3ZHX image
Entry Detail
PDB ID:
3ZHX
Keywords:
Title:
Structure of Mycobacterium tuberculosis DXR in complex with a fosmidomycin analogue
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2012-12-30
Release Date:
2013-10-09
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:1-DEOXY-D-XYLULOSE 5-PHOSPHATE REDUCTOISOMERASE
Chain IDs:A, B
Chain Length:397
Number of Molecules:2
Biological Source:MYCOBACTERIUM TUBERCULOSIS
Primary Citation

Abstact

The antimalarial compound fosmidomycin targets DXR, the enzyme that catalyzes the first committed step in the MEP pathway, producing the essential isoprenoid precursors, isopentenyl diphosphate and dimethylallyl diphosphate. The MEP pathway is used by a number of pathogens, including Mycobacterium tuberculosis and apicomplexan parasites, and differs from the classical mevalonate pathway that is essential in humans. Using a structure-based approach, we designed a number of analogues of fosmidomycin, including a series that are substituted in both the Cα and the hydroxamate positions. The latter proved to be a stable framework for the design of inhibitors that extend from the polar and cramped (and so not easily druggable) substrate-binding site and can, for the first time, bridge the substrate and cofactor binding sites. A number of these compounds are more potent than fosmidomycin in terms of killing Plasmodium falciparum in an in vitro assay; the best has an IC50 of 40 nM.

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