ISDA

Entry Detail

PDB ID:

4ZT5

Keywords:

Title:

Trypanosoma brucei methionyl-tRNA synthetase in complex with inhibitor (2S)-N-(3,5-dichlorobenzyl)-N'-(1H-imidazo[4,5-b]pyridin-2-yl)-2-methylpropane-1,3-diamine (Chem 1655)

Biological Source:

Source Organism:

Trypanosoma brucei brucei

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2015-05-14

Release Date:

2016-05-04

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.35 Å

R-Value Free:

0.22

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Methionyl-tRNA synthetase
Mutations:K456A, K457R, E458A
Chain IDs:A, B
Chain Length:542
Number of Molecules:2
Biological Source:Trypanosoma brucei brucei

UniProt ID:Q38C91 Pfam ID:PF09334, PF19303 EC:6.1.1.10

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
CAS	A	CYS	modified residue

Ligand Molecules

4RN

DMS

GOL

MET

SO4

Primary Citation

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.Show

Acs Infect Dis. 2 399 404 (2016)

PMID: 27627628 DOI: 10.1021/acsinfecdis.6b00036

Abstact

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures