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Calbry J, Goudounet G, Charlot F, Guyon-Debast A, Perroud PF, Nogué F. The SpRY Cas9 variant release the PAM sequence constraint for genome editing in the model plant Physcomitrium patens. Transgenic Res 2024; 33:67-74. [PMID: 38573428 PMCID: PMC11021247 DOI: 10.1007/s11248-024-00381-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 03/18/2024] [Indexed: 04/05/2024]
Abstract
Genome editing via CRISPR/Cas has enabled targeted genetic modifications in various species, including plants. The requirement for specific protospacer-adjacent motifs (PAMs) near the target gene, as seen with Cas nucleases like SpCas9, limits its application. PAMless SpCas9 variants, designed with a relaxed PAM requirement, have widened targeting options. However, these so-call PAMless SpCas9 still show variation of editing efficiency depending on the PAM and their efficiency lags behind the native SpCas9. Here we assess the potential of a PAMless SpCas9 variant for genome editing in the model plant Physcomitrium patens. For this purpose, we developed a SpRYCas9i variant, where expression was optimized, and tested its editing efficiency using the APT as a reporter gene. We show that the near PAMless SpRYCas9i effectively recognizes specific PAMs in P. patens that are not or poorly recognized by the native SpCas9. Pattern of mutations found using the SpRYCas9i are similar to the ones found with the SpCas9 and we could not detect off-target activity for the sgRNAs tested in this study. These findings contribute to advancing versatile genome editing techniques in plants.
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Affiliation(s)
- Julie Calbry
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France
| | - Guillaume Goudounet
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France
| | - Florence Charlot
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France
| | - Anouchka Guyon-Debast
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France
| | - Pierre-François Perroud
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France
| | - Fabien Nogué
- Institut Jean-Pierre Bourgin (IJPB), Université Paris-Saclay, INRAE, AgroParisTech, 78000, Versailles, France.
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Abstract
Protoplast production with the moss Physcomitrium (Physcomitrella) patens has a long and successful history. As a tool, it has not only been the base of reverse genetic studies covering research fields as diverse as development, metabolism, or gene network regulation but also allowed its development as a bioengineering platform for protein production. We present here a standardized protocol for protoplast production from Physcomitrium (Physcomitrella) patens protonemata. Additionally, we detail procedures for their transfection, their plating for optimal regeneration, and three alternative selection approaches. To improve the consistency of protoplast regeneration, we describe a new option for protoplast embedding. The use of an alginate matrix to regenerate moss protoplast alleviates the use of warm agarized medium. Thus, it optimizes transformed protoplast survival without any morphological detrimental effect or impact on transfection efficiency.
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Affiliation(s)
- Florence Charlot
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Guillaume Goudounet
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Fabien Nogué
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, Versailles, France
| | - Pierre-François Perroud
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, Versailles, France.
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Dai M, Georgilis E, Goudounet G, Garbay B, Pille J, van Hest JCM, Schultze X, Garanger E, Lecommandoux S. Refining the Design of Diblock Elastin-Like Polypeptides for Self-Assembly into Nanoparticles. Polymers (Basel) 2021; 13:1470. [PMID: 34062852 PMCID: PMC8125372 DOI: 10.3390/polym13091470] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 02/06/2023] Open
Abstract
Diblock copolymers based-on elastin-like polypeptide (ELP) have the potential to undergo specific phase transitions when thermally stimulated. This ability is especially suitable to form carriers, micellar structures for instance, for delivering active cargo molecules. Here, we report the design and study of an ELP diblock library based on ELP-[M1V3-i]-[I-j]. First, ELP-[M1V3-i]-[I-j] (i = 20, 40, 60; j = 20, 90) that showed a similar self-assembly propensity (unimer-to-aggregate transition) as their related monoblocks ELP-[M1V3-i] and ELP-[I-j]. By selectively oxidizing methionines of ELP-[M1V3-i] within the different diblocks structures, we have been able to access a thermal phase transition with three distinct regimes (unimers, micelles, aggregates) characteristic of well-defined ELP diblocks.
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Affiliation(s)
- Michèle Dai
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
- L’Oréal Recherche Avancée, 1 Avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France;
| | - Evangelos Georgilis
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
- Current affiliation E.G. (Evangelos Georgilis): CIC nanoGUNE (BRTA), Tolosa Hiribidea 76, 20018 Donostia-San Sebastián, Spain
| | - Guillaume Goudounet
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
| | - Bertrand Garbay
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
| | - Jan Pille
- Bio-organic Chemistry Lab, Eindhoven University of Technology, P.O. Box 513 (STO 3.31), 5600 MB Eindhoven, The Netherlands; (J.P.); (J.C.M.v.H.)
| | - Jan C. M. van Hest
- Bio-organic Chemistry Lab, Eindhoven University of Technology, P.O. Box 513 (STO 3.31), 5600 MB Eindhoven, The Netherlands; (J.P.); (J.C.M.v.H.)
| | - Xavier Schultze
- L’Oréal Recherche Avancée, 1 Avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France;
| | - Elisabeth Garanger
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
| | - Sébastien Lecommandoux
- University Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, 33600 Pessac, France; (M.D.); (E.G.); (G.G.); (B.G.)
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Dai M, Goudounet G, Zhao H, Garbay B, Garanger E, Pecastaings G, Schultze X, Lecommandoux S. Thermosensitive Hybrid Elastin-like Polypeptide-Based ABC Triblock Hydrogel. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01744] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Michèle Dai
- LCPO, UMR 5629, Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
- L’Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France
| | | | - Hang Zhao
- LCPO, UMR 5629, Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Bertrand Garbay
- LCPO, UMR 5629, Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Elisabeth Garanger
- LCPO, UMR 5629, Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Gilles Pecastaings
- LCPO, UMR 5629, Univ. Bordeaux, CNRS, Bordeaux INP, F-33600 Pessac, France
| | - Xavier Schultze
- L’Oréal Recherche Avancée, 1 avenue Eugène Schueller, 93600 Aulnay-sous-Bois, France
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Le Fer G, Portes D, Goudounet G, Guigner JM, Garanger E, Lecommandoux S. Design and self-assembly of PBLG-b-ELP hybrid diblock copolymers based on synthetic and elastin-like polypeptides. Org Biomol Chem 2017; 15:10095-10104. [DOI: 10.1039/c7ob01945a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and self-assembly of amphiphilic copolypeptides containing a recombinant elastin-like polypeptide block used as a macroinitiator for the ROP of γ-BLG NCA are presented.
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Affiliation(s)
- Gaëlle Le Fer
- Université de Bordeaux/Bordeaux INP
- ENSCBP
- Pessac 33607
- France
- CNRS
| | - Delphine Portes
- Université de Bordeaux/Bordeaux INP
- ENSCBP
- Pessac 33607
- France
- CNRS
| | | | - Jean-Michel Guigner
- Institut de Minéralogie et de Physique des Milieux Condensés (IMPMC)
- 75005 Paris
- France
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