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David R. Liu, Lexington US

David R. Liu, Lexington, MA US

Patent application numberDescriptionPublished
20080227152In vivo incorporation of unnatural amino acids - The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.09-18-2008
20080261311In vivo incorporation of unnatural amino acids - The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.10-23-2008
20080318807Iterated Branching Reaction Pathways Via Nucleic Acid-Mediated Chemistry - The present invention provides methods and compositions for performing multi-step nucleic acid mediated synthesis of a highly diverse collection of molecules, for example, small molecules and polymers. In the method, in at least two steps, multiple reaction intermediates and/or products are produced in the same step by different chemical reactions.12-25-2008
20090035824NUCLEIC ACID-TEMPLATED CHEMISTRY IN ORGANIC SOLVENTS - The present invention provides methods and compositions for performing nucleic acid mediated chemistry in a variety of organic solvents. A variety of nucleic acid mediated chemical reactions may be efficiently carried out in organic solvents.02-05-2009
20090053791Methods and composition for the production of orthogonal tRNA-aminoacyl tRNA synthetase pairs - 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.02-26-2009
20090068717In vivo incorporation of unnatural amino acids - The invention provides methods and compositions for in vivo incorporation of unnatural amino acids. Also provided are compositions including proteins with unnatural amino acids.03-12-2009
20090203530Polymer evolution via templated synthesis - The invention provides a method for producing polymers having a desirable property, for example, catalytic activity or binding activity, via evolutionary nucleic acid-mediated chemistry.08-13-2009
20090263851IN VIVO SELECTION SYSTEM FOR ENZYME ACTIVITY - The present invention provides in vivo systems in which activity of a biological cleavage enzyme, such as a site-specific recombinase, a homing endonuclease, or an intein, is linked to cell viability and therefore can be selected. The invention further provides methods of making cells in which the activity of a biological cleavage enzyme is linked to viability, as well as methods of identifying new biological cleavage enzymes, including enzymes having altered site specificity, using such cells.10-22-2009
20100048422Methods of Producing Modified Assembly Lines and Related Compositions - The present invention provides a method producing a modified assembly line, such as those that produce non-ribosomal peptides and polyketides. The modified assembly lines of the invention can be used to produce novel compounds with therapeutic activities. The invention also provides organisms containing modified assembly lines and libraries of modified assembly lines.02-25-2010
20100209994Protein Surface Remodeling - Aggregation is a major cause of the misbehavior of proteins. A system for modifying a protein to create a more stable variant is provided. The method involves identifying non-conserved hydrophobic amino acid residues on the surface of a protein, suitable for mutating to more hydrophilic residues (e.g., charged amino acids). Any number of residues on the surface may be changed to create a variant that is more soluble, resistant to aggregation, has a greater ability to re-fold, and/or is more stable under a variety of conditions. The invention also provides GFP, streptavidin, and GST variants with an increased theoretical net charge created by the inventive technology. Kits are also provided for carrying out such modifications on any protein of interest.08-19-2010
20110027867Methods and compositions for the production of orthogonal tRNA-aminoacyltRNA synthetase pairs - 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 viva02-03-2011
20110112040SUPERCHARGED PROTEINS FOR CELL PENETRATION - Compositions, systems and related methods for delivering a supercharged protein or a complex of a supercharged protein and therapeutic agent (e g, nucleic acid, peptide, small molecule) to cells are disclosed. Superpositively charged proteins may be associated with nucleic acids (which typically have a net negative charge) via electrostatic interactions. The systems and methods may involve altering the primary sequence of a protein in order to “supercharge” the protein (e g, to generate a superpositively-charged protein). The compositions may be used to treat proliferative diseases, infectious diseases, cardiovascular diseases, inborn errors in metabolism, genetic diseases, etc.05-12-2011

Patent applications by David R. Liu, Lexington, MA US