Synonyms: Activator protein 1,AP 1,C FOS,Cellular oncogene c fos,Cellular oncogene fos,FBJ murine osteosarcoma viral (v fos) oncogene homolog (oncogene FOS),FBJ murine osteosarcoma viral oncogene homolog,FBJ murine osteosarcoma viral v fos oncogene homolog,FBJ Osteosarcoma Virus,FOS,FOS protein,FOS,G0 G1 switch regulatory protein 7,G0/G1 switch regulatory protein 7,G0S7,Oncogene FOS,p55,proto oncogene c Fos,Proto oncogene protein c fos,Proto-oncogene c-Fos,v fos FBJ murine osteosarcoma viral oncogene homolog
Background: The Fos gene family consists of 4 members: FOS, FOSB, FOSL1, and FOSL2. These genes encode leucine zipper proteins that can dimerize with proteins of the JUN family, thereby forming the transcription factor complex AP-1. As such, the FOS proteins have been implicated as regulators of cell proliferation, differentiation, and transformation. In some cases, expression of the FOS gene has also been associated with apoptotic cell death.