4Q15

Crystal Structure of Prolyl-tRNA synthetase (ProRS, Proline--tRNA ligase) from Plasmodium falciparum in complex with Halofuginone and AMPPNP in space group P212121 at 2.35 A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Biochemical and Structural Characterization of Selective Allosteric Inhibitors of the Plasmodium falciparum Drug Target, Prolyl-tRNA-synthetase.

Hewitt, S.N.Dranow, D.M.Horst, B.G.Abendroth, J.A.Forte, B.Hallyburton, I.Jansen, C.Baragana, B.Choi, R.Rivas, K.L.Hulverson, M.A.Dumais, M.Edwards, T.E.Lorimer, D.D.Fairlamb, A.H.Gray, D.W.Read, K.D.Lehane, A.M.Kirk, K.Myler, P.J.Wernimont, A.Walpole, C.Stacy, R.Barrett, L.K.Gilbert, I.H.Van Voorhis, W.C.

(2017) ACS Infect Dis 3: 34-44

  • DOI: https://doi.org/10.1021/acsinfecdis.6b00078
  • Primary Citation of Related Structures:  
    4NCX, 4Q15, 4WI1, 5IFU

  • PubMed Abstract: 

    Plasmodium falciparum (Pf) prolyl-tRNA synthetase (ProRS) is one of the few chemical-genetically validated drug targets for malaria, yet highly selective inhibitors have not been described. In this paper, approximately 40,000 compounds were screened to identify compounds that selectively inhibit PfProRS enzyme activity versus Homo sapiens (Hs) ProRS. X-ray crystallography structures were solved for apo, as well as substrate- and inhibitor-bound forms of PfProRS. We identified two new inhibitors of PfProRS that bind outside the active site. These two allosteric inhibitors showed >100 times specificity for PfProRS compared to HsProRS, demonstrating this class of compounds could overcome the toxicity related to HsProRS inhibition by halofuginone and its analogues. Initial medicinal chemistry was performed on one of the two compounds, guided by the cocrystallography of the compound with PfProRS, and the results can instruct future medicinal chemistry work to optimize these promising new leads for drug development against malaria.


  • Organizational Affiliation

    Center for Emerging and Reemerging Infectious Disease (CERID), University of Washington , 750 Republican Street, Seattle, Washington 98109, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proline--tRNA ligase
A, B
506Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: proRSPFL0670c
EC: 6.1.1.15
UniProt
Find proteins for Q8I5R7 (Plasmodium falciparum (isolate 3D7))
Explore Q8I5R7 
Go to UniProtKB:  Q8I5R7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8I5R7
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B]
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
HFG
Query on HFG

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
7-bromo-6-chloro-3-{3-[(2R,3S)-3-hydroxypiperidin-2-yl]-2-oxopropyl}quinazolin-4(3H)-one
C16 H17 Br Cl N3 O3
LVASCWIMLIKXLA-CABCVRRESA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
I [auth B],
J [auth B],
K [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A],
F [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.58α = 90
b = 78.09β = 90
c = 167.82γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-20
    Type: Initial release
  • Version 1.1: 2016-11-16
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Refinement description
  • Version 1.3: 2022-08-24
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-09-20
    Changes: Data collection, Refinement description