WO2012037876A1 - Dna标签及其应用 - Google Patents
Dna标签及其应用 Download PDFInfo
- Publication number
- WO2012037876A1 WO2012037876A1 PCT/CN2011/079898 CN2011079898W WO2012037876A1 WO 2012037876 A1 WO2012037876 A1 WO 2012037876A1 CN 2011079898 W CN2011079898 W CN 2011079898W WO 2012037876 A1 WO2012037876 A1 WO 2012037876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dna
- tag
- index
- dna tag
- strand
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6869—Methods for sequencing
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
- C12N15/1034—Isolating an individual clone by screening libraries
- C12N15/1065—Preparation or screening of tagged libraries, e.g. tagged microorganisms by STM-mutagenesis, tagged polynucleotides, gene tags
Definitions
- the invention relates to the field of nucleic acid sequencing technology, in particular to the field of DNA sequencing technology.
- the invention relates to DNA tags for DNA sequencing and their use. More specifically, the present invention provides a DNA tag, an oligonucleotide, a DNA tag library, a preparation method thereof, a method for determining DNA sample sequence information, a method for determining DNA sequence information of a plurality of samples, and a method for constructing a DNA tag library.
- a kit for constructing a DNA tag library Background technique
- DNA sequencing technology is one of the important molecular biological analysis methods. It not only provides important data for basic biological research such as gene expression and gene regulation, but also plays an important role in applied research such as disease diagnosis and gene therapy. .
- Solexa DNA Sequencing Platform Illumina
- SBS Sequencing By Synthesis
- Illumina has introduced a DNA tag (also known as index) database building method based on the Solexa DNA sequencing platform. As shown in Fig. 1, in the DNA tag construction process, three PCR primers were used, and a DNA tag library was constructed by PCR. (Preparing samples for multiplexed paired-End sequencing; Illumina part#1005361 Rev.B, by reference Incorporate it in its entirety).
- the inventors of the present application found that the above-described method for preparing a tag library has some drawbacks: First, Illumina currently only provides 12 tag sequences of 6 bp in length, and the number of tags is small, and as the Solexa sequencing throughput increases, It is impossible to mix and sequence a large number of samples, which will waste the sequencing resources and affect the sequencing flux. Second, the above label construction method is to introduce the tag sequence into the library of the target fragment by PCR reaction, and the PCR amplification of the target fragment The amplification process requires the use of three PCR primers (two common PCR primers and one PCR tag primer, as shown in Figure 1), time-consuming consumables, and inefficient PCR amplification.
- the linker used in the above label construction method does not include the tag sequence ⁇ ij. Therefore, when a plurality of sample DNAs are sequenced, the tag libraries of each sample need to be independently constructed, that is, each is separately introduced by a PCR reaction. The tag sequence is then separately labeled for each tag library, and then the respective tag libraries obtained by the gel extraction are mixed, and finally the mixture of the plurality of sample tag libraries can be sequenced, which is time consuming and laborious, and high in cost.
- a DNA tag (herein, simply referred to as a "tag”) that can be used to construct a library of DNA tags is presented.
- the invention proposes a set of isolated DNA tags.
- the sample source of the DNA can be accurately characterized by linking the DNA tag to the sample DNA or its equivalent.
- a DNA tag library of a plurality of samples (herein, sometimes referred to as a "tag library”) can be simultaneously constructed, so that a DNA tag library derived from different samples can be mixed and then sequenced.
- the library is sequenced to increase the sequencing efficiency and throughput of the DNA tag library.
- the inventors have surprisingly found that the construction of a DNA tag library using a DNA tag according to an embodiment of the present invention enables precise discrimination of a plurality of DNA tag libraries, and the resulting sequencing data results are very stable and reproducible.
- the present invention also provides a set of isolated oligonucleotides for introducing the above DNA tag into sample DNA or its equivalent.
- a set of isolated oligonucleotides according to an embodiment of the invention having a first strand and a second strand, and wherein the first strand consists of a nucleotide represented by SEQ ID NO: (3N-1),
- these oligonucleotides (also referred to in the present specification, sometimes referred to as "DNA tag linkers” or “tag linkers”) have the DNA tags of the embodiments of the present invention as described above, And it has a sticky end T, and thus, the corresponding DNA tag can be introduced into the DNA or its equivalent by a ligation reaction.
- the corresponding DNA tag linker can be formed by annealing the sense sequence DNA Index_NF_adapter and its corresponding antisense sequence DNA Index - NR_adapter.
- DNA tag sequence (DNA Index - N ) and its corresponding DNA tag linker sequence
- the above-described oligonucleotide according to an embodiment of the present invention (which may also be referred to as a DNA tag linker), it is possible to efficiently introduce a DNA tag into the DNA of the sample or its equivalent, thereby enabling construction of DNA having a DNA tag.
- Tag library the inventors have surprisingly found that when constructing a DNA tag library containing various DNA tags with oligonucleotides having different tags for the same sample, the stability and reproducibility of the resulting sequencing data results are very it is good.
- the human whole blood sample DNA tag library constructed using Indexl-67 exhibits a correlation of at least 0.99 when data analysis is performed using the pearson coefficient.
- the invention provides a method of constructing a DNA tag library. According to an embodiment of the present invention, comprising: randomly breaking a DNA sample to obtain a random fragment; performing end repair on the random fragment to obtain a distally repaired random fragment; in the end-repaired random fragment 3.
- a DNA tag linker comprises one selected from the group of isolated DNA tags according to the above embodiments of the present invention; the ligation product to which the DNA tag linker is ligated is amplified to obtain an amplification product; and the amplification product is isolated and recovered
- the amplification product constitutes the DNA tag library.
- the DNA tag library to be sequenced to obtain sequence information of the sample DNA and information on the DNA tag, thereby enabling differentiation of the source of the sample DNA.
- the inventors have surprisingly found that when the same sample is used, based on the above method, when a DNA tag library containing various DNA tags is constructed using oligonucleotides having different tags, the stability of the obtained sequencing data results is Repeatability is very good.
- the present invention also provides a DNA tag library obtained by the method of constructing a DNA tag library according to an embodiment of the present invention.
- the present invention also provides a method of determining DNA sample sequence information.
- a method of determining DNA sample sequence information comprising: constructing a DNA tag library of the DNA sample according to a method of constructing a DNA tag library according to an embodiment of the present invention; and sequencing the DNA tag library to determine a sequence of the DNA sample information.
- the sequence information of the DNA sample in the DNA tag library and the sequence information of the DNA tag can be efficiently obtained, thereby enabling differentiation of the source of the DNA sample.
- the inventors have surprisingly found that the use of the method according to an embodiment of the present invention to determine DNA sample sequence information can effectively reduce the problem of data production bias and can accurately distinguish a plurality of DNA tag libraries.
- the present invention also provides a method of determining DNA sequence information of a plurality of samples.
- the method comprises the steps of: establishing, for each of the plurality of samples, a DNA tag library of the DNA sample independently of the method of constructing a DNA tag library according to an embodiment of the present invention, wherein , different DNA samples are multiplexed with DNA tags of different and known sequences, wherein the plurality of samples are 2-67; the DNA tag libraries of the plurality of samples are combined to obtain a DNA tag library mixture; using Solexa a sequencing technique for sequencing the DNA tag library mixture to obtain sequence information of the DNA sample and sequence information of the tag; and classifying sequence information of the DNA sample based on sequence information of the tag, so as to The DNA sequence information of the plurality of samples is determined.
- the method according to an embodiment of the present invention can make full use of high-throughput sequencing technology, for example, using Solexa sequencing technology, and simultaneously sequencing DNA tag libraries of various samples, thereby improving the efficiency and sequencing of DNA tag library sequencing.
- the amount, at the same time, can improve the efficiency of determining the DNA sequence information of a plurality of samples.
- a kit for constructing a DNA tag library comprising: 67 isolated oligonucleotides, said isolated oligonucleotide, according to an embodiment of the present invention
- the nucleotide has a first strand and a second strand, wherein the first strand is composed of a nucleotide represented by SEQ ID NO: (3N-1), respectively, and the second strand is respectively represented by SEQ ID NO: (3N)
- SEQ ID NO: (3N) SEQ ID NO:
- FIG. 1 is a schematic flow chart showing a method for constructing a DNA tag library provided by Illumina
- FIG. 2 is a flow chart showing a method for constructing a DNA tag library according to an embodiment of the present invention
- FIG. 3 is a view showing an embodiment of the present invention. Electrophoresis results of the constructed 67 DNA tag libraries
- Figure 4 shows the results of a DNA tag library constructed according to an embodiment of the present invention using Agilent 2100.
- first and second are used for descriptive purposes only, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first”, “second” may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, “multiple” means two or more unless otherwise stated.
- the present invention proposes a number of isolated DNA tags.
- SEQ ID NO: (3N-2) any integer of 1-67.
- DNA as used in the present invention may be any polymer comprising deoxyribonucleotides including, but not limited to, modified or unmodified DNA.
- a DNA tag according to an embodiment of the present invention, a DNA tag library having a tag is obtained by linking the DNA tag to the DNA of the sample or its equivalent, and the sequence of the sample DNA and the sequence of the tag can be obtained by sequencing the DNA tag library. Further, based on the sequence of the tag, the sample source of the DNA can be accurately characterized.
- a DNA tag library of a plurality of samples can be simultaneously constructed, and the DNA sequence of the sample can be classified based on the DNA tag by mixing and simultaneously sequencing the DNA tag library derived from different samples.
- DNA tag attached to the DNA of the sample or its equivalent shall be understood broadly, and it may include a DNA tag directly linked to the DNA of the sample to construct a DNA tag library, and may also have DNA with the sample.
- a nucleic acid of the same sequence (for example, may be the corresponding RNA sequence or cDNA sequence, which has the same sequence as the DNA).
- the inventors of the present application found that: In the present invention, in order to design an effective DNA tag, it is first necessary to consider the problem of recognizability and recognition rate between tag sequences. Second, in the case of a label mix of less than 12 samples, the GT content of each base site on the mixed label must be considered. Because the excitation fluorescence of the bases G and T is the same in the Solexa sequencing process, the excitation lights of the bases A and C are the same, so the "balance" of the base “GT” content and the base “AC” content must be considered. The base base "GT” content is 50%, which guarantees the highest label recognition rate and the lowest error rate. Finally, consider the repeatability and accuracy of the data output.
- the inventors of the present application performed a large number of screening work, and selected a set of isolated DNA tags according to an embodiment of the present invention, namely the nucleotide sequences shown by SEQ ID NO: (3N-2), respectively. .
- the sequence is as shown in Table 1 above and will not be described again.
- These tags can be applied to the construction of any DNA tag library. There are currently no rumors for library construction of these tags for DNA sample sequencing and sequencing by Solexa.
- the DNA tag used is a nucleic acid sequence of 6 bp in length, and the difference between the tags is more than 3 bases, the set of DNA tags consisting of: At least 5, or at least 10, or at least 15, or at least 20, at least 25, or at least 30, or at least, of the 67 DNA tags shown in Table 1 or a DNA tag differing by 1 base therefrom 35, or at least 40, or 45, or at least 50, or at least 55, or at least 60, or all 67.
- the set of DNA tags preferably includes at least DNA Index - 1 ⁇ DNA Index - 5 or DNA Index _ 6 ⁇ DNA in 67 DNA tags shown in Table 1.
- the one base difference comprises a substitution, addition or deletion of one base in the sequence of the 67 tags shown in Table 1.
- the present invention also provides the use of a tag according to an embodiment of the present invention for DNA tag library construction and sequencing.
- the DNA tag is contained in the 3, terminal end of the DNA tag linker, thereby constituting the corresponding DNA tag linker, which is simultaneously used as the 5, linker and 3, linker of the DNA tag library.
- the DNA tag is inserted into the 3, end of the DNA tag linker, or is ligated with or without a linker at the 3, end of the DNA linker, preferably without the linker at the 3, end of the DNA linker. .
- the invention provides a set of isolated oligonucleotides which can be used to introduce a DNA tag as described above into the DNA of a sample, thereby constructing a library of DNA tags.
- the invention provides a set of isolated oligonucleotides, each of the set of isolated oligonucleotides having a sticky end T, and the isolated oligonucleotides have a A chain and a second strand, the sticky end T is formed on the first strand of each of the oligonucleotides.
- the first strand is composed of a nucleotide represented by SEQ ID NO: (3N-1), and the second strand is a nucleoside represented by SEQ ID NO: (3N), respectively.
- the N values of the first strand and the second strand are the same, that is, when the corresponding nucleotides in the sequence listing are used as the first strand and the second strand, respectively, the core of the first strand is formed.
- the corresponding oligonucleotides can be formed by annealing the first strand and the second strand constituting the corresponding oligonucleotide, respectively.
- the above oligonucleotides respectively have the DNA tags according to the embodiments of the present invention as described above, and the oligonucleotides have sticky ends, and thus, the corresponding DNA tags can be linked by a ligation reaction. Introduced into the DNA of the sample or its equivalent. Specific The sequence of these oligonucleotides is shown in Table 1 above, and will not be described herein.
- the oligonucleotide sequence (DNA tag linker) provided according to an embodiment of the present invention has high stability. This finding was primarily based on the analysis of the structural stability of these oligonucleotide sequences by Lasergene software (http://www.dnastar.com/) in accordance with some embodiments of the present invention. Using Lasergene's PrimerSelect software, the affinity parameter between the duplexes can be determined by analyzing the energy values formed between the two sequences. The greater the absolute value of the energy value (kcal/mol), the more stable the results of the duplex. The following are the results of the above structural stability and affinity analysis of the 67 DNA tag linkers shown in Table 1 above, and the results show that the structures formed by these DNA tag linkers are very stable.
- DNA Index-7 connector The most stable dimer overall: IS* bp, -36.9 kcal/mol 5, TACACTCTTTCCCTACACGACGCTCTTCCGATCTACGGAAT 3 '
- the roost stable dimer overall: 13 bp, -3 .3 kcal/mol 5 T TACACTCTTTCCCTACACGACGCTCTTCCGATCTCACTCAT 3,
- DNA Index-49 connector The most, stable diirter overall: 19 bp, - -33.7 kcal mol 5 * TACACTC T TCCC TACAC GACGCTC TTCCGATC TG TACAT 3 '
- the invention provides a DNA tag linker in which the DNA tag linker of the DNA tag library is at the 3 end A label according to an embodiment of the invention is included, and preferably used simultaneously as a 5, a linker and a 3' linker, the set of DNA tag linkers comprising or consisting of: 67 DNA tag linkers shown in Table 1 and the inclusion thereof At least 5, or at least 10, or at least 15, or at least 20, at least 25, or at least 30, or at least 35, or at least 40 of the DNA tag sequences differing by one base.
- the set of DNA tag linkers preferably comprises at least DNA Index - 1F/R_adapte ⁇ DNA Index - 5F/R_adapter, or DNA Index - in the 67 DNA tag linkers shown in Table 1.
- a difference of 1 base includes substitution, addition or deletion of 1 base in the tag sequence.
- a DNA tag adapter for the construction and sequencing of a DNA tag library which serves as both a 5, a linker and a linker of a DN A tag library.
- a DNA tag library constructed using the above DNA tag linker, wherein the DNA tag linker is simultaneously used as a 5, linker and 3, linker of a DNA tag library.
- the present invention also provides a method of constructing a DNA tag library using the above oligonucleotide (DNA tag linker).
- the method includes: First, randomly interrupting a DNA sample to obtain a random segment.
- the source of the DNA sample is not particularly limited.
- the DNA sample is a human DNA sample. More specifically, it can be a human genomic DNA sample.
- the inventors have found that a DNA tag library of a plurality of common model organisms can be efficiently constructed using the method according to an embodiment of the present invention.
- the obtained random fragment has a length of about 180 bp, whereby the efficiency of constructing a DNA tag library and subsequent sequencing can be further improved.
- the obtained random fragments are end-repaired to obtain a random fragment that has been repaired at the end.
- base A is added to the 3, end of the end-repaired random fragment to obtain a random fragment having a sticky end A.
- the end-repaired random fragment has two oligonucleotide strands, wherein base A is added at the 3' end of the two oligonucleotide strands, and two oligonucleotides Additions to the glycosidic acid chain.
- a random fragment having a sticky end A is ligated to the DNA tag linker to obtain a ligation product to which the DNA tag linker is attached.
- the DNA tag linker is one selected from the above-described isolated oligonucleotides according to the embodiments of the present invention, that is, the DNA tag linker comprises one of the above-described set of isolated DNA tags according to an embodiment of the present invention.
- a random fragment having a sticky end A is linked to a DNA tag linker by a DN A tag link at the 3' end of both oligonucleotide strands of a random fragment having a sticky end A .
- the "ligation product linked to a DNA tag linker" obtained according to the above embodiment of the present invention contains a target fragment, a DNA linker, and a tag.
- fragment of interest has a sequence corresponding to the sequence of a random fragment (DNA).
- the random fragment refers to a DNA fragment obtained by randomly breaking a DNA sample in a method of constructing a DNA tag library according to an embodiment of the present invention.
- the sequence of the target segment corresponds to the sequence of the random segment, which means that the sequence of the random segment can be directly derived from the sequence of the target segment.
- the sequence of the target segment may be identical to the sequence of the random segment, or may be Fully complementary, even increasing or decreasing a known number of known bases, as long as the sequence of DNA can be obtained by limited calculations.
- the resulting ligation product to which the DNA tag linker is ligated is amplified to obtain an amplification product, and the amplified product is separated and recovered, and the recovered amplification product constitutes the DNA tag library.
- the method of amplifying the ligation product to which the DNA tag linker is attached is not particularly limited.
- the obtained library fragment can be amplified by a PCR reaction. Those skilled in the art can determine the primers for performing the PCR reaction based on the sequence of the library fragments.
- efficient amplification can be achieved when the following PCR protocol is employed, specifically, using primers having nucleotide sequences as shown in SEQ ID NO: 202 and SEQ ID NO: 203, respectively.
- PCR reaction the amplification product obtained by the PCR reaction has a length of about 280 to 300 bp.
- the method for separating and recovering the amplified product is also not particularly limited, and those skilled in the art can select an appropriate method and apparatus for separation according to the characteristics of the amplified product, for example, by electrophoresis and recovering a specific length. The method of the target fragment is recycled.
- the present invention provides a method of constructing a DNA tag library, comprising:
- n is an integer and an integer of 1 ⁇ n ⁇ 67, preferably n is an integer and 2 ⁇ n ⁇ 67, the DNA sample is from all eukaryotic and prokaryotic DNA samples, including but not limited to human DNA sample;
- interrupting method includes, but is not limited to, an ultrasonic interrupting method, and preferably the DNA strip after the disruption is concentrated at about 180 bp;
- each tag linker is attached to both ends of the DNA fragment
- the ligation product obtained in the step 5) is subjected to gel recovery and purification, preferably by electrophoresis and recovery by 2% agarose gel, and the recovered products of the respective DNA samples are mixed together;
- PCR reaction using a mixture of the recovered products of the step 6) as a template, performing PCR amplification under conditions suitable for amplifying the nucleic acid of interest, and purifying and purifying the PCR product, preferably recovering a 280-300 bp target fragment.
- a DNA tag library constructed by the above method for constructing a DNA tag library according to an embodiment of the present invention has a DNA tag linker comprising or consisting of the following: 67 DNA tag tags shown in Table 1 Included in the DNA tag sequence are at least 5, or at least 10, or at least 15, or at least 20, at least 25, or at least 30, or at least 35, or at least 35, or 1 at least 35, or At least 40, or 45, or at least 50, or at least 55, or at least 60, or all 67.
- the DNA tag linker preferably comprises at least DNA Index - 1F/ of 67 DNA tag linkers shown in Table 1.
- a difference of 1 base comprises a substitution, addition or deletion of 1 base in the tag.
- the step 7 of the above method for constructing a DNA tag library according to an embodiment of the present invention includes: the primer used in the PCR reaction includes
- a DNA tag according to an embodiment of the present invention can be efficiently introduced into a DNA tag library constructed for a DNA sample.
- sequencing the DNA tag library the sequence information of the DNA sample and the sequence information of the DNA tag can be obtained, thereby distinguishing the source of the DNA sample.
- the inventors have surprisingly found that when the same sample is used, based on the above method, when a DNA tag library containing various DNA tags is constructed using oligonucleotides having different tags, the stability of the obtained sequencing data results is Repeatability is very good.
- the inventors of the present application surprisingly found that a tag is embedded in a DNA linker, a DNA tag library is constructed by ligating a DNA tag linker, and products linked to the DNA tag linker are mixed together, one PCR The reaction completes the construction of all tag libraries that need to be mixed. Not only can it improve the sequencing throughput of current DNA samples, but also improve the efficiency of library preparation and label recognition, which greatly reduces the cost of sequencing a single library.
- the present invention optimizes the DNA linker sequence provided by Illumina, introduces a tag sequence into the adaptor, and introduces the tag sequence into the library of interest through ligation of the DNA tag linker.
- the additional PCR primers are not needed, thereby simplifying the steps of primer synthesis, reducing the difficulty of the PCR reaction, and improving the specificity of the PCR reaction. So far, the DNA library construction method and tag sequence of the tag introduced into these tags by these DNA tag linkers have not been reported.
- the DNA tag linker of the present invention is an optimized DNA tag linker compared to the DNA linker of Illumina Corporation, and the DNA tag linker improves the efficiency of the linker connection and improves the recognition efficiency of the tag sequence. And the number of labels.
- FIG. 1 and FIG. 2 wherein a flowchart of a method for constructing a DNA tag library of Illumina company shown in FIG. 1 and a method for constructing a DNA tag library of the embodiment of the present invention shown in FIG. 2 are placed. flow chart.
- the present invention also provides a kit for constructing a DNA tag library.
- the kit comprises: 67 isolated oligonucleotides having a first strand and a second strand, the sticky ends being formed on the first strand T, and the first strand is composed of a nucleotide represented by SEQ ID NO: (3N-1), respectively, and the second strand is composed of a nucleotide represented by SEQ ID NO: (3N), wherein
- a DNA tag according to an embodiment of the present invention can be conveniently introduced into a constructed DNA tag library.
- reagents for constructing DNA markers can be included in the kit.
- the general components of the library are not described here.
- the present invention also provides a DNA tag library constructed according to the method of constructing a DNA tag library of the present invention.
- the tagged DNA tag library can be effectively applied to high-throughput sequencing technologies such as Solexa technology, so that the obtained nucleic acid sequence information such as DNA sequence information can be accurately classified by sample source by obtaining a tag sequence.
- the present invention also provides a method of determining DNA sample sequence information.
- the method comprises: constructing a DNA tag library according to a method for constructing a DNA tag library according to an embodiment of the present invention; and then, sequencing the constructed DNA tag library to determine sequence information of the DNA sample. Based on this method, the sequence information of the DNA sample in the DNA tag library and the sequence information of the DNA tag can be efficiently obtained, thereby distinguishing the source of the DNA sample. Further, the inventors have surprisingly found that the use of the method according to an embodiment of the present invention to determine DNA sample sequence information can effectively reduce the problem of data output bias, and can accurately distinguish a plurality of DNA tag libraries.
- the constructed DNA tag library can be sequenced by any known method, and the type thereof is not particularly limited. According to some examples of the invention, DNA tag libraries can be sequenced using Solexa sequencing technology. According to an embodiment of the present invention, suitable sequencing primers can be selected for sequencing according to specific conditions.
- the present invention provides a method of determining DNA sequence information for a plurality of samples.
- the method comprises the steps of: constructing a DNA tag library of the DNA sample according to a method for constructing a DNA tag library according to an embodiment of the present invention, respectively, for each of a plurality of samples, wherein Different DNA samples use DNA labels of different and known sequences, and the term "various" is used herein to be 2-67.
- the resulting DNA tag libraries of various samples were combined to obtain a DNA tag library mixture.
- the resulting DNA tag library mixture was sequenced using Solexa sequencing technology to obtain sequence information of the DNA sample and sequence information of the tag. Finally, based on the sequence information of the tag, the sequence information of the DNA sample is classified to determine the sequence information of the plurality of sample DNAs.
- the method according to an embodiment of the present invention can make full use of high-throughput sequencing technology, for example, using Solexa sequencing technology to simultaneously sequence DNA libraries of various samples, thereby improving the efficiency and throughput of DNA library sequencing. At the same time, the efficiency of determining sequence information of a plurality of sample DNAs can be improved.
- the sequencing method and the sequencing primers used in the prior art have been described in detail above and will not be mentioned here.
- the comfort thermomixer was adjusted to 20 °C for 30 min and then purified using the QIAquick PCR Purification Kit. Finally, the sample was dissolved in 32 ⁇ l of lysis buffer.
- Klenow enzyme (3' to 5' exonuclease activity) 3 microliters total volume 50 microliters
- the comfort thermostat mixer was adjusted to 37 °C for 30 min, then purified using the MiniElute PCR Purification Kit, and finally the sample was dissolved in 10 ⁇ l of Elution Buffer 0
- the DNA Index-N linker used may be a DNA tag linker formed by annealing one of the DNA Index - NF _adapter and DNA Index - NR_adapter shown in Table 1.
- the comfort thermomixer was adjusted to 20 ° C for 15 min, then purified using the QIAquick PCR Purification Kit and finally dissolved in 30 ⁇ l of Lysis Buffer.
- the ligation product was electrophoretically separated in 2% agarose gel; then the 280-300 bp fragment of interest was placed in an Eppendorf tube.
- the gel was purified by QIAquick Glue Purification Kit and the recovered product was dissolved in 30 ⁇ l of Elution Buffer.
- the reaction mixture was prepared according to the following reaction system, and the reagent was placed on water.
- the PCR product was electrophoresed in 2% agarose gel, and the 280-300 bp target fragment was cut and recovered, and purified by QIAquick gel purification kit. The recovered product was dissolved in 30 ⁇ l of elution buffer.
- Figure 3 shows the results of electrophoresis of 67 DNA tag libraries constructed according to the present example.
- D2000 and 50 bp markers were used, respectively, from Tiangen and NEB; the size of the target library fragment was marked by the arrow.
- lanes 1 to 25 are from left to right.
- (a) is the DNA tag linker library test (index l ⁇ index23) electrophoresis test results (lane 1 and lane 25 are D2000 makrer and 50bp marker ⁇ lanes 2 to 24, respectively, constructed using DNA tag linker index l ⁇ index23
- (b) is a DNA tag linker library test ( index23 ⁇ index44 )
- the results of electrophoresis assays (lanes 1 and 25 are D2000 makrer and 50 bp marker ⁇ , respectively, lanes 2 to 24 are libraries constructed using the DNA tag linker index23 ⁇ index44, respectively, wherein lane 14 is the negative control of the test, ie no sample);
- c) is the DNA taggone library test (index45 ⁇ index67).
- Fig. 4 shows the results of the DNA tag library constructed according to the present example using Agilent 2100.
- the sample name is Agilent3
- the peaks in the figure represent Marker, sample size, and Marker from left to right.
- the size of the library fragment measured was 284 bp and the concentration was 32.64 ng/ ⁇ l. The library size and concentration were all acceptable.
- the tag is fully recognized, that is, 0 mismatch (mismatch) accounted for 98.43%, the tag detected error of 1 base, that is, 1 error match accounted for 0.09%, and other reads (other reads) accounted for 1.48%. Therefore, the recognition rate of the sequencing result label is 98.5%, which can meet the sequencing requirements of the Solexa DNA index. And for the same sample, when using different labels for sequencing, the data stability and reproducibility are very good.
- the method and kit for constructing a DNA tag library can be applied to DNA sequencing and can effectively improve the sequencing throughput of a sequencing platform such as the Solexa sequencing platform.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Biotechnology (AREA)
- General Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- Bioinformatics & Computational Biology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Plant Pathology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明基于Illumina公司的Solexa测序平台提供的DNA标签文库制备方法,设计了长度为6bp独特的标签序列,将标签嵌入DNA接头中,通过连接DNA接头连接来导入标签序列,成功的建立了DNA标签文库的建库方法,并应用于SolexaDNA测序。
Description
DNA标签及其应用 优先权信息
本申请请求 2010 年 9 月 21 日向中国国家知识产权局提交的、 专利申请号为 201010299257.3的专利申请的优先权和权益, 并且通过参照将其全文并入此处。
技术领域
本发明涉及核酸测序技术领域, 特别是 DNA测序技术领域。 具体的, 本发明涉及 用于 DNA测序的 DNA标签及其应用。 更具体的, 本发明提供了用于构建 DNA标签文 库的 DNA标签、 寡核苷酸、 DNA标签文库及其制备方法、 确定 DNA样品序列信息的 方法、 确定多种样品 DNA序列信息的方法以及用于构建 DNA标签文库的试剂盒。 背景技术
DNA测序技术, 是重要的分子生物学分析方法之一, 它不仅为基因表达、 基因调 控等生物学基础研究提供重要数据, 而且也在疾病诊断学、基因治疗等应用研究中起着 重要的作用。基于 Solexa DNA测序平台( Illumina ) , 釆用边合成边测序 ( Sequencing By Synthesis, SBS ) , 具有所需样品量少, 高通量, 高精确性, 拥有简单易操作的自动化 平台和功能强大等特点 (例 口参见 Paired- End sequencing User Guide ;Illumina part#1003880 ; Preparing samples for ChIP sequencing for DNA;Illumina part#l 1257047 Rev. A ; mRNA sequencing sample preparation Guide;Illumina part#l 004898 Rev.D ; Preparing 2-5kb samples for mate pair library sequencing; Illumina part#1005363 Rev.B , 通过参照将其全文并入本文) 。
然而, 目前对样品 DNA进行测序的方法, 仍有待改进。
发明内容
本发明是基于发明人的下列发现而完成的:
目前 Illumina公司基于 Solexa DNA测序平台推出了 DNA标签(也称为 index )建 库方法。 如图 1所示, 在 DNA标签建库流程中, 使用了 3条 PCR引物, 通过 PCR导 入标签来构建 DNA标签文库 ( Preparing samples for multiplexed Paired-End sequencing; Illumina part#1005361 Rev.B , 通过参照将其全文并入本文) 。 本申请的发明人发现, 上述标签文库制备方法存在着一些缺陷: 第一、 目前 Illumina公司只提供了 12种长度 为 6bp的标签序列, 标签的数量较少, 随着 Solexa测序通量的增加, 不能对大量样本 进行混合测序, 从而将浪费测序资源和影响到测序通量; 第二、 上述标签建库方法是通 过 PCR反应将标签序列导入到目的片段文库中的, 其对目的片段的 PCR扩增过程需要 釆用 3条 PCR引物 (两条公用 PCR引物和一条 PCR标签引物, 如图 1所示) , 耗时 耗材, 且 PCR扩增效率不高。 第三、 上述标签建库方法中所釆用的接头不包含标签序 歹 ij , 因此对多种样品 DNA进行建库测序时, 各样品的标签文库需要独立构建, 即各自 分别通过 PCR反应来导入标签序列, 接着针对每一个标签文库分别切胶回收, 然后将 切胶回收所得的各个标签文库进行混合,最后才能将多种样品标签文库的混合物进行测 序, 不仅费时费力, 而且费用较高。
本发明旨在解决现有技术问题的至少之一。 为此, 本发明的一个方面, 提出了一种 能够用于构建 DNA标签文库的 DNA标签(在本文中, 有时也简单地称为 "标签" ) 。 根据本发明的一个方面, 本发明提出了一组分离的 DNA标签。 根据本发明的一些实施 例, 这些分离的 DNA标签由 SEQ ID NO: ( 3N-2 ) 所示的核苷酸构成, 其中 N=l-67 的任意整数。在本说明书中,这些 DNA标签分别被命名为 DNA Index _ N ,其中 N=l-67 的任意整数, 其序列如下表 1所示。 利用上述根据本发明实施例的 DNA标签, 通过将 DNA标签与样品 DNA或其等同物相连, 可以精确地表征 DNA的样品来源。 由此, 利 用上述 DNA标签, 可以同时构建多种样品的 DNA标签文库 (在本文中, 有时也称为 "标签文库" ), 从而可以通过将来源于不同样品的 DNA标签文库混合之后进行测序,
并且能够基于 DNA标签对 DNA标签文库的 DNA序列进行分类,从而可以获得多种样 品的 DNA序列信息,由此可以充分利用高通量的测序技术,例如利用 Solexa测序技术, 同时对多种 DNA标签文库进行测序, 从而提高 DNA标签文库的测序效率和通量。 发 明人惊奇地发现, 利用根据本发明实施例的 DNA标签构建 DNA标签文库, 能够精确 地对多种 DNA标签文库进行区分, 并且所得到的测序数据结果的稳定性和可重复性非 常好。
根据本发明的另一方面, 本发明还提供了用于将上述 DNA标签引入样品 DNA或 其等同物中的一组分离的寡核苷酸。根据本发明的实施例的一组分离的寡核苷酸, 具有 第一链和第二链, 并且所述第一链分别由 SEQ ID NO: ( 3N-1 ) 所示的核苷酸构成, 所述第二链分别由 SEQ ID NO: ( 3N ) 所示的核苷酸构成, 其中, 对于相同的寡核苷 酸, 其第一链和第二链的 N取值相同, 并且 N=l-67的整数。 根据本发明的实施例, 这 些寡核苷酸(在本说明书中, 有时也称为 "DNA标签接头" 或 "标签接头" ) 分别具 有如前所述的 #居本发明实施例的 DNA标签, 并且具有粘性末端 T, 因而, 可以通过 连接反应, 将相应的 DNA标签引入到 DNA或其等同物中。 与 DNA标签的命名方法类 似, 在本说明书中, 与 DNA标签 IndexN相对应的寡核苷酸( DNA标签接头) 被命名 为 DNA Index - N adapter, 其中 N=l-67的任意整数, 进一步, DNA Index - N adapter 的第一链 (在本文中, 有时也称为 "正义序列" ) 和第二链 (在本文中, 有时也称为 "正义序列 " )分别被命名为 DNA Index - NF_adapter和 DNA Index - NR_adapter, 其 中 N=l-67的整数, 其序列如下表 1所示 (表中所示序列方向均是 5, _ 3,方向) 。 根据 本发明的实施例, 可以通过将正义序列 DNA Index _ NF_adapter和其相应的反义序列 DNA Index - NR_adapter进行退火处理而形成相应的 DNA标签接头。
DNA标签序列 ( DNA Index - N ) 及其相应的 DNA标签接头序列
:/: O 8686/-0i>l£ 9/-8/-siAV
:/: O 8686/-0i>l£ 9/-8/-siAV
:/: O 8686/-0i>l£ 9/-8/-siAV
Index- 59F_adapter
DNA 5-Phos/GGTAGAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index- 59R_adapter ( 177 )
DNA Index-60 TCTCGT ( 178 )
DNA
Index-60F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTCTCGTT ( 179 )
DNA 5-Phos/ACGAGAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index-60R_adapter ( 180 )
DNA Index-61 TGCTTA ( 181 )
DNA
Index- 61 F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTGCTTAT ( 182 )
DNA 5-Phos TAAGCAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index- 61 R_adapter ( 183 )
DNA Index-62 TGGAGA ( 184 )
DNA
Index- 62F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGAGAT ( 185 )
DNA 5-Phos TCTCCAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index- 62R_adapter ( 186 )
DNA Index-63 TGGTCT ( 187 )
DNA
Index-63F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGTCTT ( 188 )
DNA 5-Phos/AGACCAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index-63R_adapter ( 189 )
DNA Index-64 TGTAAT ( 190 )
DNA
Index- 64F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTGTAATT ( 191 )
DNA 5-Phos/ATTACAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index- 64R_adapter ( 192 )
DNA Index-65 TTACTG ( 193 )
DNA
Index-65F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTTACTGT ( 194 )
DNA 5-Phos/CAGTAAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index-65R_adapter ( 195 )
DNA Index-66 TTATAA ( 196 )
DNA
Index-66F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTTATAAT ( 197 )
DNA 5-Phos TTATAAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index-66R_adapter ( 198 )
DNA Index-67 TTCCAC ( 199 )
DNA
Index-67F_adapter TACACTCTTTCCCTACACGACGCTCTTCCGATCTTTCCACT ( 200 )
DNA 5-Phos/GTGGAAAGATCGGAAGAGCACACGTCTGAACTCCAGTCAC
Index-67R_adapter ( 201 )
利用上述根据本发明实施例的寡核苷酸(也可以称为 DNA标签接头), 能够有效 地将 DNA标签引入到样品的 DNA或其等同物中,由此能够构建具有 DNA标签的 DNA
标签文库。 另外, 发明人惊奇地发现, 当针对相同的样品, 釆用具有不同标签的寡核苷 酸构建含有各种 DNA标签的 DNA标签文库时, 所得到的测序数据结果的稳定性和可 重复性非常好。 根据本发明的实施例, 当釆用 pearson 系数进行数据分析时, 利用 Indexl-67 所构建的人全血样本 DNA 标签文库均表现出了至少 0.99 的相关性。 关于 pearson系数具体算法的细节可以参见相关文献, 例如: t Hoen, P. A., Y. Ariyurek, et al. (2008). "Deep sequencing-based expression analysis shows major advances in robustness, resolution and inter-lab portability over five microarray platforms." Nucleic Acids Res 36(21): el41 , 通过参照将其全文并入本文。 重复性越高, 则其 pearson系数越接近 1。
根据本发明的又一方面,本发明提供了一种构建 DNA标签文库的方法。根据本发 明的实施例, 其包括: 将 DNA样品随机打断, 以便获得随机片段; 将所述随机片段进 行末端修复, 以便获得经过末端修复的随机片段;在所述经过末端修复的随机片段的 3, 末端添加碱基 A, 以便获得具有粘性末端 A的随机片段; 将所述具有粘性末端 A的随 机片段与 DNA标签接头相连, 以便获得连接有 DNA标签接头的连接产物, 其中所述 DNA标签接头包含选自上述根据本发明实施例的一组分离的 DNA标签的一种;对所述 连接有 DNA标签接头的连接产物进行扩增, 以便获得扩增产物; 以及分离回收所述扩 增产物, 所述扩增产物构成所述 DNA标签文库。 利用根据本发明实施例的构建 DNA 标签文库的方法, 能够有效地将根据本发明实施例的 DNA标签引入到针对样品 DNA 所构建的 DNA标签文库中。 从而可以通过对 DNA标签文库进行测序, 获得样品 DNA 的序列信息以及 DNA标签的信息, 从而能够对样品 DNA的来源进行区分。 另外, 发 明人惊奇地发现, 当针对相同的样品, 基于上述方法, 釆用具有不同标签的寡核苷酸构 建含有各种 DNA标签的 DNA标签文库时, 所得到的测序数据结果的稳定性和可重复 性非常好。
进一步, 本发明还提供了一种 DNA 标签文库, 其是由根据本发明实施例的构建 DNA标签文库的方法所获得的。
根据本发明的又一方面, 本发明还提供了一种确定 DNA样品序列信息的方法。 根 据本发明的实施例, 其包括: 根据本发明实施例的构建 DNA标签文库的方法构建所述 DNA样品的 DNA标签文库; 以及对所述 DNA标签文库进行测序, 以便确定所述 DNA样 品的序列信息。 基于该方法, 能够有效地获得 DNA标签文库中 DNA样品的序列信息以 及 DNA标签的序列信息, 从而能够对 DNA样品的来源进行区分。 另外, 发明人惊奇地 发现, 利用根据本发明实施例的方法确定 DNA样品序列信息, 能够有效地减少数据产 出偏向性的问题, 并且能够精确地对多种 DNA标签文库进行区分。
根据本发明的再一方面,本发明还提供了一种确定多种样品 DNA序列信息的方法。 根据本发明的实施例, 其包括以下步骤: 针对所述多种样品的每一种, 分别独立地根据 本发明实施例的构建 DNA标签文库的方法, 建立所述 DNA样品的 DNA标签文库, 其 中, 不同的 DNA样品釆用相互不同并且已知序列的 DNA标签, 其中所述多种为 2-67 种; 将所述多种样品的 DNA标签文库进行组合, 以便获得 DNA标签文库混合物; 利 用 Solexa测序技术, 对所述 DNA标签文库混合物进行测序, 以获得所述 DNA样品的 序列信息以及所述标签的序列信息; 以及基于所述标签的序列信息对所述 DNA样品的 序列信息进行分类, 以便确定所述多种样品的 DNA序列信息。 由此, 根据本发明实施 例的该方法, 可以充分利用高通量的测序技术, 例如利用 Solexa测序技术, 同时对多 种样品的 DNA标签文库进行测序, 从而提高 DNA标签文库测序的效率和通量, 同时 可以提高确定多种样品 DNA序列信息的效率。
根据本发明的再一方面, 还提供了一种用于构建 DNA标签文库的试剂盒, 根据本 发明的实施例, 该试剂盒包括: 67 种分离的寡核苷酸, 所述分离的寡核苷酸具有第一 链和第二链, 其中所述第一链分别由 SEQ ID NO: ( 3N-1 ) 所示的核苷酸构成, 所述 第二链分别由 SEQ ID NO: ( 3N ) 所示的核苷酸构成, 其中, 对于相同的寡核苷酸,
其第一链和第二链的 N取值相同, 并且 N=l-67的整数, 其中, 所述 67种分离的寡核 苷酸分别设置在不同的容器中。 由此, 利用该试剂盒, 能够方便地将根据本发明实施例 的 DNA标签引入到构建的 DNA标签文库中。
本发明的附加方面和优点将在下面的描述中部分给出, 部分将从下面的描述中变得 明显, 或通过本发明的实践了解到。
附图说明
本发明的上述和 /或附加的方面和优点从结合下面附图对实施例的描述中将变得明 显和容易理解, 其中:
图 1 : 显示了 Illumina公司提供的 DNA标签文库构建方法的流程示意图; 图 2: 显示了 #居本发明实施例的 DNA标签文库构建方法的流程示意图; 图 3: 显示了根据本发明实施例的构建的 67个 DNA标签文库的电泳结果; 以及 图 4: 显示了根据本发明实施例的构建的 DNA标签文库使用 Agilent2100检测的 结果。
发明详细描述
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其中自始至终相 同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附 图描述的实施例是示例性的, 仅用于解释本发明, 而不能理解为对本发明的限制。
需要说明的是, 术语 "第一" 、 "第二" 仅用于描述目的, 而不能理解为指示或暗 示相对重要性或者隐含指明所指示的技术特征的数量。 由此, 限定有 "第一"、 "第二" 的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地,在本发明的描述中, 除非另有说明, "多个" 的含义是两个或两个以上。
DNA标签
根据本申请的一个方面, 本发明提出了一些分离的 DNA标签。 根据本发明的实施 例, 这些分离的 DNA标签分别由 SEQ ID NO: ( 3N-2 )所示的核苷酸序列构成, 其中 N=l-67的任意整数。 在本说明书中, 这些 DNA标签分别被命名为 DNA Index _ N, 其 中 N=l-67的任意整数, 其序列如前面表 1所示, 在此不再赘述。
在本发明中所使用术语 "DNA"可以是任何包含脱氧核糖核苷酸的聚合物, 包括但 不限于经过修饰的或者未经修饰的 DNA。 利用根据本发明实施例的 DNA标签,通过将 DNA标签与样品的 DNA或其等同物相连, 得到具有标签的 DNA标签文库, 通过对 DNA标签文库进行测序, 可以获得样品 DNA的序列以及标签的序列, 进而基于标签的 序列可以精确地表征 DNA的样品来源。 由此, 利用上述 DNA标签, 可以同时构建多 种样品的 DNA标签文库, 从而可以通过将来源于不同样品的 DNA标签文库进行混合, 同时进行测序, 基于 DNA标签对样品的 DNA序列进行分类, 获得多种样品的 DNA的 序列信息。 从而可以充分利用高通量的测序技术, 例如利用 Solexa测序技术, 同时对 多种样品的 DNA进行测序, 从而提高了通过高通量测序技术的效率和通量, 降低了确 定 DNA样品序列信息的成本。 这里所使用的表述方式 "DNA标签与样品的 DNA或其 等同物相连" 应^ 广义理解, 其包括 DNA标签可以与样品的 DNA直接相连, 以构建 DNA标签文库,也可以与和样品的 DNA具有相同序列的核酸(例如可以是相应的 RNA 序列或 cDNA序列, 其与 DNA具有相同的序列) 相连。
本申请的发明人发现: 在本发明中, 为了设计有效的 DNA标签, 首先需要考虑标 签序列之间的可识别性和识别率的问题。 其次,在标签混合量少于 12个样品的情况下, 必须考虑到混合后的标签上的每个碱基位点的 GT含量。 因为 Solexa测序过程中,碱基 G和 T的激发荧光一样, 碱基 A和 C的激发光是一样的, 因此必须考虑碱基 "GT" 含 量与碱基 "AC" 含量的 "平衡" , 最适碱基 "GT" 含量为 50% , 能保证标签识别率最 高和错误率最低。 最后, 还要考虑数据产出的可重复性和准确性, 即为了实现能够有效 构建 DNA标签文库并进行测序, 所构建的一组 DNA标签需要能够保证结果可靠, 可
重复性高, 也就是针对同样的 DNA样品, 可以保证利用该组 DN A标签中的不同标签 构建的 DNA标签文库, 能够获得一致的测序结果, 因而可以确保实验结果可靠且重复 性高。 另外, 还需要同时避免标签序列出现 3或 3 个以上连续的碱基的出现, 因为 3 个或 3个以上连续的碱基会增加序列在合成过程中或测序过程中的错误率,同时也要尽 量避免 DNA标签接头自身形成发夹结构。
为此, 本申请的发明人进行了大量的筛选工作, 并且选定了根据本发明实施例的一 组分离的 DNA标签, 即分别 SEQ ID NO: ( 3N-2 )所示的核苷酸序列。 其序列如前面 表 1所示, 不再赘述。 另外, 发明人发现这些标签之间的差异至少有 3个碱基, 即至少 3个碱基序列不同,并且当标签的 6个碱基中的任意 1个碱基出现测序错误或合成错误, 都不影响到标签的最终识别。 这些标签可以应用于任何 DNA标签文库的构建。 目前尚 未有关于这些标签应用于 DNA样品测序的文库构建并通过 Solexa测序的 艮道。
根据本发明的一些实施例, 所釆用的 DNA标签为长度是 6 bp的核酸序列, 并且所 述标签之间的差异在 3个碱基以上, 所述一组 DNA标签由如下组成: 如前面表 1所示 67 个 DNA标签或与其相差 1个碱基的 DNA标签中的至少 5个, 或至少 10个, 或至少 15个, 或至少 20个, 至少 25个, 或至少 30个, 或至少 35个, 或至少 40个, 或 45个, 或至少 50 个, 或至少 55个, 或至少 60个, 或全部 67个。 具体地, 才艮据本发明的实施例, 所述一组 DNA标签优选地至少包括表 1所示的 67个 DNA标签中的 DNA Index - 1 ~ DNA Index - 5 , 或 DNA Index _ 6 ~ DNA Index - 10 , 或 DNA Index _ 11 ~ DNA Index - 15 , 或 DNA Index _ 16 ~ DNA Index - 20 , 或 DNA Index _ 21 ~ DNA Index - 25 , 或 DNA Index _ 26 ~ DNA Index - 30, 或 DNA Index _ 31 ~ DNA Index _ 35 , 或 DNA Index _ 36 ~ DNA Index - 40,或 DNA Index - 41 ~ DNA Index - 45 ,或 DNA Index _ 46 ~ DNA Index - 50,或 DNA Index _ 51 ~ DNA Index - 55 , 或 DNA Index _ 56 ~ DNA Index - 60, 或 DNA Index - 61 ~ DNA Index - 65 ,或 DNA Index _ 63 ~ DNA Index - 67 ,或者他们任何两个或多个的组合。 在本发明的一些具体示例中, 所述相差 1个碱基包括对表 1所示 67个标签的序列中 1个碱 基的取代、 添加或缺失。
根据本发明的实施例, 本发明还提供了将根据本发明实施例的标签用于 DNA标签 文库构建并测序的用途。 根据该用途的实施例, DNA标签包含在 DNA标签接头的 3,末 端中, 从而构成各自相对应的 DNA标签接头, 其同时作为 DNA标签文库的 5,接头和 3, 接头使用。 根据具体的示例, 所述 DNA标签插入 DNA标签接头中的 3,末端中, 或通过 或不通过连接子连接在 DNA接头的 3,末端, 优选地不通过连接子连接在 DNA接头的 3, 末端。
寡核苷酸以及构建 DNA标签文库
根据本发明的又一方面, 本发明提供了一组分离的寡核苷酸, 其可以用于将前面 所描述的 DNA标签引入到样品的 DNA中, 进而构建 DNA标签文库。 #居本发明的实施 例, 本发明提供了一组分离的寡核苷酸, 该组分离的寡核苷酸中的每一种均具有粘性末 端 T, 并且这些分离的寡核苷酸具有第一链和第二链, 粘性末端 T形成在每一种寡核苷 酸的第一链上。 其中, 根据本发明的实施例, 第一链分别由 SEQ ID NO: ( 3N-1 )所示 的核苷酸构成, 所述第二链分别由 SEQ ID NO: ( 3N ) 所示的核苷酸构成, 其中, 对 于相同的寡核苷酸, 其第一链和第二链的 N取值相同, 并且 N=l-67的整数。 对于相同的 寡核苷酸, 其第一链和第二链的 N取值相同, 即釆用序列表中的相应核苷酸分别作为第 一链和第二链时,构成第一链的核苷酸与构成第二链的核苷酸能够形成稳定的具有粘性 末端的二聚体, 具体地, 例如当 N=10时, 釆用 SEQ ID NO: 29作为第一链, SEQ ID NO: 30作为第二链。本领域技术人员能够理解, 可以通过分别将构成相应寡核苷酸的第一链 与第二链进行退火处理, 而形成相应的寡核苷酸。 根据本发明的实施例, 上述寡核苷酸 分别具有如前所述的根据本发明实施例的 DNA标签, 并且这些寡核苷酸具有粘性末端, 因而, 可以通过连接反应, 将相应的 DNA标签引入到样品的 DNA或其等同物中。 具体
地, 这些寡核苷酸的序列如前面表 1所示, 在此不再赘述。
发明人发现, 根据本发明的实施例所提供的寡核苷酸序列 (DNA标签接头) 具有 较高的稳定性。 该发现主要是根据本发明的一些实施例, 通过 Lasergene软件 ( http://www.dnastar.com/ ) 分析测试这些寡核苷酸序列的结构稳定性得来的。 使用 Lasergene的 PrimerSelect软件, 通过分析两条序列之间形成的能量值可以判断双链体之 间的亲和力参数, 能量值 (kcal/mol) 的绝对值越大表示双链体的结果越稳定。 以下是 分别对前面表 1所示的 67个 DNA标签接头进行上述的结构稳定性和亲和力分析的结果, 结果表明, 这些 DNA标签接头形成的结构非常稳定。
下面提供了根据本发明实施例的 DNA 标签接头的二级结果以及最稳定的二聚体 结果 ( The most stable dimer overall ) 及其能量值。
DNA Index- 1 接头
•The most stable dimer overall: 19 fop, —35.5 kcal/mol
5 ' TACACT C TCC CTACAC GACGC C TCCGATCTAAC CAAT 3,
3 ' CACTGACIC CAAGTCTGCACACGAGAAGGCTAGATTGGT 5 ' DNA Index-2 接头
The most s able dimei- overall:: 19 b f -3 .0 kcal/mol
5, TACACTCTTTCCCTACACGACGCTCTTCCGATCTA&CTTGT 3 '
3 , CACTGACCTCAAGTCTGCACACGAGAAGGCTAGATTCAAC 5 '
DNA Index-3 接头
The most st ble dimer overall: 19 bp, -33.4 kcal/mol 5 ' TAC¾C C TTCC TACAC GACGC C TCCG ATCTAAGAG T 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGATTCTCA 5 '
DNA Index-4 接头
The most stable dimer overall: 19 bp, -33.0 kcal/mol
5 ' ACACT CT TCC C AC ACGACGCT CT TCCG ATC TAATAACT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGATTATTG 5 '
DNA Index-5 接头
The most stable dimer overall : 19 bp, - 36.6 kcal/mol 5, 'TCCGATCTACACGCT 3 '
1 M Π 1 i 1 M M 1 !
3 ' CA( AGG GATGT GCG 5 '
DNA Index-6 接头
The most stable dimer overall: 19 b , -3 .6 kcal/mol 5 ' 1 CCGATC ACC TC T 3
3 ' .AGGCTAGATGGAGA 5 '
DNA Index-7 接头
The most stable dimer overall: IS* bp, -36.9 kcal/mol 5, TACACTCTTTCCCTACACGACGCTCTTCCGATCTACGGAAT 3 '
3 ' C ACTGACC TCAAGTCTGC ACACGAGAAGGC AGATGC CTT 5 *
DNA Index- 8 接头
The most st ble dimer overall: 19 bp, -35.2 kcal mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTAGAAGGT 3,
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGATC TCC 5 '
DNA Index-9 接头
The most stable dimer overall: 19 bp, —38.1 kcal mol 5 ' TAG ACT C T TTC C C TACAC CACGCT CT CCGATCTAGC CGTT 3 '
3 ' CACTGACCTCAAGTCTGCACACGACAAGGCTAGATCGGCA 5 '
DNA Index- 10 接头
The most stable dimer overall: 19 bp, -36- 9 kcal/mol 5, TACACTCTTTCCCTACAC GACGCTCTTCCGATCTAGCGAGT 3 '
3 ' CACTGACCTCAAGTC GCACACGAGAAGGC AGATCCC C 5 ' DNA Index- 11 接头
The most, stable dimer overall: 19 bp, -36.7 kcal/mol
5 ' ACACT CT TTCCC TACAC GACGCT C T TCCGATC T AGGC TGT 3 '
DNA Index- 12 接头
The most stable dimer overall: 19 bp, -36.4 kcal/mol 51 TACACTCT TCCCTACACGACGCTCT CCGATC AGTGCC 3 '
3 f CACTGACCTC\¾J GTCTGCACACGAGAAGGCTAGATCACGG 5 '
DNA Index- 13 接头
The most stable dimer overall: 19 bp, -32.9 kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTATAATCT 3,
3 » CAC GACCTCA_¾GTCTGCACACGAGAAGGCTAGATi T AG 5
DNA Index- 14 接头
The most stable dimer overall: kcal/mol 5 3 '
3 T CAC GACC CAAGTCTGC AC ACGAGAAGGC AGATACAGT
DNA Index- 15 接头
The most stable dimer overall: 19 b'p, -35.1 kcal/mol 5 ' TACACTCT TCCCTACACGACGC CTTCCGATCTATTCCTT 3 '
3 ' CAC GACC C¾GTCTGCACACGAGAAGGCTAGA AAGGA 5 '
DNA Index- 16 接头
The most stable dimer overall: 19 bp, —34.3 kcal/mol 5 ' TACAC C T TCC C ACAC GACGGT C CCGATC CAACACT 31
31 CACTGACCTCAAGTCTGCACACGAGAAGGC AGAGT GTG 5
DNA Index- 17 接头
The mo s t .s table dime r ove rail: -3 .6 kcal mol 5 ' 3 '
3, C ACTGACC TCAAC4TC GC ACAC GAGAAGGC AGAGTGTTC 5 ' DNA Index- 18 接头
T h e mo s t stable dimer o e rail: 19 bp , - 37 · 2 kc l mo 1
5 ' ACACTCT TCCCTACACGACGCTCTTCCGATCTCACGG T 3 '
3, CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAGTGCCA 5 '
DNA Index- 19 接头
The roost stable dimer overall: 13 bp, -3 .3 kcal/mol 5 T TACACTCTTTCCCTACACGACGCTCTTCCGATCTCACTCAT 3,
31 CAC GACCTCAAGTCTGCACACGACAAGGCTAGAG GAG 5 '
DNA Index-20 接头
The most stable clime r overall: 19 bp, -37.8 kcal mol 5 ' TACAC C TCC CTAC AC GACGC T C TCCCATCTCC AACGT 3 '
3 ' CACTGACCTCAAG CTGCACACGAGAAGGCTAGAGG TGC 5 '
DNA Index-21 接头
The most s ble dimer overall: 19 bp, -37.3 kcal/mol 5 ' TACAC C TC C C ACAC GACGC C CC GATC CCAGGAT 3 '
3 ' C ACTGACC TCAAGTCTGC AC ACGAGAAGGC TAG AGG CC T 5 '
DNA Index-22 接头
The most stable dimer overall: 19 bp, - 0.5 kcal/mol 5 ' TACACTCT TCCCTACACGACGCTCTTCCGATC CCGCCTT 3 '
3, CACTGACC CAAGTCTGCACACGAGAAGGCTAGAGGCGGA 5 ' DNA Index-23 接头
The most stable dimer overall: 19 bp -3 .9 kcal mol
3 f CAC GACC CAAG CTGCACACGAGAAGGCTAGAGGAA G 5
DNA Index-24 接头
The most stable dimer overall: -35.6 kcal mol
3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGC AGAGCTTAT 5 ' DNA Index-25 接头
The most stable dimer overall: 13 bp, -39.2 kcal/mol
5 ' TACACTC TTCCCTACACGACGCTC TCCGATCTCGCGTCT 3 '
3, CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAGCGCAG 5 '
DNA Index-26 接头
The most stable dimer overall: 1 bp,- -36.9 kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTCGGTAAT 3 '
3
DNA Index-27 接头
The mos , stable diiRer overall: 19 fc'p, -39.2 kcal/mol 5 » ACACTCTTTCCCTACACGACGCTCT CCGATC CGTCGGT 3 '
DNA Index-28 接头
The most stable dimer overall: 19 bp, -34.9 kcal/mol 5 ' ACACTCT TCCCTACACGACGCTC TCCGATC CTAGCTT 3 '
3 ' CACTGACC CAAGTC GCACACGAGAAGGCTAGAGATCGA 51
DNA Index-29 接头
The most stable dimer overall: ISf bp, -37.5 kcal/mol 5 ' TACACT C T CC C ACACGACGCT C CCGATC C C CGAT 3 '
3 5
DNA Index-30 接头
The most, stable dimer overall: 19 bp -34.6 kcal/mol 5 ' TACACTCTTTCCCTACACGACGC CTTCCGATCTCTGTTGT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGGTAGAGACAAC 5
DNA Index-31 接头
The roost stable diiRer overall: 33.4 kcal/mol 5T 3 '
3 5
DNA Index-32 接头
^赉 Of-xspui VNQ
X out " T · 9 £.— ' g τ : χ χ PJSAO .Χ θΐπτρ e e^ s -4 s ουι ΘΙΗ;'
3J,DD¥D ¾0 ε 丁 o /"[e。'
9
赉 Δ£-χ3Ρ¾ VNQ ε
2
^赉 9£-χ3Ρ¾ VNa
fe-xspui vNa
赉 εε-χ3ρ¾ VNa
8686.0/llOZN3/X3d 9.8.C0/ZT0Z OAV
DNA Index-41 接头
"The mo t stable dimer overall: 19 bp, -40.8 kcal mol 5 ' TACACT CT T CC C ACAC GACGCT CT CCGATC GGCGCTT 3 '
3 ' CACTGACCTCAAG C GCACAC¾GAAGGCTAGACCGCGA 5 " DNA Index-42 接头
The most stable dimer overall: 19 bp, -36. kcal/mol
DNA Index-43 接头
The most stable dimer overall: 19 bp, -37.8 kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTGGTTCGT 3 '
3 , CACTGACCTCAAGTCTGCACACGAGAAGGCTAGACCAAGC 5 '
DNA Index-44 接头
The most stable dimer overall: 19 bp, -33.3 kcal/mol 5 ' TACACTC TT CC C TACAC GACGCT CT CCGATC GTAC ATT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGACATCTA 5 '
DNA Index-45 接头
The most s able dimer overall: 19 bpf —34.8 kcal/mol 5 ' TACACTC TTTCC C TACAC GACGCT CT TCCGATC TG ATCCT 3 ' 31 CACTGACCTGAAGTCTGCACACGAGAAGGGTAGACATAGG 5 '
DNA Index-46 接头
The most stable dimer overall: I 9 bp, -34.0 kcal/mol. 51 TACACT CT TTCC CTACAC GACGCT C T TCCC4ATCTGTC TGTT 3 '
DNA Index-47 接头
The most stable dimer overall: 19 b , —39.3 kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTG GCGCT 3 '
3 ' CACTGACCTCAAGTC GCACACGAGAAGGCTAGACACGCG 5 '
DNA Index-48 接头
The most stable dime ov rall: 19 bp, -39.3 kcal/mol 5 ' TACACTCT CCCTACACGACGCTCT CCGATCTG GGCGT 3 '
3 T CACTGACC TCAAGT CTGCACAC GAGAAGGC TAGACAC CGC 5 '
DNA Index-49 接头
The most, stable diirter overall: 19 bp,- -33.7 kcal mol 5 * TACACTC T TCCC TACAC GACGCTC TTCCGATC TG TACAT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGC AGACAATG 5 '
DNA Index-50 接头
The most stable dimer overall: 19 bp, -34.3 kcal/mol 5 ' TACACT CT T CC C AC ACGACGCT CT TCCGATCTGTT GACT 3 '
3 ' CAC GACCTCAAGTCTGCACACGAGAAGGCTAGACAAC G 5 '
DNA Index-51 接头
The most stable dimer overall:: 19 b , -35.9 kcal/mol 5, TACACTCTTTCCCTACACGACGCTC TCCGATCTTAATCGT 3. '
3 ' CACTGACCTCAAGTC GCACACGAGAAGGC AGAA TAGC 5 '
DNA Index-52 接头
The most stable dimer overall: IS bp, -35.2 kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTC TCCGATCTTAGGAGT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAATCCTC 5 f
DNA Index-53 接头
The most stable dimer overal I: 19 bp , -35-2 kcal/mol 5 ' TACACT CT TTCC CT AC¾C GACGC T C T TCCGATCT i GTGCT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAATCACG 5 '
DNA Index-54 接头
The most stable dimer overall: 19 bp, -35. kcal/mol 5 ' TACACTCTTTCCCTACACGACGCTCTTCCGATCTTATGCTT 3. '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAATACGA 5 '
DNA Index-55 接头
The most stable dimer overall: 19 bp, -34.5 kcal mol 5 ' TACACT CT TC C C TACAC GACGCTC T CCGATC TCAGATT 3 '
3 ' GACTGACC CAAGTCTGCACACGAGAAGGC AGAAGTC A 5 r
DNA Index-56 接头
The most stable dimer- overall: 1 bp , -34.8 kcal/mol 5 ' ACACTCTTTCCCTACACGACGCTCT CCGATC TCAT CT 3 '
3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAAGTAAG 5,
DNA Index-57 接头
The most stable dimer overall: 19 bp, -37.6 kcal/mol
3 , CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAAGGTCC 5 '
^赉 99"χ3Ρ¾ VNQ D Di DViDSS D DD D DSiOiDWO DO SiDYD 4 £
n d ■
s 6
s oin/ ea [ : x j¾AO ^auiTp B qe .ti .so i sqi.
S 赉 £9-χ3Ρ¾ VNQ
^赉 9"χ3 oΡ¾ VNQ
, ς ί 9 OWS¥i 3SS¥¥9¥SD¥D¥DSi3 SWDiDDVS iO¾"3 » £
T out ;p · ς £■ - 'dq gr : JB L AQ .ΐθΐπτρ e e^s ^som
^赉 19-χ3Ρ¾ VNQ
^赉 09"χ3Ρ¾ VNQ
^赉 6g-xspui VNa
8686.0/ll0ZN3/X3d 9.8.C0/Zl0Z OAV
The most stable dimer overa l l: 19 hp, - 33 . 6 kcal mol 5, ACAC C TTCCCTACAC GACGC C TCC GATC TTA AAT 3 '
3 ' CAC GACCTCAAGTCTGCACACGAGAAGGCTAGAA¾TATT 5 '
DNA Index-67 接头
The most stable dimer overall: 19 bp , -36 . 1 kcal /mol 3 ' CACTGACCTCAAGTCTGCACACGAGAAGGCTAGAAAGGTG 5 ' 根据本发明的一些实施例, 本发明提供了一些 DNA标签接头, 其中 DNA标签文库 的 DNA标签接头在 3,末端包含根据本发明实施例的标签,并且优选地同时用作 5,接头和 3'接头, 所述一组 DNA标签接头包括如下或由如下组成: 表 1所示 67个 DNA标签接头与 其所包含的 DNA标签序列相差 1个碱基的 DNA标签接头中的至少 5个, 或至少 10个, 或 至少 15个, 或至少 20个, 至少 25个, 或至少 30个, 或至少 35个, 或至少 40个, 或 45个, 或至少 50个, 或至少 55个, 或至少 60个, 或全部 67个。 才艮据本发明的具体示例, 所述一 组 DNA标签接头优选地至少包括表 1所示的 67个 DNA标签接头中的 DNA Index - 1F/R_adapte ~ DNA Index - 5F/R_adapter, 或 DNA Index - 6F/R_adapte ~ DNA Index - 10F/R_adapter , 或 DNA Index - 11F/R_adapte - DNA Index - 15F/R_adapter , 或 DNA Index - 16F/R_adapte ~ DNA Index - 20F/R_adapter,或 DNA Index - 21F/R_adapte ~ DNA Index - 25F/R_adapter, 或 DNA Index _ 26F/R_adapte ~ DNA Index _ 30F/R_adapter, 或 DNA Index - 31F/R_adapte ~ DNA Index - 35F/R_adapter , 或 DNA Index - 36F/R_adapte ~ DNA Index - 40F/R_adapter, 或 DNA Index - 41F/R_adapte ~ DNA Index - 45F/R_adapter, 或 DNA Index - 46F/R_adapte ~ DNA Index - 50F/R_adapter, 或 DNA Index - 51F/R_adapte ~ DNA Index - 55F/R_adapter,或 DNA Index - 56F/R_adapte ~ DNA Index - 60F/R_adapter, 或 DNA Index _ 61F/R_adapte ~ DNA Index _ 65F/R_adapter, 或 DNA Index - 66F/R_adapte ~ DNA Index - 67F/R_adapter,或者他们任何两个或 个的组 合。 根据具体的示例, 相差 1个碱基包括对标签序列中 1个碱基的取代、 添加或删除。 根 据本发明的实施例, 还提供了 DNA标签接头用于 DNA标签文库构建并测序的用途, 所 述 DN A标签接头同时用作 DN A标签文库的 5,接头和 3,接头。由此,根据本发明的实施例, 还提供了使用上述 DNA标签接头构建的 DNA标签文库, 其中所述 DNA标签接头同时用 作 DNA标签文库的 5,接头和 3,接头。
根据本发明的另一方面, 本发明还提供了一种利用上述寡核苷酸(DNA标签接头) 构建 DNA标签文库的方法。 具体地, 根据本发明的实施例, 参考图 2 , 该方法包括: 首先, 将 DNA样品随机打断, 以便获得随机片段。 根据本发明的实施例, DNA 样品的来源并不受特别限制。 根据本发明的一个实施例, DNA样品为人 DNA样品。 更 具体的, 可以为人基因组 DNA样品。 发明人发现, 利用根据本发明实施例的方法, 能 够有效地构建多种常见模式生物的 DNA标签文库。 根据本发明的实施例, 所得的随机 片段的长度为大约 180bp , 由此能够进一步提高构建 DNA标签文库以及后续测序的效 率。
其次, 将得到的随机片段进行末端修复, 以便获得经过末端修复的随机片段。 接着, 在经过末端修复的随机片段的 3,末端添加碱基 A, 以便获得具有粘性末端 A的随机片段。 根据本发明的实施例, 经过末端修复的随机片段具有两条寡核苷酸链, 其中, 碱基 A即是添加在所述两条寡核苷酸链的 3,末端, 且两条寡核苷酸链上都要添 加。
接下来, 将具有粘性末端 A的随机片段与 DNA标签接头相连, 以便获得连接有 DNA 标签接头的连接产物。 其中, DNA标签接头为选自上述根据本发明实施例的分离的寡 核苷酸的一种, 即 DNA标签接头包含上述根据本发明实施例的一组分离的 DNA标签的 一种。 根据本发明的实施例, 具有粘性末端 A的随机片段与 DNA标签接头相连, 是通过 在具有粘性末端 A的随机片段的两条寡核苷酸链的 3,末端均连接 DN A标签接头实现的。 上述根据本发明的实施例所得到的 "连接有 DNA标签接头的连接产物" , 含有目的片 段、 DNA接头, 以及标签。 这里所使用的术语 "目的片段" , 其序列与随机片段(DNA ) 的序列相对应。 其中, 随机片段是指根据本发明的实施例的构建 DNA标签文库的方法 中将 DNA样品随机打断之后获得的 DNA片段。 该目的片段的序列与随机片段的序列相 对应, 其含义是指, 可以通过目的片段的序列直接推导出随机片段的序列, 例如, 目的 片段的序列可以与随机片段的序列完全相同, 也可以是完全互补, 甚至是增加或者减少 了已知数目的已知碱基, 只要能够通过有限的计算获得的 DNA的序列即可。
然后, 对所得的连接有 DNA标签接头的连接产物进行扩增, 以便获得扩增产物, 以及分离回收扩增产物, 所回收的扩增产物构成所述 DNA标签文库。 根据本发明的实 施例, 对连接有 DNA标签接头的连接产物进行扩增的方法并不受特别限制。 根据本发 明的具体示例, 可以釆用 PCR反应对所得到文库片段进行扩增。 本领域技术人员可以 根据文库片段的序列, 确定进行 PCR反应的引物。 根据本发明的具体示例, 当釆用下 面的 PCR方案时, 能够实现有效地扩增, 具体地, 利用分别具有如 SEQ ID NO: 202 和 SEQ ID NO: 203 所示核苷酸序列的引物进行 PCR反应。根据本发明的实施例, PCR 反应所得的扩增产物的长度为大约 280-300bp。 另外, 根据本发明的实施例, 分离回收 扩增产物的方法也不受特别限制,本领域技术人员可以根据扩增产物的特点选择适当的 方法和设备进行分离, 例如可以通过电泳并且回收特定长度的目的片段的方法进行回 收。
进一步, 根据本发明的实施例, 本发明提供了一种构建 DNA标签文库的方法, 其 包括:
1 )提供 n个 DNA样品, n为整数且 1 < n < 67的整数, 优选地 n为整数且 2 < n < 67 , 所述 DNA样品来自所有真核和原核 DNA样品, 包括但不限于人 DNA样品;
2 )将人基因组 DNA打断, 其中打断方法包括但不限于超声波打断方法, 优选地 使打断后的 DNA条带集中在 180 bp左右;
3 ) 末端修复;
4 ) DNA片段 3,末端加碱基 "A" ;
5 )连接 DNA标签接头, 其中优选地每一个标签接头连接到 DNA片段的两端, ;
6 ) 将步骤 5 ) 得到的连接产物进行凝胶回收纯化, 优选地通过 2 %的琼脂糖胶进 行电泳并回收, 并将各个 DNA样品的回收产物混合在一起;
7 ) PCR反应, 使用步骤 6 ) 的回收产物的混合物作为模板, 在适于扩增目的核酸 的条件下进行 PCR扩增, 将 PCR产物进行胶回收纯化, 优选地回收 280 ~ 300bp的目 的片段。
根据本发明的实施例, 通过上述根据本发明实施例的构建 DNA标签文库的方法所 构建的 DNA标签文库, 其 DNA标签接头包括如下或由如下组成: 表 1所示 67个 DNA标签 接头与其所包含的 DNA标签序列相差 1个碱基的 DNA标签接头中的至少 5个, 或至少 10 个, 或至少 15个, 或至少 20个, 至少 25个, 或至少 30个, 或至少 35个, 或至少 40个, 或 45个, 或至少 50个, 或至少 55个, 或至少 60个, 或全部 67个。 #居本发明的实施例, 上 述根据本发明实施例的构建 DNA标签文库的方法中, 釆用的 DNA标签接头优选地至少 包括表 1所示的 67个 DNA标签接头中的 DNA Index - 1F/R_adapte ~ DNA Index - 5F/R_adapter, 或 DNA Index - 6F/R_adapte ~ DNA Index - 10F/R_adapter, 或 DNA Index - 11F/R_adapte ~ DNA Index - 15F/R_adapter , 或 DNA Index - 16F/R_adapte ~ DNA
Index - 20F/R_adapter, 或 DNA Index - 21F/R_adapte - DNA Index - 25F/R_adapter, 或 DNA Index - 26F/R_adapte ~ DNA Index - 30F/R_adapter , 或 DNA Index - 31F/R_adapte ~ DNA Index - 35F/R_adapter, 或 DNA Index - 36F/R_adapte ~ DNA Index - 40F/R_adapter, 或 DNA Index - 41F/R_adapte ~ DNA Index - 45F/R_adapter, 或 DNA Index - 46F/R_adapte ~ DNA Index - 50F/R_adapter,或 DNA Index - 51F/R_adapte ~ DNA Index - 55F/R_adapter, 或 DNA Index - 56F/R_adapte - DNA Index - 60F/R_adapter, 或 DNA Index - 61F/R_adapte ~ DNA Index - 65F/R_adapter , 或 DNA Index - 66F/R_adapte - DNA Index - 67F/R_adapter, 或者他们任何两个或多个的组合。 根据本 发明的实施例, 相差 1个碱基包括标签中 1个碱基的取代、 添加或删除。 根据本发明的实 施例, 上述根据本发明实施例的构建 DNA标签文库的方法的步骤 7 ) PCR反应中使用的 引物包括
PE PCR Primers 1.0:
CGATCT; 和
PE PCR Primers 2.0:
CCGATCT。
利用根据本发明实施例的构建 DNA标签文库的方法, 能够有效地将根据本发明实 施例的 DNA标签引入到针对 DNA样品所构建的 DNA标签文库中。 从而可以通过对 DNA标签文库进行测序, 获得 DNA样品的序列信息以及 DNA标签的序列信息, 从而 能够对 DNA样品的来源进行区分。 另外, 发明人惊奇地发现, 当针对相同的样品, 基 于上述方法, 釆用具有不同标签的寡核苷酸构建含有各种 DNA标签的 DNA标签文库 时, 所得到的测序数据结果的稳定性和可重复性非常好。
另外, 根据本发明的实施例, 本申请的发明人惊奇地发现, 将标签嵌入 DNA接头 中, 通过连接 DNA标签接头来构建 DNA标签文库, 将连接上 DNA标签接头的产物混 合在一起, 一次 PCR反应就可完成对需要混合的所有标签文库的构建。 不仅能提高目 前 DNA样品的测序通量, 也能提高文库制备的效率和标签的识别率, 极大的降低了单 个文库的测序费用。
根据本发明的实施例,本发明对 Illumina提供的 DNA接头序列进行优化,在接头 中引入标签序列, 通过 DNA标签接头的连接将标签序列导入目的文库中。 在接头连接 后的 PCR反应中, 也就无需使用额外的标签 PCR引物, 从而精简了引物合成的步骤, 降低了 PCR反应的难度, 提高了 PCR反应的特异性。 目前为止, 通过这些 DNA标签 接头导入标签的 DNA文库构建方法及其标签序列, 并没有相关的报道。 根据本发明的 实施例,与 Illumina公司的 DNA接头相比,本发明的 DNA标签接头,是优化后的 DNA 标签接头, 这些 DNA标签接头提高了接头连接的效率, 并提高了标签序列的识别效率 及标签的数量。 具体情况, 可比较参照图 1和图 2, 其中图 1 所示的 Illumina公司的 DNA 标签文库构建方法的流程图, 图 2所示的 #居本发明的实施例的 DNA 标签文库 构建方法放入流程图。
根据本发明的再一方面, 本发明还提供了一种用于构建 DNA标签文库的试剂盒。 根据本发明的实施例, 该试剂盒包括: 67种分离的寡核苷酸, 这 67种分离的寡核苷 酸具有第一链和第二链, 在所述第一链上形成有粘性末端 T, 并且所述第一链分别由 SEQ ID NO: ( 3N-1 ) 所示的核苷酸构成, 所述第二链分别由 SEQ ID NO: ( 3N ) 所 示的核苷酸构成, 其中, 对于相同的寡核苷酸, 其第一链和第二链的 N取值相同, 并 且 N=l-67的整数, 其中, 这 67种分离的寡核苷酸分别设置在不同的容器中。 由此, 利用该试剂盒, 能够方便地将根据本发明实施例的 DNA标签引入到构建的 DNA标签 文库中。 当然, 本领域技术人员能够理解, 试剂盒中还可以包含其他用于构建 DNA标
签文库的常规组件, 在此不再赘述。
DNA标签文库及测序方法
根据本发明的又一方面, 本发明还提供了一种 DNA标签文库, 其是根据本发明的 构建 DNA标签文库的方法所构建的。 该具有标签的 DNA标签文库可以有效地应用于 高通量测序技术例如 Solexa技术, 从而可以通过获得标签序列, 来对所获得的核酸序 列信息例如 DNA序列信息来精确地进行样品来源分类。
根据本发明的又一方面, 本发明还提供了一种确定 DNA样品序列信息的方法。 根 据本发明的实施例, 其包括: 根据本发明实施例的构建 DNA 标签文库的方法, 构建 DNA标签文库; 接着, 对所构建的 DNA标签文库进行测序, 以确定 DNA样品的序列 信息。 基于该方法, 能够有效地获得 DNA标签文库中 DNA样品的序列信息以及 DNA 标签的序列信息, 从而能够对 DNA样品的来源进行区分。 另外, 发明人惊奇地发现, 利用根据本发明实施例的方法确定 DNA样品序列信息, 能够有效地减少数据产出偏向 性的问题, 并且能够精确地对多种 DNA标签文库进行区分。 根据本发明的实施例, 可 以釆用任何已知的方法对所构建的 DNA标签文库进行测序, 其类型并不受特别限制。 根据本发明的一些示例, 可以利用 Solexa测序技术对 DNA标签文库进行测序。 根据本 发明的实施例, 可以根据具体情况选择合适的测序引物进行测序。
进一步, 可以将上面确定 DNA样品序列信息的方法应用于多种样品。 例如, 根据 本发明的实施例, 本发明提供了一种确定多种样品 DNA序列信息的方法。 根据本发明 的实施例, 其包括以下步骤: 针对多种样品的每一种, 分别独立地根据根据本发明的实 施例的构建 DNA标签文库的方法, 构建该 DNA样品的 DNA标签文库, 其中, 不同的 DNA样品釆用相互不同并且已知序列的 DNA标签, 这里所使用的术语 "多种"为 2-67 种。 将得到的多种样品的 DNA标签文库进行组合, 以便获得 DNA标签文库混合物。 利用 Solexa测序技术, 对所得的 DNA标签文库混合物进行测序, 从而获得 DNA样品 的序列信息以及标签的序列信息。 最后, 基于标签的序列信息, 对 DNA样品的序列信 息进行分类, 以便确定所述多种样品 DNA的序列信息。 由此, 根据本发明实施例的该 方法, 可以充分利用高通量的测序技术, 例如利用 Solexa测序技术, 同时对多种样品 的 DNA文库进行测序, 从而提高 DNA文库测序的效率和通量, 同时可以提高确定多 种样品 DNA的序列信息的效率。 关于测序的方法和釆用的测序引物, 前面已经进行了 详细描述, 此处不再赞述。
需要说明的是, 根据本发明实施例的确定 DNA样品序列信息的方法是本申请的发 明人经过艰苦的创造性劳动和优化工作才完成的。 下面将结合实施例对本发明的方案进行解释。 本领域技术人员将会理解, 下面的实 施例仅用于说明本发明, 而不应视为限定本发明的范围。 实施例中未注明具体技术或条 件的, 按照本领域内的文献所描述的技术或条件(例如参考 J.萨姆布鲁克等著, 黄培堂 等译的 《分子克隆实验指南》 , 第三版, 科学出版社)或者按照产品说明书进行。 所用 试剂或仪器未注明生产厂商者, 均为可以通过市购获得的常规产品, 例如可以釆购自 Illumina公司。
实施例 1
Paired End DNA寡核苷酸序列:
PE PCR Primers 1.0
CGATCT ( SEQ ID NO: 202 )
PE PCR Primers 2.0
CCGATCT ( SEQ ID NO: 203 )
实施例 1
1. 方法步骤
1.1 DNA打断
按照 Illumnia公司提供的说明书 ( Preparing samples for multiplexed Paired-End sequencing; illumina part # 1005361 Rev. B , 通过参照并入本文), 将人全血基因组 DNA 5微克使用 Covaris打碎仪打断 6分钟(参数设置: Duty cycle(负载比)一20% ; Intensity (强度)—5.0 ; Bursts per second (每秒钟脉冲)一 200 ; Duration (持续时间)一 40 seconds ; Mode (模式 )― Frequency sweeping (频率扫描 ) ; Power (功率 )― 33-34W ; Temperature (温度)_5.5 to 6 °C ) , 使其在琼脂糖电泳中显示的主要条带集中在 180 bp 左右。
1.2 末端修复
按照下列的配比准备反应混合:
打断后的 DNA片段 35 微升
T4 DNA连接酶緩冲液 50微升
dNTPs 混合液 4微升
T4 DNA聚合酶 5微升
Klenow DNA 聚合酶 1微升
T4多聚核苷酸激酶 5微升 总体积 100 ^:升
将舒适型恒温混匀器调至 20 °C , 反应 30 min 然后用 QIAquick PCR 纯化试剂盒 进行纯化, 最后将样品溶于 32微升溶解緩冲液。
1.3 DNA片段 3'末端加碱基 "A"
按照下列的配比准备反应混合物:
末端修复后的 DNA 32微升 Klenow酶緩冲液 5微升
dATP(lmM) 10微升
Klenow酶 (3' 到 5'外切酶活性) 3微升 总体积 50微升
将舒适型恒温混匀器调至 37 °C , 反应 30min , 然后用 MiniElute PCR 纯化试剂盒 进行纯化, 最后将样品溶于 10微升 Elution Buffer 0
1.4 连接 DNA标签接头
按照下列的配比准备反应混合物, :
上述步骤得到的 DNA 10微升
T4 DNA 连接酶緩冲液 25 ^敫升
DNA Index-N接头 (takara公司合成) 10微升
T4DNA 连接酶 5微升
总体积 50微升
注: 对于不同的样品, 使用不同的 DNA Index-N接头 ( N = 1 ~ 67 ) 。 所使用的 DNA Index-N接头可为表 1 中所示任一对 DNA Index - NF _adapter和 DNA Index - NR_adapter退火后形成的 DNA标签接头。
将舒适型恒温混匀器调至 20°C , 反应 15min, 然后用 QIAquick PCR纯化试剂盒 进行纯化, 最后将样品溶于 30微升溶解緩冲液中。
1.5 连接产物的胶回收纯化
将连接产物于 2%的琼脂糖胶中进行电泳分离; 随后将 280~300 bp的目的片段放 入 Eppendorf管中。 用 QIAquick 胶纯化试剂盒进行胶纯化回收, 回收产物溶于 30微升 Elution Buffer。
1.6 PCR反应
PCR反应: 按照下列的反应体系准备反应混合物, 将试剂放置于水上。
胶回收纯化后的 DNA 10微升
PE PCR Primers 1.0 1微升
PE PCR Primers 2.0 1 敫升
Phusion DNA 聚合酶 25微升
ddH20 13微升
总体积 50微升
PCR反应条件
1.7 PCR产物的胶回收纯化
将 PCR 产物于 2%琼脂糖胶中电泳分离, 切割回收 280~300bp 的目的片段, 用 QIAquick 胶纯化试剂盒进行胶纯化回收, 回收产物溶于 30微升洗脱緩冲液。
1.8 DNA制备产物检测
使用 Agilent 2100 Bioanalyzer, 根据生产商说明书的操作方法, 检测文库产量(见 图 4 ) 。
2. 结果分析
图 3显示了根据本实施例的构建的 67个 DNA标签文库的电泳结果。 该图中, 分 别使用了 D2000和 50bp的 marker, 分别产自天根公司和 NEB公司; 箭头所标记的为 目的文库片段大小。在图 3 a-c的电泳结果中, 自左向右分别为泳道 1至泳道 25。 其中, ( a )是 DNA标签接头文库测试 ( index l~index23 ) 电泳检测结果 (泳道 1和泳道 25 分别是 D2000 makrer和 50bp marker ^ 泳道 2到泳道 24分别是使用 DNA标签接头 index l~index23构建的文库 ) ; ( b ) 是 DNA标签接头文库测试 ( index23~index44 )
电泳检测结果 (泳道 1和泳道 25分别是 D2000 makrer和 50bp marker ^ 泳道 2到泳道 24分别是使用 DNA标签接头 index23~index44构建的文库,其中泳道 14为试验的阴性 对照, 即没有样品) ; (c ) 是 DNA标签接头文库测试 (index45~index67 ) 电泳检测 结果(泳道 1和泳道 25分别是 D2000 makrer和 50bp marker ^ 泳道 2到泳道 24分别使 用 DNA标签接头 index45~index67构建的文库) 。 如图 3结果显示, 根据本实施例构 建的 67个 DNA标签文库数据质量很好。
图 4显示了根据本实施例的构建的 DNA标签文库使用 Agilent2100检测的结果。 该图中中, 样品名为 Agilent3 , 图中峰从左到右分别代表 Marker, 样品片段大小, Marker。 根据图 4结果显示, 所测文库片段大小为 284bp , 浓度为 32.64纳克 /微升, 文库大小和浓度均合格。
另外, Solexa测序结果统计: 标签完全识别即 0错误匹配( mismatch ) 占 98.43% , 标签测出错误 1个碱基即 1错误匹配的占 0.09% ,其他读取结果( other reads )占 1.48% , 所以测序结果标签的识别率为 98.5% , 可以满足 Solexa DNA index的测序要求。 并且针 对相同样品, 釆用不同标签进行测序时, 数据稳定性和重现性非常好。
工业实用性
本发明的用于构建 DNA标签文库的 DNA标签、 寡核苷酸、 DNA标签文库及其制 备方法、 数字基因表达谱及其建立方法、 确定 DNA样品序列信息的方法、 确定多种样 品 DNA序列信息的方法以及用于构建 DNA标签文库的试剂盒,能够应用于 DNA测序, 并且能够有效地提高测序平台, 例如 Solexa测序平台的测序通量。
尽管本发明的具体实施方式已经得到详细的描述, 本领域技术人员将会理解。 根 据已经公开的所有教导, 可以对那些细节进行各种修改和替换, 这些改变均在本发明的 保护范围之内。 本发明的全部范围由所附权利要求及其任何等同物给出。
在本说明书的描述中, 参考术语 "一个实施例" 、 "一些实施例" 、 "示意性实施 例" 、 "示例" 、 "具体示例" 、 或 "一些示例" 等的描述意指结合该实施例或示例描 述的具体特征、 结构、 材料或者特点包含于本发明的至少一个实施例或示例中。 在本说 明书中, 对上述术语的示意性表述不一定指的是相同的实施例或示例。 而且, 描述的具 体特征、 结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结 合。
Claims
权利要求书
I. 一组分离的 DNA标签, 其由 SEQ ID NO: ( 3N-2 ) 所示的核苷酸构成, 其中 N=l-67的任意整数。
2、一组分离的寡核苷酸, 所述分离的寡核苷酸具有第一链和第二链, 其中所述第 一链分别由 SEQ ID NO: ( 3N-1 ) 所示的核苷酸构成, 所述第二链分别由 SEQ ID NO: ( 3N )所示的核苷酸构成, 其中, 对于相同的寡核苷酸, 其第一链和第二链的 N取值相 同, 并且 N=l-67的整数。
3、 一种构建 DNA标签文库的方法, 其特征在于, 包括以下步骤:
将 DNA样品随机打断, 以便获得随机片段;
将所述随机片段进行末端修复, 以便获得经过末端修复的随机片段;
在所述经过末端修复的随机片段的 3,末端添加碱基 A, 以便获得具有粘性末端 A 的随机片段;
将所述具有粘性末端 A的随机片段与 DNA标签接头相连, 以便获得连接有 DNA 标签接头的连接产物, 其中所述 DNA标签接头包含选自权利要求 1所述的一组分离的 DNA标签的一种;
对所述连接有 DNA标签接头的连接产物进行扩增, 以便获得扩增产物; 以及 分离回收所述扩增产物, 所述扩增产物构成所述 DNA标签文库。
4、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
所述 DNA样品为人 DNA样品。
5、 根据权利要求 4所述的构建 DNA标签文库的方法, 其特征在于,
所述 DNA样品为人基因组 DN A样品。
6、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
所述随机片段的长度为大约 180bp。
7、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
所述经过末端修复的随机片段具有两条寡核苷酸链,
其巾,
在所述两条寡核苷酸链的 3,末端均添加碱基 A; 以及
在所述两条寡核苷酸链的 3,末端均连接 DNA标签接头。
8、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
所述 DNA标签接头为选自权利要求 2所述的分离的寡核苷酸的一种。
9、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
所述扩增产物的长度为大约 280-300bp。
10、 根据权利要求 3所述的构建 DNA标签文库的方法, 其特征在于,
对所述连接有 DNA标签接头的连接产物进行扩增, 是通过 PCR反应进行的, 所 述 PCR反应釆用分别具有如 SEQ ID NO: 202和 SEQ ID NO: 203 所示核苷酸序列的 引物。
I I、 一种 DNA标签文库, 其是通过根据权利要求 3-10任一项所述的方法构建的。
12、 一种确定 DNA样品序列信息的方法, 其包括下列步骤:
根据权利要求 3-10任一项所述的方法构建所述 DNA样品的 DNA标签文库; 以 及
对所述 DNA标签文库进行测序, 以便确定所述 DNA样品的序列信息。
13、 根据权利要求 12所述的确定 DNA样品序列信息的方法, 其特征在于, 对所述 DNA标签文库进行测序是利用 Solexa测序技术进行的。
14、 一种确定多种样品 DNA序列信息的方法, 其包括下列步骤:
针对所述多种样品的每一种, 分别独立地根据权利要求 3-10任一项所述的方法, 建立所述 DNA样品的 DNA标签文库, 其中, 不同的 DNA样品釆用相互不同并且已知 序列的 DNA标签, 其中所述多种为 2-67种;
将所述多种样品的 DNA标签文库进行组合, 以便获得 DNA标签文库混合物; 利用 Solexa测序技术, 对所述 DNA标签文库混合物进行测序, 以获得所述 DNA 样品的序列信息以及所述标签的序列信息; 以及
基于所述标签的序列信息对所述 DNA样品的序列信息进行分类, 以便确定所述 多种样品的 DNA序列信息。
15、 一种用于构建 DNA标签文库的试剂盒, 其包括:
67 种分离的寡核苷酸, 所述分离的寡核苷酸具有第一链和第二链, 其中所述第一 链分别由 SEQ ID NO: ( 3N-1 ) 所示的核苷酸构成, 所述第二链分别由 SEQ ID NO:
( 3N ) 所示的核苷酸构成, 其中, 对于相同的寡核苷酸, 其第一链和第二链的 N取值 相同, 并且 N=l-67的整数,
其中, 所述 67种分离的寡核苷酸分别设置在不同的容器中。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010299257.3 | 2010-09-21 | ||
CN 201010299257 CN102409045B (zh) | 2010-09-21 | 2010-09-21 | 一种基于dna接头连接的标签文库构建方法及其所使用标签和标签接头 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012037876A1 true WO2012037876A1 (zh) | 2012-03-29 |
Family
ID=45873441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/079898 WO2012037876A1 (zh) | 2010-09-21 | 2011-09-20 | Dna标签及其应用 |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN102409045B (zh) |
HK (1) | HK1168626A1 (zh) |
WO (1) | WO2012037876A1 (zh) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103374759A (zh) * | 2012-04-26 | 2013-10-30 | 中国科学院上海生命科学研究院 | 一种检测肺癌转移标志性snp的方法及其应用 |
WO2016037358A1 (zh) * | 2014-09-12 | 2016-03-17 | 深圳华大基因科技有限公司 | 分离的寡核苷酸及其在核酸测序中的用途 |
TWI617616B (zh) * | 2014-05-20 | 2018-03-11 | 信越化學工業股份有限公司 | 導電性聚合物複合體及基板 |
CN108027357A (zh) * | 2015-08-03 | 2018-05-11 | 安全追踪公司 | 用于验证生鲜农产品的卫生和洗涤水系统的基于包裹标记dna的病原体替代物 |
CN110468188A (zh) * | 2019-08-22 | 2019-11-19 | 广州微远基因科技有限公司 | 用于二代测序的标签序列集及其设计方法和应用 |
US11200383B2 (en) | 2018-08-28 | 2021-12-14 | Safetraces, Inc. | Product tracking and rating system using DNA tags |
US11692988B2 (en) | 2014-05-06 | 2023-07-04 | Safetraces, Inc. | DNA based bar code for improved food traceability |
US11801512B2 (en) | 2018-01-10 | 2023-10-31 | Safe Traces, Inc. | Dispensing system for applying DNA taggants used in combinations to tag articles |
US11853832B2 (en) | 2018-08-28 | 2023-12-26 | Safetraces, Inc. | Product tracking and rating system using DNA tags |
US12016967B2 (en) | 2018-04-25 | 2024-06-25 | Safetraces, Inc. | Sanitation monitoring system using pathogen surrogates and surrogate tracking |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103571822B (zh) * | 2012-07-20 | 2016-03-30 | 中国科学院植物研究所 | 一种用于新一代测序分析的多重目的dna片段富集方法 |
CN102952877B (zh) * | 2012-08-06 | 2014-09-24 | 深圳华大基因研究院 | 检测α珠蛋白基因拷贝数的方法和系统 |
CN103290104B (zh) * | 2013-01-23 | 2016-03-02 | 北京诺禾致源生物信息科技有限公司 | 一种应用于第二代测序的简捷廉价的基因组样品破碎方法 |
WO2016049929A1 (zh) * | 2014-09-30 | 2016-04-07 | 天津华大基因科技有限公司 | 构建测序文库的方法及其应用 |
CN105506125B (zh) * | 2016-01-12 | 2019-01-22 | 上海美吉生物医药科技有限公司 | 一种dna的测序方法及一种二代测序文库 |
CN105734048A (zh) * | 2016-02-26 | 2016-07-06 | 武汉冰港生物科技有限公司 | 一种基因组DNA的PCR-free测序文库制备方法 |
AU2017385424B2 (en) * | 2016-12-27 | 2024-06-27 | Qingdao MGI Tech Co., Ltd. | Single fluorescent dye based sequencing method |
CN108728903A (zh) * | 2017-04-21 | 2018-11-02 | 深圳市乐土精准医疗科技有限公司 | 基于高通量测序用于地中海贫血大样本筛查的建库方法 |
CN108949905B (zh) * | 2017-05-23 | 2022-05-17 | 深圳华大基因股份有限公司 | 对照文库及其构建方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008093098A2 (en) * | 2007-02-02 | 2008-08-07 | Illumina Cambridge Limited | Methods for indexing samples and sequencing multiple nucleotide templates |
CN101395280A (zh) * | 2006-03-01 | 2009-03-25 | 凯津公司 | 基于测序的高通量SNPs连接检测技术 |
CN101434988A (zh) * | 2007-11-16 | 2009-05-20 | 深圳华因康基因科技有限公司 | 一种高通量寡核苷酸测序方法 |
WO2010053587A2 (en) * | 2008-11-07 | 2010-05-14 | Mlc Dx Incorporated | Methods of monitoring conditions by sequence analysis |
CN101748213A (zh) * | 2008-12-12 | 2010-06-23 | 深圳华大基因研究院 | 一种环境微生物检测方法和系统 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0400584D0 (en) * | 2004-01-12 | 2004-02-11 | Solexa Ltd | Nucleic acid chacterisation |
CN100564618C (zh) * | 2007-06-13 | 2009-12-02 | 北京万达因生物医学技术有限责任公司 | 分子置换标签测序并行检测法即寡聚核酸代码标签分子库微球阵列分析 |
-
2010
- 2010-09-21 CN CN 201010299257 patent/CN102409045B/zh active Active
-
2011
- 2011-09-20 WO PCT/CN2011/079898 patent/WO2012037876A1/zh active Application Filing
-
2012
- 2012-09-24 HK HK12109359.2A patent/HK1168626A1/xx unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101395280A (zh) * | 2006-03-01 | 2009-03-25 | 凯津公司 | 基于测序的高通量SNPs连接检测技术 |
WO2008093098A2 (en) * | 2007-02-02 | 2008-08-07 | Illumina Cambridge Limited | Methods for indexing samples and sequencing multiple nucleotide templates |
CN101434988A (zh) * | 2007-11-16 | 2009-05-20 | 深圳华因康基因科技有限公司 | 一种高通量寡核苷酸测序方法 |
WO2010053587A2 (en) * | 2008-11-07 | 2010-05-14 | Mlc Dx Incorporated | Methods of monitoring conditions by sequence analysis |
CN101748213A (zh) * | 2008-12-12 | 2010-06-23 | 深圳华大基因研究院 | 一种环境微生物检测方法和系统 |
Non-Patent Citations (2)
Title |
---|
JIANG CHENG-TAO ET AL.: "A study on co-amplification of the 18 CODIS STR Loci.", FORENSIC SCIENCE AND TECHNOLOGY, 15 October 2007 (2007-10-15), pages 7 - 8 * |
NG, PATRICK ET AL.: "Multiplex sequencing of paired-end ditags (MS-PET): a strategy for the ultra-high-throughout analysis oftranscriptomes and genomes.", NUCLEIC ACIDS RESEARCH, vol. 34, no. 12, 13 July 2006 (2006-07-13), pages E84 * |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103374759A (zh) * | 2012-04-26 | 2013-10-30 | 中国科学院上海生命科学研究院 | 一种检测肺癌转移标志性snp的方法及其应用 |
US11692988B2 (en) | 2014-05-06 | 2023-07-04 | Safetraces, Inc. | DNA based bar code for improved food traceability |
TWI617616B (zh) * | 2014-05-20 | 2018-03-11 | 信越化學工業股份有限公司 | 導電性聚合物複合體及基板 |
WO2016037358A1 (zh) * | 2014-09-12 | 2016-03-17 | 深圳华大基因科技有限公司 | 分离的寡核苷酸及其在核酸测序中的用途 |
US9890375B2 (en) | 2014-09-12 | 2018-02-13 | Bgi Shenzhen Co., Limited | Isolated oligonucleotide and use thereof in nucleic acid sequencing |
US10023906B2 (en) | 2014-09-12 | 2018-07-17 | Mgi Tech Co., Ltd. | Method for constructing nucleic acid single-stranded cyclic library and reagents thereof |
US10995367B2 (en) | 2014-09-12 | 2021-05-04 | Mgi Tech Co., Ltd. | Vesicular adaptor and uses thereof in nucleic acid library construction and sequencing |
US10544451B2 (en) | 2014-09-12 | 2020-01-28 | Mgi Tech Co., Ltd. | Vesicular linker and uses thereof in nucleic acid library construction and sequencing |
US10962512B2 (en) | 2015-08-03 | 2021-03-30 | Safetraces, Inc. | Pathogen surrogates based on encapsulated tagged DNA for verification of sanitation and wash water systems for fresh produce |
CN108027357A (zh) * | 2015-08-03 | 2018-05-11 | 安全追踪公司 | 用于验证生鲜农产品的卫生和洗涤水系统的基于包裹标记dna的病原体替代物 |
US11801512B2 (en) | 2018-01-10 | 2023-10-31 | Safe Traces, Inc. | Dispensing system for applying DNA taggants used in combinations to tag articles |
US12016967B2 (en) | 2018-04-25 | 2024-06-25 | Safetraces, Inc. | Sanitation monitoring system using pathogen surrogates and surrogate tracking |
US11200383B2 (en) | 2018-08-28 | 2021-12-14 | Safetraces, Inc. | Product tracking and rating system using DNA tags |
US11699045B2 (en) | 2018-08-28 | 2023-07-11 | Safetraces, Inc. | Product tracking and rating system using DNA tags |
US11853832B2 (en) | 2018-08-28 | 2023-12-26 | Safetraces, Inc. | Product tracking and rating system using DNA tags |
CN110468188A (zh) * | 2019-08-22 | 2019-11-19 | 广州微远基因科技有限公司 | 用于二代测序的标签序列集及其设计方法和应用 |
CN110468188B (zh) * | 2019-08-22 | 2023-08-22 | 广州微远医疗器械有限公司 | 用于二代测序的标签序列集及其设计方法和应用 |
Also Published As
Publication number | Publication date |
---|---|
CN102409045A (zh) | 2012-04-11 |
CN102409045B (zh) | 2013-09-18 |
HK1168626A1 (en) | 2013-01-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2012037876A1 (zh) | Dna标签及其应用 | |
US20210363570A1 (en) | Method for increasing throughput of single molecule sequencing by concatenating short dna fragments | |
WO2012037882A1 (zh) | Dna标签及其应用 | |
WO2012037880A1 (zh) | Dna标签及其应用 | |
WO2012037877A1 (zh) | Dna标签及其应用 | |
US20220127597A1 (en) | Haplotagging - haplotype phasing and single-tube combinatorial barcoding of nucleic acid molecules using bead-immobilized tn5 transposase | |
AU2021204166B2 (en) | Reagents, kits and methods for molecular barcoding | |
US9334532B2 (en) | Complexity reduction method | |
WO2012037884A1 (zh) | Dna标签及其应用 | |
WO2021052310A1 (zh) | 一种dna文库构建方法 | |
TW201321518A (zh) | 微量核酸樣本的庫製備方法及其應用 | |
US9758780B2 (en) | Whole genome mapping by DNA sequencing with linked-paired-end library | |
US20180223350A1 (en) | Duplex adapters and duplex sequencing | |
WO2018113799A1 (zh) | 构建简化基因组文库的方法及试剂盒 | |
WO2012037875A1 (zh) | Dna标签及其应用 | |
US20140336058A1 (en) | Method and kit for characterizing rna in a composition | |
WO2022199242A1 (zh) | 一组条码接头以及中通量多重单细胞代表性dna甲基化建库和测序方法 | |
EP2510114B1 (en) | Rna analytics method | |
WO2012037879A1 (zh) | 核酸标签及其应用 | |
WO2014086037A1 (zh) | 构建核酸测序文库的方法及其应用 | |
US20240352507A1 (en) | Method for increasing throughput of single molecule sequencing by concatenating short dna fragments | |
US20230348962A1 (en) | Using Hairpin Formation To Identify DNA and RNA Sequences Having A Target Nucleic Acid Sequence | |
CN116685696A (zh) | 从两端对多核苷酸片段进行测序的方法 | |
WO2005010184A1 (ja) | 変異の検出方法 | |
Radke | Assessment of MIPSTR for Capturing and Sequencing Human STRs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11826403 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 05-08-2013) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11826403 Country of ref document: EP Kind code of ref document: A1 |