180 results about "Nanopore sequencing" patented technology

The invention relates to devices and methods for nanopore sequencing. The invention includes arrays of nanopores having incorporated electronic circuits, for example, in CMOS. In some cases, the arrays of nanopores comprise resistive openings for isolating the electronic signals for improved sequencing. Methods for controlling translocation of through the nanopore are disclosed.

A method of employing a nanopore structure in a manner that allows the detection of the positions (relative and/or absolute) of nucleic acid probes that are hybridized onto a single-stranded nucleic acid molecule. In accordance with the method the strand of interest is hybridized with a probe having a known sequence. The strand and hybridized probes are translocated through a nanopore. The fluctuations in current measured across the nanopore will vary as a function of time corresponding to the passing of a probe attachment point along the strand. These fluctuations in current are then used to determine the attachment positions of the probes along the strand of interest. This probe position data is then fed into a computer algorithm that returns the sequence of the strand of interest.

The invention relates to devices and methods for nanopore sequencing. The invention includes compositions and methods of nucleic acid sequencing using a single polymerase enzyme complex comprising a polymerase enzyme and a template nucleic acid attached proximal to a nanopore, and nucleotide analogs in solution comprising charge blockade label that are attached to the polyphosphate portion of the nucleotide analog such that the charge blockade labels are cleaved when the nucleotide analog is incorporated into a growing nucleic acid and the charge blockade label is detected by the nanopore to determine the presence and identity of the incorporated nucleotide and thereby determine the sequence of a template nucleic acid.

Methods, compositions, and systems are provided for characterization of modified nucleic acids. Nanopore sequencing is performed using a processive enzyme to control the rate of translation of a single strand of a nucleic acid through a nanopore. The presence and identity of a modified base can be determined by monitoring the kinetics of translation through the pore even though the events that lead to the kinetic changes are separated in time and space from the translation of the modified base or it's compliment through the nanopore. The invention also comprises the use of hemi-genomic DNA in nanopore sequencing.

The invention relates to devices and methods for nanopore sequencing. The invention includes arrays of nanopores having incorporated electronic circuits, for example, in CMOS. The invention includes devices having sample and reference pores connecting sample, measurement and reference chambers, wherein potential measurements in each chamber is used to provide an accurate determination of current through a sample nanopore, improving nanopore sequencing.

A sequencing method is presented in which a biomolecule is hybridized with a specially chosen pool of different probes of known sequence which can be electrically distinguished. The different probe types are tagged such that they can be distinguished from each other in a Hybridization Assisted Nanopore Sequencing (HANS) detection system, and their relative positions on the biomolecule can be determined as the biomolecule passes through a pore or channel. The methods eliminate, resolve, or greatly reduce ambiguities encountered in previous sequencing methods.

Improved multi-cell nanopore-based sequencing chips and methods can employ formation, characterization, calibration, and/or normalization techniques. For example, various methods may include one or more steps of performing physical checks of cell circuitry, forming and characterizing a lipid layer on the cells, performing a zero point calibration of the cells, forming and characterizing nanopores on the lipid layers of each cell, performing a sequencing operation to accumulate sequencing signals from the cells, normalizing those sequencing signals, and determining bases based on the normalized sequencing signals.

The invention relates to a method for preparing nano-gap electrodes on the surface of a nano-pore and in the nano-pore. The method enables two-dimensional two-channel simultaneous detection of signal changes in a molecular through hole to be realized and accuracy of sequencing of a nano-pore to be improved. The method for preparing a nano-gap electrode on the surface of a nano-pore comprises the following steps: forming a micron-sized metal line on the surface of a substrate, etching the micron-sized metal line into a metal line with line width at a nanometer level, etching a through nano-pore in the substrate at a position corresponding to the nanometer metal line, and cutting the metal line through corrosion so as to directly form a surface nano-gap electrode at the opening of the nano-pore. To improve the invention, a micron-sized metal line is formed on the surface of the substrate and etched until the line width of the metal line is 10 to 50 nm, then etching is carried out on themetal line so as to form opposite electrodes, a through nano-pore is etched in the substrate at a position corresponding to a nano-gap, the metal line is allowed to grow towards the edge of the nano-pore, and therefore, a surface nano-gap electrode is formed at the opening of the nano-pore.

A piezoelectric substrate having a nanopore opening that separates two reservoirs of conductive fluid may provide for sensitive biological measurements by allowing control of the size of the nanopore according to piezoelectric stimulation of the substrate. Multiple embodiments are provided of monolithic piezoelectric substrates and nanopores for this purpose as well as a control system for controlling the nanopore dimensions electrically using AC or DC waveforms.

The invention relates to a method for modifying a template double stranded polynucleotide, especially for characterisation using nanopore sequencing. The method produces from the template a plurality of modified double stranded polynucleotides. These modified polynucleotides can then be characterised.

The present invention provides a method for detecting genomic structure variation based on nanopore sequencing, which includes performing nanopore sequencing data quality control and genomic mapping;excavating within-alignment reads and split reads information; defining structural variation and typing; and performing multi-sample data variation type integration. The method of the invention can detect the variation of mutants and wild-type materials, the variation between extremely resistant materials, transgenic events and the location of inserted fragments; can also organically integrate theresults of a large number of samples and assist in the correction of variation sites; provide rich structural variation data for natural resource groups for subsequent GWAS analysis; not only can detect common large fragment structural variations, but also have high accuracy and precision in the detection of chimeric mutations, and clusters the reads of the typed structural mutations to determinehomozygous and heterozygous structural variations.

