3OMJ

Structural Basis for Cyclic Py-Im Polyamide Allosteric Inhibition of Nuclear Receptor Binding

  • Classification: DNA

  • Deposited: 2010-08-27 Released: 2010-09-08 
  • Deposition Author(s): Chenoweth, D.M.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.124 
  • R-Value Work: 0.112 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for cyclic py-im polyamide allosteric inhibition of nuclear receptor binding.

Chenoweth, D.M.Dervan, P.B.

(2010) J.Am.Chem.Soc. 132: 14521-14529

  • DOI: 10.1021/ja105068b

  • PubMed Abstract: 
  • Pyrrole-imidazole polyamides are a class of small molecules that can be programmed to bind a broad repertoire of DNA sequences, disrupt transcription factor-DNA interfaces, and modulate gene expression pathways in cell culture experiments. In this pa ...

    Pyrrole-imidazole polyamides are a class of small molecules that can be programmed to bind a broad repertoire of DNA sequences, disrupt transcription factor-DNA interfaces, and modulate gene expression pathways in cell culture experiments. In this paper we describe a high-resolution X-ray crystal structure of a β-amino turn-linked eight-ring cyclic Py-Im polyamide bound to the central six base pairs of the sequence d(5'-CCAGTACTGG-3')(2), revealing significant modulation of DNA shape. We compare the DNA structural perturbations induced by DNA-binding transcripton factors, androgen receptor and glucocorticoid receptor, in the major groove to those induced by cyclic polyamide binding in the minor groove. The cyclic polyamide is an allosteric modulator that perturbs the DNA structure in such a way that nuclear receptor protein binding is no longer compatible. This allosteric perturbation of the DNA helix provides a molecular basis for disruption of transcription factor-DNA interfaces by small molecules, a minimum step in chemical control of gene networks.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*CP*(C38)P*AP*GP*TP*AP*CP*TP*GP*G)-3'A,B10N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1P2
Query on 1P2

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Download CCD File 
B
(23R,52R)-23,52-diamino-5,11,17,28,34,40,46,57-octamethyl-2,5,8,11,14,17,20,25,28,31,34,37,40,43,46,49,54,57,60,64-icosaazanonacyclo[54.2.1.1~4,7~.1~10,13~.1~16,19~.1~27,30~.1~33,36~.1~39,42~.1~45,48~]hexahexaconta-1(58),4(66),6,10(65),12,16(64),18,27(63),29,33(62),35,39(61),41,45(60),47,56(59)-hexadecaene-3,9,15,21,26,32,38,44,50,55-decone
C54 H62 N22 O10
KELPAVUCWDTHOZ-VSGBNLITSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
C38
Query on C38
A, B
DNA LINKINGC9 H13 I N3 O7 PDC
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.124 
  • R-Value Work: 0.112 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 39.831α = 90.00
b = 39.831β = 90.00
c = 84.567γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CrystalCleardata collection
SHELXSphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-08-27 
  • Released Date: 2010-09-08 
  • Deposition Author(s): Chenoweth, D.M.

Revision History 

  • Version 1.0: 2010-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance