Functional Assemblies Emerging in Complex Mixtures of Peptides and Nucleic Acid–Peptide Chimeras

Agata Chotera, Hava Sadihov, Rivka Cohen-Luria, Pierre Alain Monnard, Gonen Ashkenasy*

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Abstrakt

Striking synergy between nucleic acids and proteins is exhibited in living cells. Whether such mutual activity can be performed using simple supramolecular nucleic acid–peptide (NA-pep) architectures remains a mystery. To shed light on this question, we studied the emergence of a primitive synergy in assemblies of short DNA-peptide chimeras. Specifically, we characterized multiple structures forming along gradual mixing trajectory, in which a peptide solution was seeded with increasing amounts of NA-pep chimeras. We report on the systematic change from β-sheet-peptide-based fibrillar architectures into the spherical structures formed by the conjugates. Remarkably, we find that through forming onion-like structures, the conjugates exhibit increased DNA hybridization stability and bind small molecules more efficiently than the peptides or DNA alone. A brief discussion highlights the implications of our findings for the production of new materials and for research on the origin of life.

OriginalsprogEngelsk
TidsskriftChemistry: A European Journal
Vol/bind24
Udgave nummer40
Sider (fra-til)10128-10135
ISSN0947-6539
DOI
StatusUdgivet - 17. jul. 2018

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