Assays for measuring nucleic acid binding proteins and enzyme activities
First Claim
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1. A method for assaying a sample for the presence of a nucleic acid binding protein, which comprises:
- a) mixing at least one predetermined single- or double-stranded nucleic acid containing at least one label and containing a protein binding nucleotide sequence with a sample which may contain a nucleic acid binding protein, b) incubating the mixture of step a) under conditions which allow the binding of said nucleic acid binding protein to said at least one predetermined single- or double-stranded nucleic acid to form a complex, c) adding a nucleic acid-cleaving enzyme or reagent to the mixture of step b), d) incubating the mixture of step c) under conditions which allow the cleavage of said at least one predetermined single- or double-stranded nucleic acid which has not formed a complex, and e) measuring the amount of said complex by means that do not include gel electrophoretic separation to measure said nucleic acid binding protein.
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Abstract
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.
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Citations
23 Claims
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1. A method for assaying a sample for the presence of a nucleic acid binding protein, which comprises:
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a) mixing at least one predetermined single- or double-stranded nucleic acid containing at least one label and containing a protein binding nucleotide sequence with a sample which may contain a nucleic acid binding protein, b) incubating the mixture of step a) under conditions which allow the binding of said nucleic acid binding protein to said at least one predetermined single- or double-stranded nucleic acid to form a complex, c) adding a nucleic acid-cleaving enzyme or reagent to the mixture of step b), d) incubating the mixture of step c) under conditions which allow the cleavage of said at least one predetermined single- or double-stranded nucleic acid which has not formed a complex, and e) measuring the amount of said complex by means that do not include gel electrophoretic separation to measure said nucleic acid binding protein. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11)
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3. A method for assaying a sample for the presence of an inhibitor of a predetermined nucleic acid binding protein, which comprises:
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a) mixing at least one predetermined single- or double-stranded nucleic acid containing at least one label and containing a protein binding nucleotide sequence and a predetermined nucleic acid binding protein with a sample which may contain an inhibitor of the binding of said predetermined nucleic acid binding protein with said at least one predetermined single- or double-stranded nucleic acid, b) incubating the mixture of step a) under conditions which allow the binding of said nucleic acid binding protein to said at least one predetermined single- or double-stranded nucleic acid to form a complex, c) adding a nucleic acid-cleaving enzyme or reagent to the mixture of step b), consisting of peptide nucleic acid linkages, phosphorothioate linkages, and methyl phosphonate linkages.
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12. A kit comprising in one or more containers:
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a) a nucleic acid having a predetermined protein binding region wherein said nucleic acid has a detectable moiety attached thereto, and wherein said nucleic acid has a plurality of nucleic acid linkages, wherein said linkages prevent cleavage of the nucleic acid by a nuclease when a protein is bound to said protein binding region, b) a nucleic acid-cleaving enzyme or nucleic acid-cleaving reagent, and c) a solid phase. - View Dependent Claims (13, 14, 15, 16)
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- 17. A nucleic acid comprising a predetermined protein binding region wherein said nucleic acid has a detectable moiety attached thereto and wherein said nucleic acid has a plurality of nucleic acid linkages, wherein said linkages prevent cleavage of the nucleic acid by a nuclease when a protein is bound to said protein binding region.
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21. A method for assaying a sample for the presence of a nucleic acid binding protein, which comprises:
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a) mixing at least one predetermined single- or double-stranded nucleic acid containing modified nucleotides that are resistant to nuclease cleavage, at least one label, and containing a protein binding nucleotide sequence with a sample which may contain a nucleic acid binding protein, b) incubating the mixture of step a) under conditions which allow the binding of said nucleic acid binding protein to said at least one predetermined single- or double-stranded nucleic acid to form a complex, c) adding a nucleic acid-cleaving enzyme or reagent to the mixture of step b), d) incubating the mixture of step c) under conditions which allow the cleavage of said at least one predetermined single- or double-stranded nucleic acid which has not formed a complex, and e) measuring the amount of said complex by means that do not include gel electrophoretic separation to measure said nucleic acid binding protein. - View Dependent Claims (22, 23)
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Specification