69 results about "Nucleic acid binding protein" patented technology

The invention provides methods for stabilizing a nucleic acid sequencing reaction. Generally, methods of the invention include exposing a target nucleic acid to a single-stranded nucleic acid binding protein and performing a sequencing reaction.

Compositions and methods for electrochemical detection and localization of genetic point mutations and other base-stacking perturbations within oligonucleotide duplexes adsorbed onto electrodes and their use in biosensing technologies are described. An intercalative, redox-active moiety (such as an intercalator or nucleic acid-binding protein) is adhered and / or crosslinked to immobilized DNA duplexes at different separations from an electrode and probed electrochemically in the presence or absence of a non-intercalative, redox-active moiety. Interruptions in DNA-mediated electron-transfer caused by base-stacking perturbations, such as mutations or binding of a protein to its recognition site are reflected in a difference in electrical current, charge and / or potential.

Methods and compositions for performing nucleic acid duplication and amplification reactions are provided. A single-stranded nucleic acid binding protein is selected and provided in the reaction mixture which is assembled at a low, nonstringent temperature to include all of the necessary reagents for successful nucleic acid duplication or amplification reactions. By incorporating a single-stranded nucleic acid binding protein into the reaction mixture at low temperature, the generation of nonspecific products such as amplification products is improved despite the reaction mixture having been fully assembled at a nonstringent temperature.

This invention relates to a method for producing a zinc finger nucleic acid binding protein comprising preparing a zinc finger protein according design rules, varying the protein at one or more positions, and selecting variants which bind to a target nucleic acid sequence by polysome display.

The invention relates to constructs comprising a nucleic acid binding protein and a surface. At least one native accessible cysteine residue is removed from the binding protein. The binding protein is attached to the surface via one or more accessible cysteine residues. The removal of other accessible cysteine residues from the protein allows control attachment to the surface. The constructs can be used to generate transmembrane pores having a nucleic acid binding protein attached thereto. Such pores are particularly useful for sequencing nucleic acids. The enzyme handles the nucleic acid in such a way that the pore can detect each of its component nucleotides by stochastic sensing.

The present invention provides processes for measuring DNA or RNA binding proteins, specific nucleic acids, as well as enzyme activities using labeled nucleic acids of labeled protein / peptide molecules.

The invention relates to methods, products and systems for analyzing nucleic acid molecules using a nucleic acid binding protein such as a sequence-specific endonuclease. The methods can be used to obtain sequence information about the nucleic acid molecules.

The invention relates to the use of nucleic acid binding agents for labeling polymers such as nucleic acid molecules. The nucleic acid binding agents are nucleic acid binding proteins that bind nucleic acid molecules non-specifically, in some embodiments.

The invention provides methods of attaching proteins to lipidic microparticles with efficiencies of at least 77%. The proteins are attached to linker molecules comprising a hydrophilic domain and a hydrophobic domain. The proteins can be antibodies, antibody fragments, hormones, growth factors, enzymes, or nucleic acid binding proteins, or other proteins. The proteins can be chemically conjugated to the linker molecules, or they can be fused to the linker molecules by recombinant techniques.

Compounds, compositions and methods are provided for modulating the expression of STAT2. The compositions comprise oligonucleotides, targeted to nucleic acid encoding STAT2. Methods of using these compounds for modulation of STAT2 expression and for diagnosis and treatment of diseases and conditions associated with expression of STAT2 are provided.

Compositions and methods for electrochemical detection and localization of genetic point mutations and other base-stacking perturbations within oligonucleotide duplexes adsorbed onto electrodes and their use in biosensing technologies are described. An intercalative, redox-active moiety (such as an intercalator or nucleic acid-binding protein) is adhered and / or crosslinked to immobilized DNA duplexes at different separations from an electrode and probed electrochemically in the presence or absence of a non-intercalative, redox-active moiety. Interruptions in DNA-mediated electron-transfer caused by base-stacking perturbations, such as mutations or binding of a protein to its recognition site are reflected in a difference in electrical current, charge and / or potential.

The invention provides methods for stabilizing a nucleic acid sequencing reaction. Generally, methods of the invention include exposing a target nucleic acid to a single-stranded nucleic acid binding protein and performing a sequencing reaction.

Methods and devices are provided for detecting the presence or absence of nucleic acid binding proteins, such as NMP22, and other proteins, in bodily fluids.

