|
|
| (One intermediate revision not shown.) |
| Line 3: |
Line 3: |
| | <StructureSection load='4odo' size='340' side='right'caption='[[4odo]], [[Resolution|resolution]] 1.60Å' scene=''> | | <StructureSection load='4odo' size='340' side='right'caption='[[4odo]], [[Resolution|resolution]] 1.60Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4odo]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ODO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ODO FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4odo]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ODO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ODO FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BTB:2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>BTB</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FK5:8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN'>FK5</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.599Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4odk|4odk]], [[4odl|4odl]], [[4odm|4odm]], [[4odn|4odn]], [[4odp|4odp]], [[4odq|4odq]], [[4odr|4odr]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BTB:2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>BTB</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FK5:8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN'>FK5</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Peptidylprolyl_isomerase Peptidylprolyl isomerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.2.1.8 5.2.1.8] </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=4odo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4odo OCA], [https://pdbe.org/4odo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4odo RCSB], [https://www.ebi.ac.uk/pdbsum/4odo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4odo ProSAT]</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=4odo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4odo OCA], [http://pdbe.org/4odo PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4odo RCSB], [http://www.ebi.ac.uk/pdbsum/4odo PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4odo ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| - | <div style="background-color:#fffaf0;">
| + | == Function == |
| - | == Publication Abstract from PubMed == | + | [https://www.uniprot.org/uniprot/Q5SLE7_THET8 Q5SLE7_THET8] |
| - | BACKGROUND: Peptidyl-prolyl isomerases (PPIases) catalyze cis/trans isomerization of peptidyl-prolyl bonds, which is often rate-limiting for protein folding. SlyD is a two-domain enzyme containing both a PPIase FK506-binding protein (FKBP) domain and an insert-in-flap (IF) chaperone domain. To date, the interactions of these domains with unfolded proteins have remained rather obscure, with structural information on binding to the FKBP domain being limited to complexes involving various inhibitor compounds or a chemically modified tetrapeptide. RESULTS: We have characterized the binding of 15-residue-long unmodified peptides to SlyD from Thermus thermophilus (TtSlyD) in terms of binding thermodynamics and enzyme kinetics through the use of isothermal titration calorimetry, nuclear magnetic resonance spectroscopy, and site-directed mutagenesis. We show that the affinities and enzymatic activity of TtSlyD towards these peptides are much higher than for the chemically modified tetrapeptides that are typically used for activity measurements on FKBPs. In addition, we present a series of crystal structures of TtSlyD with the inhibitor FK506 bound to the FKBP domain, and with 15-residue-long peptides bound to either one or both domains, which reveals that substrates bind in a highly adaptable fashion to the IF domain through beta-strand augmentation, and can bind to the FKBP domain as both types VIa1 and VIb-like cis-proline beta-turns. Our results furthermore provide important clues to the catalytic mechanism and support the notion of inter-domain cross talk. CONCLUSIONS: We found that 15-residue-long unmodified peptides can serve as better substrate mimics for the IF and FKBP domains than chemically modified tetrapeptides. We furthermore show how such peptides are recognized by each of these domains in TtSlyD, and propose a novel general model for the catalytic mechanism of FKBPs that involves C-terminal rotation around the peptidyl-prolyl bond mediated by stabilization of the twisted transition state in the hydrophobic binding site.
| + | |
| - | | + | |
| - | Molecular insights into substrate recognition and catalytic mechanism of the chaperone and FKBP peptidyl-prolyl isomerase SlyD.,Quistgaard EM, Weininger U, Ural-Blimke Y, Modig K, Nordlund P, Akke M, Low C BMC Biol. 2016 Sep 23;14(1):82. PMID:27664121<ref>PMID:27664121</ref>
| + | |
| - | | + | |
| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
| + | |
| - | </div>
| + | |
| - | <div class="pdbe-citations 4odo" style="background-color:#fffaf0;"></div>
| + | |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[Peptidyl-prolyl cis-trans isomerase|Peptidyl-prolyl cis-trans isomerase]] | + | *[[Peptidyl-prolyl cis-trans isomerase 3D structures|Peptidyl-prolyl cis-trans isomerase 3D structures]] |
| - | == References ==
| + | |
| - | <references/>
| + | |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Peptidylprolyl isomerase]] | + | [[Category: Thermus thermophilus]] |
| - | [[Category: Low, C]] | + | [[Category: Low C]] |
| - | [[Category: Nordlund, P]] | + | [[Category: Nordlund P]] |
| - | [[Category: Quistgaard, E M]] | + | [[Category: Quistgaard EM]] |
| - | [[Category: Chaperone]]
| + | |
| - | [[Category: Fkbp domain]]
| + | |
| - | [[Category: If domain]]
| + | |
| - | [[Category: Isomerase]]
| + | |
| - | [[Category: Peptidyl-prolyl isomerase]]
| + | |
| - | [[Category: Ppiase]]
| + | |
