4XQZ

Calcium(II) and copper(II) bound to the Z-DNA form of d(CGCGCG), complexed by chloride and MES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.237 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

N,N,O and N,O,N Meridional cis Coordination of Two Guanines to Copper(II) by d(CGCGCG)2.

Rohner, M.Medina-Molner, A.Spingler, B.

(2016) Inorg Chem 55: 6130-6140

  • DOI: https://doi.org/10.1021/acs.inorgchem.6b00672
  • Primary Citation of Related Structures:  
    4XQZ, 4XSN, 5IHD

  • PubMed Abstract: 

    Many research groups study the generation of supramolecular n-dimensional arrays by combining metals with DNA building blocks. Most of the time, the natural nucleobases are modified to obtain higher-affinity metal binding sites. Using unmodified nucleobases avoids a potentially difficult synthesis; however, they have the possible disadvantage of a less defined and/or weaker coordination mode of the metal. Structural studies on the behavior of copper(II) as a linking metal and guanine as the natural ligand for metals in unmodified DNA are reported. Previously, the ability of mono- and dinuclear metal complexes to induce Z-DNA has been explored [Medina-Molner, A.; Spingler, B. Chem. Commun. 2012, 48, 1961; Medina-Molner, A.; Rohner, M.; Pandiarajan, D.; Spingler, B. Dalton Trans. 2015, 44, 3664]. Herein, X-ray crystallographic studies of the structures resulting from the combination of copper(II) ions with DNA hexamers of the general sequence d(CG)3 are presented. Three different packing motifs were observed in three crystal structures with resolutions ranging from 2.15 to 1.45 Å. The motifs are dependent upon other cations being present and/or the crystallization conditions. The first examples of intramolecular O6,N7-chelates of a neutral purine nucleobase to copper(II) were obtained as well as the first meridional N,N,O and N,O,N coordination modes of two guanines to copper(II). The fascinating coordination chemistry of copper(II) complexes generated by the Z-DNA oligonucleotides and the differences to simple nucleobases complexes with copper(II) are discussed in detail.


  • Organizational Affiliation

    University of Zurich , Department of Chemistry, Winterthurerstrasse 190, 8057 Zurich, Switzerland.


Macromolecules

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
DNA (5'-D(*CP*GP*CP*GP*CP*G)-3')
A, B, C, D, E
A, B, C, D, E, F, G, H
6synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MES
Query on MES

Download Ideal Coordinates CCD File 
O [auth D]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
CU
Query on CU

Download Ideal Coordinates CCD File 
I [auth A]
L [auth C]
N [auth D]
R [auth E]
U [auth G]
I [auth A],
L [auth C],
N [auth D],
R [auth E],
U [auth G],
V [auth H]
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
J [auth A],
S [auth E]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
K [auth A]
M [auth C]
Q [auth D]
T [auth F]
W [auth H]
K [auth A],
M [auth C],
Q [auth D],
T [auth F],
W [auth H],
X [auth H],
Y [auth H]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MOH
Query on MOH

Download Ideal Coordinates CCD File 
P [auth D]METHANOL
C H4 O
OKKJLVBELUTLKV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.300 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.34α = 90
b = 35.253β = 98.28
c = 47.643γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
X-Areadata reduction
XSCALEdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland--

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-27
    Type: Initial release
  • Version 1.1: 2016-07-13
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Data collection
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description