Non-mass determined base compositions for nucleic acid detection
First Claim
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1. A method of classifying a bioagent template nucleic acid according to a subgenus or species, said method comprising:
- (a) amplifying a bioagent template nucleic acid in a sample using a primer pair to generate an amplicon,wherein said primer pair hybridizes to said bioagent template nucleic acid and said amplicon at regions conserved among a genus of bioagents, andwherein said conserved regions flank a variable region that differs between at least two or more species of said genus of bioagents;
(b) determining a partial base count of at least a subsequence of said variable region using a method that does not measure molecular mass of said template nucleic acid by mass spectrometry, to produce partial base count data, wherein said partial base count data provides the number but not the linear order of only one, two, or three nucleobase types, and wherein said subsequence of said variable region is at least 17 nucleobases in length; and
(c) querying a database in silico with said partial base count data,wherein said database comprises a collection of partial base composition entries that are each indexed to both;
i) a particular subgenus or species, and ii) said primer pair used to generate said amplicon,wherein each of said partial base count entries provides the number but not the linear order of only one, two or three nucleobase types, andwherein said querying is performed by a computer processor coupled to a controller configured to query said database for a match of said partial base count data with at least one of said partial base count entries, thereby classifying said bioagent template nucleic acid according to said subgenus or said species.
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Abstract
The present invention provides systems, methods, and compositions for nucleic acid detection based on non-mass determined base compositions. For example, in certain embodiments, base count data for a template nucleic acid is generated using an approach that does not measure molecular mass of the template nucleic acid (e.g., by sequencing the template nucleic acid) and a database comprising base count entries is queried to identify the target nucleic acid. In particular embodiments, sequencing is employed which is conducted in substantially real-time.
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29 Claims
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1. A method of classifying a bioagent template nucleic acid according to a subgenus or species, said method comprising:
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(a) amplifying a bioagent template nucleic acid in a sample using a primer pair to generate an amplicon, wherein said primer pair hybridizes to said bioagent template nucleic acid and said amplicon at regions conserved among a genus of bioagents, and wherein said conserved regions flank a variable region that differs between at least two or more species of said genus of bioagents; (b) determining a partial base count of at least a subsequence of said variable region using a method that does not measure molecular mass of said template nucleic acid by mass spectrometry, to produce partial base count data, wherein said partial base count data provides the number but not the linear order of only one, two, or three nucleobase types, and wherein said subsequence of said variable region is at least 17 nucleobases in length; and (c) querying a database in silico with said partial base count data, wherein said database comprises a collection of partial base composition entries that are each indexed to both;
i) a particular subgenus or species, and ii) said primer pair used to generate said amplicon,wherein each of said partial base count entries provides the number but not the linear order of only one, two or three nucleobase types, and wherein said querying is performed by a computer processor coupled to a controller configured to query said database for a match of said partial base count data with at least one of said partial base count entries, thereby classifying said bioagent template nucleic acid according to said subgenus or said species. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 26, 27, 28, 29)
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23. A method of classifying a bioagent target nucleic acid in a sample according to a subspecies comprising:
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(a) amplifying a bioagent template nucleic acid in a sample using a primer pair to generate an amplicon, wherein said primer pair hybridizes to said bioagent template nucleic acid and said amplicon at regions conserved among a species of bioagents, and wherein said conserved regions flank a variable region that differs between at least two or more subspecies of said species of bioagents; (b) determining a partial base count of at least a subsequence of said variable region using a method that does not employ mass spectrometry to produce partial base count data, wherein said partial base count data provides the number, but not the linear order of, only one, two, or three nucleobase types, and wherein said subsequence of said variable region is at least 17 nucleobases in length; and (c) querying a database in silico with said partial base count data, wherein said database comprises a collection of partial base composition entries that are each indexed to both;
i) a particular subspecies and ii) said primer pair used to generate said amplicon,wherein each of said partial base count entries provides the number but not the linear order of only one, two or three nucleobase types, and wherein said querying is performed by a computer processor coupled to a controller configured to query said database for a match of said partial base count data with at least one of said partial base count entries, thereby classifying said bioagent target nucleic acid according to said subspecies. - View Dependent Claims (24, 25)
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Specification