ArticleResearch square2023
New insights into the mechanism and DNA-sequence specificity of INO80 chromatin remodeling.
Article in Research square, 2023. 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
The INO80 complex stood out in a large family of ATP-dependent chromatin remodelers because of its ATPase domain binding and translocating on DNA at the edge of nucleosomes, rather than at two helical turns from the center of DNA that is wrapped around nucleosomes. This unique property of INO80 was thought to account for its singular role in nucleosome placement at gene promoters in a DNA-sequence dependent manner that is crucial for transcription regulation. Now, we uncover INO80 functions differently than previously thought with its ATPase domain translocating on DNA close to the center of nucleosomes, like other remodelers. Our discovery also reveals the physical properties of the first ~36 bp of DNA on the entry side of nucleosomes is the main determinant for the DNA specificity of INO80 rather than the properties of the extranucleosomal DNA. The DNA sequence sensitive step of INO80 is after DNA is displaced from the histone octamer on the entry side of nucleosomes and 20 bp of DNA are moved out the exit side. We find the ATPase domain and Arp5 subunit of INO80 are likely involved in INO80's DNA specificity and the mechanism of INO80 remodeling is substantially different than originally proposed.
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Registered trials
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