1
|
Mendiratta S, Ray-Gallet D, Lemaire S, Gatto A, Forest A, Kerlin MA, Almouzni G. Regulation of replicative histone RNA metabolism by the histone chaperone ASF1. Mol Cell 2024; 84:791-801.e6. [PMID: 38262410 DOI: 10.1016/j.molcel.2023.12.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 08/18/2023] [Accepted: 12/21/2023] [Indexed: 01/25/2024]
Abstract
In S phase, duplicating and assembling the whole genome into chromatin requires upregulation of replicative histone gene expression. Here, we explored how histone chaperones control histone production in human cells to ensure a proper link with chromatin assembly. Depletion of the ASF1 chaperone specifically decreases the pool of replicative histones both at the protein and RNA levels. The decrease in their overall expression, revealed by total RNA sequencing (RNA-seq), contrasted with the increase in nascent/newly synthesized RNAs observed by 4sU-labeled RNA-seq. Further inspection of replicative histone RNAs showed a 3' end processing defect with an increase of pre-mRNAs/unprocessed transcripts likely targeted to degradation. Collectively, these data argue for a production defect of replicative histone RNAs in ASF1-depleted cells. We discuss how this regulation of replicative histone RNA metabolism by ASF1 as a "chaperone checkpoint" fine-tunes the histone dosage to avoid unbalanced situations deleterious for cell survival.
Collapse
|
2
|
Liu Z, Gao B, Chernichenko K, Yang H, Lemaire S, Tang W. Enantioselective C-H Arylation for Axially Chiral Heterobiaryls. Org Lett 2023; 25:7004-7008. [PMID: 37708038 DOI: 10.1021/acs.orglett.3c02478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
An enantioselective palladium-catalyzed C-H arylation of functionalized pyrazoles/triazoles/imidazoles is developed, affording a variety of axially chiral ortho-nitro/formyl-substituted heterobiaryls with excellent enantioselectivities and good yields. The method features a deuterated P-chiral phosphorus ligand CD3-AntPhos, a broad substrate scope of functionalized heterobiaryls, mild reaction conditions, and low palladium loadings.
Collapse
|
3
|
Wagschal S, Broggini D, Cao TD, Schleiss P, Paun K, Steiner J, Merk AL, Harsdorf J, Fiedler W, Schirling S, Hock S, Strittmatter T, Dijkmans J, Vervest I, Van Hoegaerden T, Egle B, Mower MP, Liu Z, Cao Z, He X, Chen L, Qin L, Tan H, Yan J, Cunière NL, Wei CS, Vuyyuru V, Ayothiraman R, Rangaswamy S, Jaleel M, Vaidyanathan R, Eastgate MD, Klep R, Benhaïm C, Vogels I, Peeters K, Lemaire S. Toward the Development of a Manufacturing Process for Milvexian: Scale-Up Synthesis of the Side Chain. Org Process Res Dev 2023. [DOI: 10.1021/acs.oprd.2c00399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
|
4
|
Zhdanko A, van der Worp BA, Lemaire S. Coordination Chemistry of Borane in Solution: Application to a STING Agonist. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
5
|
Hess A, Prohaska JP, Doerrich SB, Trauner F, Lutter FH, Lemaire S, Wagschal S, Karaghiosoff K, Knochel P. Directed regioselective ortho, ortho'-magnesiations of aromatics and heterocycles using sBu 2Mg in toluene. Chem Sci 2021; 12:8424-8429. [PMID: 34221323 PMCID: PMC8221067 DOI: 10.1039/d1sc01777b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/17/2021] [Indexed: 11/25/2022] Open
Abstract
Aryl azoles are ubiquitous as bioactive compounds and their regioselective functionalization is of utmost synthetic importance. Here, we report the development of a toluene-soluble dialkylmagnesium base sBu2Mg. This new reagent allows mild and regioselective ortho-magnesiations of various N-arylated pyrazoles and 1,2,3-triazoles as well as arenes bearing oxazoline, phosphorodiamidate or amide directing groups. The resulting diarylmagnesium reagents were further functionalized either by Pd-catalyzed arylation or by trapping reactions with a broad range of electrophiles (aldehydes, ketones, allylic halides, acyl chlorides, Weinreb amides, aryl halides, hydroxylamine benzoates, terminal alkynes). Furthermore, several double ortho,ortho'-magnesiations were realized in the case of aryl oxazolines, N-aryl pyrazoles as well as 2-aryl-2H-1,2,3-triazoles by simply repeating the magnesiation/electrophile trapping sequence allowing the preparation of valuable 1,2,3-functionalized arenes.
