Facile Display of Homomultivalent Proteins for In Vitro Selections

Ayako Ohoka, Casim A. Sarkar

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Low-affinity protein binders are emerging as valuable domains for therapeutic applications because of their higher specificity when presented in multivalent ligands that increase the overall strength and selectivity of receptor binding. De novo discovery of low-affinity binders would be enhanced by the large library sizes attainable with in vitro selection systems, but these platforms generally maximize recovery of high-affinity monovalent binders. Here, we present a facile technology that uses rolling circle amplification to create homomultivalent libraries. We show proof of principle of this approach in ribosome display with off-rate selections of a bivalent ligand against monovalent and bivalent targets, thereby demonstrating high enrichment (up to 166-fold) against a low-affinity target that is bivalent but not monovalent. This approach to homomultivalent library construction can be applied to any binder tolerant of N- and C-terminal fusions and provides a platform for performing in vitro display selections with controlled protein valency and orientation.

Original languageEnglish (US)
Pages (from-to)634-638
Number of pages5
JournalACS Synthetic Biology
Volume12
Issue number2
DOIs
StatePublished - Feb 17 2023

Bibliographical note

Funding Information:
We thank Dr. Igor Dodevski for helpful discussions and Dr. Wesley Errington for assistance with MVsim simulations. This work was supported by a NSF Graduate Research Fellowship and a University of Minnesota Doctoral Dissertation Fellowship (A.O.) and NIH grants R21EB022258 and R35GM136309 (C.A.S.).

Publisher Copyright:
© 2023 American Chemical Society.

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

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