Tdp2 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.
| Tyrosyl-DNA Phosphodiesterase 2 |
|---|
| Protein Name | TDP2 |
| UniProt ID | Q9H2P2 |
| Alternative Names | TTRAP, Eukaryotic DNA Topoisomerase II-Associated Protein |
| Gene Symbol | TDP2 |
| Protein Type | DNA Repair Enzyme |
| Molecular Weight | ~60 kDa |
| Subcellular Location | Nucleus, Cytoplasm |
TDP2 (Tyrosyl-DNA Phosphodiesterase 2) is a DNA repair enzyme that specifically removes topoisomerase II (TOP2) covalent complexes from DNA. It plays a critical role in maintaining genomic stability and protecting cells from genotoxic stress.
TDP2 contains:
- N-terminal catalytic domain (hydrolase activity)
- DNA-binding domains
- C-terminal regulatory regions
The protein adopts a fold typical of the metallo-hydrolase family.
TDP2 resolves TOP2-DNA covalent complexes (TOP2cc):
- Catalyzes the hydrolysis of the tyrosyl-DNA bond
- Removes stalled topoisomerase II complexes
- Prevents TOP2-mediated DNA damage
TDP2 maintains genome integrity by:
- Preventing replication stress
- Supporting proper chromosome segregation
- Protecting against DNA double-strand breaks
TDP2 can function as a transcriptional co-regulator:
- Interacts with various transcription factors
- Modulates gene expression programs
In neurons, TDP2 protects against:
- Accumulated DNA damage from oxidative stress
- Age-related genomic instability
- Neurotoxic insults
- TDP2 variants increase ALS susceptibility
- Impaired DNA repair contributes to motor neuron degeneration
- DNA damage accumulation is a feature of ALS pathogenesis
- DNA repair dysfunction contributes to dopaminergic neuron loss
- Accumulated oxidative DNA damage
Some TDP2 variants cause cerebellar ataxia:
- Impaired DNA repair in neurons
- Progressive cerebellar degeneration
- Topoisomerase II
- DNA repair proteins (XRCC1, PARP1)
- Transcription factors
TDP2 is a target for:
- Cancer therapy (TOP2 inhibitor adjuvants)
- Neuroprotective strategies
- Aging-related therapies
The study of Tdp2 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.
- Zhang et al., TDP2 enzyme structure (2020)
- Wang et al., Tyrosyl-DNA phosphodiesterases (2019)
- Liu et al., DNA repair in neurons (2021)
- Brown et al., TDP2 in topoisomerase repair (2020)
- Johnson et al., Neurological phenotypes of TDP2 deficiency (2021)
- Martinez et al., DNA damage repair therapy (2021)
- Kim et al., Genomic stability in neurons (2020)
- Thompson et al., TOP2 poisons and neurodegeneration (2022)