Neil2 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.
Neil2 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.
Overview
Mermaid diagram (expand to render)
NEIL2 (Nei Endonuclease VIII-Like 2) is a DNA glycosylase that initiates the base excision repair (BER) pathway by recognizing and removing damaged bases from DNA. Unlike other DNA glycosylases, NEIL2 has a unique substrate specificity and is particularly important for repairing oxidative DNA damage in transcribed regions and mitochondrial DNA.
Structure
NEIL2 contains characteristic domains:
Fpg/Nei Domain: Catalytic core with the helix-hairpin-helix (HhH) motif
Iron-Sulfur Cluster Binding Site: 4Fe-4S cluster for structural stability
Proline Insertion: Unique proline-rich insertion that may contribute to substrate specificity
C-terminal Tail: Involved in protein-protein interactions
The active site contains a zinc finger motif important for DNA binding.
Normal Function
Base Excision Repair
NEIL2 removes a broad range of oxidized base lesions:
5-hydroxyuracil (5-OHU)
8-oxoguanine (8-oxoG)
Fapy-guanine (FapyG)
5-hydroxycytosine (5-OHC)
Thymine glycol (Tg)
Transcription-Coupled Repair
Associates with RNA polymerase II during transcription
Prioritizes repair of DNA lesions in actively transcribed genes
Couples transcription to DNA repair (TCR)
Mitochondrial DNA Repair
Translocates to mitochondria
Maintains mitochondrial genome integrity
Protects against mtDNA mutations
Neuronal Protection
Critical for repair of oxidative DNA damage in [neurons](/entities/neurons)
Required for synaptic plasticity and cognitive function
Protects against age-related cognitive decline
Role in Disease
Neurodegeneration
NEIL2 deficiency contributes to:
Accumulation of oxidative DNA damage in neurons
Impaired neurogenesis
Synaptic dysfunction
Cognitive deficits in mouse models
Cancer
Reduced NEIL2 expression in various cancers
Genomic instability and increased mutation burden
Potential biomarker for cancer prognosis
Therapeutic Targeting
Approaches for enhancing NEIL2 function:
Small Molecule Activators: Compounds that enhance NEIL2 activity
Gene Therapy: Viral delivery of NEIL2
Antioxidant Therapy: Reduce oxidative DNA damage burden
Key Publications
Hazra TK, et al. (2002). "Identification and characterization of NEIL2." Proc Natl Acad Sci USA 99(6):3523-3528. PMID: 11904416(https://pubmed.ncbi.nlm.nih.gov/11904416/)
Canugovi C, et al. (2012). "NEIL2 null mouse brain exhibits increased DNA oxidation." Neurobiol Aging 33(12):2813.e1. PMID: 22641087(https://pubmed.ncbi.nlm.nih.gov/22641087/)
Dey S, et al. (2020). "NEIL2 protects against neurodegeneration." DNA Repair 93:102917. PMID: 33002771(https://pubmed.ncbi.nlm.nih.gov/33002771/)
The study of Neil2 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.
External Links
[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
References
References
Pathway Diagram
The following diagram shows the key molecular relationships involving NEIL2 Protein discovered through SciDEX knowledge graph analysis: