma oncogene homolog G
V-maf musculoaponeurotic fibrosarcoma oncogene homolog G
FunctionSince they lack a putative transactivation domain, the small Mafs behave as transcriptional repressors when they dimerize among themselves. However, they seem to serve as transcriptional activators by dimerizing with other (usually larger) basic-zipper proteins and recruiting them to specific DNA-binding sites. Small Maf proteins heterodimerize with Fos and may act as competitive repressors of the NF-E2 transcription factor. Transcription factor, component of erythroid-specific transcription factor NF-E2. Activates globin gene expression when associated with NF-E2. May be involved in signal transduction of extracellular H(+).
Tissue specificityHighly expressed in skeletal muscle. Also expressed in heart and brain.
Sequence similaritiesBelongs to the bZIP family. Maf subfamily. Contains 1 bZIP domain.
Post-translational modificationsAcetylated in erythroid cells by CREB-binding protein (CBP). Acetylation augments the DNA-binding activity of NFE2, but has no effect on binding NFE2. Sumoylation at Lys-14 is required for active transcriptional repression.