Abstract: Compositions for gene modification related to base editor systems, and methods of using the same to treat or prevent conditions associated with the extracellular deposition in various tissues of amyloid fibrils formed by the aggregation of misfolded transthyretin (TTR) proteins. Such conditions include, but are not limited to, polyneuropathy due to hereditary transthyretin amyloidosis (hATTR-PN) and hereditary cardiomyopathy due to transthyretin amyloidosis (hATTR-CM), both associated with autosomal dominant mutations of the TTR gene, and an age-related cardiomyopathy associated with wild-type TTR proteins (ATTRwt), also known as senile cardiac amyloidosis.

Abstract: The invention of the disclosure features compositions and methods for treating hereditary angioedema by introducing one or more alterations to a kallikrein B1 (KLKB1) polynucleotide in a cell. In particular embodiments, the invention provides a base editor system (e.g., a fusion protein or complex comprising a programmable DNA binding protein, a nucleobase editor, and gRNA) for modifying a KLKB1 polynucleotide, where the modification is associated with reduced expression and/or reduced activity of the KLKB1 polypeptide encoded by the polynucleotide.

Abstract: 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.

Abstract: 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.

Abstract: The invention provides compositions comprising novel adenosine base editors (e.g., ABE8) that have increased efficiency and methods of using base editors comprising adenosine deaminase variants for altering mutations associated with Glycogen Storage Disease Type 1a (GSD1a).

Abstract: 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.

Abstract: 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.