46 results about "Homing endonuclease" patented technology

Compositions and methods for modifying genetic material are provided. One embodiment provides aptamers capable of binding to a site-specific DNA binding moiety to facilitate the exchange of homologous genetic information between a donor molecule and the desired target locus (aptamer-guided gene targeting or AGT). One embodiment provides an oligonucleotide containing a aptamer, preferably a DNA aptamer at the 5′ end. The oligonucleotide also contains a region of homology, also referred to as donor DNA, to a desired nucleic acid, locus, or gene. The DNA binding moiety can be a nucleic acid, a protein, or a complex of proteins. In a preferred embodiment the DNA binding moiety is a homing endonuclease that cuts DNA to facilitate the modification of the DNA by the donor DNA.

A group of modular cloning vector plasmids for the synthesis of a transgene or other complicated DNA construct, by providing a backbone having docking points therein, for the purpose of gene expression or analysis of gene expression. The invention is useful for assembling a variety of DNA fragments into a de novo DNA construct or transgene by using cloning vectors optimized to reduce the amount of manipulation frequently needed. The module vector contains at least one multiple cloning site (MCS) and multiple sets of rare restriction and / or unique homing endonuclease (“HE”) sites, arranged in a linear pattern. This arrangement defines a modular architecture that allows the user to place domain modules or inserts into a PE3 transgene vector construct without disturbing the integrity of DNA elements already incorporated into the PE3 vector in previous cloning steps. The PE3 transgenes produced using the invention may be used in a single organism, or in a variety of organisms including bacteria, yeast, mice, and other eukaryotes with little or no further modification.

Disclosed herein are compositions for inactivating the human CCR5 gene comprising engineered LAGLIDADG homing endonucleases (LHEs) and their derivatives, particularly derived from members of the \-Onul subfamily of LHE. Polynucleotides encoding such endonucleases, vectors comprising said polynucleotides, cells comprising or having been treated with such endonucleases, and therapeutic compositions deriving therefrom are also provided.

Disclosed herein are compositions for inactivating the human TCR-alpha gene comprising engineered LAGLIDADG homing endonucleases (LHEs) and their derivatives, particularly derived from members of the \-Onul subfamily of LHEs. Polynucleotides encoding such endonucleases, vectors comprising said polynucleotides, cells comprising or having been treated with such endonucleases, and therapeutic compositions deriving therefore are also provided.

Provided are compositions and methods for the treatment of hemoglobinopathies such as thalassemias and sickle cell disease. Compositions and methods include one or more endonuclease(s) or endonuclease fusion protein(s), including one or more homing endonuclease(s) and / or homing endonuclease fusion protein(s) and / or CRISPR endonuclease(s) and / or CRISPR endonuclease fusion protein(s): (a) to disrupt a Bcl11a coding region; (b) to disrupt a Bcl11a gene regulatory region; (c) to modify an adult human β-globin locus; (d) to disrupt a HbF silencing DNA regulatory element or pathway, such as a Bcl11a-regulated HbF silencing region; (e) to mutate one or more γ-globin gene promoter(s) to achieve increased expression of a γ-globin gene; (f) to mutate one or more δ-globin gene promoter(s) to achieve increased expression of a δ-globin gene; and / or (g) to correct one or more β-globin gene mutation(s).

According to particular exemplary aspects, DNA target site binding and cleavage properties of native, variant or modified homing endonucleases (HE) (e.g., LAGLIDAG (LHE), HNH, His-Cys Box, GIY-YIG, I-SspI-type, and fusions, muteins or variants thereof) in solution are recapitulated on the cell surface (e.g., as assessed by flow cytometric analysis) to provide for novel cells expressing one or more cell surface HEs (e.g., expressing one or more HE binding and / or cleavage specificities), novel cell libraries, and high-throughput methods for assessing target site binding, target site cleavage. The rapid analysis of HE and LHE-DNA interactions on the cell surface with concurrent sorting options provides for high-throughput library screening affording rapid identification, analysis and isolation of novel HEs or LHEs having novel sequence specificities. Such novel sequence specificities, obtained by said methods provide novel methods for introducing targeted DNA-strand cleavage events, and novel chromatin immunoprecipitation methods (CHIP methods).

The present disclosure provides improved genome editing compositions and methods for editing a PD-1 gene. The disclosure further provides genome edited cells for the prevention, treatment, or amelioration of at least one symptom of, a cancer, an infectious disease, an autoimmune disease, an inflammatory disease, or an immunodeficiency.