Fos - FBJ osteosarcoma oncogene

Enables DNA-binding transcription activator activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and chromatin binding activity. Acts upstream of or within several processes, including positive regulation of osteoclast differentiation; response to muscle stretch; and skeletal muscle cell differentiation. Located in endoplasmic reticulum and nucleus. Part of transcription regulator complex. Is expressed in several structures, including alimentary system; brain; early conceptus; genitourinary system; and integumental system. Orthologous to human FOS (Fos proto-oncogene, AP-1 transcription factor subunit). [provided by Alliance of Genome Resources, Apr 2022]