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. [provided by RefSeq, Jul 2008]
Molecular Weight(MW)
41 kDa(Observed band size: 62 kDa)
Function
FBJ murine osteosarcoma viral oncogene homolog is commonly known as Cellular protooncogene Fos (c-Fos). It belongs to the fos transcription factor family and is encoded by the C-FOS gene located on chromosome 14. c-Fos heterodimerizes with c-Jun to form the Activator Protein -1 (AP-1) transcription factor which regulates transcription of several genes that play an important role in cellular signal transduction, cell proliferation and differentiation. c-Fos has been shown to be phosphorylated by various stimuli including growth factors and insulin at atleast seven different sites. The best known upstream kinase for phosphorylation at Threonine 232 is ERK MAPK which regulates localization of c-Fos to the nucleus and is thus important for c-Fos induced transcriptional activity.
Cellular Localization
Cytoplasm,Endoplasmic reticulum,Nucleus
Application
WB
Western blot analysis of Mouse brain and Rat brain lysates using c-Fos Goat pAb
IF
Immunofluorescence analysis of Mouse brain tissue using c-Fos Goat pAb