1
|
Mouradian S, Cicciarello D, Lacoste N, Risson V, Berretta F, Le Grand F, Rose N, Simonet T, Schaeffer L, Scionti I. LSD1 controls a nuclear checkpoint in Wnt/β-Catenin signaling to regulate muscle stem cell self-renewal. Nucleic Acids Res 2024; 52:3667-3681. [PMID: 38321961 DOI: 10.1093/nar/gkae060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 02/08/2024] Open
Abstract
The Wnt/β-Catenin pathway plays a key role in cell fate determination during development and in adult tissue regeneration by stem cells. These processes involve profound gene expression and epigenome remodeling and linking Wnt/β-Catenin signaling to chromatin modifications has been a challenge over the past decades. Functional studies of the lysine demethylase LSD1/KDM1A converge to indicate that this epigenetic regulator is a key regulator of cell fate, although the extracellular cues controlling LSD1 action remain largely unknown. Here we show that β-Catenin is a substrate of LSD1. Demethylation by LSD1 prevents β-Catenin degradation thereby maintaining its nuclear levels. Consistently, in absence of LSD1, β-Catenin transcriptional activity is reduced in both MuSCs and ESCs. Moreover, inactivation of LSD1 in mouse muscle stem cells and embryonic stem cells shows that LSD1 promotes mitotic spindle orientation via β-Catenin protein stabilization. Altogether, by inscribing LSD1 and β-Catenin in the same molecular cascade linking extracellular factors to gene expression, our results provide a mechanistic explanation to the similarity of action of canonical Wnt/β-Catenin signaling and LSD1 on stem cell fate.
Collapse
Affiliation(s)
- Sandrine Mouradian
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Delia Cicciarello
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Valérie Risson
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Francesca Berretta
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Fabien Le Grand
- Sorbonne Université, UPMC Université Paris 06, INSERM UMRS974, CNRS FRE3617, Center for Research in Myology, 75013 Paris, France
| | - Nicolas Rose
- Sorbonne Université, UPMC Université Paris 06, INSERM UMRS974, CNRS FRE3617, Center for Research in Myology, 75013 Paris, France
| | - Thomas Simonet
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
- Centre de Biotechnologie Cellulaire, Hospices Civils de Lyon, groupement Est, Bron, France
| | - Isabella Scionti
- Pathophysiology and Genetics of Neuron and Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS UMR5261, INSERM U1315, Faculté de Médecine Rockefeller, France
| |
Collapse
|
2
|
Belotti E, Lacoste N, Iftikhar A, Simonet T, Papin C, Osseni A, Streichenberger N, Mari PO, Girard E, Graies M, Giglia-Mari G, Dimitrov S, Hamiche A, Schaeffer L. H2A.Z is involved in premature aging and DSB repair initiation in muscle fibers. Nucleic Acids Res 2024; 52:3031-3049. [PMID: 38281187 PMCID: PMC11014257 DOI: 10.1093/nar/gkae020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 12/13/2023] [Accepted: 01/19/2024] [Indexed: 01/30/2024] Open
Abstract
Histone variants are key epigenetic players, but their functional and physiological roles remain poorly understood. Here, we show that depletion of the histone variant H2A.Z in mouse skeletal muscle causes oxidative stress, oxidation of proteins, accumulation of DNA damages, and both neuromuscular junction and mitochondria lesions that consequently lead to premature muscle aging and reduced life span. Investigation of the molecular mechanisms involved shows that H2A.Z is required to initiate DNA double strand break repair by recruiting Ku80 at DNA lesions. This is achieved via specific interactions of Ku80 vWA domain with H2A.Z. Taken as a whole, our data reveal that H2A.Z containing nucleosomes act as a molecular platform to bring together the proteins required to initiate and process DNA double strand break repair.
Collapse
Affiliation(s)
- Edwige Belotti
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Nicolas Lacoste
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Arslan Iftikhar
- For Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS/INSERM/ULP, Parc d’innovation, 1 rue Laurent Fries, 67404 Ilkirch Cedex, France
| | - Thomas Simonet
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Christophe Papin
- For Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS/INSERM/ULP, Parc d’innovation, 1 rue Laurent Fries, 67404 Ilkirch Cedex, France
| | - Alexis Osseni
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Nathalie Streichenberger
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Pierre-Olivier Mari
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Emmanuelle Girard
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Mohamed Graies
- Institute for Advanced Biosciences (IAB), Université Grenoble Alpes, CNRS UMR 5309, INSERM U1209, Site Santé - Allée des Alpes, 38700 La Tronche, France
| | - Giuseppina Giglia-Mari
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
| | - Stefan Dimitrov
- Institute for Advanced Biosciences (IAB), Université Grenoble Alpes, CNRS UMR 5309, INSERM U1209, Site Santé - Allée des Alpes, 38700 La Tronche, France
| | - Ali Hamiche
- For Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS/INSERM/ULP, Parc d’innovation, 1 rue Laurent Fries, 67404 Ilkirch Cedex, France
| | - Laurent Schaeffer
- Laboratoire Physiopathologie et Génétique du Neurone et du Muscle (PGNM), Institut NeuroMyoGène, Université Claude Bernard Lyon 1, INSERM U1315, CNRS UMR 5261, 8 avenue Rockefeller, 69008 Lyon, France
- Centre de Biotechnologie Cellulaire, Hospices Civils de Lyon, Lyon, France
| |
Collapse
|
3
|
Jacquier A, Theuriet J, Fontaine F, Mosbach V, Lacoste N, Ribault S, Risson V, Carras J, Coudert L, Simonet T, Latour P, Stojkovic T, Piard J, Cosson A, Lesca G, Bouhour F, Allouche S, Puccio H, Pegat A, Schaeffer L. Homozygous COQ7 mutation: a new cause of potentially treatable distal hereditary motor neuropathy. Brain 2023; 146:3470-3483. [PMID: 36454683 PMCID: PMC10393394 DOI: 10.1093/brain/awac453] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 07/18/2022] [Revised: 10/30/2022] [Accepted: 11/20/2022] [Indexed: 08/03/2023] Open
Abstract
Distal hereditary motor neuropathy represents a group of motor inherited neuropathies leading to distal weakness. We report a family of two brothers and a sister affected by distal hereditary motor neuropathy in whom a homozygous variant c.3G>T (p.1Met?) was identified in the COQ7 gene. This gene encodes a protein required for coenzyme Q10 biosynthesis, a component of the respiratory chain in mitochondria. Mutations of COQ7 were previously associated with severe multi-organ disorders characterized by early childhood onset and developmental delay. Using patient blood samples and fibroblasts derived from a skin biopsy, we investigated the pathogenicity of the variant of unknown significance c.3G>T (p.1Met?) in the COQ7 gene and the effect of coenzyme Q10 supplementation in vitro. We showed that this variation leads to a severe decrease in COQ7 protein levels in the patient's fibroblasts, resulting in a decrease in coenzyme Q10 production and in the accumulation of 6-demethoxycoenzyme Q10, the COQ7 substrate. Interestingly, such accumulation was also found in the patient's plasma. Normal coenzyme Q10 and 6-demethoxycoenzyme Q10 levels were restored in vitro by using the coenzyme Q10 precursor 2,4-dihydroxybenzoic acid, thus bypassing the COQ7 requirement. Coenzyme Q10 biosynthesis deficiency is known to impair the mitochondrial respiratory chain. Seahorse experiments showed that the patient's cells mainly rely on glycolysis to maintain sufficient ATP production. Consistently, the replacement of glucose by galactose in the culture medium of these cells reduced their proliferation rate. Interestingly, normal proliferation was restored by coenzyme Q10 supplementation of the culture medium, suggesting a therapeutic avenue for these patients. Altogether, we have identified the first example of recessive distal hereditary motor neuropathy caused by a homozygous variation in the COQ7 gene, which should thus be included in the gene panels used to diagnose peripheral inherited neuropathies. Furthermore, 6-demethoxycoenzyme Q10 accumulation in the blood can be used to confirm the pathogenic nature of the mutation. Finally, supplementation with coenzyme Q10 or derivatives should be considered to prevent the progression of COQ7-related peripheral inherited neuropathy in diagnosed patients.
Collapse
Affiliation(s)
- Arnaud Jacquier
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Centre de Biotechnologie Cellulaire, CBC Biotec, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Julian Theuriet
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Hôpital Neurologique Pierre Wertheimer, Service d’électroneuromyographie et de pathologies neuromusculaires, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Fanny Fontaine
- Service de Biochimie, CHU de Caen, UMRS 1237 PhIND, Université de Caen, Caen, France
| | - Valentine Mosbach
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Shams Ribault
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Hôpital Henry Gabrielle, Service de Médecine Physique et de Réadaptation, CHU de Lyon—Hospices Civils de Lyon (HCL), Saint-Genis-Laval, France
| | - Valérie Risson
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Julien Carras
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Laurent Coudert
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Thomas Simonet
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Philippe Latour
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Unité fonctionnelle de neurogénétique moléculaire, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Tanya Stojkovic
- Institut de Myologie, Hôpital Pitié-Salpêtrière, Assistance Publique des Hôpitaux de Paris (APHP), Paris, France
| | - Juliette Piard
- Centre de Génétique Humaine, CHU, Besançon, France
- UMR-Inserm 1231 GAD, Génétique des Anomalies du Développement, Université de Bourgogne Franche-Comté, Dijon, France
| | - Anne Cosson
- Neurologie Électrophysiologie Clinique, CHU Jean-Minjoz, Besançon, France
| | - Gaëtan Lesca
- Service de génétique, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Françoise Bouhour
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Hôpital Neurologique Pierre Wertheimer, Service d’électroneuromyographie et de pathologies neuromusculaires, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Stéphane Allouche
- Service de Biochimie, CHU de Caen, UMRS 1237 PhIND, Université de Caen, Caen, France
| | - Hélène Puccio
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Antoine Pegat
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Hôpital Neurologique Pierre Wertheimer, Service d’électroneuromyographie et de pathologies neuromusculaires, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
- Centre de Biotechnologie Cellulaire, CBC Biotec, CHU de Lyon—Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| |
Collapse
|
4
|
Jacquier A, Theuriet J, Ribault S, Lacoste N, Pégat A, Latour P, Schaeffer L. Reply: Biallelic variants in the COQ7 gene cause distal hereditary motor neuropathy in two Chinese families. Brain 2023; 146:e31-e32. [PMID: 36759155 DOI: 10.1093/brain/awad041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 02/11/2023] Open
Affiliation(s)
- Arnaud Jacquier
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Centre de Biotechnologie Cellulaire et CBC Biotec, CHU de Lyon - Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Julian Theuriet
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Hôpital Neurologique Pierre Wertheimer, Service d'électroneuromyographie et de pathologies neuromusculaires, CHU de Lyon - Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Shams Ribault
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Hôpital Henry Gabrielle, Service de Médecine Physique et de Réadaptation, CHU de Lyon - Hospices Civils de Lyon (HCL), Saint-Genis-Laval, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France
