6NRI

Crystal Structure of human PARP-1 ART domain bound to inhibitor UTT83


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report

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This is version 1.2 of the entry. See complete history


Literature

Design and Synthesis of Poly(ADP-ribose) Polymerase Inhibitors: Impact of Adenosine Pocket-Binding Motif Appendage to the 3-Oxo-2,3-dihydrobenzofuran-7-carboxamide on Potency and Selectivity.

Velagapudi, U.K.Langelier, M.F.Delgado-Martin, C.Diolaiti, M.E.Bakker, S.Ashworth, A.Patel, B.A.Shao, X.Pascal, J.M.Talele, T.T.

(2019) J Med Chem 62: 5330-5357

  • DOI: https://doi.org/10.1021/acs.jmedchem.8b01709
  • Primary Citation of Related Structures:  
    6NRF, 6NRG, 6NRH, 6NRI, 6NRJ

  • PubMed Abstract: 

    Poly(adenosine 5'-diphosphate-ribose) polymerase (PARP) inhibitors are a class of anticancer drugs that block the catalytic activity of PARP proteins. Optimization of our lead compound 1 (( Z)-2-benzylidene-3-oxo-2,3-dihydrobenzofuran-7-carboxamide; PARP-1 IC 50 = 434 nM) led to a tetrazolyl analogue (51, IC 50 = 35 nM) with improved inhibition. Isosteric replacement of the tetrazole ring with a carboxyl group (60, IC 50 = 68 nM) gave a promising new lead, which was subsequently optimized to obtain analogues with potent PARP-1 IC 50 values (4-197 nM). PARP enzyme profiling revealed that the majority of compounds are selective toward PARP-2 with IC 50 values comparable to clinical inhibitors. X-ray crystal structures of the key inhibitors bound to PARP-1 illustrated the mode of interaction with analogue appendages extending toward the PARP-1 adenosine-binding pocket. Compound 81, an isoform-selective PARP-1/-2 (IC 50 = 30 nM/2 nM) inhibitor, demonstrated selective cytotoxic effect toward breast cancer gene 1 ( BRCA1)-deficient cells compared to isogenic BRCA1-proficient cells.


  • Organizational Affiliation

    Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences , St. John's University , Queens , New York 11439 , United States.


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 (PDB Primary Data), 2.4.2 (PDB Primary Data)
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
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
KYM
Query on KYM

Download Ideal Coordinates CCD File 
B [auth A](2Z)-2-{[4-(3-cyclopropyl-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-carbonyl)phenyl]methylidene}-3-oxo-2,3-dihydro-1-benzofuran-7-carboxamide
C25 H21 N5 O4
JJCAYWVTBMMQMQ-UNOMPAQXSA-N
CIT
Query on CIT

Download Ideal Coordinates CCD File 
C [auth A]CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
DMS
Query on DMS

Download Ideal Coordinates CCD File 
D [auth A]DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Binding Affinity Annotations 
IDSourceBinding Affinity
KYM Binding MOAD:  6NRI IC50: 27 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.616α = 90
b = 92.616β = 90
c = 142.072γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaBMA342854

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-14
    Type: Initial release
  • Version 1.1: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description