Gerling-Driessen UIM, Mujkic-Ninnemann N, Ponader D, Schöne D, Hartmann L, Koksch B, Gerling-Driessen UIM, Schöne D, Koksch B, Ponader D, Mujkic-Ninnemann N, Hartmann L. Exploiting Oligo(amido amine) Backbones for the Multivalent Presentation of Coiled-Coil Peptides.
Biomacromolecules 2015;
16:2394-402. [PMID:
26114337 DOI:
10.1021/acs.biomac.5b00634]
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Abstract
The investigation of coiled coil formation for one mono- and two divalent peptide-polymer conjugates is presented. Through the assembly of the full conjugates on solid support, monodisperse sequence-defined conjugates are obtained with defined positions and distances between the peptide side chains along the polymeric backbone. A heteromeric peptide design was chosen, where peptide K is attached to the polymer backbone, and coiled-coil formation is only expected through complexation with the complementary peptide E. Indeed, the monovalent peptide K-polymer conjugate displays rapid coiled-coil formation when mixed with the complementary peptide E sequence. The divalent systems show intramolecular homomeric coiled-coil formation on the polymer backbone despite the peptide design. Interestingly, this intramolecular assembly undergoes a conformational rearrangement by the addition of the complementary peptide E leading to the formation of heteromeric coiled coil-polymer aggregates. The polymer backbone acts as a template bringing the covalently bound peptide strands in close proximity to each other, increasing the local concentration and inducing the otherwise nonfavorable formation of intramolecular helical assemblies.
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