ArticleEpigenetics & chromatin2023
The SAGA histone acetyltransferase module targets SMC5/6 to specific genes.
Article in Epigenetics & chromatin, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- The genome in space and time comes of age.Nucleus (Austin, Tex.) · 2024Article
- DNA double-strand break movement in heterochromatin depends on the histone acetyltransferase dGcn5.Nucleic acids research · 2024Article
- Human Smc5/6 recognises transcription-generated positive DNA supercoils.Nature communications · 2024Article
- NSE5 subunit interacts with distant regions of the SMC arms in the Physcomitrium patens SMC5/6 complex.The Plant journal : for cell and molecular biology · 2024Article
- The multi-functional Smc5/6 complex in genome protection and disease.Nature structural & molecular biology · 2023Review
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Authors and funding
10 authors at 4 institutions in 2 countries.
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Abstract
backgroundStructural Maintenance of Chromosomes (SMC) complexes are molecular machines driving chromatin organization at higher levels. In eukaryotes, three SMC complexes (cohesin, condensin and SMC5/6) play key roles in cohesion, condensation, replication, transcription and DNA repair. Their physical binding to DNA requires accessible chromatin.
resultsWe performed a genetic screen in fission yeast to identify novel factors required for SMC5/6 binding to DNA. We identified 79 genes of which histone acetyltransferases (HATs) were the most represented. Genetic and phenotypic analyses suggested a particularly strong functional relationship between the SMC5/6 and SAGA complexes. Furthermore, several SMC5/6 subunits physically interacted with SAGA HAT module components Gcn5 and Ada2. As Gcn5-dependent acetylation facilitates the accessibility of chromatin to DNA-repair proteins, we first analysed the formation of DNA-damage-induced SMC5/6 foci in the Δgcn5 mutant. The SMC5/6 foci formed normally in Δgcn5, suggesting SAGA-independent SMC5/6 localization to DNA-damaged sites. Next, we used Nse4-FLAG chromatin-immunoprecipitation (ChIP-seq) analysis in unchallenged cells to assess SMC5/6 distribution. A significant portion of SMC5/6 accumulated within gene regions in wild-type cells, which was reduced in Δgcn5 and Δada2 mutants. The drop in SMC5/6 levels was also observed in gcn5-E191Q acetyltransferase-dead mutant.
conclusionOur data show genetic and physical interactions between SMC5/6 and SAGA complexes. The ChIP-seq analysis suggests that SAGA HAT module targets SMC5/6 to specific gene regions and facilitates their accessibility for SMC5/6 loading.
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