| | - Antoine Pégat
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Hôpital Neurologique Pierre Wertheimer, Service d'électroneuromyographie et de pathologies neuromusculaires, CHU de Lyon - Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Philippe Latour
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Unité fonctionnelle de neurogénétique moléculaire, CHU de Lyon - Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, Université Lyon1, Faculté de Médecine Lyon Est, Lyon, France.,Centre de Biotechnologie Cellulaire et CBC Biotec, CHU de Lyon - Hospices Civils de Lyon (HCL) groupement Est, Bron, France
| |
Collapse
|
5
|
Jacquier A, Ribault S, Mendes M, Lacoste N, Risson V, Carras J, Latour P, Nadaj-Pakleza A, Stojkovic T, Schaeffer L. Expanding the phenotypic variability of MORC2 gene mutations: From Charcot-Marie-Tooth disease to late-onset pure motor neuropathy. Hum Mutat 2022; 43:1898-1908. [PMID: 35904125 PMCID: PMC10087860 DOI: 10.1002/humu.24445] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/09/2022] [Accepted: 07/27/2022] [Indexed: 01/25/2023]
Abstract
MORC2 gene encodes a ubiquitously expressed nuclear protein involved in chromatin remodeling, DNA repair, and transcriptional regulation. Heterozygous mutations in MORC2 gene have been associated with a spectrum of disorders affecting the peripheral nervous system such as Charcot-Marie-Tooth (CMT2Z), spinal muscular atrophy-like with or without cerebellar involvement, and a developmental syndrome associated with impaired growth, craniofacial dysmorphism and axonal neuropathy (DIGFAN syndrome). Such variability in clinical manifestations associated with the increasing number of variants of unknown significance detected by next-generation sequencing constitutes a serious diagnostic challenge. Here we report the characterization of an in vitro model to evaluate the pathogenicity of variants of unknown significance based on MORC2 overexpression in a neuroblastoma cell line SH-EP or cortical neurons. Likewise, we show that MORC2 mutants affect survival and trigger apoptosis over time in SH-EP cell line. Furthermore, overexpression in primary cortical neurons increases apoptotic cell death and decreases neurite outgrowth. Altogether, these approaches establish the pathogenicity of two new variants p.Gly444Arg and p.His446Gln in three patients from two families. These new mutations in MORC2 gene are associated with autosomal dominant CMT and with adult late onset proximal motor neuropathy, further increasing the spectrum of clinical manifestations associated with MORC2 mutations.
Collapse
Affiliation(s)
- Arnaud Jacquier
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France.,Centre de Biotechnologie Cellulaire, CBC Biotec, CHU de Lyon-HCL groupement Est, Bron, France
| | - Shams Ribault
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France.,Service de Médecine Physique et de Réadaptation, Hôpital Henry Gabrielle, Hospices Civils de Lyon, Saint-Genis-Laval, France
| | - Michel Mendes
- Service de Neurologie, Centro Hospitalar Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Nicolas Lacoste
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France
| | - Valérie Risson
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France
| | - Julien Carras
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France.,Centre de Biotechnologie Cellulaire, CBC Biotec, CHU de Lyon-HCL groupement Est, Bron, France
| | - Philippe Latour
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France.,Unité fonctionnelle de neurogénétique moléculaire, CHU de Lyon-HCL groupement Est, Bron, France
| | - Aleksandra Nadaj-Pakleza
- Centre de Référence des maladies Neuromusculaires Nord/Est/Ile-de-France, Service de Neurologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Tanya Stojkovic
- Institut de Myologie, Hôpital Pitié-Salpêtrière, Paris, France
| | - Laurent Schaeffer
- PGNM, Institut NeuroMyoGène, Université Lyon1-CNRS UMR5261-INSERM U1315, Lyon, France.,Centre de Biotechnologie Cellulaire, CBC Biotec, CHU de Lyon-HCL groupement Est, Bron, France
| |
Collapse
|
6
|
Pegat A, Streichenberger N, Lacoste N, Hermier M, Menassa R, Coudert L, Theuriet J, Froissart R, Terrone S, Bouhour F, Michel-Calemard L, Schaeffer L, Jacquier A. Novel Intronic Mutation in VMA21 Causing Severe Phenotype of X-Linked Myopathy with Excessive Autophagy-Case Report. Genes (Basel) 2022; 13:genes13122245. [PMID: 36553512 PMCID: PMC9777698 DOI: 10.3390/genes13122245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/18/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
X-linked Myopathy with Excessive Autophagy (XMEA) is a rare autophagic vacuolar myopathy caused by mutations in the Vacuolar ATPase assembly factor VMA21 gene; onset usually occurs during childhood and rarely occurs during adulthood. We described a 22-year-old patient with XMEA, whose onset was declared at 11 through gait disorder. He had severe four-limb proximal weakness and amyotrophy, and his proximal muscle MRC score was between 2 and 3/5 in four limbs; creatine kinase levels were elevated (1385 IU/L), and electroneuromyography and muscle MRI were suggestive of myopathy. Muscle biopsy showed abnormalities typical of autophagic vacuolar myopathy. We detected a hemizygous, unreported, intronic, single-nucleotide substitution c.164-20T>A (NM_001017980.4) in intron 2 of the VMA21 gene. Fibroblasts derived from this patient displayed a reduced level of VMA21 transcripts (at 40% of normal) and protein, suggesting a pathogenicity related to an alteration of the splicing efficiency associated with an intron retention. This patient with XMEA displayed a severe phenotype (rapid weakness of upper and lower limbs) due to a new intronic variant of VMA21, related to an alteration in the splicing efficiency associated with intron retention, suggesting that phenotype severity is closely related to the residual expression of the VMA21 protein.