Collapse
|
6
|
Larmier C, Mazzolo A, Zoia A, Lemaire S, Riz D. PRELIMINARY INVESTIGATIONS OF TRANSPORT IN HETEROGENEOUS RANDOM MEDIA. EPJ WEB OF CONFERENCES 2021. [DOI: 10.1051/epjconf/202124704009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Random media emerge in several applications in reactor physics and safety analysis. Most often, models of stochastic media assume spatial homogeneity, whereas real-world complex materials, such as fuel chunks resulting from core degradation, typically display apparent heterogeneities. In a series of previous works, we have shown that stochastic tessellations can be successfully used in order to describe the material properties of several classes of random media. In this paper we extend these results to the case of heterogeneous random media by using Voronoi tessellations with space-dependent seed distributions, allowing for spatial gradients.
Collapse
|
7
|
Lutter FH, Grokenberger L, Perego LA, Broggini D, Lemaire S, Wagschal S, Knochel P. Regioselective functionalization of aryl azoles as powerful tool for the synthesis of pharmaceutically relevant targets. Nat Commun 2020; 11:4443. [PMID: 32895371 PMCID: PMC7477575 DOI: 10.1038/s41467-020-18188-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/03/2020] [Indexed: 02/02/2023] Open
Abstract
Aryl azole scaffolds are present in a wide range of pharmaceutically relevant molecules. Their ortho-selective metalation at the aryl ring is challenging, due to the competitive metalation of the more acidic heterocycle. Seeking a practical access to a key Active Pharmaceutical Ingredient (API) intermediate currently in development, we investigated the metalation of 1-aryl-1H-1,2,3-triazoles and other related heterocycles with sterically hindered metal-amide bases. We report here a room temperature and highly regioselective ortho-magnesiation of several aryl azoles using a tailored magnesium amide, TMPMgBu (TMP = 2,2,6,6-tetramethylpiperidyl) in hydrocarbon solvents followed by an efficient Pd-catalyzed arylation. This scalable and selective reaction allows variation of the initial substitution pattern of the aryl ring, the nature of the azole moiety, as well as the nature of the electrophile. This versatile method can be applied to the synthesis of bioactive azole derivatives and complements existing metal-mediated ortho-functionalizations. Aryl azoles are common scaffolds in pharmaceutically relevant molecules. Here, the authors report the mild and highly regioselective ortho magnesiation of aryl azoles using a tailored magnesium amide base in hydrocarbon solvents followed by an efficient Pd-catalyzed arylation.
Collapse
|
8
|
Lemaire S, Ferey V. A Taste of Current French Organic Chemistry. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Lemaire S, Fontrodona N, Aubé F, Claude JB, Polvèche H, Modolo L, Bourgeois CF, Mortreux F, Auboeuf D. Characterizing the interplay between gene nucleotide composition bias and splicing. Genome Biol 2019; 20:259. [PMID: 31783898 PMCID: PMC6883713 DOI: 10.1186/s13059-019-1869-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 10/28/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Nucleotide composition bias plays an important role in the 1D and 3D organization of the human genome. Here, we investigate the potential interplay between nucleotide composition bias and the regulation of exon recognition during splicing. RESULTS By analyzing dozens of RNA-seq datasets, we identify two groups of splicing factors that activate either about 3200 GC-rich exons or about 4000 AT-rich exons. We show that splicing factor-dependent GC-rich exons have predicted RNA secondary structures at 5' ss and are dependent on U1 snRNP-associated proteins. In contrast, splicing factor-dependent AT-rich exons have a large number of decoy branch points, SF1- or U2AF2-binding sites and are dependent on U2 snRNP-associated proteins. Nucleotide composition bias also influences local chromatin organization, with consequences for exon recognition during splicing. Interestingly, the GC content of exons correlates with that of their hosting genes, isochores, and topologically associated domains. CONCLUSIONS We propose that regional nucleotide composition bias over several dozens of kilobase pairs leaves a local footprint at the exon level and induces constraints during splicing that can be alleviated by local chromatin organization at the DNA level and recruitment of specific splicing factors at the RNA level. Therefore, nucleotide composition bias establishes a direct link between genome organization and local regulatory processes, like alternative splicing.
Collapse
|
10
|
Gautier T, Deckert V, Aires V, Le Guern N, Patoli D, Lemaire S, Maquart G, Bataille A, Xolin M, Magnani C, Masson D, Harscoët E, Da Silva B, Houdebine L, Jolivet G, Lagrost L. Human Apolipoprotein C1 Transgenesis To Inhibit Cetp And To Attenuate Atherosclerosis In Hypercholesterolemic Rabbits. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
11
|
Lemaire S, Diène C, Gavryushin A, Du Jourdin XM, Paolini L, Jusseau X, Knochel P, Farina V. Preparation of 2'-Deoxy-2'-spirocyclopropylcytidine via an Alternative Cyclopropanation Reaction. J Org Chem 2019; 84:4910-4914. [PMID: 30721067 DOI: 10.1021/acs.joc.8b02784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we report the preparation of 2'-deoxy-2'-spirocyclopropylcytidine via an alternative cyclopropanation reaction starting from γ-silyl tertiary alcohols. Activation of the hydroxyl function with thionyl chloride in the presence of 4-DMAP allows the ring-closing step under mild conditions. Participation of the uracil moiety in the cyclization step is proposed.
Collapse
|
12
|
Fontrodona N, Aubé F, Claude JB, Polvèche H, Lemaire S, Tranchevent LC, Modolo L, Mortreux F, Bourgeois CF, Auboeuf D. Interplay between coding and exonic splicing regulatory sequences. Genome Res 2019; 29:711-722. [PMID: 30962178 PMCID: PMC6499313 DOI: 10.1101/gr.241315.118] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 03/28/2019] [Indexed: 01/24/2023]
Abstract
The inclusion of exons during the splicing process depends on the binding of splicing factors to short low-complexity regulatory sequences. The relationship between exonic splicing regulatory sequences and coding sequences is still poorly understood. We demonstrate that exons that are coregulated by any given splicing factor share a similar nucleotide composition bias and preferentially code for amino acids with similar physicochemical properties because of the nonrandomness of the genetic code. Indeed, amino acids sharing similar physicochemical properties correspond to codons that have the same nucleotide composition bias. In particular, we uncover that the TRA2A and TRA2B splicing factors that bind to adenine-rich motifs promote the inclusion of adenine-rich exons coding preferentially for hydrophilic amino acids that correspond to adenine-rich codons. SRSF2 that binds guanine/cytosine-rich motifs promotes the inclusion of GC-rich exons coding preferentially for small amino acids, whereas SRSF3 that binds cytosine-rich motifs promotes the inclusion of exons coding preferentially for uncharged amino acids, like serine and threonine that can be phosphorylated. Finally, coregulated exons encoding amino acids with similar physicochemical properties correspond to specific protein features. In conclusion, the regulation of an exon by a splicing factor that relies on the affinity of this factor for specific nucleotide(s) is tightly interconnected with the exon-encoded physicochemical properties. We therefore uncover an unanticipated bidirectional interplay between the splicing regulatory process and its biological functional outcome.
Collapse
|
13
|
Hernán-Gómez A, Orr SA, Uzelac M, Kennedy AR, Barroso S, Jusseau X, Lemaire S, Farina V, Hevia E. Exploiting Synergistic Effects in Organozinc Chemistry for Direct Stereoselective C-Glycosylation Reactions at Room Temperature. Angew Chem Int Ed Engl 2018; 57:10630-10634. [PMID: 29856904 DOI: 10.1002/anie.201805758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 11/06/2022]
Abstract
Pairing a range of bis(aryl) zinc reagents ZnAr2 with the stronger Lewis acidic [(ZnArF2 )] (ArF =C6 F5 ), enables highly stereoselective cross-coupling between glycosyl bromides and ZnAr2 without the use of a transition metal. Reactions occur at room temperature with excellent levels of stereoselectivity, where ZnArF2 acts as a non-coupling partner although its presence is crucial for the execution of the C(sp2 )-C(sp3 ) bond formation process. Mechanistic studies have uncovered a unique synergistic partnership between the two zinc reagents, which circumvents the need for transition-metal catalysis or forcing reaction conditions. Key to the success of the coupling is the avoidance of solvents that act as Lewis bases versus diarylzinc compounds (e.g. THF).
Collapse
|
14
|
Hernán‐Gómez A, Orr SA, Uzelac M, Kennedy AR, Barroso S, Jusseau X, Lemaire S, Farina V, Hevia E. Exploiting Synergistic Effects in Organozinc Chemistry for Direct Stereoselective C‐Glycosylation Reactions at Room Temperature. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
15
|
Wagschal S, Lemaire S, Rabet P. Ferrier Rearrangement of 1,2-Dihydropyrans with Organozinc Species in Toluene/n-Dibutyl Ether. Synlett 2017. [DOI: 10.1055/s-0036-1588485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Herein, we report the catalyst-free addition of organozinc species to glycal derivatives and dihydropyrans in a toluene/n-dibutyl ether solvent mixture via a Ferrier rearrangement at room temperature. This methodology requires only a slight excess of the nucleophile and leads preferentially to the C-glycoside α-anomer. Various 1,2-dihydropyrans were assessed with a range of nucleophiles (aryl, alkynyl, alkyl) yielding the desired C-glycosides in good yield and diastereoselectivity up to 20:1.
