71 results about "Transcription start" patented technology

A method for synthesizing cDNA possessing a consecutive sequence starting with a nucleotide adjacent to a cap structure of mRNA, which comprises (i) a process for annealing a double-stranded DNA primer and an RNA mixture containing mRNA possessing a cap structure, (ii) a process for preparing a conjugate of an mRNA/cDNA heteroduplex and a double-stranded DNA primer by synthesizing the first-strand cDNA primed with the double-stranded DNA primer using reverse transcriptase, and (iii) a process for circularizing the conjugate of the mRNA/cDNA heteroduplex and the double-stranded DNA primer by joining the 3' and 5' ends of the DNA strand containing cDNA using ligase. This method enables us to efficiently synthesize a full-length cDNA possessing a consecutive sequence starting with a transcription-start-site nucleotide from a small amount of RNA by small processes.

PCT No. PCT/JP97/03992 Sec. 371 Date Jul. 16, 1999 Sec. 102(e) Date Jul. 16, 1999 PCT Filed Oct. 31, 1997 PCT Pub. No. WO98/20122 PCT Pub. Date May 14, 1998Disclose is a method for making full-length cDNA libraries, which is for making libraries of cDNAs having lengths corresponding to full lengths of mRNAs and comprises the following steps of; forming RNA-DNA hybrids by reverse transcription starting from primers using mRNAs as templates, chemically binding a tag molecule to a diol structure present in the 5' Cap (7MeGpppN) site of a mRNA which is forming a RNA-DNA hybrid, and separating RNA-DNA hybrids carrying a DNA corresponding to a full-length mRNA from the RNA-DNA hybrids formed above by using a function of the tag molecule. The present method is a method for preparing full-length cDNA libraries utilizing a method for labeling the 5' Cap site more efficiently than protein enzyme reactions, which is avoidable a decrease of a full-length cDNA synthesis efficiency caused by cleavage of mRNA, and can synthesize a full-length cDNA more efficiently.

Late embryogenesis abundant (Lea) proteins accumulate in maturing seeds after many of the storage compounds have been synthesized, and they are considered relevant to maturation. We report here the molecular organization and expression of BnLea3-1, a novel Group 3 Lea gene from Brassica napus. BnLea3-1 contains a coding region of 798 bp, sharing 84.4% homology at the amino acid level with Lea76 of B. napus. Two tandem 11-mer repeats are truncated from the coding region of BnLea3-1, compared to the 13 conserved 11-mer repeats of Lea76. Substitutions of consensus residues are found at various positions within the 11-mer repeats. A 1561 bp 5′ flanking promoter fragment of BnLea3-1 fused to E. coli-glucuronidase (GUS) coding region conferred seed-specific GUS expression in stable transgenics of B. napus, tobacco and in transiently-transformed pea. A −137 bp minimal promoter preceding the first transcription start site, identified through progressive deletions from the upstream was sufficient for basal GUS expression in the seeds and in leaves treated with ABA. Deletion studies indicate the presence of enhancing elements located between −137 bp to −742 bp and suppressing elements located between −742 and −1561 bp. BnLea3-1 expression in seeds precedes that of Lea76. Unlike other Group 3 Lea members including HVA1 and Dc3, BnLea3-1 is active in seeds and responsive weakly in vegetative tissues to ABA and methyl jasmonate (MeJA) but not to stress treatments. Possible functions of BnLea3-1 and another member of the Group 3 Lea family BnLea3-2 in embryo development is discussed.

The invention discloses a DNA methylation marker used for diagnosis, screening, and prediction of male colorectal cancer. The DNA methylation marker is obtained via methylation of a combination of thefirst groups, or the first group with the second group, or the third groups, (1), +22, +27, and +29; (2), -24,-18, +89, and +92; and (3) +136; of three CpG sites in the front and back sequence of gene RPS24 transcription start site. The sequence number is based on sequence number in SEQ ID NO.1. The 143th site transcription start site A is recorded as +1. The invention also discloses a probe, a method, and a kit used for detecting the DNA methylation marker, and a computer module used for prediction of male colorectal cancer risk using the data of the DNA methylation sites.

The invention discloses a detection kit for TMEM101 gene methylation in human peripheral blood circulating tumor DNA for early screening of endometrial cancer. The detection kit is applied to early screening of endometrial cancer and comprises a methylation specific primer of a TMEM101 gene target site, a hydrolysis probe which is specific to the TMEM101 gene, and a primer of a reference gene and a hydrolysis probe of the reference gene, wherein the target site of the TMEM101 gene is at least one CpG site in an upstream and downstream 2000bp interval of a transcription start site of the TMEM101 gene; the reference gene is one or more of GAPDH and beta-actin; and the kit comprises a PCR pre-amplification reaction system and a PCR amplification reaction system. According to the provided detection kit for TMEM101 gene methylation in human peripheral blood circulating tumor DNA for early screening of endometrial cancer, the technical defects that in the prior art, the process is tedious, the detection time is long, the false positive is high, and the early screening of the endometrial cancer blood cannot be traced are overcome.

The invention provides a single-cell ATAC-seq data analysis method. The single-cell ATAC-seq data analysis method comprises the following steps: S1, performing data analysis and quality control on sequencing original data; S2, performing comparative analysis; S3, analyzing an insertion fragment; S4, carrying out Peak analysis on the enrichment region; S5, classifying the single-cell subgroups; S6,carrying out annotation and enrichment on the Peak related genes; S7, carrying out TF-motif analysis; S8, carrying out the subgroup accessibility difference analysis; S9, analyzing related genes of the difference accessibility sites, and annotating genes corresponding to the transcription start sites closest to the peak region where the identified difference TF-motif is located, and the like. According to the method, a comprehensive single-cell ATAC-seq data analysis process with rich analysis contents is constructed; the analysis result reveals a large amount of biological information, people can deeply excavate biological phenomena and characteristics contained in the single-cell level conveniently, the analysis process and result are visually displayed in the form of html, the analysiscontent is clear in hierarchy, the result display forms are diversified, and the readability of the report is improved.

The present invention relates to a method for preparing thaxtomin A, thaxtomin B or thaxtomin D by heterologous expression of a thaxtomin biosynthetic gene cluster. In a preferred embodiment, a synthetic biology strategy is further applied to redesign a thaxtomin biosynthetic approach by using gene cluster editing technology, a constitutive strong promoter element is inserted in upstream of a transcription start site of the txtAB, txtED and/or txtC operons in the gene cluster, so that the yield of thaxtomin is increased.

A corn drought-inducible promoter and activity analysis belong to the technical field of bioengineering. The invention provides an obtained corn drought-inducible promoter sequence, a drought-inducible plant expression vector for corn transformation and genetically modified plants transformed by plant expression vector; the corn drought-inducible promoter sequence contains a DNA (deoxyribonucleic acid) nucleotide sequence from the -1bp region to the -1444bp region relative to the transcription start site of SEQ ID NO: 1; the drought-inducible plant expression vector contains the corn drought-inducible promoter sequence and a 5' untranslated region of a corn drought-responding protein gene; the genetically modified plants transformed by the plant expression vector contain the corn drought-inducible promoter sequence and the 5' untranslated region of the corn drought-responding protein gene; and PCR (polymerase chain reaction) primers of SEQ ID NO: 2 and SEQ ID NO: 3 are suitable for amplifying the sequence DNA segment containing the SEQ ID NO: 1. The corn drought-inducible promoter can be used for promoting the high-efficiency expression of drought-resistant genes and in drought-resistant genetically modified plants, and has a positive significance in solving the problem in grain production in arid regions and increasing grain yield.

The invention belongs to the technical field of biological gene engineering and discloses a promoter sequence of a fructokinase gene in an apple, and deletion mutants and application of. A promoter isnamed as FH1 and is a 1780-bp nucleotide sequence at the upper stream of the 5'-end of an MdFRK2 gene coding frame in an apple; and the mutants are sequences obtained by deleting fragments with different lengths from the 5'-end of the sequence of FH1 and are named as FH2, FH3 and FH4 respectively. The invention further discloses application of the MdFRK2 promoter and the deletion mutants of the MdFRK2 promoter in research on plant functional genes. The MdFRK2 promoter can regulate and control the specific expression of a target gene in cambium of stem tip growth points, old leaves, functionalleaf margins and other library tissues of arabidopsis thaliana and poplar, and a fragment from a transcription starting site to upstream-600 bp is determined to be a core fragment of a promoter region of the MdFRK2 promoter. The full length of the MdFRK2 promoter is induced by exogenous sugar and drought, which indicates that the promoter has important application value in industrial developmentof plant genetic engineering.

The present invention belongs to the field of biotechnology, and in particular relates to a kit, a method and primers for analyzing methylation status of an MLH1 promoter in a DNA sample. The invention provides a kit for analyzing the methylation status of a neoplastic disease associated MLH1 promoter in a DNA sample. The kit comprises oligonucleotide primers, the oligonucleotide primers are complementary with at least part of the sequence of the MLH1 promoter in a zone from -248bp to -178bp relative to a transcription start site and overlap with the methylation sites in the zone. The present invention discloses accurate and sensitive test, composition and method for detection of differential methylation of genomic MLH1 promoter DNA in clinical sample. The test, composition and method can be used in allow diagnosis and symptom method; and the applicable characteristic is that the presenting level of methylation genomic MLH1 promoter DNA in the absence of a specific disorder is distinguished from illness of methylation genomic MLH1 promoter DNA level.

The invention which belongs to the technical field of biological engineering provides a Zea mays adverse stress inducible promoter sequence. The adverse stress inducible promoter sequence is characterized in that: the promoter sequence comprises DNA nucleotide sequences relative to a zone from -1bp to -1150bp at the transcription start site of SEQ ID NO: 1. The invention also provides an adverse stress inducible plant expression vector for Zea mays transformation. The plant expression vector comprises the Zea mays adverse stress inducible promoter and a 5' untranslated region of ZmapH (Zea mays anionic peroxidase H); and PCR primers of SEQ ID NO:2 and SEQ ID NO:3 are suitable for the amplification of DNA segments containing the SEQ ID NO:1. The Zea mays adverse stress inducible promoter can be used to promote adverse stress resistant gene to efficiently express, and has a positive meaning to the research of the transgenic technology of the Zea mays stress tolerant species and the cultivation of the strong comprehensive resistance high quality high yield new transgenic species.

The invention belongs to the fields of molecular biology and cytobiology, and specifically relates to a design and an application for a lentiviral expression vector. According to the vector designed by the invention, a CMV enhancer and a CMV promoter are used as transcription starting elements of an insertion gene; an EF1a-core promoter is adopted as a transcription starting element for screeningand marking puromycin and green fluorescent protein (GFP), and a puromycin resistance gene and a GFP sequence are connected and expressed in series through T2A; a lentiviral vector is adopted as a vector skeleton, and two above-mentioned elements are inserted into the skeleton vector; thus, the lentiviral expression vector is obtained by reasonable design and optimization. By adoption of the lentiviral vector designed by the invention, the inserted gene can be efficiently expressed, and the expression efficiency of the lentiviral expression vector is superior to the expression efficiency of conventional vectors with the same type of characteristics.

A corn stress-inducible promoter and activity analysis belong to the technical field of bioengineering. The invention provides an obtained corn stress-inducible promoter sequence, a stress-inducible plant expression vector for corn transformation and genetically modified plants transformed by plant expression vector; the corn stress-inducible promoter sequence contains a DNA (deoxyribonucleic acid) nucleotide sequence from the -1bp region to the -1299bp region relative to the transcription start site of SEQ ID NO: 1; the stress-inducible expression vector contains the corn stress-inducible promoter sequence and a 5' untranslated region of a corn DRE-binding protein gene; the genetically modified plants transformed by the plant expression vector contain the corn stress-inducible promoter sequence and the 5' untranslated region of the corn DRE-binding protein gene; and PCR (polymerase chain reaction) primers of SEQ ID NO: 2 and SEQ ID NO: 3 are suitable for amplifying the sequence DNA segment containing the SEQ ID NO: 1. The corn stress-inducible promoter can be used for promoting the high-efficiency expression of drought-resistant genes and in drought-resistant genetically modifiedplants, and has a positive significance in solving grain crisis in arid regions and increasing grain yield.

