2fke

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[[Image:2fke.jpg|left|200px]]<br /><applet load="2fke" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2fke, resolution 1.72&Aring;" />
 
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'''FK-506-BINDING PROTEIN: THREE-DIMENSIONAL STRUCTURE OF THE COMPLEX WITH THE ANTAGONIST L-685,818'''<br />
 
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==Overview==
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==FK-506-BINDING PROTEIN: THREE-DIMENSIONAL STRUCTURE OF THE COMPLEX WITH THE ANTAGONIST L-685,818==
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L-685,818 differs only slightly in structure from the immunosuppressive, drug FK-506, and both compounds bind with comparable affinity to the, 12-kDa FK-506-binding protein (FKBP12), the major intracellular receptor, for the drug. Despite these similarities, L-685,818 is a potent antagonist, of both the immunosuppressive and toxic effects of the drug. Here, we, present a structural analysis of this problem. Although FK-506 and, L-685,818 differ greatly in pharmacology, we have found that the, three-dimensional structures of their complexes with FKBP12 are, essentially identical. Approximately half of each ligand is in contact, with the receptor protein, and half is exposed to solvent; the exposed, region includes the two sites where the compounds differ. These results, indicate that the profound differences in the pharmacology of these two, compounds are not caused by any difference in their interaction with, FKBP12. Rather, these effects arise because relatively minor changes in, the exposed part of a bound ligand have a strong effect on how, FKBP12-ligand complexes interact with calcineurin, their putative, intracellular target. In addition, FK-506 complexes with FKBP12 proteins, from several species all inhibit mammalian calcineurin. Analysis of the, three-dimensional structure of the complex with respect to residues, conserved among these proteins suggests a small number of surface residues, near the bound ligands that may play a critical role in interactions, between the protein-drug complex and calcineurin.
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<StructureSection load='2fke' size='340' side='right'caption='[[2fke]], [[Resolution|resolution]] 1.72&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2fke]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FKE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FKE FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.72&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FK5:8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN'>FK5</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2fke FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fke OCA], [https://pdbe.org/2fke PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2fke RCSB], [https://www.ebi.ac.uk/pdbsum/2fke PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2fke ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/FKB1A_HUMAN FKB1A_HUMAN] Keeps in an inactive conformation TGFBR1, the TGF-beta type I serine/threonine kinase receptor, preventing TGF-beta receptor activation in absence of ligand. Recruites SMAD7 to ACVR1B which prevents the association of SMAD2 and SMAD3 with the activin receptor complex, thereby blocking the activin signal. May modulate the RYR1 calcium channel activity. PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides.<ref>PMID:9233797</ref> <ref>PMID:16720724</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fk/2fke_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2fke ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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2FKE is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=FK5:'>FK5</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FKE OCA].
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*[[FKBP 3D structures|FKBP 3D structures]]
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== References ==
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==Reference==
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<references/>
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FK-506-binding protein: three-dimensional structure of the complex with the antagonist L-685,818., Becker JW, Rotonda J, McKeever BM, Chan HK, Marcy AI, Wiederrecht G, Hermes JD, Springer JP, J Biol Chem. 1993 May 25;268(15):11335-9. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7684380 7684380]
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Becker, J.W.]]
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[[Category: Becker JW]]
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[[Category: Mckeever, B.M.]]
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[[Category: Mckeever BM]]
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[[Category: Rotonda, J.]]
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[[Category: Rotonda J]]
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[[Category: FK5]]
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[[Category: cis-trans isomerase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri Feb 15 17:25:35 2008''
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Current revision

FK-506-BINDING PROTEIN: THREE-DIMENSIONAL STRUCTURE OF THE COMPLEX WITH THE ANTAGONIST L-685,818

PDB ID 2fke

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