4NW3

Crystal structure of MLL CXXC domain in complex with a CpG DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

DNA Sequence Recognition of Human CXXC Domains and Their Structural Determinants.

Xu, C.Liu, K.Lei, M.Yang, A.Li, Y.Hughes, T.R.Min, J.

(2018) Structure 26: 85-95.e3

  • DOI: https://doi.org/10.1016/j.str.2017.11.022
  • Primary Citation of Related Structures:  
    4NW3, 4O64, 4PZI, 4Z3C, 5VC9, 5W9Q, 5W9S, 6ASB, 6ASD

  • PubMed Abstract: 

    The CXXC domain, first identified as the reader of unmodified CpG dinucleotide, plays important roles in epigenetic regulation by targeting various activities to CpG islands. Here we systematically measured and compared the DNA-binding selectivities of all known human CXXC domains by different binding assays, and complemented the existing function-based classification of human CXXC domains with a classification based on their DNA selectivities. Through a series of crystal structures of CXXC domains with DNA ligands, we unravel the molecular mechanisms of how these CXXC domains, including single CXXC domains and tandem CXXC-PHD domains, recognize distinct DNA ligands, which further supports our classification of human CXXC domains and also provides insights into selective recruitment of chromatin modifiers to their respective targets via CXXC domains recognizing different genomic DNA sequences. Our study facilitates the understanding of the relationship between the DNA-binding specificities of the CXXC proteins and their biological functions.


  • Organizational Affiliation

    Structural Genomics Consortium, University of Toronto, Toronto, ON M5G 1L7, Canada.


Macromolecules

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase 2A76Homo sapiensMutation(s): 0 
Gene Names: KMT2AALL1CXXC7HRXHTRXMLLMLL1TRX1
EC: 2.1.1.364 (UniProt), 2.1.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q03164 (Homo sapiens)
Explore Q03164 
Go to UniProtKB:  Q03164
PHAROS:  Q03164
GTEx:  ENSG00000118058 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ03164
Sequence Annotations
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains LengthOrganismImage
5'-D(*GP*CP*CP*AP*TP*CP*GP*AP*TP*GP*GP*C)-3'
B, C
12N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.327α = 90
b = 40.225β = 93.51
c = 60.959γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-23
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Refinement description
  • Version 1.2: 2018-01-03
    Changes: Database references
  • Version 1.3: 2022-08-24
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-09-20
    Changes: Data collection, Refinement description