4Y6P: Structure Of Plasmodium Falciparum Dxr In Complex With A Beta- Substituted Fosmidomycin Analogue, Rc177, And Manganese

Citation:
Abstract
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 beta-position of the hydroxamate analogue of 2. While direct addition of a beta-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.
PDB ID: 4Y6PDownload
MMDB ID: 128281
PDB Deposition Date: 2015/2/13
Updated in MMDB: 2015/04
Experimental Method:
x-ray diffraction
Resolution: 1.9  Å
Source Organism:
Similar Structures:
Biological Unit for 4Y6P: dimeric; determined by author and by software (PISA)
Molecular Components in 4Y6P
Label Count Molecule
Proteins (2 molecules)
2
1-deoxy-d-xylulose 5-phosphate Reductoisomerase, Apicoplast(Gene symbol: PF3D7_1467300)
Molecule annotation
Chemicals (6 molecules)
1
2
2
2
3
1
4
1
* Click molecule labels to explore molecular sequence information.

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