5jb6
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==A simplified BPTI variant containing 23 alanines out of 58 residues== | |
| + | <StructureSection load='5jb6' size='340' side='right' caption='[[5jb6]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5jb6]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JB6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5JB6 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5jb4|5jb4]], [[5jb5|5jb5]], [[5jb7|5jb7]]</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=5jb6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jb6 OCA], [http://pdbe.org/5jb6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5jb6 RCSB], [http://www.ebi.ac.uk/pdbsum/5jb6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5jb6 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/BPT1_BOVIN BPT1_BOVIN]] Inhibits trypsin, kallikrein, chymotrypsin, and plasmin. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | We report a thermodynamic and structural analysis of six extensively simplified bovine pancreatic trypsin inhibitor (BPTI) variants containing 19-24 alanines out of 58 residues. Differential scanning calorimetry indicated a two-state thermal unfolding, typical of a native protein with densely packed interior. Surprisingly, increasing the number of alanines induced enthalpy stabilization, which was however over-compensated by entropy destabilization. X-ray crystallography indicated that the alanine substitutions caused the recruitment of novel water molecules facilitating the formation of protein-water hydrogen bonds and improving the hydration shells around the alanine's methyl groups, both of which presumably contributed to enthalpy stabilization. There was a strong correlation between the number of water molecules and the thermodynamic parameters. Overall, our results demonstrate that, in contrast to our initial expectation, a protein sequence in which over 40% of the residues are alanines can retain a densely packed structure and undergo thermal denaturation with a large enthalpy change, mainly contributed by hydration. | ||
| - | + | Crystal structures of highly simplified BPTIs provide insights into hydration-driven increase of unfolding enthalpy.,Islam MM, Yohda M, Kidokoro SI, Kuroda Y Sci Rep. 2017 Mar 7;7:41205. doi: 10.1038/srep41205. PMID:28266637<ref>PMID:28266637</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: | + | <div class="pdbe-citations 5jb6" style="background-color:#fffaf0;"></div> |
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Islam, M M]] | ||
| + | [[Category: Hydrolase inhibitor]] | ||
| + | [[Category: Proteinase inhibitor]] | ||
Revision as of 12:58, 19 April 2017
A simplified BPTI variant containing 23 alanines out of 58 residues
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