Engineering an affinity tag for genetically encoded cyclic peptides

Todd A. Naumann, Sergey N. Savinov, Stephen J. Benkovic

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Peptide expression libraries are valuable probes of cellular function. SICLOPPS technology merges the principal advantages of both genetic methods and small-molecule approaches in yielding superior library sizes of operationally stable, structurally well-defined entities with an established biological and medicinal record. Here, we describe development, application, and the first-generation library implementation of an expressed affinity tag for a library of cyclic peptides. A tripeptide streptavidin-binding motif (HPQ) proved to be compatible with presentation from a backbone cyclized template. A resulting peptide was employed as a sensitive indicator of peptide splicing, expression, and recovery as well as an affinity tag for one-step purification. Specific recognition of the tag by streptavidin was also critical for an analysis of intein mutants. Finally, the initially identified probe was used as a template for design of a streptavidin-responsive cyclic peptide library.

Original languageEnglish (US)
Pages (from-to)820-830
Number of pages11
JournalBiotechnology and bioengineering
Issue number7
StatePublished - Dec 30 2005

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology


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