9ehn

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Current revision (09:19, 4 June 2025) (edit) (undo)
 
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'''Unreleased structure'''
 
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The entry 9ehn is ON HOLD until Paper Publication
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==Co-MAHF-9 A8T Metal Alpha-Helix Framework==
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<StructureSection load='9ehn' size='340' side='right'caption='[[9ehn]], [[Resolution|resolution]] 0.98&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[9ehn]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9EHN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9EHN 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]] 0.98&#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=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=AIB:ALPHA-AMINOISOBUTYRIC+ACID'>AIB</scene>, <scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene>, <scene name='pdbligand=NH2:AMINO+GROUP'>NH2</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=9ehn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9ehn OCA], [https://pdbe.org/9ehn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9ehn RCSB], [https://www.ebi.ac.uk/pdbsum/9ehn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9ehn ProSAT]</span></td></tr>
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</table>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Metal-peptide frameworks (MPFs) are a growing class of metal-organic frameworks with promising applications in metalloprotein mimicry, chiral separations, and catalysis. There are limited examples of MPFs, especially those with both secondary structure and natural amino acid side chains that coordinate to metal nodes, which are important for accurately mimicking metalloprotein active sites. Here, we design a robust and modular strategy based on short alpha-helical peptides (nine amino acids long) to form frameworks with many types of biomimetic metal sites. Peptides were designed to have Glu and His metal-binding residues, hydrophobic residues, and noncanonical helix-enforcing residues. With Co(II), it was shown that mutagenesis of a single amino acid near the metal-binding residues generates a diverse library of frameworks with varying metal node coordination geometries and compositions. Structures for 16 out of 20 variants were characterized by single-crystal X-ray diffraction, revealing how noncovalent interactions impact the metal primary sphere. In one case, a point mutation turns on reversible ligand-triggered conformational changes, demonstrating that this platform allows for dynamic behavior like that observed in metalloproteins. Furthermore, we show that frameworks readily assemble with Mn(II), Fe(II), Cu(II), and Zn(II) ions, highlighting the generality of this approach. The ease-of-synthesis, modularity, and crystallinity of these materials make this a highly accessible platform for studying and engineering biomimetic metal centers in porous materials.
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Authors:
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, PMID:40328673<ref>PMID:40328673</ref>
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Description:
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Unreleased Structures]]
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</div>
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<div class="pdbe-citations 9ehn" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Synthetic construct]]
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[[Category: Richardson-Matthews RM]]

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Co-MAHF-9 A8T Metal Alpha-Helix Framework

PDB ID 9ehn

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