2c07
From Proteopedia
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| - | [[Image:2c07.gif|left|200px]] | + | [[Image:2c07.gif|left|200px]] |
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| - | '''OXOACYL-ACP REDUCTASE OF PLASMODIUM FALCIPARUM''' | + | {{Structure |
| + | |PDB= 2c07 |SIZE=350|CAPTION= <scene name='initialview01'>2c07</scene>, resolution 1.50Å | ||
| + | |SITE= <scene name='pdbsite=AC1:So4+Binding+Site+For+Chain+A'>AC1</scene> | ||
| + | |LIGAND= <scene name='pdbligand=SO4:SULFATE ION'>SO4</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/3-oxoacyl-[acyl-carrier-protein]_reductase 3-oxoacyl-[acyl-carrier-protein] reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.100 1.1.1.100] | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''OXOACYL-ACP REDUCTASE OF PLASMODIUM FALCIPARUM''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 2C07 is a [ | + | 2C07 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Plasmodium_falciparum Plasmodium falciparum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2C07 OCA]. |
==Reference== | ==Reference== | ||
| - | Kinetic, inhibition and structural studies on 3-oxoacyl-ACP reductase from Plasmodium falciparum, a key enzyme in fatty acid biosynthesis., Wickramasinghe SR, Inglis KA, Urch JE, Muller S, van Aalten DM, Fairlamb AH, Biochem J. 2006 Jan 15;393(Pt 2):447-57. PMID:[http:// | + | Kinetic, inhibition and structural studies on 3-oxoacyl-ACP reductase from Plasmodium falciparum, a key enzyme in fatty acid biosynthesis., Wickramasinghe SR, Inglis KA, Urch JE, Muller S, van Aalten DM, Fairlamb AH, Biochem J. 2006 Jan 15;393(Pt 2):447-57. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16225460 16225460] |
[[Category: 3-oxoacyl-[acyl-carrier-protein] reductase]] | [[Category: 3-oxoacyl-[acyl-carrier-protein] reductase]] | ||
[[Category: Plasmodium falciparum]] | [[Category: Plasmodium falciparum]] | ||
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[[Category: short-chain alcohol reductase]] | [[Category: short-chain alcohol reductase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:09:02 2008'' |
Revision as of 14:09, 20 March 2008
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| , resolution 1.50Å | |||||||
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| Sites: | |||||||
| Ligands: | |||||||
| Activity: | [acyl-carrier-protein_reductase 3-oxoacyl-[acyl-carrier-protein] reductase], with EC number 1.1.1.100 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
OXOACYL-ACP REDUCTASE OF PLASMODIUM FALCIPARUM
Overview
Type II fatty acid biosynthesis represents an attractive target for the discovery of new antimalarial drugs. Previous studies have identified malarial ENR (enoyl acyl-carrier-protein reductase, or FabI) as the target for the antiseptic triclosan. In the present paper, we report the biochemical properties and 1.5 A (1 A=0.1 nm) crystal structure of OAR (3-oxoacyl acyl-carrier-protein reductase, or FabG), the second reductive step in fatty acid biosynthesis and its inhibition by hexachlorophene. Under optimal conditions of pH and ionic strength, Plasmodium falciparum OAR displays kinetic properties similar to those of OAR from bacteria or plants. Activity with NADH is <3% of that with NADPH. Fluorescence enhancement studies indicate that NADPH can bind to the free enzyme, consistent with kinetic and product inhibition studies suggesting a steady-state ordered mechanism. The crystal structure reveals a tetramer with a sulphate ion bound in the cofactor-binding site such that the side chains of the catalytic triad of serine, tyrosine and lysine are aligned in an active conformation, as previously observed in the Escherichia coli OAR-NADP+ complex. A cluster of positively charged residues is positioned at the entrance to the active site, consistent with the proposed recognition site for the physiological substrate (3-oxoacyl-acyl-carrier protein) in E. coli OAR. The antibacterial and anthelminthic agent hexachlorophene is a potent inhibitor of OAR (IC50 2.05 microM) displaying non-linear competitive inhibition with respect to NADPH. Hexachlorophene (EC50 6.2 microM) and analogues such as bithionol also have antimalarial activity in vitro, suggesting they might be useful leads for further development.
About this Structure
2C07 is a Single protein structure of sequence from Plasmodium falciparum. Full crystallographic information is available from OCA.
Reference
Kinetic, inhibition and structural studies on 3-oxoacyl-ACP reductase from Plasmodium falciparum, a key enzyme in fatty acid biosynthesis., Wickramasinghe SR, Inglis KA, Urch JE, Muller S, van Aalten DM, Fairlamb AH, Biochem J. 2006 Jan 15;393(Pt 2):447-57. PMID:16225460 [[Category: 3-oxoacyl-[acyl-carrier-protein] reductase]]
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