Solution Phase Conformation and Proteolytic Stability of Amide-Linked Neuraminic Acid Analogues
ABSTRACT Amide‐linked homopolymers of sialic acid offer the advantages of stable secondary structure and increased bioavailability making them useful constructs for pharmaceutical design and drug delivery. Defining the structural characteristics that give rise to secondary structure in aqueous solut...
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Published in | Biopolymers Vol. 99; no. 10; pp. 686 - 696 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Blackwell Publishing Ltd
01.10.2013
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Subjects | |
Online Access | Get full text |
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Summary: | ABSTRACT
Amide‐linked homopolymers of sialic acid offer the advantages of stable secondary structure and increased bioavailability making them useful constructs for pharmaceutical design and drug delivery. Defining the structural characteristics that give rise to secondary structure in aqueous solution is challenging in homopolymeric material due to spectral overlap in NMR spectra. Having previously developed computational tools for heteroologomers with resolved spectra, we now report that application of these methods in combination with circular dichroism, NH/ND NMR exchange rates and nOe data has enabled the structural determination of a neutral, δ‐amide‐linked homopolymer of a sialic acid analogue called Neu2en. The results show that the inherent planarity of the pyranose ring in Neu2en brought about by the α,δ‐conjugated amide bond serves as the primary driving force of the overall conformation of the homooligomer. This peptide surrogate has an excellent bioavailability profile, with half‐life of ∼12 h in human blood serum, which offers a viable peptide scaffold that is resistant to proteolytic degradation. Furthermore, a proof‐of‐principle study illustrates that Neu2en oligomers are functionalizable with small molecule ligands using 1,3‐dipolar cycloaddition chemistry. © 2013 Wiley Periodicals, Inc. Biopolymers 99: 686–696, 2013. |
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Bibliography: | Washington State University Startup; University of Arizona; Murdock Charitable Trust ark:/67375/WNG-LF199KS4-6 NSF - No. CHE-0518010; CHE-0196482; CHE-0443516; DBI-0722538; OSTI 97-24412; CHE-9115282; DBI-9604689 istex:8C2AEB4BE4DCF7AF96B4FBE60E95E1426DF87066 ArticleID:BIP22315 NIH - No. RR11973; RR0631401; RR12948 This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Current address: 3M, 3M Center, St. Paul, Minnesota 55144 Current address: Sutro Biopharma Inc., South San Francisco, California 94080 |
ISSN: | 0006-3525 1097-0282 |
DOI: | 10.1002/bip.22315 |