Collapse
Affiliation(s)
- Antoine Pegat
- Service ENMG et Pathologies Neuromusculaires, Hôpital Neurologique P. Wertheimer, Hospices Civils de Lyon, 69500 Bron, France
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Correspondence: (A.P.); (A.J.)
| | - Nathalie Streichenberger
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Service d’anatomopathologie, Centre de Biologie et Pathologie Est (CBPE), Hospices Civils de Lyon, 69500 Bron, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
| | - Marc Hermier
- Service de Neuroradiologie, Hôpital Neurologique P. Wertheimer, Hospices Civils de Lyon, 69500 Bron, France
| | - Rita Menassa
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Service de Biochimie et Biologie Moléculaire, Centre de Biologie et Pathologie Est (CBPE), Hospices Civils de Lyon, 69500 Bron, France
| | - Laurent Coudert
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
| | - Julian Theuriet
- Service ENMG et Pathologies Neuromusculaires, Hôpital Neurologique P. Wertheimer, Hospices Civils de Lyon, 69500 Bron, France
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
| | - Roseline Froissart
- Service de Biochimie et Biologie Moléculaire, Centre de Biologie et Pathologie Est (CBPE), Hospices Civils de Lyon, 69500 Bron, France
| | - Sophie Terrone
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
| | - Francoise Bouhour
- Service ENMG et Pathologies Neuromusculaires, Hôpital Neurologique P. Wertheimer, Hospices Civils de Lyon, 69500 Bron, France
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
| | - Laurence Michel-Calemard
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Service de Biochimie et Biologie Moléculaire, Centre de Biologie et Pathologie Est (CBPE), Hospices Civils de Lyon, 69500 Bron, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Centre de Biotechnologie Cellulaire, CBC Biotec, Hospices Civils de Lyon-Groupement Est, 69500 Bron, France
| | - Arnaud Jacquier
- Pathophysiology and Genetics of Neuron and Muscle, CNRS UMR 5261, INSERM U1315, INMG, Université Claude Bernard Lyon 1, Faculté de Médecine Lyon Est, 69008 Lyon, France
- Centre de Biotechnologie Cellulaire, CBC Biotec, Hospices Civils de Lyon-Groupement Est, 69500 Bron, France
- Correspondence: (A.P.); (A.J.)
| |
Collapse
|
7
|
Jacquier A, Risson V, Simonet T, Roussange F, Lacoste N, Ribault S, Carras J, Theuriet J, Girard E, Grosjean I, Le Goff L, Kröger S, Meltoranta J, Bauché S, Sternberg D, Fournier E, Kostera-Pruszczyk A, O’Connor E, Eymard B, Lochmüller H, Martinat C, Schaeffer L. Severe congenital myasthenic syndromes caused by agrin mutations affecting secretion by motoneurons. Acta Neuropathol 2022; 144:707-731. [PMID: 35948834 PMCID: PMC9468088 DOI: 10.1007/s00401-022-02475-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 07/25/2022] [Accepted: 07/25/2022] [Indexed: 01/28/2023]
Abstract
Congenital myasthenic syndromes (CMS) are predominantly characterized by muscle weakness and fatigability and can be caused by a variety of mutations in genes required for neuromuscular junction formation and maintenance. Among them, AGRN encodes agrin, an essential synaptic protein secreted by motoneurons. We have identified severe CMS patients with uncharacterized p.R1671Q, p.R1698P and p.L1664P mutations in the LG2 domain of agrin. Overexpression in primary motoneurons cultures in vitro and in chick spinal motoneurons in vivo revealed that the mutations modified agrin trafficking, leading to its accumulation in the soma and/or in the axon. Expression of mutant agrins in cultured cells demonstrated accumulation of agrin in the endoplasmic reticulum associated with induction of unfolded protein response (UPR) and impaired secretion in the culture medium. Interestingly, evaluation of the specific activity of individual agrins on AChR cluster formation indicated that when secreted, mutant agrins retained a normal capacity to trigger the formation of AChR clusters. To confirm agrin accumulation and secretion defect, iPS cells were derived from a patient and differentiated into motoneurons. Patient iPS-derived motoneurons accumulated mutant agrin in the soma and increased XBP1 mRNA splicing, suggesting UPR activation. Moreover, co-cultures of patient iPS-derived motoneurons with myotubes confirmed the deficit in agrin secretion and revealed a reduction in motoneuron survival. Altogether, we report the first mutations in AGRN gene that specifically affect agrin secretion by motoneurons. Interestingly, the three patients carrying these mutations were initially suspected of spinal muscular atrophy (SMA). Therefore, in the presence of patients with a clinical presentation of SMA but without mutation in the SMN1 gene, it can be worth to look for mutations in AGRN.
