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Science. 2001 Dec 21;294(5551):2552-6. Epub 2001 Nov 8.

A DNA microarray-based genetic screen for nonhomologous end-joining mutants in Saccharomyces cerevisiae.

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  • 1Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, 617 Hunterian Building, 725 North Wolfe Street, Baltimore, MD 21205, USA.


We describe a microarray-based screen performed by imposing different genetic selections on thousands of yeast mutants in parallel, representing most genes in the yeast genome. The presence or absence of mutants was detected by oligonucleotide arrays that hybridize to 20-nucleotide "barcodes." We used this method to screen for components of the nonhomologous end-joining (NHEJ) pathway. Known components of the pathway were identified, as well as a gene not previously known to be involved in NHEJ, NEJ1. Nej1 protein interacts with the amino terminus of LIF1/XRCC4, a recently recognized "guardian of the genome" against cancer.

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