Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 70.22 kDa 
• Atom Count: 4617 
• Modelled Residue Count: 569 
• Deposited Residue Count: 608 
• Unique protein chains: 2

3AAD

Structure of the histone chaperone CIA/ASF1-double bromodomain complex linking histone modifications and site-specific histone eviction

• DOI: 10.2210/pdb3AAD/pdb

• Classification: TRANSCRIPTION/CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2009-11-16 Released: 2010-04-28 
• Deposition Author(s): Akai, Y., Adachi, N., Hayashi, Y., Eitoku, M., Sano, N., Natsume, R., Kudo, N., Tanokura, M., Senda, T., Horikoshi, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.293 
• R-Value Work: 0.237 
• R-Value Observed: 0.240 

Literature

Structure of the histone chaperone CIA/ASF1-double bromodomain complex linking histone modifications and site-specific histone eviction

Akai, Y., Adachi, N., Hayashi, Y., Eitoku, M., Sano, N., Natsume, R., Kudo, N., Tanokura, M., Senda, T., Horikoshi, M.

(2010) Proc Natl Acad Sci U S A 107: 8153-8158

• PubMed: 20393127 
• DOI: 10.1073/pnas.0912509107
• Primary Citation of Related Structures:  
  3AAD


• PubMed Abstract: 
  

Nucleosomes around the promoter region are disassembled for transcription in response to various signals, such as acetylation and methylation of histones. Although the interactions between histone-acetylation-recognizing bromodomains and factors involved in nucleosome disassembly have been reported, no structural basis connecting histone modifications and nucleosome disassembly has been obtained. Here, we determined at 3.3 A resolution the crystal structure of histone chaperone cell cycle gene 1 (CCG1) interacting factor A/antisilencing function 1 (CIA/ASF1) in complex with the double bromodomain in the CCG1/TAF1/TAF(II)250 subunit of transcription factor IID. Structural, biochemical, and biological studies suggested that interaction between double bromodomain and CIA/ASF1 is required for their colocalization, histone eviction, and pol II entry at active promoter regions. Furthermore, the present crystal structure has characteristics that can connect histone acetylation and CIA/ASF1-mediated histone eviction. These findings suggest that the molecular complex between CIA/ASF1 and the double bromodomain plays a key role in site-specific histone eviction at active promoter regions. The model we propose here is the initial structure-based model of the biological signaling from histone modifications to structural change of the nucleosome (hi-MOST model).

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Organizational Affiliation: 

Biomedicinal Information Research Center, National Institute of Advanced Industrial Science and Technology, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transcription initiation factor TFIID subunit 1	A	292	Homo sapiens	Mutation(s): 0  Gene Names: CCG1, TAF1, TAFII250, BA2R, CCGS, TAF2A EC: 2.7.11.1 (PDB Primary Data), 2.3.1.48 (UniProt)
Find proteins for P21675 (Homo sapiens) Explore P21675  Go to UniProtKB:  P21675
NIH Common Fund Data Resources
PHAROS:  P21675 GTEx:  ENSG00000147133

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone chaperone ASF1A	B, C [auth D]	158	Homo sapiens	Mutation(s): 0  Gene Names: ASF1A, CIA-I, CGI-98, HSPC146
Find proteins for Q9Y294 (Homo sapiens) Explore Q9Y294  Go to UniProtKB:  Q9Y294
NIH Common Fund Data Resources
PHAROS:  Q9Y294 GTEx:  ENSG00000111875

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.293 
• R-Value Work: 0.237 
• R-Value Observed: 0.240 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 102.12	α = 90
b = 102.12	β = 90
c = 271.92	γ = 120

Software Package:

Software Name	Purpose
PHASER	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-11-16 
• Released Date: 2010-04-28 
Deposition Author(s): Akai, Y., Adachi, N., Hayashi, Y., Eitoku, M., Sano, N., Natsume, R., Kudo, N., Tanokura, M., Senda, T., Horikoshi, M.

Revision History  

• Version 1.0: 2010-04-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2014-01-29
  Changes: Database references
• Version 1.3: 2017-10-11
  Changes: Refinement description