2wkf: Difference between revisions
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<StructureSection load='2wkf' size='340' side='right'caption='[[2wkf]], [[Resolution|resolution]] 2.05Å' scene=''> | <StructureSection load='2wkf' size='340' side='right'caption='[[2wkf]], [[Resolution|resolution]] 2.05Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2wkf]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[2wkf]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Plasmodium_falciparum_3D7 Plasmodium falciparum 3D7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WKF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2WKF FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CME:S,S-(2-HYDROXYETHYL)THIOCYSTEINE'>CME</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2wkf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wkf OCA], [https://pdbe.org/2wkf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2wkf RCSB], [https://www.ebi.ac.uk/pdbsum/2wkf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2wkf ProSAT]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2wkf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wkf OCA], [https://pdbe.org/2wkf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2wkf RCSB], [https://www.ebi.ac.uk/pdbsum/2wkf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2wkf ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q8I5C5_PLAF7 Q8I5C5_PLAF7] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: | [[Category: Plasmodium falciparum 3D7]] | ||
[[Category: Augustijn | [[Category: Augustijn KD]] | ||
[[Category: Brannigan | [[Category: Brannigan JA]] | ||
[[Category: Dobson | [[Category: Dobson SE]] | ||
[[Category: Dodson | [[Category: Dodson EJ]] | ||
[[Category: Waters | [[Category: Waters AP]] | ||
[[Category: Wilkinson | [[Category: Wilkinson AJ]] | ||
Revision as of 18:59, 13 December 2023
Crystal Structure of Macrophage Migration Inhibitory Factor from Plasmodium falciparumCrystal Structure of Macrophage Migration Inhibitory Factor from Plasmodium falciparum
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedMalaria, caused by Plasmodium falciparum and related parasites, is responsible for millions of deaths each year, mainly from complications arising from the blood stages of its life cycle. Macrophage migration inhibitory factor (MIF), a protein expressed by the parasite during these stages, has been characterized in mammals as a cytokine involved in a broad spectrum of immune responses. It also possesses two catalytic activites; a tautomerase and an oxidoreductase, though the physiological significance of neither reaction is known. Here, we have determined the crystal structure of MIF from two malaria parasites, Plasmodium falciparumand Plasmodium bergheiat 2.2 A and 1.8 A, respectively. The structures have an alpha/beta fold and each reveals a trimer, in agreement with the results of analytical ultracentrifugation. We observed open and closed active sites, these being distinguished by movements of proline-1, the catalytic base in the tautomerase reaction. These states correlate with the covalent modification of cysteine 2 to form a mercaptoethanol adduct, an observation confirmed by mass spectrometry. The Plasmodium MIFs have a different pattern of conserved cysteine residues to the mammalian MIFs and the side chain of Cys58, which is implicated in the oxidoreductase activity, is buried. This observation and the evident redox reactivity of Cys2 suggest quite different oxidoreductase characteristics. Finally we show in pull-down assays that Plasmodium MIF binds to the cell surface receptor CD74, a known mammalian MIF receptor implying that parasite MIF has the ability to interfere with, or modulate, host MIF activity through a competitive binding mechanism. (c) 2009 The Protein Society. The crystal structures of macrophage migration inhibition factor (MIF) from Plasmodium falciparum and Plasmodium berghei.,Dobson SE, Augustijn KD, Brannigan JA, Schnick C, Janse CJ, Dodson EJ, Waters AP, Wilkinson AJ Protein Sci. 2009 Oct 13. PMID:19827093[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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