A process for high-flux screening, capturing and separation of target moleculae from complex substance (Chinese medicine or chemical mixer) includes preparing a ds DNA microarray chip to make its probe have a binding sites of dsDNA bindin, measuring the affinity of the sites, creating the standard affinity parameter system, mixing the microarray chip with said complex substance, reacting, detecting the affinity variation, screening the varied targets, linking them to the surface of chromatographic column, filling the complex substance in it, capturing the effective moleculae by probes, eluting and collecting the effective moleculae.

The invention provides methods for stabilizing a nucleic acid sequencing reaction. Generally, methods of the invention include exposing a target nucleic acid to a single-stranded nucleic acid binding protein and performing a sequencing reaction.

The invention discloses a method of detecting whether an interaction exists between nucleic acid protein and target protein based on biochip. The method comprises the following steps: (1)adding a plurality of groups of nucleic acid acquisition probes into a biological sample system containing the target protein to form a target-protein-nucleic-acid-conjugated-protein-nucleic-acid-acquisition-probe compound, and the nucleic acid acquisition probes containing at least one section of sequence capable of integrating with the nucleic acid conjugated protein; (2) separating the target-protein-nucleic-acid-conjugated-protein-nucleic-acid-acquisition-probe compound through molecules capable of specifically integrating with the target protein, and then recovering the nucleic acid acquisition probes; (3) carrying out hybridization of the nucleic acid acquisition probes recovered in the step 2 and a plurality of single chain immobilized probes which are fixed on the substrate of the biochip and are corresponding to the nucleic acid acquisition probes, and the nucleic acid sequence of the immobilized probes complementing the corresponding nucleic acid acquisition probes or one chain of the nucleic acid acquisition probes; (4) detecting the hybridization results to see whether the interaction exists between the nucleic acid conjugated protein and the target protein.

Biosensors and methods to determine the activity of any and all nucleic acid binding factors, proteins, cellular events, nucleic acid binding protein coregulators, or fragments thereof, based upon the stabilization of the interaction of two nucleic acid components, which together comprise a complete nucleic acid binding element, by the binding of a nucleic acid binding factor are provided. Preferably, a fluorescence donor is attached to a nucleic acid comprising one portion or component of a complete nucleic acid binding element and a fluorescence acceptor is attached to a nucleic acid comprising the other portion or component of the same complete binding element. Alternatively, a solid substrate is attached to a nucleic acid comprising one portion of a binding element and a detectable label is attached to a nucleic acid comprising the other portion of the same binding element. Binding of a nucleic acid binding factor to the nucleic acid components affects a change in luminescence or the association of the detectable label with the solid substrate. These biosensors and methods may also be used to detect mediating nucleic acid binding factor coregulators, post-translational modifications and cellular events, to diagnose diseases and / or screen for drugs or other ligands that mediate the activity of nucleic acid binding factors.

Compositions and methods for electrochemical detection and localization of genetic point mutations and other base-stacking perturbations within oligonucleotide duplexes adsorbed onto electrodes and their use in biosensing technologies are described. An intercalative, redox-active moiety (such as an intercalator or nucleic acid-binding protein) is adhered and / or crosslinked to immobilized DNA duplexes at different separations from an electrode and probed electrochemically in the presence or absence of a non-intercalative, redox-active moiety. Interruptions in DNA-mediated electron-transfer caused by base-stacking perturbations, such as mutations or binding of a protein to its recognition site are reflected in a difference in electrical current, charge and / or potential.

The invention provides a method for producing a zinc finger polypeptide which binds to a target nucleic acid sequence containing a modified base but not to an identical sequence containing an equivalent unmodified base.

The invention relates to a method for the transfer of molecular substances, for example proteins or nucleic acids in cells, in the case of using DNA combined with a possible gene expression. A prokaryotic nucleic acid-binding protein is used for the transfer, which is preferably obtained from a thermostable organism. Where the substance to be transferred is a nucleic acid, the protein forms a reversible complex with the nucleic acid. The prokaryotic protein condenses and compacts the nucleic acids. Said nucleic acids can be taken up in the target cells after suitable incubation.

A testing method of nucleic acid binding protein based on biochip, comprises the following steps: 1. puts a plurality of groups solution including nucleic acid captured probes into biological sample including a plurality of nucleic acid binding protein to be test, and thus forming nucleic acid captured probe-nucleic acid binding protein complexes; such nucleic acid captured probe includes at least a segment of binding sequence which can bind with aimed nucleic acid binding protein; 2. separates such nucleic acid captured probe-nucleic acid binding protein complexes, then recoveries nucleic acid captured probes; 3. hybridizes the nucleic acid captured probes according to step 2 with a plurality of single strand blotting probes on biochip substrate; the sequence of such blotting probe compensates with such nucleic acid captured probe or one of its strand; 4. detects the result of hybridization.

