Imperfect reduction of the duplication present in Dp(3;3)Ercc1Xdup, using I-CreI endonuclease. The structure around the mutation site is as follows: SMC2, mutated copy of Ercc1, wild-type copy of Ciao1, 1218bp of extra sequence from the original homologous recombination donor template (which contains a 5' portion of HPS1, the FRT site, the RS(I-CreI) site and a portion of the w gene), HPS1.
Homozygous and Ercc1X/Df(2R)knSA3 larvae are hypersensitive to UV light compared to wild-type. Mutants are also hypersensitive to methyl methanesulfonate. Zygotic Ercc1X mutants show 16% X chromosome nondisjunction and have a reduction in crossing over along the 3rd chromosome. Ercc1X mutants derived from Ercc1X females show 23% X chromosome nondisjunction and have a reduction in crossing over along the 3rd chromosome.
Ercc1X has abnormal meiotic cell cycle phenotype, enhanceable by pch2EY01788a
Ercc1X has phenotype, non-suppressible by mei-9Ubi.Tag:FLAG
The level of X chromosome nondisjunction seen in Ercc1X mutants derived from Ercc1X females is not altered if the flies are also carrying mei-9Ubi.T:Zzzz\FLAG.
Recovered in trans to Df(2R)knSA3.