4FU6

Crystal structure of the PSIP1 PWWP domain

• PDB DOI: https://doi.org/10.2210/pdb4FU6/pdb

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


• Deposited: 2012-06-28 Released: 2012-08-29 
• Deposition Author(s): Qin, S., Tempel, W., Xu, C., Wu, H., Dong, A., Cerovina, T., Bountra, C., Arrowsmith, C.H., Edwards, A.M., Min, J., Structural Genomics Consortium (SGC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.232 
• R-Value Work: 0.200 
• R-Value Observed: 0.201 

Starting Model: experimental

Literature

Structure and function of the nucleosome-binding PWWP domain.

Qin, S., Min, J.

(2014) Trends Biochem Sci 39: 536-547

• PubMed: 25277115 
• DOI: https://doi.org/10.1016/j.tibs.2014.09.001
• Primary Citation of Related Structures:  
  4FU6


• PubMed Abstract: 
  

  PWWP domain-containing proteins are often involved in chromatin-associated biological processes, such as transcriptional regulation and DNA repair, and recent studies have shown that the PWWP domain specifies chromatin localization. Mutations in the PWWP domain, a 100-150 amino acid motif, have been linked to various human diseases, emphasizing its importance. Structural studies reveal that PWWP domains possess a conserved aromatic cage for histone methyl-lysine recognition, and synergistically bind both histone and DNA, which contributes to their nucleosome-binding ability and chromatin localization. Furthermore, the PWWP domain often cooperates with other histone and DNA 'reader' or 'modifier' domains to evoke crosstalk between various epigenetic marks. Here, we discuss these recent advances in understanding the structure and function of the PWWP domain.

---

Organizational Affiliation: 

Structural Genomics Consortium, University of Toronto, 101 College Street, Toronto, Ontario M5G 1L7, Canada.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 17.9 kDa 
• Atom Count: 808 
• Modelled Residue Count: 95 
• Deposited Residue Count: 153 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PC4 and SFRS1-interacting protein	A	153	Homo sapiens	Mutation(s): 0  Gene Names: PSIP1, DFS70, LEDGF, PSIP2
UniProt & NIH Common Fund Data Resources
Find proteins for O75475 (Homo sapiens) Explore O75475  Go to UniProtKB:  O75475
PHAROS:  O75475 GTEx:  ENSG00000164985

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A], D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
UNX	F [auth A], G [auth A], H [auth A], I [auth A], J [auth A]	UNKNOWN ATOM OR ION X

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.232 
• R-Value Work: 0.200 
• R-Value Observed: 0.201 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 45.96	α = 90
b = 45.96	β = 90
c = 156.24	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-08-29 
Deposition Author(s): Qin, S., Tempel, W., Xu, C., Wu, H., Dong, A., Cerovina, T., Bountra, C., Arrowsmith, C.H., Edwards, A.M., Min, J., Structural Genomics Consortium (SGC)

Revision History  

• Version 1.0: 2012-08-29
  Type: Initial release
  
• Version 1.1: 2017-11-15
  Changes: Refinement description
• Version 1.2: 2021-08-04
  Changes: Database references, Derived calculations
• Version 1.3: 2023-09-13
  Changes: Data collection, Database references, Refinement description