Collapse
Affiliation(s)
- Arnaud Jacquier
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Valérie Risson
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Thomas Simonet
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Florine Roussange
- grid.503216.30000 0004 0618 2124INSERM/UEPS UMR 861, Paris Saclay Université, I-STEM, 91100 Corbeil-Essonnes, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Shams Ribault
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Service de Médecine Physique et de Réadaptation, Hôpital Henry Gabrielle, Hospices Civils de Lyon, 69230 Saint-Genis-Laval, France
| | - Julien Carras
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Julian Theuriet
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Emmanuelle Girard
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Isabelle Grosjean
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Laure Le Goff
- grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Stephan Kröger
- Department of Physiological Genomics, Biomedical Center, Planegg, Martinsried, Germany
| | - Julia Meltoranta
- Department of Physiological Genomics, Biomedical Center, Planegg, Martinsried, Germany
| | - Stéphanie Bauché
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France
| | - Damien Sternberg
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058APHP, UF Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Emmanuel Fournier
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058AP-HP, Hôpital Pitié-Salpêtrière, 75013 Paris, France ,grid.462844.80000 0001 2308 1657Département d’Éthique de l’Université et des enseignements de Physiologie de la Faculté de Médecine Pitié-Salpêtrière, 75013 Paris, France
| | - Anna Kostera-Pruszczyk
- grid.13339.3b0000000113287408Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Emily O’Connor
- grid.28046.380000 0001 2182 2255Division of Neurology, Department of Medicine, Children’s Hospital of Eastern Ontario Research Institute, The Ottawa Hospital and Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | - Bruno Eymard
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058AP-HP, Hôpital Pitié-Salpêtrière, 75013 Paris, France
| | - Hanns Lochmüller
- grid.28046.380000 0001 2182 2255Division of Neurology, Department of Medicine, Children’s Hospital of Eastern Ontario Research Institute, The Ottawa Hospital and Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | - Cécile Martinat
- grid.503216.30000 0004 0618 2124INSERM/UEPS UMR 861, Paris Saclay Université, I-STEM, 91100 Corbeil-Essonnes, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| |
Collapse
|
8
|
Belotti E, Lacoste N, Simonet T, Papin C, Padmanabhan K, Scionti I, Gangloff YG, Ramos L, Dalkara D, Hamiche A, Dimitrov S, Schaeffer L. H2A.Z is dispensable for both basal and activated transcription in post-mitotic mouse muscles. Nucleic Acids Res 2020; 48:4601-4613. [PMID: 32266374 PMCID: PMC7229818 DOI: 10.1093/nar/gkaa157] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/06/2020] [Accepted: 02/29/2020] [Indexed: 02/07/2023] Open
Abstract
While the histone variant H2A.Z is known to be required for mitosis, it is also enriched in nucleosomes surrounding the transcription start site of active promoters, implicating H2A.Z in transcription. However, evidence obtained so far mainly rely on correlational data generated in actively dividing cells. We have exploited a paradigm in which transcription is uncoupled from the cell cycle by developing an in vivo system to inactivate H2A.Z in terminally differentiated post-mitotic muscle cells. ChIP-seq, RNA-seq and ATAC-seq experiments performed on H2A.Z KO post-mitotic muscle cells show that this histone variant is neither required to maintain nor to activate transcription. Altogether, this study provides in vivo evidence that in the absence of mitosis H2A.Z is dispensable for transcription and that the enrichment of H2A.Z on active promoters is a marker but not an active driver of transcription.
Collapse
Affiliation(s)
- Edwige Belotti
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
| | - Nicolas Lacoste
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
| | - Thomas Simonet
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
| | - Christophe Papin
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, Parc d’innovation, 1 rue Laurent Fries, 67404 Ilkirch Cedex, France
| | - Kiran Padmanabhan
- Institut de Génomique Fonctionnelle de Lyon, CNRS UMR 5242, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, 32-34 Avenue Tony Garnier, 69007 Lyon, France
| | - Isabella Scionti
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
| | - Yann-Gaël Gangloff
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
| | - Lorrie Ramos
- Institute for Advanced Biosciences (IAB), Université Grenoble Alpes, CNRS UMR 5309, INSERM U1209, Site Santé - Allée des Alpes, 38700 La Tronche, France
| | - Defne Dalkara
- Institute for Advanced Biosciences (IAB), Université Grenoble Alpes, CNRS UMR 5309, INSERM U1209, Site Santé - Allée des Alpes, 38700 La Tronche, France
| | - Ali Hamiche
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, Parc d’innovation, 1 rue Laurent Fries, 67404 Ilkirch Cedex, France
| | - Stefan Dimitrov
- Institute for Advanced Biosciences (IAB), Université Grenoble Alpes, CNRS UMR 5309, INSERM U1209, Site Santé - Allée des Alpes, 38700 La Tronche, France
- Izmir Biomedicine and Genome Center, Dokuz Eylul University Health Campus, Balcova, Izmir 35330, Turkey
| | - Laurent Schaeffer
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, Université de Lyon, INSERM U1217, CNRS UMR5310, 8 avenue Rockefeller, 69008 Lyon, France
- Centre de Biotechnologie Cellulaire, Hospices Civils de Lyon, Lyon, France
| |
Collapse
|
9
|
Müller S, Montes de Oca R, Lacoste N, Dingli F, Loew D, Almouzni G. Phosphorylation and DNA binding of HJURP determine its centromeric recruitment and function in CenH3(CENP-A) loading. Cell Rep 2014; 8:190-203. [PMID: 25001279 DOI: 10.1016/j.celrep.2014.06.002] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/21/2014] [Accepted: 06/01/2014] [Indexed: 01/20/2023] Open
Abstract
Centromeres, epigenetically defined by the presence of the histone H3 variant CenH3, are essential for ensuring proper chromosome segregation. In mammals, centromeric CenH3(CENP-A) deposition requires its dedicated chaperone HJURP and occurs during telophase/early G1. We find that the cell-cycle-dependent recruitment of HJURP to centromeres depends on its timely phosphorylation controlled via cyclin-dependent kinases. A nonphosphorylatable HJURP mutant localizes prematurely to centromeres in S and G2 phase. This unregulated targeting causes a premature loading of CenH3(CENP-A) at centromeres, and cell-cycle delays ensue. Once recruited to centromeres, HJURP functions to promote CenH3(CENP-A) deposition by a mechanism involving a unique DNA-binding domain. With our findings, we propose a model wherein (1) the phosphorylation state of HJURP controls its centromeric recruitment in a cell-cycle-dependent manner, and (2) HJURP binding to DNA is a mechanistic determinant in CenH3(CENP-A) loading.
