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Cited by 527

The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.

Double-Strand Breaks in Heterochromatin Move Outside of a Dynamic HP1a Domain to Complete Recombinational Repair

Open access
Chiolo, Irene, Minoda, Aki, Colmenares, Serafin U., Polyzos, Aris, Costes, Sylvain V., Karpen, Gary H.·2011·Cell

Abstract

SUMMARY Double-strand breaks (DSBs) in heterochromatic repetitive DNAs pose significant threats to genome integrity, but information about how such lesions are processed and repaired is sparse. We observe dramatic expansion and dynamic protrusions of the heterochromatin domain in response to ionizing radiation (IR) in Drosophila cells. We also find that heterochromatic DSBs are repaired by homologous recombination (HR) but with striking differences from euchromatin. Proteins involved in early HR events (resection) are rapidly recruited to DSBs within heterochromatin. In contrast, Rad51, which mediates strand invasion, only associates with DSBs that relocalize outside of the domain. Hetero-chromatin expansion and relocalization of foci require checkpoint and resection proteins. Finally, the Smc5/6 complex is enriched in heterochromatin and is required to exclude Rad51 from the domain and prevent abnormal recombination. We propose that the spatial and temporal control of DSB repair in heterochromatin safeguards genome stability by preventing aberrant exchanges between repeats.

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Metadata

Authors
Chiolo, I., Minoda, A., Colmenares, S. U., Polyzos, A., Costes, S. V., & Karpen, G. H.
Venue
Cell
Publisher
Elsevier BV
Published
2011-03
Volume
144
Issue
5
Pages
732-744
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2070660722
Cited by
527
References
11
FWCI
13.87
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Double-Strand Breaks in Heterochromatin Move Outside of a Dynamic HP1a Domain to Complete Recombinational Repair. https://app.cochat.ai/papers/10.1016/j.cell.2011.02.012
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Chiolo, I., Minoda, A., Colmenares, S. U., Polyzos, A., Costes, S. V., & Karpen, G. H. (2011). Double-Strand Breaks in Heterochromatin Move Outside of a Dynamic HP1a Domain to Complete Recombinational Repair. Cell. https://doi.org/10.1016/j.cell.2011.02.012

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