Methods and products (e.g., guide RNAs or pegRNA and recombinant proteins) are described for decreasing amyloidogenic Aβ peptide levels produced by a cell, or the aggregation of the Aβ peptide, as well as uses of such methods and products, for example for the treatment of Alzheimer's disease and/or age-related cognitive decline in a subject in need thereof.

The present invention belongs to the field of plant genetic engineering. Specifically, the invention relates to a method for creating novel herbicide resistant plants by base editing techniques and a method for screening endogenous gene mutation sites capable of conferring herbicide resistance in plants. The invention also relates to the use of the identified endogenous gene mutantation sites in crop breeding.

The present application relates to: a single base substitution protein; a composition comprising same; and a use thereof.

Materials and methods for using modified Cas9-APOBEC fusion polypeptides for targeted modification of specific DNA sequences are provided herein.

Provided herein are compositions and methods of using base editors comprising a polynucleotide programmable nucleotide binding domain and a nucleobase editing domain in conjunction with a guide polynucleotide. Also provided herein are base editor systems for editing nucleobases of target nucleotide sequences.

The present application provides systems, methods and compositions used for targeted gene modification, targeted insertion, perturbation of gene transcripts, and nucleic acid editing. Novel nucleic acid targeting systems comprise components of Type VII Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) systems and transposable elements.

The present invention relates to a fusion protein for enhancing gene editing and use thereof. In particular, the invention provides an enhanced fusion protein. The enhanced fusion proteins of the present invention can significantly increase gene editing efficiency in vivo or in vitro as compared to the wildtype gene editing protein.

Disclosed herein are CRISPR/Cas-based base editing compositions and methods for treating Duchenne Muscular Dystrophy by restoring dystrophin function. In an aspect, the disclosure relates to a CRISPR/Cas-based base editing system for altering a RNA splice site encoded in the genomic DMA of a subject. In some embodiments, altering the RNA splice site encoded in the genomic DNA results in exclusion or inclusion of at least one exon sequence in an RNA transcript.

The disclosure provides compositions comprising novel adenosine base editors (e.g., ABE8) that have increased efficiency and methods of using these adenosine deaminase variants for editing a target sequence.

The present disclosure provides compositions and methods for performance of targeted mutagenesis in higher eukaryotic cells, e.g., mammalian cells, across large stretches of targeted sequence. Compositions and methods that rely upon combination of a bacteriophage polymerase with a nucleic acid-editing deaminase to achieve robust mutagenesis of targeted regions of nucleic acid sequence under control of a phage promoter are specifically provided.