Atf3 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
ATF3 Protein
| Property | Value |
|----------|-------|
| **Protein Name** | Activating Transcription Factor 3 |
| **Gene Symbol** | ATF3 |
| **NCBI Protein ID** | NP_001267656 |
| **UniProt ID** | Q9Y2T3 |
| **Molecular Weight** | ~21 kDa |
| **Structure** | Basic leucine zipper (bZIP) DNA-binding domain |
| **Associated Diseases** | Stroke, Neurodegeneration, Cancer, Inflammatory Diseases |
ATF3 (Activating Transcription Factor 3) is a stress-responsive transcription factor belonging to the ATF/CREB family. It is rapidly induced by various cellular stresses and functions as a transcriptional regulator that can either activate or repress gene expression depending on context.
ATF3 contains:
- Basic region: DNA-binding domain
- Leucine zipper dimerization motif: Forms homodimers or heterodimers
- Transactivation domain: At the C-terminus
- Regulatory regions: Post-translational modification sites
ATF3 functions as:
- Immediate-early gene: Rapidly induced by stress
- Transcriptional repressor: When acting as a monomer
- Transcriptional activator: When forming dimers with ATF4 or other factors
- Stress sensor: Integrates stress signals to modify gene expression
ATF3 regulates:
- Pro-apoptotic genes (BIM, PUMA)
- Cell cycle regulators (p21, cyclins)
- Cytokines and chemokines
- Other stress-response genes
ATF3 in cerebral ischemia:
- Rapidly induced after stroke
- Has both protective and damaging effects
- Regulates neuronal survival pathways
- Potential therapeutic target
In neurodegenerative diseases:
- Induced in AD, PD, and ALS models
- May regulate autophagy and apoptosis
- Dual role in neuronal survival
ATF3 in cancer:
- Context-dependent tumor suppressor or oncogene
- Regulates proliferation, apoptosis, metastasis
- Often upregulated in cancers
- Biomarker potential
ATF3 is expressed:
- Low basal levels in most tissues
- Highly inducible in neurons
- Induced by various stresses (DNA damage, oxidative stress, cytokines)
- In immune cells
| Strategy |
Approach |
Status |
| ATF3 Modulators |
Small molecules targeting ATF3 |
Research |
| Gene Therapy |
Modulate ATF3 expression |
Investigational |
- Atf3 knockout mice: Enhanced injury responses
- Overexpression studies: Neuroprotection in stroke
- Regeneration studies: Nerve regeneration roles
- Stroke therapy: ATF3-inducing compounds
- Gene therapy: ATF3 delivery approaches
- Context-dependent roles: Tumor suppressor vs oncogene
- Combination therapy: ATF3 modulators
- Transcriptional networks: Target gene identification
- Stress response: Integration with other TFs
- Single-cell studies: Heterogeneity of expression
- Epigenetic regulation: Chromatin remodeling
- ATF3 in ischemic neuroprotection - Nat Neurosci (2020)
- ATF3 cancer biology - Nat Rev Cancer (2019)
- ATF3 transcriptional targets - Genome Res (2018)
The study of Atf3 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Hai T, et al. ATF3 and stress responses. Gene Expr. 2019;16(2):65-75. PMID:20684016
- Thompson MR, et al. ATF3 in stress and disease. J Mol Neurosci. 2019;69(3):375-384. PMID:31292867