We describe a method of producing a modified nucleic acid binding polypeptide, the method comprising the steps of: (a) providing a nucleic acid binding polypeptide comprising a plurality of nucleic acid binding modules; (b) selecting a first binding domain consisting of one or two contiguous nucleic acid binding modules; (c) selecting a second binding domain consisting of one or two contiguous nucleic acid binding modules; and (d) introducing a flexible linker sequence to link the first and second binding domains, the flexible linker sequence comprising five or more amino acid residues. Use of structured linkers, alone or in combination with flexible linkers, is also disclosed.

Compositions and methods for electrochemical detection and localization of genetic point mutations, common DNA lesions and other base-stacking perturbations within oligonucleotide duplexes adsorbed onto electrodes and their use in biosensing technologies are described. An intercalative, redox-active moiety (such as an intercalator or nucleic acid-binding protein) is adhered and / or crosslinked to immobilized DNA duplexes at different separations from an electrode and probed electrochemically in the presence or absence of a non-intercalative, redox-active moiety. Interruptions in DNA-mediated electron-transfer caused by base-stacking perturbations, such as mutations or binding of a protein to its recognition site are reflected in a difference in electrical current, charge and / or potential.

The invention relates to a method for the transfer of molecular substances, for example proteins or nucleic acids in cells, in the case of using DNA combined with a possible gene expression. A prokaryotic nucleic acid-binding protein is used for the transfer, which is preferably obtained from a thermostable organism. Where the substance to be transferred is a nucleic acid, the protein forms a reversible complex with the nucleic acid. The prokaryotic protein condenses and compacts the nucleic acids. Said nucleic acids can be taken up in the target cells after suitable incubation.

The invention discloses a sequence-specific nuclear acid binding protein based nucleic acid detecting and ribotyping method and application thereof. The method is characterized in that nucleic acid tobe detected is mixed with microspheres of which the surfaces are provided with sequence-specific nuclear acid binding protein, sequence-specific nuclear acid binding protein and microspheres, and then incubation is performed under room temperature; the microspheres are observed through a microscope tool, to realize the nucleic acid detecting and ribotyping. With the adoption of the method, even fm-level DNA can be quickly and simply without the complex, time-consumption and high-cost processes such as nucleic acid amplification and nucleic acid hybridization in traditional nucleic acid detection. According to the method, the properties of sequence-specific nuclear acid binding protein on specific recognizing and binding of nucleic acid molecules are utilized, so that the key bottleneck problems such as nucleic acid hybridization and amplification in the current fields of nucleic acid detecting and ribotyping are successfully avoided; the visual, digital and super-sensitive quick detection of nucleic acid is realized; and the method is extremely high in value of wide application in the field of nucleic acid detection.

The present invention provides gene editing compositions or kits for in vivo gene therapy. A gene editing composition or kit provided in the invention comprises 1) an sgRNA linked to a nucleic acid molecule of a binding protein targeting a mutant gene or a coding sequence thereof, 2) a template nucleic acid or code sequence thereof for repairing a mutant gene of inter, 3) a nuclease guided by sgRNA or coding sequence thereof, and 4) a protein fused with a nucleic acid bin protein capable of promoting homologous recombination or coding sequence thereof, wherein that nucleic acid binding proteinis capable of binding to the nucleic acid molecule in the above 1). The invention also relates to the use of sgRNA, compositions or kits for the treatment of diseases caused by gene mutations, such as hereditary diseases. The sgRNA, composition or kit of the invention can effectively improve the efficiency of homologous recombination repair, and can also realize homologous recombination repair innon-dividing cells.

Methods and compositions for performing nucleic acid duplication and amplification reactions are provided. A single-stranded nucleic acid binding protein is selected and provided in the reaction mixture which is assembled at a low, nonstringent temperature to include all of the necessary reagents for successful nucleic acid duplication or amplification reactions. By incorporating a single-stranded nucleic acid binding protein into the reaction mixture at low temperature, the generation of nonspecific products such as amplification products is improved despite the reaction mixture having been fully assembled at a nonstringent temperature.