3PT6

Crystal structure of mouse DNMT1(650-1602) in complex with DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

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

  • 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 ...

    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

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA (cytosine-5)-methyltransferase 1A, F [auth B]954Mus musculusMutation(s): 0 
Gene Names: Dnmt1DnmtMet1Uim
EC: 2.1.1.37
UniProt
Find proteins for P13864 (Mus musculus)
Explore P13864 
Go to UniProtKB:  P13864
Protein Feature View
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  • Reference Sequence
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  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*TP*CP*CP*CP*GP*TP*GP*AP*GP*CP*CP*TP*CP*CP*GP*CP*AP*GP*G)-3')B [auth C], D19N/A
    Protein Feature View
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    • Reference Sequence
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(*CP*CP*TP*GP*CP*GP*GP*AP*GP*GP*CP*TP*CP*AP*CP*GP*GP*GP*A)-3')C [auth I], E [auth J]19N/A
      Protein Feature View
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      • Reference Sequence
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 3.00 Å
      • R-Value Free: 0.266 
      • R-Value Work: 0.211 
      • R-Value Observed: 0.213 
      • Space Group: P 1 21 1
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 83.192α = 90
      b = 213.507β = 99.64
      c = 86.274γ = 90
      Software Package:
      Software NamePurpose
      MAR345dtbdata collection
      SHARPphasing
      PHENIXrefinement
      HKL-2000data reduction
      HKL-2000data scaling

      Structure Validation

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      Ligand Structure Quality Assessment  



      Entry History 

      Deposition Data

      • Deposited Date: 2010-12-02 
      • Released Date: 2010-12-29 
      • Deposition Author(s): Song, J., Patel, D.J.

      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