4NSQ

Crystal structure of PCAF

• PDB DOI: https://doi.org/10.2210/pdb4NSQ/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-11-28 Released: 2014-03-05 
• Deposition Author(s): Lin, J.Y., Cai, Y.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.31 Å
• R-Value Free: 0.275 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 

Literature

Dimeric structure of p300/CBP associated factor.

Shi, S., Lin, J., Cai, Y., Yu, J., Hong, H., Ji, K., Downey, J.S., Lu, X., Chen, R., Han, J., Han, A.

(2014) BMC Struct Biol 14: 2-2

• PubMed: 24423233 
• DOI: https://doi.org/10.1186/1472-6807-14-2
• Primary Citation of Related Structures:  
  4NSQ


• PubMed Abstract: 
  

  p300/CBP associating factor (PCAF, also known as KAT2B for lysine acetyltransferase 2B) is a catalytic subunit of megadalton metazoan complex ATAC (Ada-Two-A containing complex) for acetylation of histones. However, relatively little is known about the regulation of the enzymatic activity of PCAF.

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Organizational Affiliation: 

State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen 361102, China. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 90.42 kDa 
• Atom Count: 5,296 
• Modelled Residue Count: 628 
• Deposited Residue Count: 760 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone acetyltransferase KAT2B	A, B, C, D	190	Homo sapiens	Mutation(s): 0  Gene Names: KAT2B, PCAF EC: 2.3.1.48
UniProt & NIH Common Fund Data Resources
Find proteins for Q92831 (Homo sapiens) Explore Q92831  Go to UniProtKB:  Q92831
PHAROS:  Q92831 GTEx:  ENSG00000114166

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
COA	E [auth A], F [auth B], G [auth C], H [auth D]	COENZYME A C21 H36 N7 O16 P3 S RGJOEKWQDUBAIZ-IBOSZNHHSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
COA	BindingDB:  4NSQ	IC50: 4.19e+4 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.31 Å
• R-Value Free: 0.275 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 
• Space Group: P 4₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.57	α = 90
b = 65.57	β = 90
c = 187.622	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASES	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-03-05 
Deposition Author(s): Lin, J.Y., Cai, Y.F.

Revision History  

• Version 1.0: 2014-03-05
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references, Derived calculations