The invention relates to a method for knocking in a terminator to achieve efficient knockout of a transcription factor (including protein editing genes, non-encoding genes, and the like) by using a gene editing technology. Specifically, DNA (deoxyribonucleic acid) break is caused behind a transcription start site (TSS) of a gene to be knocked out by using a gene editing technology, meanwhile, a DNA donor with a transcription termination sequence (terminator) is introduced into cells, the doner does not comprise a target gene homologous sequence, the DNA donor is also linearized by using the gene editing technology, then after the terminator is knocked into a TSS of a target gene through a non-homologous repairing way, endogenous transcription of the target gene is terminated ahead of time,and thus knockout of the target gene is achieved. The method is wide in application scope, and all transcription facts can be knocked out by the method. The doner DNA has universality, has high efficiency, and in addition, has resistance genes, and the method is high in efficiency and has certain practical value.

An expression control sequence which controls expression of a target gene linked downstream of the expression control sequence depending on an intracellular concentration of an amino acid, wherein in a bacterial cell which harbors a DNA construct comprising the expression control sequence, a promoter linked upstream of the expression control sequence and the target gene linked downstream of the expression control sequence, frequency of termination in the expression control sequence, of transcription starting from the promoter is lowered by increase of an intracellular concentration of an amino acid, whereby expression of the target gene increases.

The invention relates to a low-temperature drought induced promoter of zeamays and activity analysis, and belongs to the technical field of biological engineering. The invention provides a low-temperature drought induced promoter sequence of the zeamays. The sequence comprises a deoxyribonucleic acid (DNA) nucleotide sequence relative to a -1 bp to -1,645 base pair (bp) region of the transcription starting point of SEQ ID No:1; a low-temperature drought induced plant expression vector for zeamays conversion is provided simultaneously, and comprises the low-temperature drought induced promotersequence of the zeamays and a 5' untranslated region of zeamays zinc finger protein (ZmZFP) gene; a transgenic zeamays mature embryo converted by the plant expression vector is provided; and polymerase chain reaction (PCR) primers of SEQ ID No: 2 and SEQ ID No: 3 are suitable for amplifying DNA fragments containing the sequence of SEQ ID No: 1. The low-temperature drought induced promoter can be used for promoting the high-efficiency expression of the low-temperature drought gene and is applied in drought transgenic plant which are not resistant to low temperature, so that the plants have thecharacters of low temperature and drought, and thus, the low-temperature drought induced promoter has a positive significance for solving the problem of food crisis in low-temperature and drought areas.

The invention discloses Gossypium barbadense transmembrane protein gene, primers, and application of the Gossypium barbadense transmembrane protein gene; the gene is composed of 2315 bases; a transcription start point is started from the base 1 of 5' end, and a transcription end point resides at the base 2289; the gene is a brand-new gene capable of imparting verticillium wilt resistance to plants, disease-resistant gene resources can be enriched, and a new effective tool is provided for breeding of anti-verticillium wilt species of cotton; one pair of molecular markers provided herein are interlinked to the transmembrane protein gene GbTMEM214; by using the molecular markers, it is possible to increase the efficiency and speed of transfer of Gossypium barbadense GbTMEM214 gene to upland cotton, and to quicken the anti-disease breeding process of cotton.

