5DS3

Crystal structure of constitutively active PARP-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

PARP-1 Activation Requires Local Unfolding of an Autoinhibitory Domain.

Dawicki-McKenna, J.M.Langelier, M.F.DeNizio, J.E.Riccio, A.A.Cao, C.D.Karch, K.R.McCauley, M.Steffen, J.D.Black, B.E.Pascal, J.M.

(2015) Mol Cell 60: 755-768

  • DOI: https://doi.org/10.1016/j.molcel.2015.10.013
  • Primary Citation of Related Structures:  
    5DS3, 5DSY

  • PubMed Abstract: 

    Poly(ADP-ribose) polymerase-1 (PARP-1) creates the posttranslational modification PAR from substrate NAD(+) to regulate multiple cellular processes. DNA breaks sharply elevate PARP-1 catalytic activity to mount a cell survival repair response, whereas persistent PARP-1 hyperactivation during severe genotoxic stress is associated with cell death. The mechanism for tight control of the robust catalytic potential of PARP-1 remains unclear. By monitoring PARP-1 dynamics using hydrogen/deuterium exchange-mass spectrometry (HXMS), we unexpectedly find that a specific portion of the helical subdomain (HD) of the catalytic domain rapidly unfolds when PARP-1 encounters a DNA break. Together with biochemical and crystallographic analysis of HD deletion mutants, we show that the HD is an autoinhibitory domain that blocks productive NAD(+) binding. Our molecular model explains how PARP-1 DNA damage detection leads to local unfolding of the HD that relieves autoinhibition, and has important implications for the design of PARP inhibitors.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6059, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Poly [ADP-ribose] polymerase 1271Homo sapiensMutation(s): 0 
Gene Names: PARP1ADPRTPPOL
EC: 2.4.2.30
UniProt & NIH Common Fund Data Resources
Find proteins for P09874 (Homo sapiens)
Explore P09874 
Go to UniProtKB:  P09874
PHAROS:  P09874
GTEx:  ENSG00000143799 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09874
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
09L BindingDB:  5DS3 Kd: 0.24 (nM) from 1 assay(s)
IC50: min: 0.9, max: 2960 (nM) from 35 assay(s)
EC50: min: 0.4, max: 60 (nM) from 5 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.405α = 90
b = 93.405β = 90
c = 134.197γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM087282

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-27
    Type: Initial release
  • Version 1.1: 2017-09-06
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Refinement description