Abstract: The present disclosure provide viral compositions and methods for modulating adeno-associated virus properties including transduction efficiency, virus capsid assembly, viral genome packaging, capsid stability and intracellular processing. Engineered adeno-associated viruses with modifications in the N-terminal region of the capsid proteins VP1 or VP2 are provided which have varying effects on viral properties including transduction efficiency. Corresponding nucleic acids and amino acids are provided.

Abstract: This invention describes light-controlled delivery to the nucleus of target cells via viral vectors modified using optogenetic tools. This invention also describes tools for the display of proteins on the surface of adeno-associated virus using enzymatic tools to display the proteins in a more favorable thermodynamic configuration to enhance activity of the proteins or their targets.

Abstract: Provided herein are recombinant viral nanoparticles (VNPs) which comprise truncated viral proteins. The VNPs may be mosaic VNPs which are activatable at desired levels. The VNPs may be used to administer therapeutic agents to target cells.

Abstract: The present disclosure provide viral compositions and methods for modulating adeno-associated virus properties including transduction efficiency, virus capsid assembly, viral genome packaging, capsid stability and intracellular processing. Engineered adeno-associated viruses with modifications in the N-terminal region of the capsid proteins VP1 or VP2 are provided which have varying effects on viral properties including transduction efficiency. Corresponding nucleic acids and amino acids are provided.

Abstract: The present invention is a peptide lock that comprises at least one peptide that is genetically encoded into the Adeno-associated virus (AAV) capsid that block biologically active domains on the virus capsid surface. The peptide lock, can be processed by biological enzymes to restore biological behavior of the capsid-displayed domains, thus ‘decoding the lock’ or opening the lock. A method of forming the peptide lock comprises providing at least one peptide, providing an Adeno-associated virus capsid and genetically inserting the at least one peptide into the Adeno-associated virus capsid to block the biologically active domains on the virus capsid surface.

Abstract: The present invention is a peptide lock that comprises at least one peptide that is genetically encoded into the Adeno-associated virus (AAV) capsid that block biologically active domains on the virus capsid surface. The peptide lock, can be processed by biological enzymes to restore biological behavior of the capsid-displayed domains, thus ‘decoding the lock’ or opening the lock. A method of forming the peptide lock comprises providing at least one peptide, providing an Adeno-associated virus capsid and genetically inserting the at least one peptide into the Adeno-associated virus capsid to block the biologically active domains on the virus capsid surface.