Abstract
Cyclic peptides are increasingly desired for their enhanced stability and pharmacologic properties. Due to their limited conformational flexibility, cyclic peptides with C-to-N-terminal peptide bond and a disulfide bridge can confer high target binding affinity and resistance to proteolytic enzymes. Challenging drug targets including protein interaction surfaces can be successfully targeted using peptides rather than small molecules or proteins. Peptides, capable of antibody-like affinities with increased potency, can be designed to fill in the gap between small molecules and larger proteins. However, cysteine-rich peptides with several disulfide bonds have limitations in production and purification. Therefore, we devised a strategy to identify cyclic peptides with single disulfide connectivity that offers desired properties along with ease in synthesis and production. Here, de novo design of cyclic peptides is demonstrated through screening of peptide libraries using bacterial display and cell sorting. Herein, a step-by-step protocol is presented to design and screen diverse peptide libraries to identify cyclic peptides with desired specificity and affinity towards arbitrary target proteins.
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Shivange, A.V., Daugherty, P.S. (2015). De Novo Discovery of Bioactive Cyclic Peptides Using Bacterial Display and Flow Cytometry. In: Derda, R. (eds) Peptide Libraries. Methods in Molecular Biology, vol 1248. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-2020-4_10
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DOI: https://doi.org/10.1007/978-1-4939-2020-4_10
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Publisher Name: Humana Press, New York, NY
Print ISBN: 978-1-4939-2019-8
Online ISBN: 978-1-4939-2020-4
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