Collapse
Affiliation(s)
- Sebastian Müller
- Institut Curie, Centre de Recherche, Paris 75248, France; CNRS, UMR3664, Paris 75248, France; Equipe Labellisée Ligue contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France; Sorbonne University, Paris 75005, France
| | - Rocio Montes de Oca
- Institut Curie, Centre de Recherche, Paris 75248, France; CNRS, UMR3664, Paris 75248, France; Equipe Labellisée Ligue contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France; Sorbonne University, Paris 75005, France
| | - Nicolas Lacoste
- Institut Curie, Centre de Recherche, Paris 75248, France; CNRS, UMR3664, Paris 75248, France; Equipe Labellisée Ligue contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France; Sorbonne University, Paris 75005, France
| | - Florent Dingli
- Institut Curie, Centre de Recherche, Paris 75248, France; Laboratory of Proteomic Mass Spectrometry, 75248 Paris Cedex 05, France
| | - Damarys Loew
- Institut Curie, Centre de Recherche, Paris 75248, France; Laboratory of Proteomic Mass Spectrometry, 75248 Paris Cedex 05, France
| | - Geneviève Almouzni
- Institut Curie, Centre de Recherche, Paris 75248, France; CNRS, UMR3664, Paris 75248, France; Equipe Labellisée Ligue contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France; Sorbonne University, Paris 75005, France.
| |
Collapse
|
10
|
Rossetto D, Cramet M, Wang AY, Steunou AL, Lacoste N, Schulze JM, Côté V, Monnet-Saksouk J, Piquet S, Nourani A, Kobor MS, Côté J. Eaf5/7/3 form a functionally independent NuA4 submodule linked to RNA polymerase II-coupled nucleosome recycling. EMBO J 2014; 33:1397-415. [PMID: 24843044 DOI: 10.15252/embj.201386433] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The NuA4 histone acetyltransferase complex is required for gene regulation, cell cycle progression, and DNA repair. Dissection of the 13-subunit complex reveals that the Eaf7 subunit bridges Eaf5 with Eaf3, a H3K36me3-binding chromodomain protein, and this Eaf5/7/3 trimer is anchored to NuA4 through Eaf5. This trimeric subcomplex represents a functional module, and a large portion exists in a native form outside the NuA4 complex. Gene-specific and genome-wide location analyses indicate that Eaf5/7/3 correlates with transcription activity and is enriched over the coding region. In agreement with a role in transcription elongation, the Eaf5/7/3 trimer interacts with phosphorylated RNA polymerase II and helps its progression. Loss of Eaf5/7/3 partially suppresses intragenic cryptic transcription arising in set2 mutants, supporting a role in nucleosome destabilization. On the other hand, loss of the trimer leads to an increase of replication-independent histone exchange over the coding region of transcribed genes. Taken together, these results lead to a model where Eaf5/7/3 associates with elongating polymerase to promote the disruption of nucleosomes in its path, but also their refolding in its wake.
Collapse
Affiliation(s)
- Dorine Rossetto
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Myriam Cramet
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Alice Y Wang
- Center for Molecular Medicine and Therapeutics, Child and Family Research Institute, Vancouver, BC, Canada
| | - Anne-Lise Steunou
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Nicolas Lacoste
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Julia M Schulze
- Center for Molecular Medicine and Therapeutics, Child and Family Research Institute, Vancouver, BC, Canada
| | - Valérie Côté
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Julie Monnet-Saksouk
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Sandra Piquet
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Amine Nourani
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| | - Michael S Kobor
- Center for Molecular Medicine and Therapeutics, Child and Family Research Institute, Vancouver, BC, Canada
| | - Jacques Côté
- St-Patrick Research Group in Basic Oncology, Laval University Cancer Research Center Centre de Recherche du CHU de Québec-Axe Oncologie Hôtel-Dieu de Québec, Quebec City, QC, Canada
| |
Collapse
|
11
|
Lacoste N, Woolfe A, Tachiwana H, Garea AV, Barth T, Cantaloube S, Kurumizaka H, Imhof A, Almouzni G. Mislocalization of the centromeric histone variant CenH3/CENP-A in human cells depends on the chaperone DAXX. Mol Cell 2014; 53:631-44. [PMID: 24530302 DOI: 10.1016/j.molcel.2014.01.018] [Citation(s) in RCA: 184] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 10/02/2013] [Accepted: 01/07/2014] [Indexed: 01/17/2023]
Abstract
Centromeres are essential for ensuring proper chromosome segregation in eukaryotes. Their definition relies on the presence of a centromere-specific H3 histone variant CenH3, known as CENP-A in mammals. Its overexpression in aggressive cancers raises questions concerning its effect on chromatin dynamics and contribution to tumorigenesis. We find that CenH3 overexpression in human cells leads to ectopic enrichment at sites of active histone turnover involving a heterotypic tetramer containing CenH3-H4 with H3.3-H4. Ectopic localization of this particle depends on the H3.3 chaperone DAXX rather than the dedicated CenH3 chaperone HJURP. This aberrant nucleosome occludes CTCF binding and has a minor effect on gene expression. Cells overexpressing CenH3 are more tolerant of DNA damage. Both the survival advantage and CTCF occlusion in these cells are dependent on DAXX. Our findings illustrate how changes in histone variant levels can disrupt chromatin dynamics and suggests a possible mechanism for cell resistance to anticancer treatments.