The invention discloses a method of predicting gestational related diseases based on pregnant woman peripheral blood free DNA high-throughput sequencing. A research discovers that the distribution condition of the pregnant woman peripheral blood free DNA in a gene transcription starting site region can reflect the physiological states of the pregnant woman and the fetus; the serum free DNA abundance based on the gene transcription starting site area has significant difference between a patient with a gestational related disease and a healthy pregnant woman, and can effectively predict the onset of the gestational related disease. A gestational related disease screening prediction model based on peripheral blood free DNA detection is constructed; the method can predict the onset of the gestational related disease before the clinical symptoms of the gestational related diseases occur, is a non-invasive, economical, convenient and accurate method for early prediction of the gestational related diseases, and has a good application prospect in development of prediction and screening products for the gestational related diseases.

The invention discloses a detection method for capturing a cfDNA5mC fragment. The detection method comprises the following steps: step 1, preparing reagents; step 2, preparing Inculation Mix, and operating at the temperature of 4 DEG C; step 3, diluting an Antibody at 1: 15, placing the antibody at -80 DEG C, adding 0.5 [mu] l of the antibody and 7.5 [mu] l of H2O (excess), and timely placing the antibody at-80 DEG C after the antibody is used up; step 4, preparation of Antibody Mix: the Antibody Mix is excessive, and three amounts of Antibody Mix are generally prepared for two samples; step 5, mixing an Inculation Mix and the Antibody Mix, rotating at the rotating speed of 40 at the temperature of 4 DEG C, and incubating overnight for 17 hours; and step 6, preparing an Ipre Kit v2 reagent. According to the detection method for capturing the cfDNA5mC fragment, methylation of fifth carbon of cytosine (5-methylcytosine: 5mC) is a methylation type excavated in eukaryotes at the earliest, in gene expression, a transcription start site region is generally non-methylated, and when the gene is expressed at a lower level, the methylation level of cytosine in a regulation region is higher, and library correlation generated by different initial quantities and different methods is an effective parameter for evaluating consistency and high performance.

The invention discloses a target gene combination related to gestational age and application thereof. Based on the target gene combination, the target gene combination comprises TSPOAP1, CRYAA, CXCL11, FNDC10, HMGA2, FDCSP, OLFM2, KRT36, C13orf46, SCD5, OR12D2, OMP, CEBPE, MOBP, CCNF, FUT2, LIPH, ERICH4, GPR171 and the like. According to the method, the distribution condition of peripheral blood free DNA in some gene transcription start site areas can reflect different gestational weeks, and after the characteristics of the free DNA transcription start site areas are subjected to homogenization correction, a prediction model constructed by using a machine learning algorithm can effectively predict the fetal age of a fetus.

Disclosed are a systemic lupus erythematosus (SLE) biomarker and diagnostic kit thereof. The SLE biomarker is a segment within 1500 bp upstream from a transcription start site of a human IFI44L gene, namely chr1: 79,085,190-79,085,311 (hg19), and a DNA sequence thereof is represented by SEQ ID NO.1. The SLE diagnostic kit in the present invention comprises primers having sequences represented by SEQ ID NO.2 and SEQ ID NO.3, and a probe having a sequence represented by SEQ ID NO.4.

The invention discloses a corn low-temperature inducible promoter and activity analysis, belonging to the technical field of bioengineering, and provides an obtained corn low-temperature inducible promoter sequence, which comprises a DNA (Deoxyribonucleic Acid) nucleotide sequence ranging from a -1bp region to a -1151bp region relative to a transcription start site of SEQ ID NO:1. The invention further provides a low-temperature inducible plant expression vector for transforming corn, which comprises a corn low-temperature inducible promoter sequence and a 5' non-translational region of a corn dehydration-responsive element (DRE) binding protein gene ZmDBP3, as well as a genetically-modified corn mature embryo transformed by the plant expression vector. PCR primers shown as SEQ ID NO:2 and SEQ ID NO:3 are suitable for amplifying DNA fragments, including the sequence SEQ ID NO:1. The corn low-temperature inducible promoter can be used for starting efficient expression of a low-temperature-resistant gene, can be applied to low-temperature-intolerant plants to realize the low-temperature resistance of plants, and plays a positive role in solving the problem of food crisis in low-temperature areas.