National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM138756
米国
引用
ジャーナル: ACS Macro Lett / 年: 2025 タイトル: Cryo-EM Visualization of Intermolecular π-Electron Interactions within π-Conjugated Peptidic Supramolecular Polymers. 著者: Shane T Rich-New / Runlai Wang / Ayisha Zia / Fengbin Wang / John D Tovar / 要旨: The self-assembly of "π-peptides" - molecules with π-electron cores substituted with two or more oligopeptide chains - brings organic electronic function into biologically relevant nanomaterials. ...The self-assembly of "π-peptides" - molecules with π-electron cores substituted with two or more oligopeptide chains - brings organic electronic function into biologically relevant nanomaterials. π-Peptides assemble into fibrillar nanomaterials as driven by enthalpic peptide-based hydrogen bonding networks and pi-core-based quadrupolar interactions. A large body of spectroscopic, morphological and computational studies informs on the nature of the self-assembly process and the resulting nanostructures, but detailed structural information has remained elusive. Inspired by the recent use of cryogenic electron microscopy (cryo-EM) to provide high-resolution structures for synthetic peptide nanomaterials, we present here the use of cryo-EM to offer ca. 3 Å resolution of π-peptide nanomaterial assemblies, visualizing for the first time the nature of the intermolecular π-core electronic interactions responsible for energy transport through these supramolecular materials.