View source for 1lee

[[Image:1lee.gif|left|200px]]<br /><applet load="1lee" size="450" color="white" frame="true" align="right" spinBox="true" 
caption="1lee, resolution 1.90&Aring;" />
'''CRYSTAL STRUCTURE OF PLASMEPSIN FROM P. FALCIPARUM IN COMPLEX WITH INHIBITOR RS367'''<br />

==Overview==
Plasmepsin II is one of the four catalytically active plasmepsins found in, the food vacuole of Plasmodium falciparum. These enzymes initiate, hemoglobin degradation by cleavage at the alpha-chain between Phe33 and, Leu34. The crystal structures of Ser205 mutant plasmepsin II from P., falciparum in complex with two inhibitors have been refined at a, resolution of 1.8 A in the space group I222 and to R factors of 19.9 and, 19.5%. Each crystal contains one monomer in the asymmetric unit. Both, inhibitors have a Phe-Leu core and incorporate tetrahedral, transition-state mimetic hydroxypropylamine. The inhibitor rs367 possesses, a 2,6-dimethylphenyloxyacetyl group at the P2 position and, 3-aminobenzamide at the P2' position, while rs370 has the same P2 group, but 4-aminobenzamide in the P2' position. These complexes reveal key, conserved hydrogen bonds between the inhibitor and the binding-cavity, residues, notably with the flap residues Val78 and Ser79, the catalytic, dyad Asp34 and Asp214 and the residues Ser218 and Gly36 that are in, proximity to the catalytic dyad. The structures also show unexpected, conformational variability of the binding cavity of plasmepsin II and may, reflect the mode of binding of the hemoglobin alpha-chain for cleavage.

==About this Structure==
1LEE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Plasmodium_falciparum Plasmodium falciparum] with R36 as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Plasmepsin_II Plasmepsin II], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.23.39 3.4.23.39] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1LEE OCA]. 

==Reference==
Structures of Ser205 mutant plasmepsin II from Plasmodium falciparum at 1.8 A in complex with the inhibitors rs367 and rs370., Asojo OA, Afonina E, Gulnik SV, Yu B, Erickson JW, Randad R, Medjahed D, Silva AM, Acta Crystallogr D Biol Crystallogr. 2002 Dec;58(Pt 12):2001-8. Epub 2002, Nov 23. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12454457 12454457]
[[Category: Plasmepsin II]]
[[Category: Plasmodium falciparum]]
[[Category: Single protein]]
[[Category: Afonina, E.]]
[[Category: Asojo, O.A.]]
[[Category: Erickson, J.W.]]
[[Category: Gulnik, S.V.]]
[[Category: Mehadjed, D.]]
[[Category: Randad, R.]]
[[Category: Silva, A.M.]]
[[Category: Yu, B.]]
[[Category: R36]]
[[Category: aspartic protease]]
[[Category: plasmepsin]]
[[Category: plasmodium falciparum]]

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