Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 70215.36 
• Atom Count: 4617 
• 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)


• 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: 3.3 Å
• R-Value Free: 0.293 
• R-Value Work: 0.237 

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.USA 107: 8153-8158

• PubMed: 20393127 
• DOI: 10.1073/pnas.0912509107


• 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Transcription initiation factor TFIID subunit 1	A	292	Homo sapiens	Mutation(s): 0  Gene Names: TAF1 (BA2R, CCG1, CCGS, TAF2A) EC: 2.3.1.48, 2.7.11.1
Find proteins for P21675 (Homo sapiens) Go to Gene View: TAF1 Go to UniProtKB:  P21675

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Histone chaperone ASF1A	B, D	158	Homo sapiens	Mutation(s): 0  Gene Names: ASF1A
Find proteins for Q9Y294 (Homo sapiens) Go to Gene View: ASF1A Go to UniProtKB:  Q9Y294

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.3 Å
• R-Value Free: 0.293 
• R-Value Work: 0.237 
• Space Group: P 6₁ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 102.120	α = 90.00
b = 102.120	β = 90.00
c = 271.920	γ = 120.00

Software Package:

Software Name	Purpose
DENZO	data reduction
REFMAC	refinement
PHASER	phasing
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
  Type: Advisory, Version format compliance
• Version 1.2: 2014-01-29
  Type: Database references
• Version 1.3: 2017-10-11
  Type: Refinement description