1. Full incorporation of the noncanonical amino acid hydroxylysine as a surrogate for lysine in green fluorescent protein
- Author
-
Philip Hartz, Florent Grimm, Marc Finkler, Sina Ravanbodshirazi, and Albrecht Ott
- Subjects
Clinical Biochemistry ,Lysine ,Green Fluorescent Proteins ,Pharmaceutical Science ,01 natural sciences ,Biochemistry ,Hydroxylysine ,Green fluorescent protein ,chemistry.chemical_compound ,Protein sequencing ,Drug Discovery ,Escherichia coli ,Escherichia coli cell extract ,Cell-free expression ,Amino Acid Sequence ,Molecular Biology ,chemistry.chemical_classification ,010405 organic chemistry ,Noncanonical amino acid ,Organic Chemistry ,Translation (biology) ,Gene Expression Regulation, Bacterial ,In vitro ,0104 chemical sciences ,Amino acid ,010404 medicinal & biomolecular chemistry ,chemistry ,Amino Acid Substitution ,Molecular Medicine ,Proofreading - Abstract
The canonical set of amino acids leads to an exceptionally wide range of protein functionality, nevertheless, this set still exhibits limitations. The incorporation of noncanonical amino acids into proteins can enlarge its functional scope. Although proofreading will counteract the charging of tRNAs with other amino acids than the canonical ones, the translation machinery may still accept noncanonical amino acids as surrogates and incorporate them at the canonically prescribed locations within the protein sequence. Here, we use a cell-free expression system to demonstrate the full replacement of l-lysine by l-hydroxylysine at all lysine sites of recombinantly produced GFP. In vivo, as a main component of collagen, post-translational l-hydroxylysine generation enables the formation of cross-links. Our work represents a first step towards in vitro production of (modified) collagens, more generally of proteins that can easily be crosslinked.
- Published
- 2022
- Full Text
- View/download PDF