1yp7: Difference between revisions
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[[Image: | ==Van der Waals Interactions Dominate Hydrophobic Association in a Protein Binding Site Occluded From Solvent Water== | ||
<StructureSection load='1yp7' size='340' side='right' caption='[[1yp7]], [[Resolution|resolution]] 2.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1yp7]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YP7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1YP7 FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CD:CADMIUM+ION'>CD</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1yp6|1yp6]]</td></tr> | |||
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MUP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])</td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1yp7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yp7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1yp7 RCSB], [http://www.ebi.ac.uk/pdbsum/1yp7 PDBsum]</span></td></tr> | |||
<table> | |||
== 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/yp/1yp7_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/chain_selection.php?pdb_ID=2ata ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
In the present study we examine the enthalpy of binding of 2-methoxy-3-isobutylpyrazine (IBMP) to the mouse major urinary protein (MUP), using a combination of isothermal titration calorimetry (ITC), NMR, X-ray crystallography, all-atom molecular dynamics simulations, and site-directed mutagenesis. Global thermodynamics data derived from ITC indicate that binding is driven by favorable enthalpic contributions, rather than a classical entropy-driven signature that might be expected given that the binding pocket of MUP-1 is very hydrophobic. The only ligand-protein hydrogen bond is formed between the side-chain hydroxyl of Tyr120 and the ring nitrogen of the ligand in the wild-type protein. ITC measurements on the binding of IBMP to the Y120F mutant demonstrate a reduced enthalpy of binding, but nonetheless binding is still enthalpy dominated. A combination of solvent isotopic substitution ITC measurements and all-atom molecular dynamics simulations with explicit inclusion of solvent water suggests that solvation is not a major contributor to the overall binding enthalpy. Moreover, hydrogen/deuterium exchange measurements suggest that there is no significant contribution to the enthalpy of binding derived from "tightening" of the protein structure. Data are consistent with binding thermodynamics dominated by favorable dispersion interactions, arising from the inequality of solvent-solute dispersion interactions before complexation versus solute-solute dispersion interactions after complexation, by virtue of poor solvation of the binding pocket. | |||
Van der Waals interactions dominate ligand-protein association in a protein binding site occluded from solvent water.,Barratt E, Bingham RJ, Warner DJ, Laughton CA, Phillips SE, Homans SW J Am Chem Soc. 2005 Aug 24;127(33):11827-34. PMID:16104761<ref>PMID:16104761</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | |||
< | |||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Barratt, E.]] | [[Category: Barratt, E.]] | ||
Revision as of 00:03, 30 September 2014
Van der Waals Interactions Dominate Hydrophobic Association in a Protein Binding Site Occluded From Solvent WaterVan der Waals Interactions Dominate Hydrophobic Association in a Protein Binding Site Occluded From Solvent Water
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedIn the present study we examine the enthalpy of binding of 2-methoxy-3-isobutylpyrazine (IBMP) to the mouse major urinary protein (MUP), using a combination of isothermal titration calorimetry (ITC), NMR, X-ray crystallography, all-atom molecular dynamics simulations, and site-directed mutagenesis. Global thermodynamics data derived from ITC indicate that binding is driven by favorable enthalpic contributions, rather than a classical entropy-driven signature that might be expected given that the binding pocket of MUP-1 is very hydrophobic. The only ligand-protein hydrogen bond is formed between the side-chain hydroxyl of Tyr120 and the ring nitrogen of the ligand in the wild-type protein. ITC measurements on the binding of IBMP to the Y120F mutant demonstrate a reduced enthalpy of binding, but nonetheless binding is still enthalpy dominated. A combination of solvent isotopic substitution ITC measurements and all-atom molecular dynamics simulations with explicit inclusion of solvent water suggests that solvation is not a major contributor to the overall binding enthalpy. Moreover, hydrogen/deuterium exchange measurements suggest that there is no significant contribution to the enthalpy of binding derived from "tightening" of the protein structure. Data are consistent with binding thermodynamics dominated by favorable dispersion interactions, arising from the inequality of solvent-solute dispersion interactions before complexation versus solute-solute dispersion interactions after complexation, by virtue of poor solvation of the binding pocket. Van der Waals interactions dominate ligand-protein association in a protein binding site occluded from solvent water.,Barratt E, Bingham RJ, Warner DJ, Laughton CA, Phillips SE, Homans SW J Am Chem Soc. 2005 Aug 24;127(33):11827-34. PMID:16104761[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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