Method for one step isothermal non-transcription based amplification of nucleic acids
First Claim
1. A process for the exponential amplification of a nucleic acid in a reaction mix by means of at least one enzyme, wherein the reaction mix comprises a nucleic acid to be amplified and oligonucleotides having base sequences substantially complementary to base sequences of the nucleic acid to be amplified, which oligonucleotides may, under appropriate conditions, form starting points and/or chemical oligonucleotide building blocks for nucleic acid synthesis, said process comprising the steps offorming a reaction product comprising said oligonucleotides which is substantially complementary to the nucleic acid to be amplified,reacting the reaction product with oligonucleotides such that additional reaction product is formed and the nucleic acid to be amplified is amplified,whereby the steps are performed at a temperature which destabilizes the double strand form of the reaction product, and whereby said temperature is held essentially isothermal throughout amplification.
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Abstract
The present invention relates to a process for the transcriptionless amplification of nucleic acids or nucleic acid sequences by means of enzymes in which the nucleic acids or sequences are divided at least partially into their individual strands before amplification and/or transcribed and the reaction mixture contains oligonucleotides with a base sequence essentially complementary to those of the ends of the nucleic acids or sequences to be amplified, where said oligonucleotides can, in certain conditions, form starting points and/or chemical components for the synthesis of nucleic acids and are built into the amplification product to be formed. The product of the components itself again corresponds to the nucleic acid or sequence to be amplified. The reaction product formed from the oligonucleotide components, possibly from the templates and other chemical components, reacts again in one step with the oligonucleotide components, the reaction being conducted substantially isothermally.
148 Citations
17 Claims
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1. A process for the exponential amplification of a nucleic acid in a reaction mix by means of at least one enzyme, wherein the reaction mix comprises a nucleic acid to be amplified and oligonucleotides having base sequences substantially complementary to base sequences of the nucleic acid to be amplified, which oligonucleotides may, under appropriate conditions, form starting points and/or chemical oligonucleotide building blocks for nucleic acid synthesis, said process comprising the steps of
forming a reaction product comprising said oligonucleotides which is substantially complementary to the nucleic acid to be amplified, reacting the reaction product with oligonucleotides such that additional reaction product is formed and the nucleic acid to be amplified is amplified, whereby the steps are performed at a temperature which destabilizes the double strand form of the reaction product, and whereby said temperature is held essentially isothermal throughout amplification.
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17. A process for the exponential amplification of a nucleic acid in a reaction mix by means of enzymes, wherein the reaction mix comprises a nucleic acid to be amplified and oligonucleotides having base sequences substantially complementary to base sequences of the nucleic acid to be amplified, which oligonucleotides may, under appropriate conditions, form starting points and/or chemical oligonucleotide building blocks for nucleic acid synthesis, said process comprising the steps of
forming a reaction product comprising said oligonucleotides which is substantially complementary to the nucleic acid to be amplified, reacting the reaction product with oligonucleotides such that additional reaction product is formed and the nucleic acid to be amplified is amplified, whereby the steps are performed at a temperature which is above the melting temperature of the oligonucleotides used, whereby said temperature destabilizes the double strand form of the reaction product, and whereby said temperature is held essentially isothermal throughout amplification.
Specification