6JPQ

CryoEM structure of Abo1 hexamer - ADP complex

• PDB DOI:  https://doi.org/10.2210/pdb6JPQ/pdb
• EM Map EMD-9870: EMDB EMDataResource

• Classification: CHAPERONE
• Organism(s): Schizosaccharomyces pombe 972h-
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2019-03-27 Released: 2020-08-19 
• Deposition Author(s): Cho, C., Jang, J., Song, J.J.
• Funding Organization(s): National Research Foundation (NRF, Korea)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.44 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

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

• PubMed: 31848341 
• 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.

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Organizational Affiliation: 

Department of Biological Sciences and KI for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C6  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 817.36 kDa 
• Atom Count: 27,768 
• Modelled Residue Count: 3,462 
• Deposited Residue Count: 7,188 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Uncharacterized AAA domain-containing protein C31G5.19	A, B, C, D, E, F	1,198	Schizosaccharomyces pombe 972h-	Mutation(s): 0  Gene Names: SPAC31G5.19, abo1 EC: 3.6.1
UniProt
Find proteins for O14114 (Schizosaccharomyces pombe (strain 972 / ATCC 24843)) Explore O14114  Go to UniProtKB:  O14114

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.44 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-08-19 
Deposition Author(s): Cho, C., Jang, J., Song, J.J.

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Funding Organization	Location	Grant Number
National Research Foundation (NRF, Korea)	Korea, Republic Of	2016R1A2B3006293
National Research Foundation (NRF, Korea)	Korea, Republic Of	2016K1A1A2912057
National Research Foundation (NRF, Korea)	Korea, Republic Of	2018R1A6A7052113
National Research Foundation (NRF, Korea)	Korea, Republic Of	NRF-2015H1D3A1066116
National Research Foundation (NRF, Korea)	Korea, Republic Of	NRF-2018R1D1A1B07047345

Revision History  

• Version 1.0: 2020-08-19
  Type: Initial release