Trinucleotide cassettes increase diversity of T7 phage-displayed peptide library
- National Cancer Institute, Frederick, MD (United States). Center for Cancer Research. Molecular Targets Development Program; National Cancer Institute, Frederick, MD (United States). SAIC-Frederick, Inc.; DOE/OSTI
- National Cancer Institute, Frederick, MD (United States). Center for Cancer Research. Molecular Targets Development Program; National Cancer Institute, Frederick, MD (United States). Werner H. Kirsten Studen Internship Program
- National Cancer Institute, Frederick, MD (United States). Center for Cancer Research. Molecular Targets Development Program
- Argonne National Lab. (ANL), Argonne, IL (United States). Biosciences Division
Background: Amino acid sequence diversity is introduced into a phage-displayed peptide library by randomizing library oligonucleotide DNA. We recently evaluated the diversity of peptide libraries displayed on T7 lytic phage and M13 filamentous phage and showed that T7 phage can display a more diverse amino acid sequence repertoire due to differing processes of viral morphogenesis. Methods: In this study, we evaluated and compared the diversity of a 12-mer T7 phage-displayed peptide library randomized using codon-corrected trinucleotide cassettes with a T7 and an M13 12-mer phage-displayed peptide library constructed using the degenerate codon randomization method. Results: We herein demonstrate that the combination of trinucleotide cassette amino acid codon randomization and T7 phage display construction methods resulted in a significant enhancement to the functional diversity of a 12-mer peptide library. This novel library exhibited superior amino acid uniformity and order-of-magnitude increases in amino acid sequence diversity as compared to degenerate codon randomized peptide libraries. Comparative analyses of the biophysical characteristics of the 12-mer peptide libraries revealed the trinucleotide cassette-randomized library to be a unique resource. Conclusion: The combination of T7 phage display and trinucleotide cassette randomization resulted in a novel resource for the potential isolation of binding peptides for new and previously studied molecular targets.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; National Institutes of Health (NIH)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1626539
- Journal Information:
- BMC Biotechnology (Online), Journal Name: BMC Biotechnology (Online) Journal Issue: 1 Vol. 7; ISSN 1472-6750
- Publisher:
- BioMed CentralCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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