Poln 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.
POLN (DNA Polymerase Nu) is the most recently characterized member of the X-family DNA polymerases. While its precise cellular functions are still being elucidated, Pol ν appears to play specialized roles in certain DNA repair pathways. [1]
| Attribute | Value |
|---|---|
| Gene | POLN |
| Protein Name | DNA Polymerase Nu |
| UniProt | Q8IY92 |
| Molecular Weight | ~42 kDa |
| Length | 369 amino acids |
| Cellular Localization | Nucleus |
| Protein Family | X-family DNA polymerases |
Pol ν contains:
Pol ν has unique biochemical characteristics:
Research suggests Pol ν may participate in:
POLN (DNA Polymerase Nu) is the most recently characterized member of the X-family DNA polymerases. While its precise cellular functions are still being elucidated, Pol ν appears to play specialized roles in certain DNA repair pathways and may contribute to neuronal genome maintenance under conditions of oxidative stress and metabolic challenge. [1:1]
POLN overexpression in cancers correlates with homologous recombination deficiency and may provide replication stress tolerance, representing a potential therapeutic target. [1:2]
POLN may play a role in the repair of oxidative DNA damage in neurons, a process critical for maintaining genomic integrity in post-mitotic cells. Reduced POLN expression could contribute to the accumulation of DNA lesions observed in Alzheimer's disease. [2]
Neurons in the substantia nigra are particularly vulnerable to genotoxic stress. POLN-mediated DNA repair pathways may help protect dopaminergic neurons from the oxidative and metabolic stress characteristic of Parkinson's disease. [1:3]
Motor neurons face significant metabolic and oxidative challenges. POLN's role in maintaining genome stability could be relevant to ALS pathogenesis, where DNA damage response pathways are increasingly recognized as important. [1:4]
DNA polymerase nu in genome stability (2019). 2019. ↩︎ ↩︎ ↩︎ ↩︎ ↩︎
POLN characterization (2020). 2020. ↩︎