The present of disclosure provides variant Pol6 polymerase polypeptide, compositions comprising the Pol6 variant polypeptides, and methods for using the variant Pol6 polypeptides for determining the sequencing of nucleic acids, for example, by nanopore sequencing. The variant Pol6 polymerases possess decreased rates of dissociation of template from the polymerase-template complex, which result n increased processivity relative to the parental Pol6 polypeptides from which they are derived.

The invention discloses a nano-pore sensing device based on two-dimensional layer materials and a configuring method and application thereof.The sensing device comprises a silicon material substrate, a two-dimensional material layer, a nano-pore and biomacromolecules.The two-dimensional material layer is attached to the surface of the silicon material substrate, the nano-pore in the silicon material substrate is communicated with a small hole in the two-dimensional material layer, and the biomacromolecules are anchored to the other end of the nano-pore.Compared with the prior art, the nano-pore sensing device has the advantages that the characteristic of control over the DNA hole passing speed of the biological nano-pore and the advantages of stability, easy design and array processing of the solid nano-pore are combined, the advantage that the space resolution in nano-pore sequencing is broken through through the nano-pore manufactured through the two-dimensional layer materials is adopted, and the nanometer device capable of directly conducting efficient information reading on an analyte is developed so that the requirement for reading DNA encoding information in current medical and future information devices can be met, and the accuracy of nano-pore sequencing is improved.

The present disclosure provides variant Pol6 polymerase polypeptides, compositions comprising the Pol6 variant polypeptides, and methods for using the variant Pol6 polypeptides for determining the sequencing of nucleic acids, for example, by nanopore sequencing. The variant Pol6 polymerases possess decreased rates of dissociation of template from the polymerase-template complex, which result in increased processivity relative to the parental Pol6 polypeptides from which they are derived.

The present invention provides a method for constructing a single-stranded nucleic acid molecule for nucleic acid sequencing by means of a nanopore sequencer, said method including: a step in which at least one hairpin primer including a single-stranded region on the 3′ side and a pair of primers are used to synthesize a complementary strand of template DNA that includes the target sequence; and a step in which the synthesized complementary strand forms a hairpin structure inside a molecule and a template extension reaction is carried out. The obtained nucleic acid molecule includes both the target sequence and the complementary strand thereof in the sequence. Single strand construction enables analysis by nanopore sequencing, and the sequence of only the target nucleic acid, which does not include information of the complementary strand, is repeatedly analyzed, thus enabling analysis to be conducted with greater precision by addressing the problem of sequence errors.

The invention relates to a metagenome sample library construction method and an identification method based on a nanopore sequencing platform and a kit. The method comprises host removal pre-treatmentand sample library construction on human and animal metagenome samples by combining incomplete host removal based on the nanopore sequencing platform so as to sequence and identify the metagenomes. Compared with a conventional process flow, the method is simpler and rapider, meets the reasonable detection demands, omits flows such as library construction PCR in the identifying process, extrudes deviation caused by PCR amplification, and can be used for identifying metagenome microorganisms more truly and accurately.

The invention provides a DNA sequencing device and a manufacturing method. The device mainly comprises a silicon dioxide thin film arranged on a double-side polished monocrystalline silicon piece. A silicon nitride thin film grows on the top of the silicon dioxide thin film. A bottom layer contact electrode is prepared on the silicon nitride thin film and covered with a bottom layer graphene micro-strip. The bottom layer graphene micro-strip is covered with a hexagonal boron nitride micro-strip. The hexagonal boron nitride micro-strip is covered with a top layer graphene micro-strip. A graphene-hexagonal boron nitride-graphene heterostructure is formed by the bottom layer graphene micro-strip, the hexagonal boron nitride micro-strip and the top layer graphene micro-strip. Graphene-hexagonal boron nitride-graphene nano-pores are etched. According to the device, the problem that a conventional solid-state nano-pore channel is too long, so that the sequencing resolution ratio does not reach single base is solved, and the problem that a tunneling electrode is difficult to manufacture in a tunneling current DNA sequencing method is solved. The advantages lay a foundation for achieving single base resolution ratio and direct nano-pore sequencing.

The present invention relates to a method for conversion of a target nucleic acid molecule according to a predetermined nucleotide code into a converted nucleic acid molecule. The converted nucleic acid molecule has utility for determining the nucleotide sequence of the target nucleic acid molecule, for example, using a nanopore.

The invention provides a nanopore three-generation sequencing detection method for plasma virology. The method comprises the following steps: preparation of viral nucleic acid in blood samples and incorporation of standard nucleic acid internal reference, construction of nanopore sequencing library, real-time sequencing of nanopore and conversion of real-time fast file, bioinformatics analysis andthe like. The method not only can rapidly detect virus group of a blood sample, but also can improve coverage rate of a whole genome sequence of virus and achieve a purpose of rapidly detecting the virus of the blood sample.

The invention relates to a method for modifying a template polynucleotide for characterisation, especially for nanopore sequencing. The method produces a modified polynucleotide which is complementary to the template polynucleotide at some positions and which contains universal or abasic nucleotides at the other, and in some instances predicable, positions. The resulting modified polynucleotide can then be characterised.

The invention discloses a specific primer for novel coronary virus detection and a rapid detection method. The method comprises the following steps of inactivating a collected sample, and extracting virus RNA; carrying out inversion on virus RNA which is extracted in the step S1 and qualified through quality testing to perform cDNA synthesis; adopting the specific primer for fragment amplificationto form a PCR reaction product sample; identifying the PCR reaction product sample, and constructing a sequencing library; and carrying out a nanopore sequencing operation on the sequencing library.The method is high in sequencing quality, and when the sample obtained by the method is applied to novel coronary virus genome comparison, reads comparison rate as high as 94.16% can be realized, so that determination of the infection condition of a patient can be assisted, and rapid accurate detection of novel coronary virus can be realized.