Molecular duplexes with encoded sequences and stabilities

Accounts of Chemical Research
Bing Gong

Abstract

Through specific molecular shapes and repeating polymeric sequences, biomacromolecules encode information about both structure and function. Inspired by DNA molecules, we have conceived a strategy to encode linear molecular strands with sequences that specify intermolecular association, and we and our collaborators have supported this idea through our experimental work. This Account summarizes the design and development of a class of molecular duplexes with programmable hydrogen-bonding sequences and adjustable stabilities. The specific system involves oligoamide strands synthesized from readily available monomeric modules based on standard amide (peptide) chemistry. By covalently linking three types of basic building blocks in different orders, we create oligoamide strands with various arrangements of amide O and H atoms that provide arrays of hydrogen bonding sequences. Because one of the two edges of these molecules presents the sequences of hydrogen-bond donors and acceptors, these oligoamide strands associate via their hydrogen-bonding edges into double-stranded pairs or duplexes. Systematic studies have demonstrated the strict sequence specificity and tunable stability of this system. These structurally simple duplexes ex...Continue Reading

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