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  Two-Dimensional Folding of Polypeptides into Molecular Nanostructures at Surfaces

Rauschenbach, S., Rinke, G., Gutzler, R., Abb, S., Albarghash, A., Le, D., et al. (2017). Two-Dimensional Folding of Polypeptides into Molecular Nanostructures at Surfaces. ACS Nano, 11(3), 2420-2427.

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Rauschenbach, S.1, Autor           
Rinke, G., Autor
Gutzler, R., Autor
Abb, S., Autor
Albarghash, A., Autor
Le, D., Autor
Rahman, T., Autor
Durr, M., Autor
Harnau, L., Autor
Kern, K.1, Autor           
Affiliations:
1Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370481              

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Schlagwörter: peptides; surfaces; folding; scanning tunneling microscopy; electrospray ion beam deposition
 Zusammenfassung: Herein we report the fabrication of molecular nanostructures on surfaces via two-dimensional (2D) folding of the nine amino acid peptide bradykinin. Soft-landing electrospray ion beam deposition in conjunction with high-resolution imaging by scanning tunneling microscopy is used to fabricate and investigate the molecular nanostructures. Subnanometer resolved images evidence the large conformational freedom of the molecules if thermal motion is inhibited and the formation of stable uniform dimers of only one specific conformation when diffusion can take place. Molecular dynamics modeling supported by density functional theory calculations give atomically precise insight into the induced-fit binding scheme when the folded dimer is formed. In the absence of solvent, we find a hierarchy of binding strength from polar to nonpolar, manifested in an inverted polar nonpolar segregation which suppresses unspecific interactions at the rim of the nanostructure. The demonstrated 2D-folding scheme resembles many key properties of its native 3D counterpart and shows that functional, molecular nanostructures on surfaces fabricated by folding could be just as versatile and specific.

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Sprache(n): eng - English
 Datum: 2017
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: eDoc: 734874
ISI: 000398014900009
 Art des Abschluß: -

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Titel: ACS Nano
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: WASHINGTON : AMER CHEMICAL SOC
Seiten: - Band / Heft: 11 (3) Artikelnummer: - Start- / Endseite: 2420 - 2427 Identifikator: ISSN: 1936-0851