Sequence-specific, dynamic covalent crosslinking in aqueous media.

Sequence-specific, dynamic covalent crosslinking in aqueous media. Research Abstract Details 

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Sequence-specific, dynamic covalent crosslinking in aqueous media. Abstract Text:

Minfeng Li,Kazuhiro Yamato,Joseph S Ferguson,Kiran Kumar Singarapu,Thomas Szyperski,Bing Gong,Minfeng Li,Kazuhiro Yamato,Joseph S Ferguson,Kiran Kumar Singarapu,Thomas Szyperski,Bing Gong,

This article describes an associating system that integrates the specificity of multiple hydrogen bonding and the strength of dynamic covalent interactions. Linear oligoamides that sequence-specifically pair into H-bonded duplexes in nonpolar solvents were modified with S-trityl groups, allowing the reversible formation of disulfide bonds. The disulfide-crosslinking reactions of oligoamides capable of pairing via two, four, and six intermolecular H-bonds, along with several control strands, were examined using ESI, MALDI-TOF, reverse phase HPLC, and two-dimensional NMR. Results from these studies demonstrate that this system possesses both the high fidelity of multiply H-bonded assemblies and the high stability of covalent interaction, leading to the sequence-specific crosslinking of complementary oligoamides in not only nonpolar (methylene chloride) solutions but also highly competitive (aqueous) media. Experiments were designed to systematically probe the mechanism behind the specific formation of the sequence-matched products, which revealed a thermodymically controlled process. Multiple pairs in the same solution were crosslinked in a sequence-specific fashion. In addition, a length-dependent selectivity was also observed. Thus, oligoamides with different lengths or sequences did not crosslink into mismatched products. As few as two H-bonds is sufficient to bias the specific formation of the crosslinked product in aqueous media, suggesting that associating units with tunable sizes, high stability, and high specificity can be conveniently designed. The combination of H-bonding and dynamic covalent interactions represents a new, generalizable strategy for developing highly specific molecular associating units that are stable in a wide variety of media. These associating units will greatly facilitate the construction of various structures with many applications.

Sequence-specific, dynamic covalent crosslinking in aqueous media. Publishing Authors By Initials

M Li,K Yamato,JS Ferguson,KK Singarapu,T Szyperski,B Gong,M Li,K Yamato,JS Ferguson,KK Singarapu,T Szyperski,B Gong,

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Sequence-specific, dynamic covalent crosslinking in aqueous media. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of the American Chemical Society

VOLUME: 130

Page Numbers: 491-500

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 1520-5126

DAY: 20

MONTH: 12

YEAR: 2007

Sequence-specific, dynamic covalent crosslinking in aqueous media. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Sequence-specific, dynamic covalent crosslinking in aqueous media.

AFFILIATION: Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260.

Country: United States

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MEDLINETA: J Am Chem Soc

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