5KKQ

Homo sapiens CCCTC-binding factor (CTCF) ZnF3-7 and DNA complex structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Structural Basis for the Versatile and Methylation-Dependent Binding of CTCF to DNA.

Hashimoto, H.Wang, D.Horton, J.R.Zhang, X.Corces, V.G.Cheng, X.

(2017) Mol Cell 66: 711-720.e3

  • DOI: https://doi.org/10.1016/j.molcel.2017.05.004
  • Primary Citation of Related Structures:  
    5K5H, 5K5I, 5K5J, 5K5L, 5KKQ, 5T00, 5T0U, 5UND

  • PubMed Abstract: 

    The multidomain CCCTC-binding factor (CTCF), containing a tandem array of 11 zinc fingers (ZFs), modulates the three-dimensional organization of chromatin. We crystallized the human CTCF DNA-binding domain in complex with a known CTCF-binding site. While ZF2 does not make sequence-specific contacts, each finger of ZF3-7 contacts three bases of the 15-bp consensus sequence. Each conserved nucleotide makes base-specific hydrogen bonds with a particular residue. Most of the variable base pairs within the core sequence also engage in interactions with the protein. These interactions compensate for deviations from the consensus sequence, allowing CTCF to adapt to sequence variations. CTCF is sensitive to cytosine methylation at position 2, but insensitive at position 12 of the 15-bp core sequence. These differences can be rationalized structurally. Although included in crystallizations, ZF10 and ZF11 are not visible, while ZF8 and ZF9 span the backbone of the DNA duplex, conferring no sequence specificity but adding to overall binding stability.


  • Organizational Affiliation

    Department of Biochemistry, Emory University School of Medicine, 1510 Clifton Road NE, Atlanta, GA 30322, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcriptional repressor CTCF
A, D
150Homo sapiensMutation(s): 0 
Gene Names: CTCF
UniProt & NIH Common Fund Data Resources
Find proteins for P49711 (Homo sapiens)
Explore P49711 
Go to UniProtKB:  P49711
PHAROS:  P49711
GTEx:  ENSG00000102974 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49711
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*TP*AP*GP*CP*GP*CP*CP*CP*CP*CP*TP*GP*CP*TP*GP*GP*C)-3')
B, E
17synthetic construct
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*CP*CP*AP*GP*CP*AP*GP*GP*GP*GP*GP*CP*GP*CP*TP*A)-3')
C, F
17synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
G [auth A]
H [auth A]
I [auth A]
J [auth A]
K [auth A]
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth D],
M [auth D],
N [auth D],
O [auth D],
P [auth D]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.171 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.994α = 98.33
b = 44.911β = 92.4
c = 86.797γ = 94.8
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
AutoSolphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM049245

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-24
    Type: Initial release
  • Version 1.1: 2017-06-07
    Changes: Database references
  • Version 1.2: 2017-06-14
    Changes: Database references
  • Version 1.3: 2017-09-20
    Changes: Author supporting evidence
  • Version 1.4: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.5: 2024-03-06
    Changes: Data collection, Database references