Collapse
Affiliation(s)
- Nicolas Lacoste
- Institut Curie, Centre de Recherche, Paris75248, France; CNRS, UMR3664, Paris75248, France; Equipe Labellisée Ligue Contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France
| | - Adam Woolfe
- Institut Curie, Centre de Recherche, Paris75248, France; CNRS, UMR3664, Paris75248, France; Equipe Labellisée Ligue Contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France
| | - Hiroaki Tachiwana
- Institut Curie, Centre de Recherche, Paris75248, France; CNRS, UMR3664, Paris75248, France; Equipe Labellisée Ligue Contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France
| | - Ana Villar Garea
- Histone Modifications Group, Scientific Coordinator ZfP (Zentrallabor für Proteinanalytik), Adolf Butenandt Institut, University of Munich, Schillerstraße 44, 80336 Munich, Germany
| | - Teresa Barth
- Histone Modifications Group, Scientific Coordinator ZfP (Zentrallabor für Proteinanalytik), Adolf Butenandt Institut, University of Munich, Schillerstraße 44, 80336 Munich, Germany
| | - Sylvain Cantaloube
- Institut Curie, Centre de Recherche, Paris75248, France; CNRS, UMR3664, Paris75248, France; Equipe Labellisée Ligue Contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France
| | - Hitoshi Kurumizaka
- Laboratory of Structural Biology, Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
| | - Axel Imhof
- Histone Modifications Group, Scientific Coordinator ZfP (Zentrallabor für Proteinanalytik), Adolf Butenandt Institut, University of Munich, Schillerstraße 44, 80336 Munich, Germany
| | - Geneviève Almouzni
- Institut Curie, Centre de Recherche, Paris75248, France; CNRS, UMR3664, Paris75248, France; Equipe Labellisée Ligue Contre le Cancer, UMR3664, Paris 75248, France; UPMC, UMR3664, Paris 75248, France.
| |
Collapse
|
12
|
Jobin-Robitaille O, Billon P, Buisson R, Côté V, Niu H, Lacoste N, Sung P, Kron S, Masson JY, Côté J. Phospho-dependent recruitment of NuA4 by MRX at DNA breaks regulates RPA dynamics during resection. Epigenetics Chromatin 2013. [PMCID: PMC3600704 DOI: 10.1186/1756-8935-6-s1-p93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
13
|
Szenker E, Lacoste N, Almouzni G. A developmental requirement for HIRA-dependent H3.3 deposition revealed at gastrulation in Xenopus. Cell Rep 2012; 1:730-40. [PMID: 22813747 DOI: 10.1016/j.celrep.2012.05.006] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 03/21/2012] [Accepted: 05/07/2012] [Indexed: 01/09/2023] Open
Abstract
Discovering how histone variants that mark distinct chromatin regions affect a developmental program is a major challenge in the epigenetics field. To assess the importance of the H3.3 histone variant and its dedicated histone chaperone HIRA, we used an established developmental model, Xenopus laevis. After the early rapid divisions exploiting a large maternal pool of both replicative H3.2 and replacement H3.3, H3.3 transcripts show a distinct peak of expression at gastrulation. Depletion of both H3.2 and H3.3 leads to an early gastrulation arrest. However, with only H3.3 depletion, defects occur at late gastrulation, impairing further development. Providing exogenous H3.3 mRNAs, but not replicative H3.2 mRNAs, rescues these defects. Notably, downregulation of the H3.3 histone chaperone HIRA similarly impairs late gastrulation, and we find a global defect in H3.3 incorporation into chromatin comparable to H3.3 depletion. We discuss how specific HIRA-dependent H3.3 deposition is required for chromatin dynamics during gastrulation.
Collapse
|
14
|
Ray-Gallet D, Woolfe A, Vassias I, Pellentz C, Lacoste N, Puri A, Schultz DC, Pchelintsev NA, Adams PD, Jansen LET, Almouzni G. Dynamics of histone H3 deposition in vivo reveal a nucleosome gap-filling mechanism for H3.3 to maintain chromatin integrity. Mol Cell 2012; 44:928-41. [PMID: 22195966 DOI: 10.1016/j.molcel.2011.12.006] [Citation(s) in RCA: 280] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 11/15/2011] [Accepted: 12/06/2011] [Indexed: 01/21/2023]
Abstract
Establishment of a proper chromatin landscape is central to genome function. Here, we explain H3 variant distribution by specific targeting and dynamics of deposition involving the CAF-1 and HIRA histone chaperones. Impairing replicative H3.1 incorporation via CAF-1 enables an alternative H3.3 deposition at replication sites via HIRA. Conversely, the H3.3 incorporation throughout the cell cycle via HIRA cannot be replaced by H3.1. ChIP-seq analyses reveal correlation between HIRA-dependent H3.3 accumulation and RNA pol II at transcription sites and specific regulatory elements, further supported by their biochemical association. The HIRA complex shows unique DNA binding properties, and depletion of HIRA increases DNA sensitivity to nucleases. We propose that protective nucleosome gap filling of naked DNA by HIRA leads to a broad distribution of H3.3, and HIRA association with Pol II ensures local H3.3 enrichment at specific sites. We discuss the importance of this H3.3 deposition as a salvage pathway to maintain chromatin integrity.
