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Here, we show that a DNA double-strand break (DSB) induced near natural short, inverted repeats drives high frequency inverted duplication in Sae2 and Mre11-deficient cells. We find that DNA polymerase \u03b4 proof-reading activity acts non-redundantly with Rad1 nuclease to remove heterologous tails formed during foldback annealing. Additionally, Pol32 is required for the generation of inverted duplications, suggesting that Pol \u03b4 catalyzes fill-in synthesis primed from the foldback to create a hairpin-capped chromosome that is subsequently replicated to form a dicentric isochromosome. Stabilization of the dicentric chromosome after breakage involves telomere capture by non-reciprocal translocation mediated by repeat sequences and requires Rad51.<\/jats:p>","DOI":"10.1101\/2023.01.24.525421","type":"posted-content","created":{"date-parts":[[2023,1,25]],"date-time":"2023-01-25T11:45:27Z","timestamp":1674647127000},"source":"Crossref","is-referenced-by-count":1,"title":["Double-strand breaks induce inverted duplication chromosome rearrangements by a DNA polymerase \u03b4 and Rad51-dependent mechanism"],"prefix":"10.64898","author":[{"given":"Amr","family":"Al-Zain","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mattie R.","family":"Nester","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1519-4800","authenticated-orcid":false,"given":"Lorraine S.","family":"Symington","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"54368","reference":[{"key":"2023012705350581000_2023.01.24.525421v1.1","doi-asserted-by":"publisher","DOI":"10.1534\/genetics.112.145805"},{"key":"2023012705350581000_2023.01.24.525421v1.2","doi-asserted-by":"publisher","DOI":"10.1038\/35082608"},{"key":"2023012705350581000_2023.01.24.525421v1.3","doi-asserted-by":"publisher","DOI":"10.1038\/12687"},{"key":"2023012705350581000_2023.01.24.525421v1.4","doi-asserted-by":"publisher","DOI":"10.1038\/nature08217"},{"key":"2023012705350581000_2023.01.24.525421v1.5","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pgen.1004277"},{"key":"2023012705350581000_2023.01.24.525421v1.6","doi-asserted-by":"publisher","DOI":"10.1016\/j.molcel.2015.09.027"},{"key":"2023012705350581000_2023.01.24.525421v1.7","doi-asserted-by":"crossref","unstructured":"Li BZ , Putnam CD , Kolodner RD . 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