摘要:
The present invention provides methods for amplifying a nucleic acid from a sample containing a mixture of nucleic acids utilizing a solid support. Methods are provided utilizing user-defined primer oligonucleotides for directional amplification that assists in further manipulation of the target nucleic acid, such as sequencing. Methods are also provided utilizing blocker and displacer oligonucleotides for generating amplified target nucleic acids of defined length. One of these methods provides a first oligonucleotide and a second oligonucleotide affixed to a solid support or separate solid supports. The first oligonucleotide is blocked to prevent extension from the 3′-terminus and has a sequence complementary to a first portion of a target nucleic acid. The second oligonucleotide has a sequence that is identical to a second portion of the target nucleic acid. In this method, a sample is applied to the solid support and the target nucleic acid within the sample binds said first oligonucleotide. The solid support is then washed to remove unbound nucleic acids. A primer sequence containing a target binding region and a polymerase promoter sequence is then annealed to the bound target nucleic acid and extended producing a first duplex nucleic acid. The target sequence is then removed leaving a first nucleic acid that can now bind the second oligonucleotide. The second oligonucleotide is extended to produce a second duplex nucleic acid that contains a second nucleic acid. The second nucleic acid is then amplified by adding a polymerase.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a circularized template. Circularization may be achieved utilizing a bridging oligonucleotide or an inverter primer. The bridging oligonucleotide or inverted primer is extended forming a concatemeric amplicon that can then be used as a template to provide exponential amplification of the target nucleic acid.
摘要:
The present invention provides methods of amplifying a fragmented target nucleic acid containing short target nucleic acid fragments utilizing an assembler sequence to convert these short fragments into longer sequences enabling their identification and interrogation. This is particularly important when attempting to identify small genetic variations, such as SNVs, present in highly fragmented nucleic acid samples. Amplification is accomplished by hybridizing the short target nucleic acid sequences to the assembler sequence, where these short sequences serve as primers for extension. Since the fragmented target nucleic acids that contain SNVs are utilized as primers on the assembler sequence they are preserved during amplification and can be detected.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a circularized template. Circularization may be achieved utilizing a bridging oligonucleotide or an inverter primer. The bridging oligonucleotide or inverted primer is extended forming a concatemeric amplicon that can then be used as a template to provide exponential amplification of the target nucleic acid.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a circularized template. Circularization may be achieved utilizing a bridging oligonucleotide or an inverter primer. The bridging oligonucleotide or inverted primer is extended forming a concatemeric amplicon that can then be used as a template to provide exponential amplification of the target nucleic acid.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a clamp oligonucleotide comprising a first target-binding region on the 3′-terminus and a second target-binding region on the 5′-terminus and tether region in between. The tether region may comprise a variety of user-defined sequences or elements that allow for further manipulation of the target nucleic acid. Such as, for example, capture followed by amplification, identification and/or sequencing. The target-binding regions bind to the target nucleic acid, the 3′-terminus functions as a primer to initiate extension across the target nucleic acid sequence and ligation of the gap results in formation of a circularized nucleic acid. This circular template can be used in a variety of processes, including amplification and sequencing.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a circularized template. Circularization may be achieved utilizing a bridging oligonucleotide or an inverter primer. The bridging oligonucleotide or inverted primer is extended forming a concatemeric amplicon that can then be used as a template to provide exponential amplification of the target nucleic acid.
摘要:
The present invention provides methods for amplifying a nucleic acid from a sample containing a mixture of nucleic acids utilizing a solid support. Methods are provided utilizing user-defined primer oligonucleotides for directional amplification that assists in further manipulation of the target nucleic acid, such as sequencing. Methods are also provided utilizing blocker and displacer oligonucleotides for generating amplified target nucleic acids of defined length. One of these methods provides a first oligonucleotide and a second oligonucleotide affixed to a solid support or separate solid supports. The first oligonucleotide is blocked to prevent extension from the 3′-terminus and has a sequence complementary to a first portion of a target nucleic acid. The second oligonucleotide has a sequence that is identical to a second portion of the target nucleic acid. In this method, a sample is applied to the solid support and the target nucleic acid within the sample binds said first oligonucleotide. The solid support is then washed to remove unbound nucleic acids. A primer sequence containing a target binding region and a polymerase promoter sequence is then annealed to the bound target nucleic acid and extended producing a first duplex nucleic acid. The target sequence is then removed leaving a first nucleic acid that can now bind the second oligonucleotide. The second oligonucleotide is extended to produce a second duplex nucleic acid that contains a second nucleic acid. The second nucleic acid is then amplified by adding a polymerase.
摘要:
The present invention provides methods of amplifying a target nucleic acid utilizing a circularized template. Circularization may be achieved utilizing a bridging oligonucleotide or an inverter primer. The bridging oligonucleotide or inverted primer is extended forming a concatemeric amplicon that can then be used as a template to provide exponential amplification of the target nucleic acid.
摘要:
The present invention provides methods of amplifying a fragmented target nucleic acid containing short target nucleic acid fragments utilizing an assembler sequence to convert these short fragments into longer sequences enabling their identification and interrogation. This is particularly important when attempting to identify small genetic variations, such as SNVs, present in highly fragmented nucleic acid samples. Amplification is accomplished by hybridizing the short target nucleic acid sequences to the assembler sequence, where these short sequences serve as primers for extension. Since the fragmented target nucleic acids that contain SNVs are utilized as primers on the assembler sequence they are preserved during amplification and can be detected.