8HAM

Cryo-EM structure of the CBP catalytic core bound to the H4K12acK16ac nucleosome, class 2

Summary for 8HAM

• Entry DOI: 10.2210/pdb8ham/pdb
• EMDB information: 34596
• Descriptor: Histone H3.1, Histone H4, Histone H2A type 1-B/E, ... (6 entities in total)
• Functional Keywords: acetyl taransferase, complex, nucleosome, transferase, transferase-dna complex, transferase/dna
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 11
• Total formula weight: 312791.28

Authors

Kikuchi, M.,Morita, S.,Wakamori, M.,Shin, S.,Uchikubo-Kamo, T.,Shirouzu, M.,Umehara, T. (deposition date: 2022-10-26, release date: 2023-05-17, Last modification date: 2024-10-16)

Primary citation

Kikuchi, M.,Morita, S.,Wakamori, M.,Sato, S.,Uchikubo-Kamo, T.,Suzuki, T.,Dohmae, N.,Shirouzu, M.,Umehara, T.
Epigenetic mechanisms to propagate histone acetylation by p300/CBP.
Nat Commun, 14:4103-4103, 2023

PubMed Abstract: Histone acetylation is important for the activation of gene transcription but little is known about its direct read/write mechanisms. Here, we report cryogenic electron microscopy structures in which a p300/CREB-binding protein (CBP) multidomain monomer recognizes histone H4 N-terminal tail (NT) acetylation (ac) in a nucleosome and acetylates non-H4 histone NTs within the same nucleosome. p300/CBP not only recognized H4NTac via the bromodomain pocket responsible for reading, but also interacted with the DNA minor grooves via the outside of that pocket. This directed the catalytic center of p300/CBP to one of the non-H4 histone NTs. The primary target that p300 writes by reading H4NTac was H2BNT, and H2BNTac promoted H2A-H2B dissociation from the nucleosome. We propose a model in which p300/CBP replicates histone N-terminal tail acetylation within the H3-H4 tetramer to inherit epigenetic storage, and transcribes it from the H3-H4 tetramer to the H2B-H2A dimers to activate context-dependent gene transcription through local nucleosome destabilization.

PubMed: 37460559
DOI: 10.1038/s41467-023-39735-4

Experimental method

ELECTRON MICROSCOPY (4.5 Å)