ArticleCommunications biology2025
Mechanistic insights into alcohol-induced DNA crosslink repair by Slx4-Xpf-Ercc1 nuclease complex in the Fanconi anaemia pathway.
Article in Communications biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Alcohol is broken down in the body into acetaldehyde, a toxic chemical that can damage DNA by creating interstrand crosslinks (AA-ICL). These crosslinks block DNA replication and threaten the stability of the genome. A rare genetic disease, Fanconi anaemia (FA), is marked by extreme sensitivity to DNA crosslinking agents, including acetaldehyde. Although the Fanconi anaemia DNA repair pathway is known to fix this type of damage, exactly how it repairs acetaldehyde crosslinks is not yet understood. Here we show that the FA nuclease Slx4-Xpf-Ercc1 (SXE) plays a key role in the repair of AA-ICL. Using a DNA replication fork with site-specific AA-ICL, we show that SXE specifically excises this crosslink, highlighting its role in the repair of alcohol-induced DNA interstrand crosslinks. Moreover, SXE performs two precise incisions flanking the AA-ICL and can similarly repair a basic-site DNA interstrand crosslink. These results expand our understanding of how the FA pathway resolves alcohol-induced DNA damage. In addition, they suggest that SXE is a versatile nuclease complex and may be involved in repairing other types of crosslinks that may activate the FA pathway.
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