View source for 2gdg


==Crystal structure of covalently modified macrophage inhibitory factor==
<StructureSection load='2gdg' size='340' side='right'caption='[[2gdg]], [[Resolution|resolution]] 1.45&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2gdg]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2GDG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2GDG FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.45&#8491;</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=2gdg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2gdg OCA], [https://pdbe.org/2gdg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2gdg RCSB], [https://www.ebi.ac.uk/pdbsum/2gdg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2gdg ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MIF_MOUSE MIF_MOUSE] Pro-inflammatory cytokine. Involved in the innate immune response to bacterial pathogens. The expression of MIF at sites of inflammation suggests a role as mediator in regulating the function of macrophages in host defense. Counteracts the anti-inflammatory activity of glucocorticoids. Has phenylpyruvate tautomerase and dopachrome tautomerase activity (in vitro), but the physiological substrate is not known. It is not clear whether the tautomerase activity has any physiological relevance, and whether it is important for cytokine activity (By similarity).
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/gd/2gdg_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2gdg ConSurf].
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== Publication Abstract from PubMed ==
Macrophage migration inhibitory factor (MIF) is an important immunoregulatory protein that has been implicated in several inflammatory diseases. MIF also has a phenylpyruvate tautomerase (PPT) activity, the role of which remains elusive in these biological activities. The acetylene compound, 2-oxo-4-phenyl-3-butynoate (2-OPB), has been synthesized and tested as a potential irreversible inhibitor of its enzymatic activity. Incubation of the compound with MIF results in the rapid and irreversible loss of the PPT activity. Mass spectral analysis established that the amino-terminal proline, previously implicated as a catalytic base in the PPT-catalyzed reaction, is the site of covalent modification. Inactivation of the PPT activity likely occurs by a Michael addition of Pro-1 to C-4 of the inhibitor. Attempts to crystallize the inactivated complex to confirm the structure of the adduct on the covalently modified Pro-1 by X-ray crystallography were not successful. Nor was it possible to unambiguously interpret electron density observed in the active sites of the native crystals soaked with the inhibitor. This may be due to crystal packing in that the side chain of Glu-16 from an adjacent trimer occupies one active site. However, this crystal contact may be partially responsible for the high-resolution quality of these MIF crystals. Nonetheless, because MIF is a member of the tautomerase superfamily, a group of structurally homologous proteins that share a beta-alpha-beta structural motif and a catalytic Pro-1, 2-OPB may find general use as a probe of tautomerase superfamily members that function as PPTs.

Inactivation of the phenylpyruvate tautomerase activity of macrophage migration inhibitory factor by 2-oxo-4-phenyl-3-butynoate.,Golubkov PA, Johnson WH Jr, Czerwinski RM, Person MD, Wang SC, Whitman CP, Hackert ML Bioorg Chem. 2006 Aug;34(4):183-99. Epub 2006 Jun 14. PMID:16780921<ref>PMID:16780921</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Macrophage inhibitory factor 3D structures|Macrophage inhibitory factor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Mus musculus]]
[[Category: Golubkov PA]]
[[Category: Hackert ML]]