Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published March 12, 2018 | Supplemental Material
Journal Article Open

Epitope-Targeted Macrocyclic Peptide Ligand with Picomolar Cooperative Binding to Interleukin-17F


The IL-17 cytokine family is associated with multiple immune and autoimmune diseases and comprises important diagnostic and therapeutic targets. This work reports the development of epitope-targeted ligands designed for differential detection of human IL-17F and its closest homologue IL-17A. Non-overlapping and unique epitopes on IL-17F and IL-17A were identified by comparative sequence analysis of the two proteins. Synthetic variants of these epitopes were utilized as targets for in situ click screens against a comprehensive library of synthetic peptide macrocycles with 5-mer variable regions. Single generation screens yielded selective binders for IL-17F and IL-17A with low cross-reactivity. Macrocyclic peptide binders against two distinct IL-17F epitopes were coupled using variable length chemical linkers to explore the physical chemistry of cooperative binding. The optimized linker length yielded a picomolar affinity binder, while retaining high selectivity. The presented method provides a rational approach towards targeting discontinuous epitopes, similar to what is naturally achieved by many B cell receptors.

Additional Information

© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Manuscript received: October 8, 2017; Accepted manuscript online: January 10, 2018; First published: 19 February 2018. This research was partially supported by the Institute for Collaborative Biotechnologies through grant W911NF‐09‐D‐0001 from the U.S. Army Research Office. We thank the Protein/Peptide Micro Analytical Laboratory at Caltech for Edman sequencing. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. The Government had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Conflict of interest: J.R.H. is a founder and consultant/advisory board member of Indi Molecular, Inc.

Attached Files

Supplemental Material - chem201704752-sup-0001-misc_information.pdf


Files (2.1 MB)
Name Size Download all
2.1 MB Preview Download

Additional details

August 19, 2023
October 18, 2023