Collapse
|
16
|
Thiollière N, Zanini L, David JC, Eikenberg J, Guertin A, Konobeyev AY, Lemaire S, Panebianco S. Gas Production in the MEGAPIE Spallation Target. NUCL SCI ENG 2017. [DOI: 10.13182/nse10-53] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
17
|
Toccoli C, Caillaud M, Démoulins M, Laithier A, Lemaire S, Ribes JC, Riz D. Specific Treatments of DIANE for Radiographic Applications. NUCL TECHNOL 2017. [DOI: 10.13182/nt09-a9329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
18
|
Toselli-Mollereau E, Robellet X, Fauque L, Lemaire S, Schiklenk C, Klein C, Hocquet C, Legros P, N'Guyen L, Mouillard L, Chautard E, Auboeuf D, Haering CH, Bernard P. Nucleosome eviction in mitosis assists condensin loading and chromosome condensation. EMBO J 2016; 35:1565-81. [PMID: 27266525 DOI: 10.15252/embj.201592849] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 05/05/2016] [Indexed: 12/15/2022] Open
Abstract
Condensins associate with DNA and shape mitotic chromosomes. Condensins are enriched nearby highly expressed genes during mitosis, but how this binding is achieved and what features associated with transcription attract condensins remain unclear. Here, we report that condensin accumulates at or in the immediate vicinity of nucleosome-depleted regions during fission yeast mitosis. Two transcriptional coactivators, the Gcn5 histone acetyltransferase and the RSC chromatin-remodelling complex, bind to promoters adjoining condensin-binding sites and locally evict nucleosomes to facilitate condensin binding and allow efficient mitotic chromosome condensation. The function of Gcn5 is closely linked to condensin positioning, since neither the localization of topoisomerase II nor that of the cohesin loader Mis4 is altered in gcn5 mutant cells. We propose that nucleosomes act as a barrier for the initial binding of condensin and that nucleosome-depleted regions formed at highly expressed genes by transcriptional coactivators constitute access points into chromosomes where condensin binds free genomic DNA.
Collapse
|
19
|
Audo R, Deckert V, Daien C, Che H, Elhmioui J, Pais de Barros JP, Lemaire S, Desrumaux C, Hahne M, Combe B, Lagrost L, Morel J. OP0212 Phospholipid Transfer Protein (PLTP): A Link between Inflammation and Lipids in Rheumatoid Arthritis? Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
20
|
Barroso S, Lemaire S, Farina V, Steib AK, Blanc R, Knochel P. Cine Substitution with Arylzinc Reagents: Scope and Mechanistic Studies. J Org Chem 2016; 81:2804-16. [DOI: 10.1021/acs.joc.6b00074] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Wagschal S, Guilbaud J, Rabet P, Farina V, Lemaire S. α-C-Glycosides via syn Opening of 1,2-Anhydro Sugars with Organozinc Compounds in Toluene/n-Dibutyl Ether. J Org Chem 2015; 80:9328-35. [DOI: 10.1021/acs.joc.5b01472] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
22
|
Baey C, Didier A, Lemaire S, Maupas F, Cournède PH. Parametrization of five classical plant growth models applied to sugar beet and comparison of their predictive capacity on root yield and total biomass. Ecol Modell 2014. [DOI: 10.1016/j.ecolmodel.2013.11.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
Baey C, Didier A, Lemaire S, Maupas F, Cournède PH. Modelling the interindividual variability of organogenesis in sugar beet populations using a hierarchical segmented model. Ecol Modell 2013. [DOI: 10.1016/j.ecolmodel.2013.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
24
|
Benhaim C, Lemaire S, Gaekens T, Govaerts T, Houpis I, Reniers P, Van Looy A, Vermeulen W, Bernhardt S, Diène C, Knochel P, Farina V. Synthesis of (4′R)-Azido-(2′R)-2′-Deoxy-2′-C-Methyluridine and Its Esters by Direct Iodide Displacement. Synlett 2013. [DOI: 10.1055/s-0033-1339293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
25
|
Tulkens P, Lemaire S. P106 Comparing susceptibility profiles of antibiotics by contour interval analysis: Ceftaroline and Belgian Streptococcus pneumoniae (SP) and MRSA isolates. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70350-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|