3PTA | pdb_00003pta

Crystal structure of human DNMT1(646-1600) in complex with DNA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free: 
    0.291 (Depositor), 0.230 (DCC) 
  • R-Value Work: 
    0.257 (Depositor), 0.240 (DCC) 
  • R-Value Observed: 
    0.257 (Depositor) 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of DNMT1-DNA complex reveals a role for autoinhibition in maintenance DNA methylation.

Song, J., Rechkoblit, O., Bestor, T.H., Patel, D.J.

(2011) Science 331: 1036-1040

  • DOI: https://doi.org/10.1126/science.1195380
  • Primary Citation of Related Structures:  
    3PT6, 3PT9, 3PTA

  • PubMed Abstract: 

    Maintenance of genomic methylation patterns is mediated primarily by DNA methyltransferase-1 (DNMT1). We have solved structures of mouse and human DNMT1 composed of CXXC, tandem bromo-adjacent homology (BAH1/2), and methyltransferase domains bound to DNA-containing unmethylated CpG sites. The CXXC specifically binds to unmethylated CpG dinucleotide and positions the CXXC-BAH1 linker between the DNA and the active site of DNMT1, preventing de novo methylation. In addition, a loop projecting from BAH2 interacts with the target recognition domain (TRD) of the methyltransferase, stabilizing the TRD in a retracted position and preventing it from inserting into the DNA major groove. Our studies identify an autoinhibitory mechanism, in which unmethylated CpG dinucleotides are occluded from the active site to ensure that only hemimethylated CpG dinucleotides undergo methylation.

    • Organizational Affiliation: 

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA (cytosine-5)-methyltransferase 1956Homo sapiensMutation(s): 0 
Gene Names: DNMT1, AIM, CXXC9, DNMT
EC: 2.1.1.37
UniProt & NIH Common Fund Data Resources
Find proteins for P26358 (Homo sapiens)
Explore P26358 
Go to UniProtKB:  P26358
PHAROS:  P26358
GTEx:  ENSG00000130816 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26358
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*CP*CP*CP*GP*TP*GP*AP*GP*CP*CP*TP*CP*CP*GP*CP*AP*GP*G)-3')19N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*CP*CP*TP*GP*CP*GP*GP*AP*GP*GP*CP*TP*CP*AP*CP*GP*GP*GP*A)-3')19N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.60 Å
  • R-Value Free:  0.291 (Depositor), 0.230 (DCC) 
  • R-Value Work:  0.257 (Depositor), 0.240 (DCC) 
  • R-Value Observed: 0.257 (Depositor) 
Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 162.8α = 90
b = 87.9β = 97.2
c = 113.9γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-12-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations