Detection of base pair mismatches using RNAase A
First Claim
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1. A method to detect at least one single base pair mismatch between a single stranded DNA or RNA sample and a single stranded RNA probe wherein said method comprises:
- annealing together said single stranded DNA or RNA sample and said single stranded RNA probe to form a sample duplex,providing a control duplex comprising said single stranded RNA probe and a polynucleotide strand, wherein said duplex is free from mismatches,mixing said sample duplex and said control duplex with RNAase A,separating by size the products of said RNAase A treatment,and comparing the number and sizes of the products from said sample duplex with the products from identically treated said control duplex, as an indication of the presence or absence of a mismatch in said sample duplex.
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Abstract
A method for detecting and localizing single base substitutions in RNA or DNA that involves RNAase A cleavage of single base mismatches in RNA:RNA or RNA:DNA heteroduplexes. A RNA probe complementary to wild type DNA is annealed to the test DNA containing a single base substitution. Many of the possible single base mismatches can be cleaved by RNAase A. The location of the single base substitution can be determined by analyzing the sizes of the RNA cleavage products.
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14 Claims
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1. A method to detect at least one single base pair mismatch between a single stranded DNA or RNA sample and a single stranded RNA probe wherein said method comprises:
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annealing together said single stranded DNA or RNA sample and said single stranded RNA probe to form a sample duplex, providing a control duplex comprising said single stranded RNA probe and a polynucleotide strand, wherein said duplex is free from mismatches, mixing said sample duplex and said control duplex with RNAase A, separating by size the products of said RNAase A treatment, and comparing the number and sizes of the products from said sample duplex with the products from identically treated said control duplex, as an indication of the presence or absence of a mismatch in said sample duplex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification