Ercc4 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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{{- infobox
| name = ERCC4
| image =
| caption = DNA repair endonuclease XPF
| gene_symbol = ERCC4
| gene_name = ERCC excision repair 4, endonuclease
| chromosome = 16
| locus = 16p13.12
| ncbi_gene_id = 2072
| omim_id = 133520
| ensembl_id = ENSG00000175595
| uniprot_id = Q92889
| encoded_protein = ERCC4 Protein
}}
The ERCC4 gene (also known as XPF) encodes a structure-specific endonuclease critical for nucleotide excision repair (NER). This enzyme makes the incision 5' to the DNA lesion during NER, excising a wide variety of bulky DNA adducts including UV-induced pyrimidine dimers. ERCC4 mutations cause xeroderma pigmentosum (XP-F group) and Fanconi anemia, with severe consequences for genomic stability and neurodegeneration.
ERCC4 (XPF) forms a heterodimer with ERCC1 (XPF-ERCC1 complex) that functions as:
- Recognizes and cleaves DNA at junctions between single-stranded and double-stranded regions
- Makes 5' incisions at DNA damage sites during NER
- Essential for cleaving the damaged DNA strand during lesion removal
- Part of the core NER machinery
- Works downstream of lesion recognition and DNA unwinding
- Incises damaged DNA strand 5' to the lesion
- Critical for removing UV-induced pyrimidine dimers, chemical adducts, and crosslinks
- Interstrand crosslink repair (with Fanconi anemia pathway)
- Mismatch repair (later steps)
- Telomere maintenance
- ERCC4 mutations cause XP complementation group F
- Extreme photosensitivity
- 10,000-fold increased skin cancer risk
- Variable neurological degeneration
- ERCC4 is a Fanconi anemia complementation group gene (FANCQ)
- Chromosomal instability
- Congenital abnormalities
- Bone marrow failure
- Cancer predisposition
- XP patients develop:
- Progressive neurodegeneration
- Ataxia
- Cognitive decline
- Hearing loss
- Accumulated DNA damage in neurons
- Impaired transcription-coupled repair
- Extreme skin cancer risk (basal cell carcinoma, squamous cell carcinoma, melanoma)
- Increased internal malignancies
ERCC4 is expressed in most tissues:
- Highest in:
- Testis
- Ovary
- Bone marrow
- Skin
- Moderate expression in:
- Brain (neurons and astrocytes)
- Liver
- Kidney
In neurons, ERCC4 is important for:
- Removing transcription-blocking lesions
- Maintaining genomic integrity
- Supporting long-term neuronal survival
- Viral vector delivery of functional ERCC4
- CRISPR-based gene correction
- DNA repair enhancers
- Antioxidants (reduce oxidative DNA damage)
- Neuroprotective strategies
- Topical DNA repair enzymes for skin protection
The study of Ercc4 Gene 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.
- Scharer OD. (2008). Nucleotide excision repair in eukaryotes. Cold Spring Harbor Perspectives in Biology, 5(10), a012609. PMID: 24043689
- Sijbers AM, et al. (1996). Mutagenesis and functional analysis of the human DNA repair endonuclease XPF-ERCC1. Nucleic Acids Research, 24(21), 4217-4224. PMID: 8932369
- Arora S, et al. (2017). Role of nucleotide excision repair in glioma survival and response to therapy. Oncogenesis, 6(11), e392. PMID: 29147010
- Gregg SQ, et al. (2011). A mouse model of XPF-ERCC1 deficiency: phenotypic comparison with human XP-F patients. Nature Genetics, 43(7), 672-676. PMID: 21643471
- Kuraoka I, et al. (2000). Repair of an interstrand DNA cross-link in a mammalian cell. Journal of Biological Chemistry, 275(34), 26632-26636. PMID: 10842166
- McNeil EM, et al. (2015). Inhibition of the ERCC1-XPF structure-specific endonuclease to sensitize cancer cells to platinum agents. ChemMedChem, 10(2), 233-241. PMID: 25469843
- Niedernhofer LJ, et al. (2006). The nucleotide excision repair protein XPF:ERCC1: structure, function, and role in neurological disease. DNA Repair, 5(7), 809-817. PMID: 16784900
- Wood RD. (2010). Nucleotide excision repair in mammalian cells. Journal of Molecular Medicine, 88(9), 899-908. PMID: 20535456