5YX2

Crystal structure of DNMT3A-DNMT3L in complex with DNA containing two CpG sites


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

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Literature

Structural basis for DNMT3A-mediated de novo DNA methylation.

Zhang, Z.M.Lu, R.Wang, P.Yu, Y.Chen, D.Gao, L.Liu, S.Ji, D.Rothbart, S.B.Wang, Y.Wang, G.G.Song, J.

(2018) Nature 554: 387-391

  • DOI: 10.1038/nature25477
  • Primary Citation of Related Structures:  
    5YX2, 6BRR, 6F57

  • PubMed Abstract: 
  • DNA methylation by de novo DNA methyltransferases 3A (DNMT3A) and 3B (DNMT3B) at cytosines is essential for genome regulation and development. Dysregulation of this process is implicated in various diseases, notably cancer. However, the mechanisms underlying DNMT3 substrate recognition and enzymatic specificity remain elusive ...

    DNA methylation by de novo DNA methyltransferases 3A (DNMT3A) and 3B (DNMT3B) at cytosines is essential for genome regulation and development. Dysregulation of this process is implicated in various diseases, notably cancer. However, the mechanisms underlying DNMT3 substrate recognition and enzymatic specificity remain elusive. Here we report a 2.65-ångström crystal structure of the DNMT3A-DNMT3L-DNA complex in which two DNMT3A monomers simultaneously attack two cytosine-phosphate-guanine (CpG) dinucleotides, with the target sites separated by 14 base pairs within the same DNA duplex. The DNMT3A-DNA interaction involves a target recognition domain, a catalytic loop, and DNMT3A homodimeric interface. Arg836 of the target recognition domain makes crucial contacts with CpG, ensuring DNMT3A enzymatic preference towards CpG sites in cells. Haematological cancer-associated somatic mutations of the substrate-binding residues decrease DNMT3A activity, induce CpG hypomethylation, and promote transformation of haematopoietic cells. Together, our study reveals the mechanistic basis for DNMT3A-mediated DNA methylation and establishes its aetiological link to human disease.


    Organizational Affiliation

    Environmental Toxicology Graduate Program, University of California, Riverside, California 92521, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA (cytosine-5)-methyltransferase 3AA,
C [auth D]
285Homo sapiensMutation(s): 0 
Gene Names: DNMT3A
EC: 2.1.1.37 (PDB Primary Data), 2.1.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y6K1 (Homo sapiens)
Explore Q9Y6K1 
Go to UniProtKB:  Q9Y6K1
PHAROS:  Q9Y6K1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y6K1
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA (cytosine-5)-methyltransferase 3-likeB,
D [auth C]
208Homo sapiensMutation(s): 0 
Gene Names: DNMT3L
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UJW3 (Homo sapiens)
Explore Q9UJW3 
Go to UniProtKB:  Q9UJW3
PHAROS:  Q9UJW3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UJW3
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (25-MER)E, F25synthetic construct
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
SAH BindingDB:  5YX2 IC50: 5.00e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 205.424α = 90
b = 205.424β = 90
c = 89.337γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
Cootmodel building
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-31
    Type: Initial release
  • Version 1.1: 2018-02-21
    Changes: Database references
  • Version 1.2: 2018-02-28
    Changes: Database references