Gene duplication and deletion caused by over-replication at a fork barrier.
Gene duplication and deletion caused by over-replication at a fork barrier.
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DOI:
10.1038/s41467-023-43494-7
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发表时间:
2023-11-25
影响因子:
16.6
通讯作者:
Whitby, Matthew C.
中科院分区:
文献类型:
--
作者:
Oehler, Judith;Morrow, Carl A.;Whitby, Matthew C.
Replication fork stalling can provoke fork reversal to form a four-way DNA junction. This remodelling of the replication fork can facilitate repair, aid bypass of DNA lesions, and enable replication restart, but may also pose a risk of over-replication during fork convergence. We show that replication fork stalling at a site-specific barrier in fission yeast can induce gene duplication-deletion rearrangements that are independent of replication restart-associated template switching and Rad51-dependent multi-invasion. Instead, they resemble targeted gene replacements (TGRs), requiring the DNA annealing activity of Rad52, the 3’-flap nuclease Rad16-Swi10, and mismatch repair protein Msh2. We propose that excess DNA, generated during the merging of a canonical fork with a reversed fork, can be liberated by a nuclease and integrated at an ectopic site via a TGR-like mechanism. This highlights how over-replication at replication termination sites can threaten genome stability in eukaryotes. Gene duplications and deletions are important drivers of evolution and disease. Here, the authors show that excess DNA generated at a replication fork barrier can be integrated at a new genomic site causing both a gene duplication and a deletion.
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影响因子:
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通讯作者:
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影响因子:
16.6
作者:
Kishkevich, Anastasiya;Tamang, Sanjeeta;Nguyen, Michael O.;Oehler, Judith;Bulmaga, Elena;Andreadis, Christos;Morrow, Carl A.;Osman, Fekret;Whitby, Matthew C.
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通讯作者:
Whitby, Matthew C.
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2.6
作者:
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通讯作者:
Lorenz, Alexander