4U7T

Crystal structure of DNMT3A-DNMT3L in complex with histone H3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insight into autoinhibition and histone H3-induced activation of DNMT3A

Guo, X.Wang, L.Li, J.Ding, Z.Xiao, J.Yin, X.He, S.Shi, P.Dong, L.Li, G.Tian, C.Wang, J.Cong, Y.Xu, Y.

(2015) Nature 517: 640-644

  • DOI: 10.1038/nature13899
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DNA methylation is an important epigenetic modification that is essential for various developmental processes through regulating gene expression, genomic imprinting, and epigenetic inheritance. Mammalian genomic DNA methylation is established during ...

    DNA methylation is an important epigenetic modification that is essential for various developmental processes through regulating gene expression, genomic imprinting, and epigenetic inheritance. Mammalian genomic DNA methylation is established during embryogenesis by de novo DNA methyltransferases, DNMT3A and DNMT3B, and the methylation patterns vary with developmental stages and cell types. DNA methyltransferase 3-like protein (DNMT3L) is a catalytically inactive paralogue of DNMT3 enzymes, which stimulates the enzymatic activity of Dnmt3a. Recent studies have established a connection between DNA methylation and histone modifications, and revealed a histone-guided mechanism for the establishment of DNA methylation. The ATRX-DNMT3-DNMT3L (ADD) domain of Dnmt3a recognizes unmethylated histone H3 (H3K4me0). The histone H3 tail stimulates the enzymatic activity of Dnmt3a in vitro, whereas the molecular mechanism remains elusive. Here we show that DNMT3A exists in an autoinhibitory form and that the histone H3 tail stimulates its activity in a DNMT3L-independent manner. We determine the crystal structures of DNMT3A-DNMT3L (autoinhibitory form) and DNMT3A-DNMT3L-H3 (active form) complexes at 3.82 and 2.90 Å resolution, respectively. Structural and biochemical analyses indicate that the ADD domain of DNMT3A interacts with and inhibits enzymatic activity of the catalytic domain (CD) through blocking its DNA-binding affinity. Histone H3 (but not H3K4me3) disrupts ADD-CD interaction, induces a large movement of the ADD domain, and thus releases the autoinhibition of DNMT3A. The finding adds another layer of regulation of DNA methylation to ensure that the enzyme is mainly activated at proper targeting loci when unmethylated H3K4 is present, and strongly supports a negative correlation between H3K4me3 and DNA methylation across the mammalian genome. Our study provides a new insight into an unexpected autoinhibition and histone H3-induced activation of the de novo DNA methyltransferase after its initial genomic positioning.


    Organizational Affiliation

    1] Fudan University Shanghai Cancer Center, Institute of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai 200032, China [2] State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA (cytosine-5)-methyltransferase 3A
A, C
445Homo sapiensMutation(s): 0 
Gene Names: DNMT3A
EC: 2.1.1.37
Find proteins for Q9Y6K1 (Homo sapiens)
Go to Gene View: DNMT3A
Go to UniProtKB:  Q9Y6K1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA (cytosine-5)-methyltransferase 3-like
B, D
209Homo sapiensMutation(s): 0 
Gene Names: DNMT3L
Find proteins for Q9UJW3 (Homo sapiens)
Go to Gene View: DNMT3L
Go to UniProtKB:  Q9UJW3
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
peptide from Histone H3.3
F, G
12Homo sapiensMutation(s): 0 
Gene Names: H3F3A, H3F3B (H3.3A, H3F3, H3.3B)
Find proteins for P84243 (Homo sapiens)
Go to Gene View: H3F3A H3F3B
Go to UniProtKB:  P84243
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SAH
Query on SAH

Download SDF File 
Download CCD File 
A, C
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SAHIC50: >50000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.223 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 183.823α = 90.00
b = 183.823β = 90.00
c = 123.265γ = 120.00
Software Package:
Software NamePurpose
Cootmodel building
PHASERphasing
HKLdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKLdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references
  • Version 1.2: 2015-02-04
    Type: Database references