4IQT

Tdt core in complex with inhibitor 6-[4-(3-fluorobenzoyl)-1H-pyrrol-2-yl]-2-hydroxy-4-oxohexa-2,5-dienoic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

New nucleotide-competitive non-nucleoside inhibitors of terminal deoxynucleotidyl transferase: discovery, characterization, and crystal structure in complex with the target.

Costi, R.Cuzzucoli Crucitti, G.Pescatori, L.Messore, A.Scipione, L.Tortorella, S.Amoroso, A.Crespan, E.Campiglia, P.Maresca, B.Porta, A.Granata, I.Novellino, E.Gouge, J.Delarue, M.Maga, G.Di Santo, R.

(2013) J Med Chem 56: 7431-7441

  • DOI: 10.1021/jm4010187
  • Primary Citation of Related Structures:  
    4IQT, 4IQU, 4IQV, 4IQW

  • PubMed Abstract: 
  • Terminal deoxynucletidyl transferase (TdT) is overexpressed in some cancer types, where it might compete with pol μ during the mutagenic repair of double strand breaks (DSBs) through the nonhomologous end joining (NHEJ) pathway. Here we report the discovery and characterization of pyrrolyl and indolyl diketo acids that specifically target TdT and behave as nucleotide-competitive inhibitors ...

    Terminal deoxynucletidyl transferase (TdT) is overexpressed in some cancer types, where it might compete with pol μ during the mutagenic repair of double strand breaks (DSBs) through the nonhomologous end joining (NHEJ) pathway. Here we report the discovery and characterization of pyrrolyl and indolyl diketo acids that specifically target TdT and behave as nucleotide-competitive inhibitors. These compounds show a selective toxicity toward MOLT-4 compared to HeLa cells that correlate well with in vitro selectivity for TdT. The binding site of two of these inhibitors was determined by cocrystallization with TdT, explaining why these compounds are competitive inhibitors of the deoxynucleotide triphosphate (dNTP). In addition, because of the observed dual localization of the phenyl substituent, these studies open the possibility of rationally designing more potent compounds.


    Organizational Affiliation

    Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, "Sapienza" Università di Roma , P.le Aldo Moro 5, I-00185 Roma, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA nucleotidylexotransferaseA400Mus musculusMutation(s): 0 
Gene Names: DnttTdt
EC: 2.7.7.31 (PDB Primary Data), 3.1.11 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P09838 (Mus musculus)
Explore P09838 
Go to UniProtKB:  P09838
IMPC:  MGI:98659
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1FO
Query on 1FO

Download Ideal Coordinates CCD File 
B [auth A]6-[4-(3-fluorobenzoyl)-1H-pyrrol-2-yl]-2-hydroxy-4-oxohexa-2,5-dienoic acid
C17 H12 F N O5
WQEAOCAOIXLGFY-OQLOTXMNSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1FOIC50 :  780   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.97α = 90
b = 84.86β = 90
c = 114.43γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
BUSTERrefinement
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2013-01-13 
  • Released Date: 2013-09-04 
  • Deposition Author(s): Gouge, J., Delarue, M.

Revision History  (Full details and data files)

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2013-10-09
    Changes: Database references
  • Version 1.2: 2017-07-26
    Changes: Refinement description, Source and taxonomy