ArticleNucleic acids research2025
Conformational switching of Arp5 subunit regulates INO80 chromatin remodeling.
Article in Nucleic acids research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- The Ies6 subunit is essential for INO80-mediated nucleosome organization.Scientific reports · 2026Article
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7 authors.
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Abstract
The INO80 chromatin remodeler is a versatile enzyme capable of several functions, including spacing nucleosomes equal distances apart, precise positioning of nucleosomes based on DNA shape/sequence and exchanging histone dimers. Within INO80, the Arp5 subunit plays a central role in INO80 remodeling, evidenced by its interactions with the histone octamer, nucleosomal and extranucleosomal DNA, and its necessity in linking INO80's ATPase activity to nucleosome movement. We find two distinct regions of Arp5 binding near the acidic pocket of nucleosomes. One region has an arginine anchor that binds nucleosomes and is vital for INO80 mobilizing nucleosomes. The other region has a hydrophobic/acid patch of Leu and Asp that binds free histone H2A-H2B dimers. These two regions have different roles in remodeling nucleosomes as seen both in vitro and in vivo and the hydrophobic/acidic patch of Arp5 is likely needed for displacing DNA from the H2A-H2B surface and dimer exchange by INO80.
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