Quantitative codon optimisation of DNA libraries encoding sub-random peptides: design and characterisation of a novel library encoding transmembrane domain peptides.

Ola Larsson, Dorit Thormeyer, Arian Asinger, Björn Wihlén, Claes Wahlestedt, Zicai Liang

Research output: Contribution to journalArticle

2 Scopus citations


Codons for amino acids sharing similar chemical properties seem to cluster on the genetic codon table. Such a geographical distribution of the codons was exploited to create chemically synthesised DNA that encodes peptide libraries containing only a subset of the 20 natural amino acids. The frequency of each amino acid in the subset was further optimised by quantitatively manipulating the ratio of the four phosphoamidites during chemical synthesis of the libraries. Peptides encoded by such libraries show a reduced complexity and could be enriched in peptides of a desired property, which are thus more suitable when screening for functional peptides. Proof of concept for the codon-biased design of peptide libraries was shown by design, synthesis, and characterisation of a transmembrane peptide library that contains >80% transmembrane peptides, representing a 160-fold enrichment compared with a fully randomised library.

Original languageEnglish (US)
Pages (from-to)e133
JournalNucleic acids research
Issue number23
StatePublished - Dec 1 2002
Externally publishedYes


ASJC Scopus subject areas

  • Genetics

Cite this