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Cited by 1,051

The DOI matches its Crossref record; 70 of the 70 references it cites were found in a registry or an index.

Sgs1 Helicase and Two Nucleases Dna2 and Exo1 Resect DNA Double-Strand Break Ends

Open access
Zhu, Zhu, Chung, Woo-Hyun, Shim, Eun Yong, Lee, Sang Eun, Ira, Grzegorz·2008·Cell

Abstract

Summary Formation of single-strand DNA (ssDNA) tails at a double-strand break (DSB) is a key step in homologous recombination and DNA damage signaling. The enzyme(s) producing ssDNA at DSBs in eukaryotes remains unknown. We monitored 5’-strand resection at inducible DSB ends and identified proteins required for two stages of resection: initiation and long-range 5’-strand resection. The Mre11-Rad50-Xrs2 complex (MRX) initiates 5’ degradation, whereas Sgs1 and Dna2 degrade 5’-strands exposing long 3’-strands at 4.4 kb/h rate. Deletion of SGS1 or DNA2 reduces resection and DSB repair by single strand annealing between distant repeats. Resection in the absence of SGS1 or DNA2 depends on Exo1. In exo1Δ sgs1Δ mutants the MRX complex and Sae2 in a stepwise manner generate only few hundred nucleotides of ssDNA at the break resulting in inefficient gene conversion and G2/M damage checkpoint arrest. We provide the first comprehensive model of the early steps of DSB repair in eukaryotes.

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Metadata

Authors
Zhu, Z., Chung, W.-H., Shim, E. Y., Lee, S. E., & Ira, G.
Venue
Cell
Publisher
Elsevier BV
Published
2008-09
Volume
134
Issue
6
Pages
981-994
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2094020226
Cited by
1,051
References
70
FWCI
30.03
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Sgs1 Helicase and Two Nucleases Dna2 and Exo1 Resect DNA Double-Strand Break Ends. https://app.cochat.ai/papers/10.1016/j.cell.2008.08.037
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Zhu, Z., Chung, W.-H., Shim, E. Y., Lee, S. E., & Ira, G. (2008). Sgs1 Helicase and Two Nucleases Dna2 and Exo1 Resect DNA Double-Strand Break Ends. Cell. https://doi.org/10.1016/j.cell.2008.08.037

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