CryoEM structure of Abo1 Walker B (E372Q) mutant hexamer - ATP complex

Experimental Data Snapshot

  • Resolution: 3.54 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Structural basis of nucleosome assembly by the Abo1 AAA+ ATPase histone chaperone.

Cho, C.Jang, J.Kang, Y.Watanabe, H.Uchihashi, T.Kim, S.J.Kato, K.Lee, J.Y.Song, J.J.

(2019) Nat Commun 10: 5764-5764

  • DOI: https://doi.org/10.1038/s41467-019-13743-9
  • Primary Citation of Related Structures:  
    6JPQ, 6JPU, 6JQ0

  • PubMed Abstract: 

    The fundamental unit of chromatin, the nucleosome, is an intricate structure that requires histone chaperones for assembly. ATAD2 AAA+ ATPases are a family of histone chaperones that regulate nucleosome density and chromatin dynamics. Here, we demonstrate that the fission yeast ATAD2 homolog, Abo1, deposits histone H3-H4 onto DNA in an ATP-hydrolysis-dependent manner by in vitro reconstitution and single-tethered DNA curtain assays. We present cryo-EM structures of an ATAD2 family ATPase to atomic resolution in three different nucleotide states, revealing unique structural features required for histone loading on DNA, and directly visualize the transitions of Abo1 from an asymmetric spiral (ATP-state) to a symmetric ring (ADP- and apo-states) using high-speed atomic force microscopy (HS-AFM). Furthermore, we find that the acidic pore of ATP-Abo1 binds a peptide substrate which is suggestive of a histone tail. Based on these results, we propose a model whereby Abo1 facilitates H3-H4 loading by utilizing ATP.

  • Organizational Affiliation

    Department of Biological Sciences and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. carol.cho@kaist.ac.kr.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Uncharacterized AAA domain-containing protein C31G5.19
A, B, C, D, E
A, B, C, D, E, F
1,198Schizosaccharomyces pombe 972h-Mutation(s): 1 
Gene Names: SPAC31G5.19
Find proteins for O14114 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O14114 
Go to UniProtKB:  O14114
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14114
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
unknown substrate14Spodoptera frugiperdaMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.54 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic Of2016R1A2B3006293
National Research Foundation (Korea)Korea, Republic Of2016K1A1A2912057
National Research Foundation (Korea)Korea, Republic Of2018R1A6A7052113
National Research Foundation (Korea)Korea, Republic OfNRF-2015H1D3A1066116
National Research Foundation (Korea)Korea, Republic OfNRF-2018R1D1A1B07047345

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-25
    Type: Initial release
  • Version 1.1: 2020-01-01
    Changes: Database references