Methods for simultaneous amplification of target loci
First Claim
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1. A method of amplifying target loci of DNA molecules in a nucleic acid sample, the method comprising:
- (a) contacting the sample and a library of at least 1,000 non-immobilized, non-identical primers that hybridize to at least 1,000 non-identical target loci to produce a reaction mixture in which the concentration of each primer is less than 20 nM;
wherein the average length of the DNA molecules is less than 200 base pairs; and
wherein a range of melting temperatures of the at least 1000 non-identical primers is less than 10°
C.;
(b) subjecting the reaction mixture to PCR conditions to produce amplified products comprising target amplicons;
wherein a length of an annealing step of the PCR conditions is greater than 10 minutes;
wherein the length of the target amplicons is less than 100 nucleotides;
wherein at least 1,000 different target human loci are amplified, and wherein at least 50% of the amplified products comprise target loci.
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Abstract
The invention provides methods for simultaneously amplifying multiple nucleic acid regions of interest in one reaction volume as well as methods for selecting a library of primers for use in such amplification methods. The invention also provides library of primers with desirable characteristics, such as minimal formation of amplified primer dimers or other non-target amplicons.
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Citations
19 Claims
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1. A method of amplifying target loci of DNA molecules in a nucleic acid sample, the method comprising:
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(a) contacting the sample and a library of at least 1,000 non-immobilized, non-identical primers that hybridize to at least 1,000 non-identical target loci to produce a reaction mixture in which the concentration of each primer is less than 20 nM;
wherein the average length of the DNA molecules is less than 200 base pairs; and
wherein a range of melting temperatures of the at least 1000 non-identical primers is less than 10°
C.;(b) subjecting the reaction mixture to PCR conditions to produce amplified products comprising target amplicons;
wherein a length of an annealing step of the PCR conditions is greater than 10 minutes;
wherein the length of the target amplicons is less than 100 nucleotides;
wherein at least 1,000 different target human loci are amplified, and wherein at least 50% of the amplified products comprise target loci. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18)
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10. A method of amplifying target loci of DNA molecules in a nucleic acid sample, the method comprising:
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(a) contacting the sample and a library of at least 1,000 non-immobilized, non-identical primers that hybridize to at least 1,000 non-identical target loci to produce a reaction mixture in which the concentration of each primer is less than 20 nM;
wherein the average length of the DNA molecules is less than 200 base pairs;(b) subjecting the reaction mixture to PCR conditions to produce amplified products comprising target amplicons;
wherein a length of an annealing step of the PCR conditions is greater than 10 minutes;
wherein the length of the target amplicons is less than 100 nucleotides;
wherein at least 1,000 different target human loci are amplified, wherein at least 50% of the amplified products comprise target loci; and
wherein the sample comprises or is derived from maternal blood. - View Dependent Claims (11)
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19. A method of amplifying target loci of DNA molecules in a nucleic acid sample, the method comprising:
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(a) contacting the sample and a library of at least 1,000 non-immobilized, non-identical primers that hybridize to at least 1,000 non-identical target loci to produce a reaction mixture in which the concentration of each primer is less than 20 nM;
wherein the average length of the DNA molecules is less than 200 base pairs;(b) subjecting the reaction mixture to PCR conditions to produce amplified products comprising target amplicons;
wherein a length of an annealing step of the PCR conditions is greater than 10 minutes;
wherein the length of the target amplicons is less than 100 nucleotides;
wherein at least 1,000 different target human loci are amplified, wherein at least 50% of the amplified products comprise target loci; and
wherein the target human loci comprise single nucleotidepolymorphisms.
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Specification