4Y6S image
Entry Detail
PDB ID:
4Y6S
Keywords:
Title:
Structure of Plasmodium falciparum DXR in complex with a beta-substituted fosmidomycin analogue, RC134, and manganese
Biological Source:
PDB Version:
Deposition Date:
2015-02-13
Release Date:
2015-04-01
Method Details:
Experimental Method:
Resolution:
2.10 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:1-deoxy-D-xylulose 5-phosphate reductoisomerase, apicoplast
Chain IDs:A, B
Chain Length:422
Number of Molecules:2
Biological Source:Plasmodium falciparum (isolate 3D7)
Primary Citation
Synthesis and Bioactivity of beta-Substituted Fosmidomycin Analogues Targeting 1-Deoxy-d-xylulose-5-phosphate Reductoisomerase.
J.Med.Chem. 58 2988 3001 (2015)
PMID: 25781377 DOI: 10.1021/jm5014264

Abstact

Blocking the 2-C-methyl-d-erythrithol-4-phosphate (MEP) pathway for isoprenoid biosynthesis offers interesting prospects for inhibiting Plasmodium or Mycobacterium spp. growth. Fosmidomycin (1) and its homologue FR900098 (2) potently inhibit 1-deoxy-d-xylulose-5-phosphate reductoisomerase (Dxr), a key enzyme in this pathway. Here we introduced aryl or aralkyl substituents at the β-position of the hydroxamate analogue of 2. While direct addition of a β-aryl moiety resulted in poor inhibition, longer linkers between the carbon backbone and the phenyl ring were generally associated with better binding to the enzymes. X-ray structures of the parasite Dxr-inhibitor complexes show that the "longer" compounds generate a substantially different flap structure, in which a key tryptophan residue is displaced, and the aromatic group of the ligand lies between the tryptophan and the hydroxamate's methyl group. Although the most promising new Dxr inhibitors lack activity against Escherichia coli and Mycobacterium smegmatis, they proved to be highly potent inhibitors of Plasmodium falciparum in vitro growth.

Legend

Protein

Chemical

Disease

Primary Citation of related structures