4ZT7

Trypanosoma brucei methionyl-tRNA synthetase in complex with inhibitor N-[(4R)-6,8-dichloro-1,2,3,4-tetrahydroquinolin-4-yl]-N'-(5-fluoro-3H-imidazo[4,5-b]pyridin-2-yl)propane-1,3-diamine (Chem 1717)

PDB DOI: https://doi.org/10.2210/pdb4ZT7/pdb

Classification: Ligase/Ligase Inhibitor
Organism(s): Trypanosoma brucei brucei TREU927
Expression System: Escherichia coli BL21(DE3)
Mutation(s): Yes

Deposited: 2015-05-14 Released: 2016-05-04
Deposition Author(s): Koh, C.-Y., Hol, W.G.J.
Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.236
R-Value Work: 0.207
R-Value Observed: 0.209

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.3 of the entry. See complete history.

Literature

5-Fluoroimidazo[4,5-b]pyridine Is a Privileged Fragment That Conveys Bioavailability to Potent Trypanosomal Methionyl-tRNA Synthetase Inhibitors.

Zhang, Z., Koh, C.Y., Ranade, R.M., Shibata, S., Gillespie, J.R., Hulverson, M.A., Huang, W., Nguyen, J., Pendem, N., Gelb, M.H., Verlinde, C.L., Hol, W.G., Buckner, F.S., Fan, E.

(2016) ACS Infect Dis 2: 399-404

PubMed: 27627628 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1021/acsinfecdis.6b00036
Primary Citation of Related Structures:
4ZT2, 4ZT3, 4ZT4, 4ZT5, 4ZT6, 4ZT7

PubMed Abstract:
Fluorination is a well-known strategy for improving the bioavailability of drug molecules. However, its impact on efficacy is not easily predicted. On the basis of inhibitor-bound protein crystal structures, we found a beneficial fluorination spot for inhibitors targeting methionyl-tRNA synthetase of Trypanosoma brucei. In particular, incorporating 5-fluoroimidazo[4,5-b]pyridine into inhibitors leads to central nervous system bioavailability and maintained or even improved efficacy.

Organizational Affiliation

Department of Biochemistry, University of Washington , 1705 N.E. Pacific Street, Seattle, Washington 98195, United States.

Macromolecule Content

Total Structure Weight: 123.83 kDa
Atom Count: 8,904
Modelled Residue Count: 1,049
Deposited Residue Count: 1,084
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Methionyl-tRNA synthetase	A, B	542	Trypanosoma brucei brucei TREU927	Mutation(s): 3 Gene Names: Tb10.70.6470 EC: 6.1.1.10
UniProt
Find proteins for Q38C91 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1)) Explore Q38C91 Go to UniProtKB: Q38C91
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q38C91
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
4RC Query on 4RC Download Ideal Coordinates CCD File SDF format, chain G [auth B] MOL2 format, chain G [auth B]	G [auth B]	N-[(4R)-6,8-dichloro-1,2,3,4-tetrahydroquinolin-4-yl]-N'-(5-fluoro-3H-imidazo[4,5-b]pyridin-2-yl)propane-1,3-diamine C₁₈ H₁₉ Cl₂ F N₆ FPNBGOOGFIKSDR-CYBMUJFWSA-N		Interactions Focus chain G [auth B] Interactions & Density Focus chain G [auth B]
MET Query on MET Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A]	C [auth A]	METHIONINE C₅ H₁₁ N O₂ S FFEARJCKVFRZRR-BYPYZUCNSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
GOL Query on GOL Download Ideal Coordinates CCD File SDF format, chain H [auth B] MOL2 format, chain H [auth B]	H [auth B]	GLYCEROL C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N		Interactions Focus chain H [auth B] Interactions & Density Focus chain H [auth B]
DMS Query on DMS Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain I [auth B] MOL2 format, chain D [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain I [auth B]	D [auth A], E [auth A], F [auth A], I [auth B]	DIMETHYL SULFOXIDE C₂ H₆ O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain I [auth B] Interactions & Density Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain I [auth B]

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CAS Query on CAS	A, B	L-PEPTIDE LINKING	C₅ H₁₂ As N O₂ S		CYS

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.236
R-Value Work: 0.207
R-Value Observed: 0.209
Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.627	α = 90
b = 105.842	β = 90
c = 207.189	γ = 90

Software Package:

Software Name	Purpose
Aimless	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
Coot	model building

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2016-05-04

Deposition Author(s):

Koh, C.-Y.

Hol, W.G.J.

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	--

Revision History (Full details and data files)

Version 1.0: 2016-05-04
Type: Initial release
Version 1.1: 2016-10-12
Changes: Database references
Version 1.2: 2020-01-15
Changes: Author supporting evidence, Derived calculations
Version 1.3: 2023-09-27
Changes: Data collection, Database references, Refinement description