4IGQ

Histone H3 Lysine 4 Demethylating Rice JMJ703 in complex with methylated H3K4 substrate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 

wwPDB Validation 3D Report Full Report



Literature

Structural basis of a histone H3 lysine 4 demethylase required for stem elongation in rice.

Chen, Q.Chen, X.Wang, Q.Zhang, F.Lou, Z.Zhang, Q.Zhou, D.X.

(2013) PLoS Genet 9: e1003239-e1003239

  • DOI: 10.1371/journal.pgen.1003239
  • Primary Citation of Related Structures:  
    4IGO, 4IGP, 4IGQ

  • PubMed Abstract: 
  • Histone lysine methylation is an important epigenetic modification in regulating chromatin structure and gene expression. Histone H3 lysine 4 methylation (H3K4me), which can be in a mono-, di-, or trimethylated state, has been shown to play an import ...

    Histone lysine methylation is an important epigenetic modification in regulating chromatin structure and gene expression. Histone H3 lysine 4 methylation (H3K4me), which can be in a mono-, di-, or trimethylated state, has been shown to play an important role in gene expression involved in plant developmental control and stress adaptation. However, the resetting mechanism of this epigenetic modification is not yet fully understood. In this work, we identified a JmjC domain-containing protein, JMJ703, as a histone lysine demethylase that specifically reverses all three forms of H3K4me in rice. Loss-of-function mutation of the gene affected stem elongation and plant growth, which may be related to increased expression of cytokinin oxidase genes in the mutant. Analysis of crystal structure of the catalytic core domain (c-JMJ703) of the protein revealed a general structural similarity with mammalian and yeast JMJD2 proteins that are H3K9 and H3K36 demethylases. However, several specific features were observed in the structure of c-JMJ703. Key residues that interact with cofactors Fe(II) and N-oxalylglycine and the methylated H3K4 substrate peptide were identified and were shown to be essential for the demethylase activity in vivo. Several key residues are specifically conserved in known H3K4 demethylases, suggesting that they may be involved in the specificity for H3K4 demethylation.


    Organizational Affiliation

    National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Os05g0196500 proteinA360Oryza sativa Japonica GroupMutation(s): 0 
Gene Names: P0617H07.8Os05g0196500JMJ703LOC_Os05g10770
EC: 1.14.11
Find proteins for Q53WJ1 (Oryza sativa subsp. japonica)
Explore Q53WJ1 
Go to UniProtKB:  Q53WJ1
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
mathylated H3K4 substrateB3N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OGA
Query on OGA

Download CCD File 
A
N-OXALYLGLYCINE
C4 H5 N O5
BIMZLRFONYSTPT-UHFFFAOYSA-N
 Ligand Interaction
FE
Query on FE

Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
M3L
Query on M3L
BL-PEPTIDE LINKINGC9 H21 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.425α = 90
b = 91.425β = 90
c = 75.834γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-03
    Type: Initial release