ERCC1 is a subunit of the DNA structure-specific endonuclease XPF-ERCC1, which incises a damaged DNA strand on the 5' side of a lesion during nucleotide excision repair. It also plays roles in DNA interstrand crosslink repair and homologous recombination. The ERCC1 central domain modeled here interacts tightly with XPF and may be involved in binding to single-stranded DNA. It belongs to a superfamily of nucleases including very short patch repair (Vsr) endonucleases, archaeal Holliday junction resolvases, MutH methyl-directed DNA mismatch-repair endonucleases, and catalytic domains of many restriction endonucleases, such as EcoRI, BamHI, and FokI.
Jiyao W et al.(2023). "The conserved domain database in 2023.",