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Charpentier M, Khedher AHY, Menoret S, Brion A, Lamribet K, Dardillac E, Boix C, Perrouault L, Tesson L, Geny S, De Cian A, Itier JM, Anegon I, Lopez B, Giovannangeli C, Concordet JP. CtIP fusion to Cas9 enhances transgene integration by homology-dependent repair. Nat Commun 2018; 9:1133. [PMID: 29556040 PMCID: PMC5859065 DOI: 10.1038/s41467-018-03475-7] [Citation(s) in RCA: 133] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 02/16/2018] [Indexed: 12/18/2022] Open
Abstract
In genome editing with CRISPR-Cas9, transgene integration often remains challenging. Here, we present an approach for increasing the efficiency of transgene integration by homology-dependent repair (HDR). CtIP, a key protein in early steps of homologous recombination, is fused to Cas9 and stimulates transgene integration by HDR at the human AAVS1 safe harbor locus. A minimal N-terminal fragment of CtIP, designated HE for HDR enhancer, is sufficient to stimulate HDR and this depends on CDK phosphorylation sites and the multimerization domain essential for CtIP activity in homologous recombination. HDR stimulation by Cas9-HE, however, depends on the guide RNA used, a limitation that may be overcome by testing multiple guides to the locus of interest. The Cas9-HE fusion is simple to use and allows obtaining twofold or more efficient transgene integration than that with Cas9 in several experimental systems, including human cell lines, iPS cells, and rat zygotes.
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Affiliation(s)
- M Charpentier
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - A H Y Khedher
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
- Translational Sciences, Sanofi, 13 Quai Jules Guesde, F-94400, Vitry-sur-Seine, France
| | - S Menoret
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, CHU de Nantes, 30 Avenue Jean Monnet, F-44093, Nantes, France
| | - A Brion
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - K Lamribet
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - E Dardillac
- Equipe Labellisée Ligue Contre le Cancer, Institut de Cancérologie Gustave-Roussy, Université Paris-Saclay, CNRS UMR 8200, 114 rue Edouard Vaillant, Villejuif, F-94805, France
| | - C Boix
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - L Perrouault
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - L Tesson
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, CHU de Nantes, 30 Avenue Jean Monnet, F-44093, Nantes, France
| | - S Geny
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - A De Cian
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - J M Itier
- Translational Sciences, Sanofi, 13 Quai Jules Guesde, F-94400, Vitry-sur-Seine, France
| | - I Anegon
- Centre de Recherche en Transplantation et Immunologie UMR1064, INSERM, Université de Nantes, CHU de Nantes, 30 Avenue Jean Monnet, F-44093, Nantes, France
| | - B Lopez
- Equipe Labellisée Ligue Contre le Cancer, Institut de Cancérologie Gustave-Roussy, Université Paris-Saclay, CNRS UMR 8200, 114 rue Edouard Vaillant, Villejuif, F-94805, France
| | - C Giovannangeli
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France
| | - J P Concordet
- Museum National d'Histoire Naturelle, INSERM U1154, CNRS UMR 7196, Sorbonne Universités, 43 rue Cuvier, Paris, F-75231, France.
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Monchaud D, Allain C, Bertrand H, Smargiasso N, Rosu F, Gabelica V, De Cian A, Mergny JL, Teulade-Fichou MP. Ligands playing musical chairs with G-quadruplex DNA: a rapid and simple displacement assay for identifying selective G-quadruplex binders. Biochimie 2008; 90:1207-23. [PMID: 18343231 DOI: 10.1016/j.biochi.2008.02.019] [Citation(s) in RCA: 214] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Accepted: 02/19/2008] [Indexed: 01/19/2023]
Abstract
We report here the details of G4-FID (G-quadruplex fluorescent intercalator displacement), a simple method aiming at evaluating quadruplex-DNA binding affinity and quadruplex- over duplex-DNA selectivity of putative ligands. This assay is based on the loss of fluorescence upon displacement of thiazole orange from quadruplex- and duplex-DNA matrices. The original protocol was tested using various quadruplex- and duplex-DNA targets, and with a wide panel of G-quadruplex ligands belonging to different families (i.e. from quinacridines to metallo-organic ligands) likely to display various binding modes. The reliability of the assay is further supported by comparisons with FRET-melting and ESI-MS assays.
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Affiliation(s)
- D Monchaud
- Institut Curie, Section Recherche, CNRS UMR176, Centre Universitaire Paris XI, Bat. 110, 91405 Orsay, France
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Abstract
A [2]catenane and a [2]rotaxane have been prepared from a C2-symmetric, 2,9-diphenyl-1,10-phenanthroline-based (dpp-based) macrocycle incorporating a 1,5-dioxynaphthalene subunit by means of the transition metal templated technique. In the case of the catenane, this macrocycle is interlocked with a dpp-based macrocycle that is oriented through the location of a p-tolyl substituent in the 4-position of the phenanthroline subunit. In the case of the rotaxane, the C2-symmetric macrocycle is threaded onto an oriented, dumbbell-shaped molecule, based on the same 4-p-tolyl-1,10-phenanthroline subunit, which bears tetraarylmethane stoppers. Both species are chemically achiral molecules, yet they are composed entirely of asymmetric, mirror-image conformations. Conformational enantiomerization processes therefore take place exclusively by chiral pathways, conferring on these molecules the "rubber glove" property. However, while the molecular graph (constitutional formula) of the [2]rotaxane can be deformed into a planar and, hence, rigidly achiral representation, a feature shared by a few other compounds in the literature that have been characterized as "Euclidean rubber gloves", the molecular graph of the [2]catenane cannot be deformed in this way. It therefore has the unique property of being a chemically achiral "topological rubber glove".
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Affiliation(s)
- J C Chambron
- Laboratoire de Chimie Organo-Minérale, UMR 7513 du CNRS, Université Louis Pasteur, Institut Le Bel, Strasbourg, France.
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Schirlin D, Ducep JB, Baltzer S, Bey P, Piriou F, Wagner J, Hornsperger JM, Heydt JG, Jung MJ, Danzin C, Weiss R, Fischer J, Mitschler A, De Cian A. Synthesis and inhibitory properties of α(chlorofluoromethyl)-α-amino acids, a novel class of irreversible inactivators of decarboxylases. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920001053] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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