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| | {{STRUCTURE_1ls5| PDB=1ls5 | SCENE= }} | | {{STRUCTURE_1ls5| PDB=1ls5 | SCENE= }} |
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| - | '''CRYSTAL STRUCTURE OF PLASMEPSIN IV FROM P. FALCIPARUM IN COMPLEX WITH PEPSTATIN A'''
| + | ===CRYSTAL STRUCTURE OF PLASMEPSIN IV FROM P. FALCIPARUM IN COMPLEX WITH PEPSTATIN A=== |
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| - | ==Overview==
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| - | Malaria remains a human disease of global significance and a major cause of high infant mortality in endemic nations. Parasites of the genus Plasmodium cause the disease by degrading human hemoglobin as a source of amino acids for their growth and maturation. Hemoglobin degradation is initiated by aspartic proteases, termed plasmepsins, with a cleavage at the alpha-chain between residues Phe33 and Leu34. Plasmepsin II is one of the four catalytically active plasmepsins that has been identified in the food vacuole of Plasmodium falciparum. Novel crystal structures of uncomplexed plasmepsin II as well as the complex with a potent inhibitor have been refined with data extending to resolution limits of 1.9A and 2.7A, and to R factors of 17% and 18%, respectively. The inhibitor, N-(3-[(2-benzo[1,3]dioxol-5-yl-ethyl)[3-(1-methyl-3-oxo-1,3-dihydro-isoind ol-2-yl)-propionyl]-amino]-1-benzyl-2-(hydroxypropyl)-4-benzyloxy-3,5-dime thoxy-benzamide, belongs to a family of potent non-peptidic inhibitors that have large P1' groups. Such inhibitors could not be modeled into the binding cavity of the structure of plasmepsin II in complex with pepstatin A. Our structures reveal that the binding cavities of the new complex and uncomplexed plasmepsin II are considerably more open than that of the pepstatin A complex, allowing for larger heterocyclic groups in the P1', P2' and P2 positions. Both complexed and uncomplexed plasmepsin II crystallized in space group P2, with one monomer in the asymmetric unit. The structures show extensive interlocking of monomers around the crystallographic axis of symmetry, with areas in excess of 2300A(2) buried at the interface, and a loop of one monomer interacting with the binding cavity of the 2-fold related monomer. Electron density for this loop is only fully ordered in the complexed structure.
| + | The line below this paragraph, {{ABSTRACT_PUBMED_12614616}}, adds the Publication Abstract to the page |
| | + | (as it appears on PubMed at http://www.pubmed.gov), where 12614616 is the PubMed ID number. |
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| | + | {{ABSTRACT_PUBMED_12614616}} |
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| | ==About this Structure== | | ==About this Structure== |
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| | [[Category: Yu, B.]] | | [[Category: Yu, B.]] |
| | [[Category: Eukaryotic aspartic proteinase]] | | [[Category: Eukaryotic aspartic proteinase]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:13:57 2008'' | + | |
| | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 21:58:32 2008'' |
Revision as of 18:58, 2 July 2008
Template:STRUCTURE 1ls5
CRYSTAL STRUCTURE OF PLASMEPSIN IV FROM P. FALCIPARUM IN COMPLEX WITH PEPSTATIN A
Template:ABSTRACT PUBMED 12614616
About this Structure
1LS5 is a Single protein structure of sequence from Plasmodium falciparum. This structure supersedes the now removed PDB entry 1jgf. Full crystallographic information is available from OCA.
Reference
Novel uncomplexed and complexed structures of plasmepsin II, an aspartic protease from Plasmodium falciparum., Asojo OA, Gulnik SV, Afonina E, Yu B, Ellman JA, Haque TS, Silva AM, J Mol Biol. 2003 Mar 14;327(1):173-81. PMID:12614616
Page seeded by OCA on Wed Jul 2 21:58:32 2008
