7VC1

Toxoplasma gondii Prolyl-tRNA Synthetase (TgPRS) in Complex with inhibitor L95 and L-proline in space group P21

PDB DOI: https://doi.org/10.2210/pdb7VC1/pdb

Classification: LIGASE/LIGASE INHIBITOR
Organism(s): Toxoplasma gondii
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2021-09-01 Released: 2022-09-07
Deposition Author(s): Yogavel, M., Malhotra, N., Sharma, A.
Funding Organization(s): Department of Biotechnology (DBT, India)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.89 Å
R-Value Free: 0.211
R-Value Work: 0.174
R-Value Observed: 0.176

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

Targeting prolyl-tRNA synthetase via a series of ATP-mimetics to accelerate drug discovery against toxoplasmosis.

Yogavel, M., Bougdour, A., Mishra, S., Malhotra, N., Chhibber-Goel, J., Bellini, V., Harlos, K., Laleu, B., Hakimi, M.A., Sharma, A.

(2023) PLoS Pathog 19: e1011124-e1011124

PubMed: 36854028 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1371/journal.ppat.1011124
Primary Citation of Related Structures:
7F98, 7F99, 7F9A, 7F9B, 7F9C, 7F9D, 7FAK, 7FAL, 7FAM, 7FAN, 7VC1, 7VC2, 7VC3

PubMed Abstract:
The prolyl-tRNA synthetase (PRS) is a validated drug target for febrifugine and its synthetic analog halofuginone (HFG) against multiple apicomplexan parasites including Plasmodium falciparum and Toxoplasma gondii. Here, a novel ATP-mimetic centered on 1-(pyridin-4-yl) pyrrolidin-2-one (PPL) scaffold has been validated to bind to Toxoplasma gondii PRS and kill toxoplasma parasites. PPL series exhibited potent inhibition at the cellular (T. gondii parasites) and enzymatic (TgPRS) levels compared to the human counterparts. Cell-based chemical mutagenesis was employed to determine the mechanism of action via a forward genetic screen. Tg-resistant parasites were analyzed with wild-type strain by RNA-seq to identify mutations in the coding sequence conferring drug resistance by computational analysis of variants. DNA sequencing established two mutations, T477A and T592S, proximal to terminals of the PPL scaffold and not directly in the ATP, tRNA, or L-pro sites, as supported by the structural data from high-resolution crystal structures of drug-bound enzyme complexes. These data provide an avenue for structure-based activity enhancement of this chemical series as anti-infectives.

Organizational Affiliation

Molecular Medicine-Structural Parasitology Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, New Delhi, India.

Macromolecule Content

Total Structure Weight: 117.31 kDa
Atom Count: 8,529
Modelled Residue Count: 962
Deposited Residue Count: 1,000
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Prolyl-tRNA synthetase (ProRS)	A, B	500	Toxoplasma gondii	Mutation(s): 0 Gene Names: TGRH88_057780 EC: 6.1.1.15
UniProt
Find proteins for A0A7J6JUK2 (Toxoplasma gondii) Explore A0A7J6JUK2 Go to UniProtKB: A0A7J6JUK2
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	A0A7J6JUK2
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
JE6 (Subject of Investigation/LOI) Query on JE6 Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	~{N}-[4-[(3~{S})-3-cyano-3-cyclopropyl-2-oxidanylidene-pyrrolidin-1-yl]-6-methyl-pyridin-2-yl]-2-phenyl-ethanamide C₂₂ H₂₂ N₄ O₂ FLWLQSFDWRRFDA-JOCHJYFZSA-N		Interactions Focus chain C [auth A]
PRO Query on PRO Download Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	PROLINE C₅ H₉ N O₂ ONIBWKKTOPOVIA-BYPYZUCNSA-N		Interactions Focus chain D [auth A]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain J [auth A] SDF format, chain Q [auth B] MOL2 format, chain J [auth A] MOL2 format, chain Q [auth B] mmCIF format, chain J [auth A] mmCIF format, chain Q [auth B]	J [auth A], Q [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain J [auth A] Focus chain Q [auth B]
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain H [auth A] SDF format, chain I [auth A] SDF format, chain M [auth B] SDF format, chain N [auth B] SDF format, chain O [auth B] SDF format, chain P [auth B] SDF format, chain L [auth B] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] MOL2 format, chain I [auth A] MOL2 format, chain M [auth B] MOL2 format, chain N [auth B] MOL2 format, chain O [auth B] MOL2 format, chain P [auth B] MOL2 format, chain L [auth B] mmCIF format, chain E [auth A] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A] mmCIF format, chain H [auth A] mmCIF format, chain I [auth A] mmCIF format, chain M [auth B] mmCIF format, chain N [auth B] mmCIF format, chain O [auth B] mmCIF format, chain P [auth B] mmCIF format, chain L [auth B]	E [auth A] F [auth A] G [auth A] H [auth A] I [auth A] E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], L [auth B], M [auth B], N [auth B], O [auth B], P [auth B]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Focus chain I [auth A] Focus chain L [auth B] Focus chain M [auth B] Focus chain N [auth B] Focus chain O [auth B] Focus chain P [auth B]
CL Query on CL Download Ideal Coordinates CCD File SDF format, chain K [auth A] SDF format, chain R [auth B] SDF format, chain T [auth B] SDF format, chain S [auth B] MOL2 format, chain K [auth A] MOL2 format, chain R [auth B] MOL2 format, chain T [auth B] MOL2 format, chain S [auth B] mmCIF format, chain K [auth A] mmCIF format, chain R [auth B] mmCIF format, chain T [auth B] mmCIF format, chain S [auth B]	K [auth A], R [auth B], S [auth B], T [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M		Interactions Focus chain K [auth A] Focus chain R [auth B] Focus chain S [auth B] Focus chain T [auth B]