Post-termination labeling of nucleic acid fragments and uses thereof
First Claim
1. A process for non-linearly amplifying a specific target nucleic acid sequence comprising the steps of:
- (1) providing;
said specific target nucleic acid sequence;
a primer or a singular nucleic acid construct for non-linear amplification, comprising three segments;
(a) a first segment being sufficiently complementary to a first portion of said specific target nucleic acid sequence to (i) bind or hybridize thereto and (ii) provide for template-dependent extension of said first portion such that a first primer extension is produced;
(b) a second segment sufficiently identical to a second portion of said specific target nucleic acid sequence to provide sequences that bind to sequences produced by extension of said first segment of (a); and
(c) a third segment sufficiently identical to said first segment of (a) that use of said third segment as a template directs synthesis of a complementary sequence that can then be further extended by either (i) using itself as template in an intramolecular extension or (ii) using an unextended primer as a template in an intermolecular extension, and(d) substrates, buffer and a template-dependent polymerizing enzyme; and
(2) incubating said specific target nucleic acid sequence and said primer or nucleic acid construct in the presence of said substrates, buffer and template-dependent polymerizing enzyme to obtain said non-linearly amplified target sequence, provided that at least one primer extension is carried out under limited cycling conditions, limited substrate conditions, limited extension duration or a combination of any of the foregoing.
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Accused Products
Abstract
This invention provides novel processes for amplifying nucleic acid sequences of interest, including linear and non-linear amplification. In linear amplification, a single initial primer or nucleic acid construct is utilized to carry out the amplification process. In non-linear amplification, a first initial primer or nucleic acid construct is employed with a subsequent initial primer or nucleic acid construct. In other non-linear amplification processes provided by this invention, a first initial primer or nucleic acid construct is deployed with a second initial primer or nucleic acid construct to amplify the specific nucleic acid sequence of interest and its complement that are provided. A singular primer or a singular nucleic acid construct capable of non-linear amplification can also be used to carry out non-linear amplification in accordance with this invention. Post-termination labeling process for nucleic acid sequencing is also disclosed in this invention that is based upon the detection of tagged molecules that are covalently bound to chemically reactive groups provided for chain terminators. A process for producing nucleic acid sequences having decreased thermodynamic stability to complementary sequences is also provided and achieved by this invention. Unique nucleic acid polymers are also disclosed and provided in addition to other novel compositions, kits and the like.
50 Citations
23 Claims
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1. A process for non-linearly amplifying a specific target nucleic acid sequence comprising the steps of:
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(1) providing; said specific target nucleic acid sequence; a primer or a singular nucleic acid construct for non-linear amplification, comprising three segments; (a) a first segment being sufficiently complementary to a first portion of said specific target nucleic acid sequence to (i) bind or hybridize thereto and (ii) provide for template-dependent extension of said first portion such that a first primer extension is produced; (b) a second segment sufficiently identical to a second portion of said specific target nucleic acid sequence to provide sequences that bind to sequences produced by extension of said first segment of (a); and (c) a third segment sufficiently identical to said first segment of (a) that use of said third segment as a template directs synthesis of a complementary sequence that can then be further extended by either (i) using itself as template in an intramolecular extension or (ii) using an unextended primer as a template in an intermolecular extension, and (d) substrates, buffer and a template-dependent polymerizing enzyme; and (2) incubating said specific target nucleic acid sequence and said primer or nucleic acid construct in the presence of said substrates, buffer and template-dependent polymerizing enzyme to obtain said non-linearly amplified target sequence, provided that at least one primer extension is carried out under limited cycling conditions, limited substrate conditions, limited extension duration or a combination of any of the foregoing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification