Abstract: The present invention provides in certain embodiments comprising a pyrrolysine-based aminoacyl-tRNA synthetase and a tRNA to form a pyrrolysine-based aminoacyl-tRNA synthetase/tRNA pair. The present invention also provides novel pyrrolysine-based aminoacyl-tRNA synthetases, cells and compositions comprising pyrrolysine-based aminoacyl-tRNA synthetases. The present invention also provides methods of using these pyrrolysine-based aminoacyl-tRNA synthetases.

Abstract: This invention relates, in part, to newly identified polynucleotides, polypeptides, variants and derivatives thereof; processes for making the polynucleotides and the polypeptides, and their variants and derivatives; and uses of the polynucleotides, polypeptides, variants and derivatives. The invention also relates to compositions of orthogonal aminoacyl-tRNA synthetases, and pairs of orthogonal aminoacyl-tRNA synthetases, and orthogonal tRNAs that incorporate fluorinated amino acids into proteins in response to selector codons. The present invention also includes translation biochemistry methods for site-specific incorporation of fluorinated amino acids, for example, 18F- or 19F-labelled amino acids, into proteins or peptides. Such amino acids may be used as an NMR probe for characterizing protein structure, dynamics, and reactivity or for radionuclide imaging (e.g., PET). Fluorinated amino acids may also be used to stabilize proteins or peptides.

Abstract: The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.

Abstract: The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.

Abstract: This invention provides compositions and methods for generating components of protein biosynthetic machinery including orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, and orthogonal pairs of tRNAs/synthetases. Methods for identifying orthogonal pairs are also provided. These components can be used to incorporate unnatural amino acids into proteins in vivo.

Abstract: This invention provides compositions and methods for generating components of protein biosynthetic machinery including orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, and orthogonal pairs of tRNAs/synthetases. Methods for identifying orthogonal pairs are also provided. These components can be used to incorporate unnatural amino acids into proteins in vivo.

Abstract: The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.

Abstract: This invention provides compositions and methods for generating components of protein biosynthetic machinery including orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, and orthogonal pairs of tRNAs/synthetases. Methods for identifying orthogonal pairs are also provided. These components can be used to incorporate unnatural amino acids into proteins in vivo.