5j9q
From Proteopedia
Crystal structure of the NuA4 core complex
Structural highlights
FunctionEAF6_YEAST Component of the NuA4 histone acetyltransferase complex which is involved in transcriptional activation of selected genes principally by acetylation of nucleosomal histone H4 and H2A. The NuA4 complex is also involved in DNA repair. Component of the NuA3 histone acetyltransferase complex, that acetylates Lys-14 of histone H3. Recruitment of NuA3 to nucleosomes requires methylated histone H3. In conjunction with the FACT complex, NuA3 may be involved in transcriptional regulation.[1] Publication Abstract from PubMedNuA4 catalyzes the acetylation of nucleosomes at histone H4, which is a well-established epigenetic event, controlling many genomic processes in Saccharomyces cerevisiae. Here we report the crystal structures of the NuA4 core complex and a cryoelectron microscopy structure with the nucleosome. The structures show that the histone-binding pocket of the enzyme is rearranged, suggesting its activation. The enzyme binds the histone tail mainly through the target lysine residue, with a preference for a small residue at the -1 position. The complex engages the nucleosome at the dish face and orients its catalytic pocket close to the H4 tail to achieve selective acetylation. The combined data reveal a space-sequence double recognition mechanism of the histone tails by a modifying enzyme in the context of the nucleosome. The NuA4 Core Complex Acetylates Nucleosomal Histone H4 through a Double Recognition Mechanism.,Xu P, Li C, Chen Z, Jiang S, Fan S, Wang J, Dai J, Zhu P, Chen Z Mol Cell. 2016 Sep 15;63(6):965-75. doi: 10.1016/j.molcel.2016.07.024. Epub 2016 , Sep 1. PMID:27594449[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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