Deletion of ATATAC and insertion of a single G, creating a frameshift at codons 374-375 (within the conserved nuclease domain).
mus324ZIII-4325/mus324ZIII-5997 mutants have a similar frequency of single-strand annealing repair (SSA) compared to controls in a P{wIw.FRT} hemizygous assay to study DNA double-stranded break repair when assayed at 38oC, but show a reduced SSA frequency compared to controls when assayed at 32oC.
Mutant larvae are sensitive to nitrogen mustard and to methyl methanesulfonate (compared to control larvae).
GenZ4325, WRNexoΔ has lethal - all die during P-stage phenotype