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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Isolation of the functional human excision repair gene ERCC5 by intercosmid recombination.

The complete human nucleotide exicision repair gene ERCC5 was isolated as a functional gene on overlapping cosmids. ERCC5 corrects the excision repair deficiency of Chinese hamster ovary cell line UV135, of complementation group 5. Cosmids that contained human sequences were obtained from a UV-resistant cell line derived from UV135 cells transformed with human genomic DNA. Individually, none of the cosmids complemented the UV135 repair defect; cosmid groups were formed to represent putative human genomic regions, and specific pairs of cosmids that effectively transformed UV135 cells to UV resistance were identified. Analysis of transformants derived from the active cosmid pairs showed that the functional 32-kbp ERCC5 gene was reconstructed by homologous intercosmid recombination. The cloned human sequences exhibited 100% concordance with the locus designated genetically as ERCC5 located on human chromosome 13q. Cosmid-transformed UV135 host cells repaired cytotoxic damage to levels about 70% of normal and repaired UV-irradiated shuttle vector DNA to levels about 82% of normal.[1]


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