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TitleCryo-EM Visualization of Intermolecular π-Electron Interactions within π-Conjugated Peptidic Supramolecular Polymers.
Journal, issue, pagesACS Macro Lett, Vol. 14, Issue 8, Page 1100-1106, Year 2025
Publish dateAug 19, 2025
AuthorsShane T Rich-New / Runlai Wang / Ayisha Zia / Fengbin Wang / John D Tovar /
PubMed AbstractThe 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.
External linksACS Macro Lett / PubMed:40686463
MethodsEM (helical sym.)
Resolution2.9 - 3.2 Å
Structure data

70201

9o7j

EMDB-70201, PDB-9o7j:
Cryo-EM of VEVAG Peptide 1
Method: EM (helical sym.) / Resolution: 3.2 Å

70202

9o7k

EMDB-70202, PDB-9o7k:
Cryo-EM of pi-conjugated Peptide 2 (9 strands)
Method: EM (helical sym.) / Resolution: 2.9 Å

70203

9o7l

EMDB-70203, PDB-9o7l:
Cryo-EM of pi-conjugated Peptide 2 (6 strands)
Method: EM (helical sym.) / Resolution: 3.2 Å

Chemicals

PDB-1b9y:
STRUCTURAL ANALYSIS OF PHOSDUCIN AND ITS PHOSPHORYLATION-REGULATED INTERACTION WITH TRANSDUCIN BETA-GAMMA

PDB-1b9z:
BACILLUS CEREUS BETA-AMYLASE COMPLEXED WITH MALTOSE

Source
  • synthetic construct (others)
KeywordsPROTEIN FIBRIL / peptide fiber / helical polymer

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