Artificial proteins can be engineered to exhibit interesting solid state, liquid crystal or interfacial properties and may ultimately serve as important alternatives to conventional polymeric materials. The utility of protein-based materials is limited, however, by the availability of just the
The very strong helical propensity of peptides rich in alpha-aminoisobutyric acid (Aib) has enabled the design of a set of helices containing as guest amino acids one fluorescent chromophore, beta-(1'-naphthyl)-L-alanine, and one heavy atom perturber, p-bromo-L-phenylalanine. The fluorescence of the
Proceedings of the National Academy of Sciences of the United States of America, 103(17), 6483-6488 (2006-04-19)
Recently, tRNA aminoacyl-tRNA synthetase pairs have been evolved that allow one to genetically encode a large array of unnatural amino acids in both prokaryotic and eukaryotic organisms. We have determined the crystal structures of two substrate-bound Methanococcus jannaschii tyrosyl aminoacyl-tRNA
It has previously been demonstrated that the unnatural amino acid p-Cl-phenylalanine can be attached to tRNA(Phe) by a modified phenylalanyl-tRNA synthetase with relaxed amino acid substrate specificity. We show that this modification to the translational machinery of Escherichia coli is
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