View source for 9ol7


==Backbone-modified parallel beta hairpin (PBH): wild-type==
<StructureSection load='9ol7' size='340' side='right'caption='[[9ol7]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9ol7]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9OL7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9OL7 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 10 models</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4G6:2-METHYLPROPANE-1,2-DIAMINE'>4G6</scene>, <scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=DPR:D-PROLINE'>DPR</scene></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=9ol7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9ol7 OCA], [https://pdbe.org/9ol7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9ol7 RCSB], [https://www.ebi.ac.uk/pdbsum/9ol7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9ol7 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Peptide backbone N-amination has emerged as a useful strategy to stabilize antiparallel beta-sheet structure. Here, we used circular dichroism and NMR to evaluate the impact of amide-to-hydrazide substitution on the folded population of a parallel beta-hairpin model. Outer-edge N-amination was well tolerated and resulted in enhanced stability relative to N-methylation. High-resolution NMR structures confirmed that the alpha-hydrazino acid residues adopt canonical parallel beta-strand torsions that are compatible with the formation of intraresidue C6 hydrogen bonds involving the hydrazide NH(2) group.

Impact of Strand Edge N-Amination on the Stability of a Parallel beta-Hairpin Fold.,Starnes SK, Horne WS, Del Valle JR J Org Chem. 2025 Nov 20. doi: 10.1021/acs.joc.5c02479. PMID:41264875<ref>PMID:41264875</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9ol7" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Del Valle JR]]
[[Category: Horne WS]]
[[Category: Starnes SK]]