Depixus

Sorbonne Université

Centre National De La Recherche Scientifique

Université Paris Diderot-Paris 7

Paris Sciences Et Lettres-quartier Latin

Centre National De La Recherche Scientifique-cnrs

Universite Paris Cité

Paris Sciences Et Lettres

Depixus Sas

Jimmy Ouellet

Vincent Croquette

Jerome Maluenda

David Bensimon

Jean-François Allemand

Charles Andre

Gordon Hamilton

Zhen Wang

Jerôme Maluenda

Henning Labuhn

Jérôme Maluenda

The invention proposes a device for analyzing nucleic acid molecules (M), comprising: —a bead (), on which one molecule can be anchored at one end, —a surface (), on which the molecule can be anchored at the other end, —an actuator (), adapted to cause the bead to move relative to said surface in one direction, —a sensor (), adapted to measure a distance between the bead and the surface, the device further comprising a well (), having an axis (X-X) extending along the direction of motion of the bead and a bottom () formed by said surface, said well being filled with electrically conductive solution (), and receiving the bead, the sensor being adapted to measure an impedance of the well, depending on a distance between the bead and the surface, to determine, the distance between the bead and the surface.

Device for the analysis of nucleic acid molecules

The present invention relates to a method of preparing a nucleic acid molecule comprising a target region for isolation from a sample, said method comprising the steps of contacting a population of nucleic acid molecules with a first Class 2 Type V Cas protein-gRNA complex, wherein the gRNA comprises a guide segment that is complementary to a first sequence within a nucleic acid molecule, said first sequence being located adjacent to said target region, thereby forming a Class 2 Type V Cas protein-gRNA-nucleic acid complex, and a protector molecule, contacting the population of nucleic acid molecules with at least one enzyme having exonuclease activity, recovering said nucleic acid molecule comprising the target region from the Class 2 Type V Cas protein-gRNA-nucleic acid complex formed in step a), and contacting the nucleic acid molecule of step c) with a processive polymerase, preferably a mesophilic or thermophilic polymerase, even more preferably a T4 DNA polymerase.

Optimization of in vitro isolation of nucleic acids using site-specific nucleases

The present invention relates to a method of isolating a nucleic acid target region from a population of nucleic acid molecules, said method comprising the steps of a) contacting said population of nucleic acid molecules with a Class 2 Type V Cas protein-gRNA complex, wherein the gRNA comprises a guide segment that is complementary to a first site adjacent to said target region, thereby forming a Class 2 Type V Cas protein-gRNA-nucleic acid complex, b) contacting the population of nucleic acid molecules comprising said Class 2 Type V Cas protein-gRNA-nucleic acid complex with at least one enzyme having single-strand 3' to 5′ exonuclease activity, thereby forming a 5′ single-stranded overhang in said first site, c) removing the Class 2 Type V Cas protein-gRNA complex from the population of step b), d) contacting the population of step c) with an oligonucleotide probe, said probe comprising a sequence that is at least partially complementary to said overhang, thereby forming a duplex between said probe and said overhang, and e) isolating said duplex from the population of nucleic acid molecules of step d), thereby isolating said nucleic acid target region.

Method of nucleic acid enrichment using site-specific nucleases followed by capture

Disclosed herein are methods of screening candidate binding compounds to a plurality of target nucleic acids either of the same sequence or of different sequences utilizing a device configured to detect changes in the folding and unfolding force of the target nucleic acid upon binding to various candidate binding compounds. In the presence of a plurality of nucleic acid sequences, the methods described herein also can rapidly determine the specificity of the small molecule or polypeptide to a nucleic acid structure. Also, disclosed herein are methods of measuring binding kinetics of binding compounds to a target nucleic acid using a device configured to detect changes in the folding and unfolding force of the target nucleic acid upon binding to varying concentrations of the candidate binding compound.

Methods of screening compounds

The present invention relates to a method of isolating a nucleic acid target region from a population of nucleic acid molecules, said method comprising the steps of a) contacting said population of nucleic acid molecules with a Class 2 Type V Cas protein-gRNA complex, wherein the gRNA comprises a guide segment that is complementary to a first site adjacent to said target region, thereby forming a Class 2 Type V Cas protein-gRNA-nucleic acid complex, b) contacting the population of nucleic acid molecules comprising said Class 2 Type V Cas protein-gRNA-nucleic acid complex with at least one enzyme having single-strand 3' to 5&#x2032; exonuclease activity, thereby forming a 5&#x2032; single-stranded overhang in said first site, c) removing the Class 2 Type V Cas protein-gRNA complex from the population of step b), d) contacting the population of step c) with an oligonucleotide probe, said probe comprising a sequence that is at least partially complementary to said overhang, thereby forming a duplex between said probe and said overhang, and e) isolating said duplex from the population of nucleic acid molecules of step d), thereby isolating said nucleic acid target region.

The present invention relates to a method for the isolation of a target nucleic acid region. In particular, said method comprises the steps of contacting a population of nucleic acid molecules with at least one Type II Cas protein-gRNA complex, wherein said gRNA comprises a guide segment that is complementary to the sequence comprised in the target region of at least one nucleic acid molecule, thereby forming a Type II Cas protein-gRNA-nucleic acid complex, contacting the population of nucleic acid molecules with at least one enzyme having exonuclease activity, and isolating the target nucleic acid region from the Type II Cas protein-gRNA-nucleic acid complex.

In vitro isolation and enrichment of nucleic acids using site-specific nucleases

The invention proposes a device for analyzing nucleic acid molecules (M), comprising: &#x2014;a bead (), on which one molecule can be anchored at one end, &#x2014;a surface (), on which the molecule can be anchored at the other end, &#x2014;an actuator (), adapted to cause the bead to move relative to said surface in one direction, &#x2014;a sensor (), adapted to measure a distance between the bead and the surface, the device further comprising a well (), having an axis (X-X) extending along the direction of motion of the bead and a bottom () formed by said surface, said well being filled with electrically conductive solution (), and receiving the bead, the sensor being adapted to measure an impedance of the well, depending on a distance between the bead and the surface, to determine, the distance between the bead and the surface.

The present invention relates to a method of preparation of substrates for nucleic acid sequencing reactions. More specifically, the present invention provides a new method of preparing hairpins using force-induced strand invasion. Hairpins prepared by this method and methods of nucleic acid analysis using these hairpins are also part of the present invention.

Growing community of inventors

Lardy, France

Jimmy Ouellet