3REL

2.7 Angstrom Crystal Structure of the Nucleosome Core Particle Assembled with a 146 bp Alpha-Satellite DNA (NCP146b) Derivatized with Triamminechloroplatinum(II) Chloride


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.250 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Specific DNA structural attributes modulate platinum anticancer drug site selection and cross-link generation.

Wu, B.Davey, G.E.Nazarov, A.A.Dyson, P.J.Davey, C.A.

(2011) Nucleic Acids Res 39: 8200-8212

  • DOI: https://doi.org/10.1093/nar/gkr491
  • Primary Citation of Related Structures:  
    3REH, 3REI, 3REJ, 3REK, 3REL

  • PubMed Abstract: 

    Heavy metal compounds have toxic and medicinal potential through capacity to form strong specific bonds with macromolecules, and the interaction of platinum drugs at the major groove nitrogen atom of guanine bases primarily underlies their therapeutic activity. By crystallographic analysis of transition metal-and in particular platinum compound-DNA site selectivity in the nucleosome core, we establish that steric accessibility, which is controlled by specific structural parameters of the double helix, modulates initial guanine-metal bond formation. Moreover, DNA conformational features can be linked to both similarities and distinctions in platinum drug adduct formation between the naked and nucleosomal DNA states. Notably, structures that facilitate initial platinum-guanine bond formation can oppose cross-link generation, rationalizing the occurrence of long-lived therapeutically ineffective monofunctional adducts. These findings illuminate DNA structure-dependent reactivity and provide a novel framework for understanding metal-double helix interactions, which should facilitate the development of improved chromatin-targeting medicinal agents.


  • Organizational Affiliation

    Division of Structural and Computational Biology, School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.2
A, E
135Xenopus laevisMutation(s): 1 
UniProt
Find proteins for P84233 (Xenopus laevis)
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UniProt GroupP84233
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4
B, F
102Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P62799 (Xenopus laevis)
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UniProt GroupP62799
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A
C, G
129Xenopus laevisMutation(s): 2 
UniProt
Find proteins for P06897 (Xenopus laevis)
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Go to UniProtKB:  P06897
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UniProt GroupP06897
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B 1.1
D, H
122Xenopus laevisMutation(s): 1 
UniProt
Find proteins for P02281 (Xenopus laevis)
Explore P02281 
Go to UniProtKB:  P02281
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UniProt GroupP02281
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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (146-MER)
I, J
146Homo sapiens
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PT
Query on PT

Download Ideal Coordinates CCD File 
AA [auth I]
AB [auth J]
BA [auth I]
BB [auth J]
CA [auth I]
AA [auth I],
AB [auth J],
BA [auth I],
BB [auth J],
CA [auth I],
CB [auth J],
DA [auth I],
DB [auth J],
EA [auth I],
EB [auth J],
FA [auth I],
FB [auth J],
GA [auth I],
GB [auth J],
HA [auth I],
HB [auth J],
IA [auth I],
IB [auth J],
JA [auth I],
JB [auth J],
KA [auth I],
KB [auth J],
L [auth B],
LA [auth I],
MA [auth I],
NA [auth I],
OA [auth I],
P [auth F],
PA [auth J],
QA [auth J],
R [auth I],
RA [auth J],
S [auth I],
SA [auth J],
T [auth I],
TA [auth J],
U [auth I],
UA [auth J],
V [auth I],
VA [auth J],
W [auth I],
WA [auth J],
X [auth I],
XA [auth J],
Y [auth I],
YA [auth J],
Z [auth I],
ZA [auth J]
PLATINUM (II) ION
Pt
HRGDZIGMBDGFTC-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
M [auth C],
O [auth D],
Q [auth G]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
MN
Query on MN

Download Ideal Coordinates CCD File 
K [auth A],
N [auth D]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.302 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.250 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.659α = 90
b = 109.697β = 90
c = 175.654γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-14
    Type: Initial release
  • Version 1.1: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description