3PTR

PHF2 Jumonji domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.954 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for human PHF2 Jumonji domain interaction with metal ions.

Horton, J.R.Upadhyay, A.K.Hashimoto, H.Zhang, X.Cheng, X.

(2011) J.Mol.Biol. 406: 1-8

  • DOI: 10.1016/j.jmb.2010.12.013
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • PHF2 belongs to a class of α-ketoglutarate-Fe(2)(+)-dependent dioxygenases. PHF2 harbors a plant homeodomain (PHD) and a Jumonji domain. PHF2, via its PHD, binds Lys4-trimethylated histone 3 in submicromolar affinity and has been reported to have the ...

    PHF2 belongs to a class of α-ketoglutarate-Fe(2)(+)-dependent dioxygenases. PHF2 harbors a plant homeodomain (PHD) and a Jumonji domain. PHF2, via its PHD, binds Lys4-trimethylated histone 3 in submicromolar affinity and has been reported to have the demethylase activity of monomethylated lysine 9 of histone 3 in vivo. However, we did not detect demethylase activity for PHF2 Jumonji domain (with and without its linked PHD) in the context of histone peptides. We determined the crystal structures of PHF2 Jumonji domain in the absence and presence of additional exogenous metal ions. When Fe(2+) or Ni(2+) was added at a high concentration (50 mM) and allowed to soak in the preformed crystals, Fe(2+) or Ni(2+) was bound by six ligands in an octahedral coordination. The side chains of H249 and D251 and the two oxygen atoms of N-oxalylglycine (an analog of α-ketoglutarate) provide four coordinations in the equatorial plane, while the hydroxyl oxygen atom of Y321 and one water molecule provide the two axial coordinations as the fifth and sixth ligands, respectively. The metal binding site in PHF2 closely resembles the Fe(2+) sites in other Jumonji domains examined, with one important difference-a tyrosine (Y321 of PHF2) replaces histidine as the fifth ligand. However, neither Y321H mutation nor high metal concentration renders PHF2 an active demethylase on histone peptides. Wild type and Y321H mutant bind Ni(2+) with an approximately equal affinity of 50 μM. We propose that there must be other regulatory factors required for the enzymatic activity of PHF2 in vivo or that perhaps PHF2 acts on non-histone substrates. Furthermore, PHF2 shares significant sequence homology throughout the entire region, including the above-mentioned tyrosine at the corresponding iron-binding position, with that of Schizosaccharomyces pombe Epe1, which plays an essential role in heterochromatin function but has no known enzymatic activity.


    Organizational Affiliation

    Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PHD finger protein 2
B
392Homo sapiensMutation(s): 0 
Gene Names: PHF2 (CENP-35, KIAA0662)
EC: 1.14.11.-
Find proteins for O75151 (Homo sapiens)
Go to Gene View: PHF2
Go to UniProtKB:  O75151
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.954 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.737α = 90.00
b = 66.512β = 90.00
c = 104.567γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
HKL-2000data collection
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-01-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-02-29
    Type: Database references