Fos Gene Summary [Mouse]

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. Involved in positive regulation of transcription by RNA polymerase II. 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 factor AP-1 complex. Is expressed in several structures, including alimentary system; central nervous system; early conceptus; genitourinary system; and limb. Orthologous to human FOS (Fos proto-oncogene, AP-1 transcription factor subunit). [provided by Alliance of Genome Resources, Jul 2025]

Details

Type
Protein Coding
Official Symbol
Fos
Official Name
FBJ osteosarcoma oncogene [Source:MGI Symbol;Acc:MGI:95574]
Ensembl ID
ENSMUSG00000021250
Bio databases IDs NCBI: 14281 Ensembl: ENSMUSG00000021250
Aliases FBJ osteosarcoma oncogene
Synonyms AP-1, C-FOS, D12Rfj1, FBJ osteosarcoma oncogene, Fos proto-oncogene, AP-1 transcription factor subunit, p55
Species
Mouse, Mus musculus
OrthologiesHumanRat

Protein Domains

A protein domain is a distinct structural or functional region within a protein that can evolve, function, and exist independently of the rest of the protein chain. These domains in mouse Fos often fold into stable, three-dimensional structures and are associated with specific biological functions, such as binding to DNA, other proteins, or small molecules.
  • SMAD binding
  • transcription regulator
  • transcription activation domain
  • transcription factor binding
  • leucine zipper domain
  • chromatin binding
  • identical protein binding
  • bZIP domain
  • RNA polymerase II transcription factor activity, sequence-specific DNA binding
  • homologue box 2 motif
  • serine phosphorylation site
  • carboxy-terminal activation region
  • basic domain
  • bZIP
  • RNA polymerase II transcription regulatory region sequence-specific binding transcriptional activator activity
  • dimerization domain
  • transcription factor binding domain
  • DNA binding domain
  • nucleic acid binding
  • Basic region leucine zipper
  • protein binding
  • sequence-specific DNA binding
  • DNA binding
  • PEST domain
  • binding protein
  • double-stranded DNA binding
  • transcription factor activity
  • basic region leucin zipper

Top Findings

The most significant associations for this gene, including commonly observed domains, pathway involvement, and functional highlights based on current data.
binds
disease
  • breast cancer
  • ovarian cancer
  • uterine cancer
  • neoplasia
  • liver cancer
  • cancer
  • epithelial cancer
  • epithelial neoplasia
  • colorectal cancer
  • bleeding
regulated by
regulates
role in cell
  • proliferation
  • expression in
  • maturation
  • invasion by
  • migration
  • production in
  • quantity
  • apoptosis
  • survival
  • number

Subcellular Expression

Locations within the cell where the protein is known or predicted to be active, providing insight into its function and cellular context.
  • Nucleus
  • nuclear fraction
  • Cytoplasm
  • perinuclear region
  • Endoplasmic Reticulum
  • cytosol
  • nucleoplasm
  • nuclear rim
  • nuclear matrix
  • clastosomes
  • chromatin
  • perikaryon

Gene Ontology Annotations

Describes the biological processes, cellular components, and molecular functions associated with the mouse Fos gene, providing context for its role in the cell.

Biological Process

Functions and activities the gene product is involved in
  • response to progesterone stimulus
  • nervous system development
  • transforming growth factor beta receptor signaling pathway
  • response to cAMP
  • transcription from RNA polymerase II promoter
  • response to xenobiotic stimulus
  • positive regulation of transcription from RNA polymerase II promoter
  • response to toxin
  • response to light stimulus
  • response to gravity
  • response to ethanol
  • inflammatory response
  • response to insulin stimulus
  • cellular response to calcium ion
  • positive regulation of osteoclast differentiation
  • skeletal muscle cell differentiation
  • positive regulation of transcription, DNA-dependent
  • cellular response to parathyroid hormone stimulus
  • cellular response to cadmium ion
  • cellular response to tumor necrosis factor
  • cellular response to zinc ion starvation
  • skeletal muscle cell proliferation
  • cellular response to hypoxia
  • response to muscle stretch
  • SMAD protein signal transduction
  • female pregnancy
  • conditioned taste aversion
  • regulation of transcription from RNA polymerase II promoter
  • osteoclast differentiation
  • response to corticosterone stimulus
  • cellular response to epidermal growth factor stimulus
  • myoblast proliferation
  • response to lipopolysaccharide
  • response to immobilization stress
  • response to activity
  • cellular response to reactive oxygen species

Cellular Component

Where in the cell the gene product is active
  • nucleus
  • protein-DNA complex
  • AP1 complex
  • cytosol
  • endoplasmic reticulum
  • chromatin
  • nucleoplasm

Molecular Function

What the gene product does at the molecular level
  • transcription cofactor binding
  • sequence-specific DNA binding transcription factor activity
  • identical protein binding
  • protein binding
  • RNA polymerase II core promoter sequence-specific DNA binding
  • RNA polymerase II core promoter proximal region sequence-specific DNA binding
  • R-SMAD binding
  • transcription regulatory region sequence-specific DNA binding
  • RNA polymerase II transcription regulatory region sequence-specific DNA binding transcription factor activity involved in positive regulation of transcription
  • chromatin binding
  • sequence-specific DNA binding RNA polymerase II transcription factor activity

Gene-Specific Assays for Results You Can Trust

Streamline your workflow with assays designed for this gene. Our targeted dPCR and qPCR assays help you generate meaningful data – efficiently and accurately.