Download MendeleyA Synthetic Adenylation-Domain-Based tRNA-Aminoacylation Catalyst.
Giessen, T.W., Altegoer, F., Nebel, A.J., Steinbach, R.M., Bange, G., Marahiel, M.A.(2015) Angew Chem Int Ed Engl 54: 2492-2496
- PubMed: 25583137
- DOI: https://doi.org/10.1002/anie.201410047
- Primary Citation of Related Structures:
4R1J - PubMed Abstract:
The incorporation of non-proteinogenic amino acids represents a major challenge for the creation of functionalized proteins. The ribosomal pathway is limited to the 20-22 proteinogenic amino acids while nonribosomal peptide synthetases (NRPSs) are able to select from hundreds of different monomers. Introduced herein is a fusion-protein-based design for synthetic tRNA-aminoacylation catalysts based on combining NRPS adenylation domains and a small eukaryotic tRNA-binding domain (Arc1p-C). Using rational design, guided by structural insights and molecular modeling, the adenylation domain PheA was fused with Arc1p-C using flexible linkers and achieved tRNA-aminoacylation with both proteinogenic and non-proteinogenic amino acids. The resulting aminoacyl-tRNAs were functionally validated and the catalysts showed broad substrate specificity towards the acceptor tRNA. Our strategy shows how functional tRNA-aminoacylation catalysts can be created for bridging the ribosomal and nonribosomal worlds. This opens up new avenues for the aminoacylation of tRNAs with functional non-proteinogenic amino acids.
Organizational Affiliation:
Department of Chemistry, Philipps-University Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg (Germany); LOEWE Center for Synthetic Microbiology (Synmikro), Philipps-University Marburg, Hans-Meerwein-Strasse, 35032 Marburg (Germany). tobias.giessen@chemie.uni-marburg.de.
