2540 results about "Single-nucleotide polymorphism" patented technology

The claimed invention provides for new sample preparation methods enabling direct sequencing of PCR products using pyrophosphate sequencing techniques. The PCR products may be specific regions of a genome. The techniques provided in this disclosure allows for SNP (single nucleotide polymorphism) detection, classification, and assessment of individual allelic polymorphisms in one individual or a population of individuals. The results may be used for diagnostic and treatment of patients as well as assessment of viral and bacterial population identification.

The invention provides methods and kits for ordering sequence information derived from one or more target polynucleotides. In one aspect, one or more tiers or levels of fragmentation and aliquoting are generated, after which sequence information is obtained from fragments in a final level or tier. Each fragment in such final tier is from a particular aliquot, which, in turn, is from a particular aliquot of a prior tier, and so on. For every fragment of an aliquot in the final tier, the aliquots from which it was derived at every prior tier is known, or can be discerned. Thus, identical sequences from overlapping fragments from different aliquots can be distinguished and grouped as being derived from the same or different fragments from prior tiers. When the fragments in the final tier are sequenced, overlapping sequence regions of fragments in different aliquots are used to register the fragments so that non-overlapping regions are ordered. In one aspect, this process is carried out in a hierarchical fashion until the one or more target polynucleotides are characterized, e.g. by their nucleic acid sequences, or by an ordering of sequence segments, or by an ordering of single nucleotide polymorphisms (SNPs), or the like.

The present invention is directed to methods and compositions for the use of microsphere arrays to detect and quantify a number of nucleic acid reactions. The invention finds use in genotyping, i.e. the determination of the sequence of nucleic acids, particularly alterations such as nucleotide substitutions (mismatches) and single nucleotide polymorphisms (SNPs). Similarly, the invention finds use in the detection and quantification of a nucleic acid target using a variety of amplification techniques, including both signal amplification and target amplification. The methods and compositions of the invention can be used in nucleic acid sequencing reactions as well. All applications can include the use of adapter sequences to allow for universal arrays.

The present invention provides assays systems and methods for detection of genetic variants in a sample, including copy number variation and single nucleotide polymorphisms. The invention preferably employs the technique of tandem ligation, i.e. the ligation of two or more fixed sequence oligonucleotides and one or more bridging oligonucleotides complementary to a region between the fixed sequence oligonucleotides.

Methods for determining genotypes and haplotypes of genes are described. Also described are single nucleotide polymorphisms and haplotypes in the ApoE gene and methods of using that information.

Methods and compositions are provided for determining large numbers of single nucleotide polymorphisms in target DNA employing particles having (1) primers complementary to sequences in the target DNA where the next succeeding 3'-nucleotide is a potential single nucleotide polymorphism and coding composition members, where the members are unique for each primer, and (2) differentially labeled terminating nucleotides, where the label permits separation of the terminating nucleotides. Desirably the particles are separated into groups having a common prevalent next succeeding nucleotide. The particles and target DNA are combined under nucleotide extending conditions, the particles separated into groups in accordance with the terminating nucleotide and the coding members identified, so that one knows the sequence and the single nucleotide polymorphism. Various protocols are provided for the determination.</PTEXT>

Processes are disclosed using the depolymerization of a nucleic acid hybrid and incorporation of a suitable nucleotide to qualitatively and quantitatively analyze for the presence of predetermined nucleic acid target sequences. Applications of those processes include the detection of single nucleotide polymorphisms, identification of single base changes, genotyping, medical marker diagnostics, mirosequencing, and.

Methods and compositions are provided for detecting single nucleotide polymorphisms using a pair of oligonucleotides, a primer and a snp detection sequence, where the snp detection sequence hybridizes to the target DNA downstream from the primer and in the direction of primer extension. The snp detection sequence is characterized by having a nucleotide complementary to the snp and adjacent nucleotide complementary to adjacent nucleotides in the target and an electophoretic tag bonded to the 5'-nucleotide. The pair of oligonucleotides is combined with the target DNA under primer extension conditions, where the polymerase has 5'-3' exonuclease activity. When the snp is present, the electophoretic tag is released from the snp detection sequence, and can be detected by electrophoresis as indicative of the presence of the snp in the target DNA.

A candidate single nucleotide polymorphism (SNP) combination is selected from a plurality of candidate SNP combinations for a gene associated with a genetic trait. Haplotype data associated with this candidate SNP combination are read for a plurality of individuals and grouped into a positive-responding group and a negative-responding group based on whether a predetermined trait criteria for an individual is met. A statistical analysis on the grouped haplotype data is performed to obtain a statistical measurement. The acts of selecting, reading, grouping, and performing are repeated as necessary to identity the candidate SNP combination having the optimal statistical measurement. In one approach, a directed search based on results of previous statistical analysis of SNP combinations is performed until the optimal statistical measurement is obtained. In addition, the number of SNP combinations selected and analyzed may be reduced based on a simultaneous testing procedure.

The present invention is in the field of plant genetics. More specifically the invention relates to nucleic acid molecules and nucleic acid molecules that contain markers, in particular, single nucleotide polymorphism (SNP) and repetitive element markers. In addition, the present invention provides nucleic acid molecules having regulatory elements or encoding proteins or fragments thereof. The invention also relates to proteins and fragments of proteins so encoded and antibodies capable of binding the proteins. The invention also relates to methods of using the nucleic acid molecules, markers, repetitive elements and fragments of repetitive elements, regulatory elements, proteins and fragments of proteins.

In one aspect, the invention provides a method of screening and, optionally, treatment of an individual suffering from an insulin resistance disorder by screening an individual in need of treatment for an insulin resistance disorder for one or more genetic variations indicating a predisposition to a response to an insulin sensitizer; and, optionally, administering or not administering an insulin sensitizer to the individual based on the results of the screening. The insulin sensitizer for which the individual is screened and the insulin sensitizer that is administered or not administered may be the same or different. In another aspect, the invention provides methods comprising identifying one or more genetic variations, e.g., one or more single nucleotide polymorphisms, that at least partly differentiate between a subset of a plurality of individuals who experience a response when administered an insulin sensitizer, and a subset of said plurality of individuals who do not experience a response when administered the insulin sensitizer. The invention also provides nucleic acids, polypeptides, antibodies, kits, and business methods associated with these screening and association methods.

Methods and compositions are provided for detecting target molecules, e.g. DNA sequences, particularly single nucleotide polymorphisms, using a pair of nucleotide sequences, a primer and a snp detection sequence, where the snp detection sequence binds downstream from the primer to the target DNA in the direction of primer extension, or ligands and receptors. The methods employ e-tags comprising a mobility-identifying region joined to a detectable label and a target-binding region. The result of the binding of the target-binding region to the target is to have a bond cleaved in the starting material with the production of a detectable product with a different mobility from the starting material, where the different e-tags can be separated and detected.

A novel phasing algorithm harnesses sequencing read information from next generation sequencing technologies to guide and improve local haplotype reconstruction from genotypes. Techniques include determining correlated occurrences of single nucleotide polymorphisms (SNPs) in genes of a population of individuals. A plurality of sequences of nucleotide bases in one or more individuals from the populations of individuals is determined based on ultra-high throughput sequencing of a sample from the one or more individuals. Haplotypes included in the population of individuals are determined based on both the correlated occurrences and the plurality of sequences. The inclusion of paired end read data is especially advantageous for the phasing of rare variants, including singletons.

The present invention is directed to methods and compositions for the use of microsphere arrays to detect and quantify a number of nucleic acid reactions. The invention finds use in genotyping, i.e. the determination of the sequence of nucleic acids, particularly alterations such as nucleotide substitutions (mismatches) and single nucleotide polymorphisms (SNPs). Similarly, the invention finds use in the detection and quantification of a nucleic acid target using a variety of amplification techniques, including both signal amplification and target amplification. The methods and compositions of the invention can be used in nucleic acid sequencing reactions as well. All applications can include the use of adapter sequences to allow for universal arrays.

The invention is applicable to the field of biological engineering and provides a method for detecting mononucleotide polymorphism. The method comprises the following steps: sequencing fragments obtained by high throughput sequencing technology are compared on a referenced genome sequence; the likelihood ratio of various genotypes of the corresponding sites on the genome to be tested is obtained according to the sequencing mass fraction of each basic group in the genome to be tested and obtained by sequencing; the posterior probability of each genotype of each site on the referenced genome is calculated according to the likelihood ratio and the prior probability preset for each genotype, and the genotype which has the highest posterior probability is determined as the most likely right genotype of the corresponding sites on the genome to be tested to obtain the consistent sequence of the genome to be tested; and the sites of the genome to be tested, which are inconsistent with the sequence of the referenced genome in the consistent sequence are detected to obtain the polymorphism sites of the genome to be tested. The embodiment of the invention can achieve a more accurate test result as the influence of the prior probability on mononucleotide polymorphism test result is considered in advance.

There is provided a resonator sensor useful for detecting polymorphisms and mutations in DNA. The resonator sensor has a capture molecule immobilised on its surface, the capture molecule being either a probe DNA containing a reference sequence, or a mismatch binding molecule, and being capable of forming a probe DNA/target DNA/mismatch binding molecule complex on the surface of the resonator. A method for detecting mutations in a target DNA, including single nucleotide polymorphisms, is also provided.

The invention relates to the role of genes in human diseases. More particularly, the invention relates to compositions and methods for identifying genes that are involved in human disease conditions. The invention provides identification and mapping of a very large number of SNPs throughout the entire human genome. This contribution allows scientists to isolate and identify genes that are relevant to the prevention, causation, or treatment of human disease conditions.

The invention provides a Proton-based transcriptome sequencing data comparison and analysis method and system. The method comprises the following steps: acquiring original sequencing data of at least two transcriptomes of a certain species by virtue of a Proton sequencing platform; filtering unqualified data to obtain clean reads; performing first-step analysis and second-step analysis, wherein the first-step analysis comprises the steps of comparing the clean reads with a reference genome of the species respectively, performing transcript quantitative analysis, screening significantly differently expressed genes and performing significantly differently expressed gene function analysis; the second-step analysis comprises the steps of comparing the clean reads to the reference genome of the species respectively, performing alternative splicing analysis, performing gene structure optimization analysis, performing new transcript prediction, performing SNP (Single Nucleotide Polymorphism) analysis and performing gene fusion detection. According to the method and the system, the transcriptome sequencing data comparison and analysis accuracy and reliability can be improved.