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J Am Chem Soc. 2014 May 14;136(19):6810-3. doi: 10.1021/ja5013849. Epub 2014 May 6.

Design and high-resolution structure of a β³-peptide bundle catalyst.

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1
Department of Chemistry and ‡Department of Molecular, Cellular and Developmental Biology, Yale University , New Haven, Connecticut 06520-8107, United States.

Abstract

Despite the widespread exploration of α-peptides as catalysts, there are few examples of β-peptides that alter the course of a chemical transformation. Our previous work demonstrated that a special class of β(3)-peptides spontaneously self-assembles in water into discrete protein-like bundles possessing unique quaternary structures and exceptional thermodynamic stability. Here we describe a series of β(3)-peptide bundles capable of both substrate binding and chemical catalysis--ester hydrolysis. A combination of kinetic and high-resolution structural analysis suggests an active site triad composed of residues from at least two strands of the octameric bundle structure.

PMID:
24802883
DOI:
10.1021/ja5013849
[Indexed for MEDLINE]

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