4NSQ

Crystal structure of PCAF


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 

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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

  • 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. Here we present two dimeric structures of the PCAF acetyltransferase (HAT) domain. These dimerizations are mediated by either four-helical hydrophobic interactions or a ß-sheet extension. Our chemical cross-linking experiments in combined with site-directed mutagenesis demonstrated that the PCAF HAT domain mainly forms a dimer in solution through one of the observed interfaces. The results of maltose binding protein (MBP)-pulldown, co-immunoprecipitation and multiangle static light scattering experiments further indicated that PCAF dimeric state is detectable and may possibly exist in vivo. Taken together, our structural and biochemical studies indicate that PCAF appears to be a dimer in its functional ATAC complex.


  • Organizational Affiliation

    State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiamen 361102, China. jhan@xmu.edu.cn.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone acetyltransferase KAT2B
A, B, C, D
190Homo sapiensMutation(s): 0 
Gene Names: KAT2BPCAF
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 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92831
Sequence Annotations
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  • Reference Sequence
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 = 65.57α = 90
b = 65.57β = 90
c = 187.622γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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