4ya8: Difference between revisions
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''' | ==structure of plasmepsin II from Plasmodium Falciparum complexed with inhibitor PG394== | ||
<StructureSection load='4ya8' size='340' side='right' caption='[[4ya8]], [[Resolution|resolution]] 3.30Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4ya8]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4YA8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4YA8 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=49W:N-[(2S,3S)-3-HYDROXY-1-PHENYL-4-{[2-(PYRIDIN-2-YL)PROPAN-2-YL]AMINO}BUTAN-2-YL]-N,N-DIPROPYL-5-(PYRIDIN-1(2H)-YL)BENZENE-1,3-DICARBOXAMIDE'>49W</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[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] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ya8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ya8 OCA], [http://pdbe.org/4ya8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ya8 RCSB], [http://www.ebi.ac.uk/pdbsum/4ya8 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Plasmepsin II (PMII) is one of the ten plasmepsins (PMs) identified in the genome of Plasmodium falciparum, the causative agent of the most severe and deadliest form of malaria. Owing to the emergence of P. falciparum strains that are resistant to current antimalarial agents such as chloroquine and sulfadoxine/pyrimethamine, there is a constant pressure to find new and lasting chemotherapeutic drug therapies. Previously, the crystal structure of PMII in complex with NU655, a potent antimalarial hydroxyethylamine-based inhibitor, and the design of new compounds based on it have been reported. In the current study, two of these newly designed hydroxyethylamine-based inhibitors, PG418 and PG394, were cocrystallized with PMII and their structures were solved, analyzed and compared with that of the PMII-NU655 complex. Structural analysis of the PMII-PG418 complex revealed that the flap loop can adopt a fully closed conformation, stabilized by interactions with the inhibitor, and a fully open conformation, causing an overall expansion in the active-site cavity, which in turn causes unstable binding of the inhibitor. PG418 also stabilizes the flexible loop Gln275-Met286 of another monomer in the asymmetric unit of PMII, which is disordered in the PMII-NU655 complex structure. The crystal structure of PMII in complex with the inhibitor PG418 demonstrates the conformational flexibility of the active-site cavity of the plasmepsins. The interactions of the different moieties in the P1' position of PG418 and PG394 with Thr217 have to be taken into account in the design of new potent plasmepsin inhibitors. | |||
Structures of plasmepsin II from Plasmodium falciparum in complex with two hydroxyethylamine-based inhibitors.,Recacha R, Leitans J, Akopjana I, Aprupe L, Trapencieris P, Jaudzems K, Jirgensons A, Tars K Acta Crystallogr F Struct Biol Commun. 2015 Dec 1;71(Pt 12):1531-9. doi:, 10.1107/S2053230X15022049. Epub 2015 Nov 27. PMID:26625296<ref>PMID:26625296</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4ya8" style="background-color:#fffaf0;"></div> | |||
== References == | |||
[[Category: | <references/> | ||
__TOC__ | |||
</StructureSection> | |||
[[Category: Plasmepsin II]] | |||
[[Category: Jaudzems, K]] | [[Category: Jaudzems, K]] | ||
[[Category: Leitans, J]] | [[Category: Leitans, J]] | ||
[[Category: Recacha, R]] | |||
[[Category: Tars, K]] | [[Category: Tars, K]] | ||
[[Category: Hydrolase]] | |||
[[Category: Inhibitor]] | |||
[[Category: Malaria]] | |||
[[Category: Plasmepsin ii]] | |||
Revision as of 16:41, 9 December 2015
structure of plasmepsin II from Plasmodium Falciparum complexed with inhibitor PG394structure of plasmepsin II from Plasmodium Falciparum complexed with inhibitor PG394
Structural highlights
Publication Abstract from PubMedPlasmepsin II (PMII) is one of the ten plasmepsins (PMs) identified in the genome of Plasmodium falciparum, the causative agent of the most severe and deadliest form of malaria. Owing to the emergence of P. falciparum strains that are resistant to current antimalarial agents such as chloroquine and sulfadoxine/pyrimethamine, there is a constant pressure to find new and lasting chemotherapeutic drug therapies. Previously, the crystal structure of PMII in complex with NU655, a potent antimalarial hydroxyethylamine-based inhibitor, and the design of new compounds based on it have been reported. In the current study, two of these newly designed hydroxyethylamine-based inhibitors, PG418 and PG394, were cocrystallized with PMII and their structures were solved, analyzed and compared with that of the PMII-NU655 complex. Structural analysis of the PMII-PG418 complex revealed that the flap loop can adopt a fully closed conformation, stabilized by interactions with the inhibitor, and a fully open conformation, causing an overall expansion in the active-site cavity, which in turn causes unstable binding of the inhibitor. PG418 also stabilizes the flexible loop Gln275-Met286 of another monomer in the asymmetric unit of PMII, which is disordered in the PMII-NU655 complex structure. The crystal structure of PMII in complex with the inhibitor PG418 demonstrates the conformational flexibility of the active-site cavity of the plasmepsins. The interactions of the different moieties in the P1' position of PG418 and PG394 with Thr217 have to be taken into account in the design of new potent plasmepsin inhibitors. Structures of plasmepsin II from Plasmodium falciparum in complex with two hydroxyethylamine-based inhibitors.,Recacha R, Leitans J, Akopjana I, Aprupe L, Trapencieris P, Jaudzems K, Jirgensons A, Tars K Acta Crystallogr F Struct Biol Commun. 2015 Dec 1;71(Pt 12):1531-9. doi:, 10.1107/S2053230X15022049. Epub 2015 Nov 27. PMID:26625296[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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