The unresolved problem of DNA bridging

Fernández-Casañas, Maria and Chan, Kok-Lung (2018) The unresolved problem of DNA bridging. Genes, 9 (12). a623 1-16. ISSN 2073-4425

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Accurate duplication and transmission of identical genetic information into offspring cells lies at the heart of a cell division cycle. During the last stage of cellular division, namely mitosis, the fully replicated DNA molecules are condensed into X-shaped chromosomes, followed by a chromosome separation process called sister chromatid disjunction. This process allows for the equal partition of genetic material into two newly born daughter cells. However, emerging evidence has shown that faithful chromosome segregation is challenged by the presence of persistent DNA intertwining structures generated during DNA replication and repair, which manifest as so-called ultra-fine DNA bridges (UFBs) during anaphase. Undoubtedly, failure to disentangle DNA linkages poses a severe threat to mitosis and genome integrity. This review will summarize the possible causes of DNA bridges, particularly sister DNA inter-linkage structures, in an attempt to explain how they may be processed and how they influence faithful chromosome segregation and the maintenance of genome stability.

Item Type: Article
Keywords: Bloom’s syndrome complex, PICH/ERCC6L, Ultra-fine DNA bridges, chromosome segregation, sister chromatid disjunction
Schools and Departments: School of Life Sciences > Sussex Centre for Genome Damage and Stability
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 12 May 2021 09:41
Last Modified: 18 Feb 2022 15:06

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Project NameSussex Project NumberFunderFunder Ref
Elucidating the mechanisms of centromere protection and disjunction in genome stability maintenanceG2743WELLCOME TRUST104178/Z/14/A
Molecular basis of inheritable DNA lesions on genome transformationG1408WELLCOME TRUST104178/Z/14/Z