Collapse
|
15
|
Altaf M, Auger A, Monnet-Saksouk J, Brodeur J, Piquet S, Cramet M, Bouchard N, Lacoste N, Utley RT, Gaudreau L, Côté J. NuA4-dependent acetylation of nucleosomal histones H4 and H2A directly stimulates incorporation of H2A.Z by the SWR1 complex. J Biol Chem 2010; 285:15966-77. [PMID: 20332092 DOI: 10.1074/jbc.m110.117069] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Structural and functional analyses of nucleosomes containing histone variant H2A.Z have drawn a lot of interest over the past few years. Important work in budding yeast has shown that H2A.Z (Htz1)-containing nucleosomes are specifically located on the promoter regions of genes, creating a specific chromatin structure that is poised for disassembly during transcription activation. The SWR1 complex is responsible for incorporation of Htz1 into nucleosomes through ATP-dependent exchange of canonical H2A-H2B dimers for Htz1-H2B dimers. Interestingly, the yeast SWR1 complex is functionally linked to the NuA4 acetyltransferase complex in vivo. NuA4 and SWR1 are physically associated in higher eukaryotes as they are homologous to the TIP60/p400 complex, which encompasses both histone acetyltransferase (Tip60) and histone exchange (p400/Domino) activities. Here we present work investigating the impact of NuA4-dependent acetylation on SWR1-driven incorporation of H2A.Z into chromatin. Using in vitro histone exchange assays with native chromatin, we demonstrate that prior chromatin acetylation by NuA4 greatly stimulates the exchange of H2A for H2A.Z. Interestingly, we find that acetylation of H2A or H4 N-terminal tails by NuA4 can independently stimulate SWR1 activity. Accordingly, we demonstrate that mutations of H4 or H2A N-terminal lysine residues have similar effects on H2A.Z incorporation in vivo, and cells carrying mutations in both tails are nonviable. Finally, depletion experiments indicate that the bromodomain-containing protein Bdf1 is important for NuA4-dependent stimulation of SWR1. These results provide important mechanistic insight into the functional cross-talk between chromatin acetylation and ATP-dependent exchange of histone H2A variants.
Collapse
Affiliation(s)
- Mohammed Altaf
- Laval University Cancer Research Center, Hôtel-Dieu de Québec, CHUQ, Quebec City, Quebec G1R 2J6, Canada
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Dunleavy EM, Roche D, Tagami H, Lacoste N, Ray-Gallet D, Nakamura Y, Daigo Y, Nakatani Y, Almouzni-Pettinotti G. HJURP is a cell-cycle-dependent maintenance and deposition factor of CENP-A at centromeres. Cell 2009; 137:485-97. [PMID: 19410545 DOI: 10.1016/j.cell.2009.02.040] [Citation(s) in RCA: 483] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 11/12/2008] [Accepted: 02/20/2009] [Indexed: 01/19/2023]
Abstract
The histone H3 variant CenH3, called CENP-A in humans, is central in centromeric chromatin to ensure proper chromosome segregation. In the absence of an underlying DNA sequence, it is still unclear how CENP-A deposition at centromeres is determined. Here, we purified non-nucleosomal CENP-A complexes to identify direct CENP-A partners involved in such a mechanism and identified HJURP. HJURP was not detected in H3.1- or H3.3-containing complexes, indicating its specificity for CENP-A. HJURP centromeric localization is cell cycle regulated, and its transient appearance at the centromere coincides precisely with the proposed time window for new CENP-A deposition. Furthermore, HJURP downregulation leads to a major reduction in CENP-A at centromeres and impairs deposition of newly synthesized CENP-A, causing mitotic defects. We conclude that HJURP is a key factor for CENP-A deposition and maintenance at centromeres.
Collapse
Affiliation(s)
- Elaine M Dunleavy
- Laboratory of Nuclear Dynamics and Genome Plasticity, UMR CNRS/Institut Curie, Paris, France
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Altaf M, Utley RT, Lacoste N, Tan S, Briggs SD, Côté J. Interplay of chromatin modifiers on a short basic patch of histone H4 tail defines the boundary of telomeric heterochromatin. Mol Cell 2008; 28:1002-14. [PMID: 18158898 DOI: 10.1016/j.molcel.2007.12.002] [Citation(s) in RCA: 161] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 10/30/2007] [Accepted: 12/05/2007] [Indexed: 01/16/2023]
Abstract
Dot1 (Disruptor of telomeric silencing-1) is a histone H3 lysine 79 methyltransferase that contributes to the establishment of heterochromatin boundary and has been linked to transcription elongation. We found that histone H4 N-terminal domain, unlike other histone tails, interacts with Dot1 and is essential for H3 K79 methylation. Furthermore, we show that the heterochromatin protein Sir3 inhibits Dot1-mediated methylation and that this inhibition is dependent on lysine 16 of H4. Sir3 and Dot1 bind the same short basic patch of histone H4 tail, and Sir3 also associates with the residues surrounding H3 K79 in a methylation-sensitive manner. Thus, Sir3 and Dot1 compete for the same molecular target on chromatin. ChIP analyses support a model in which acetylation of H4 lysine 16 displaces Sir3, allowing Dot1 to bind and methylate H3 lysine 79, which in turn further blocks Sir3 binding/spreading. This draws a detailed picture of the succession of molecular events occurring during the establishment of telomeric heterochromatin boundaries.
Collapse
Affiliation(s)
- Mohammed Altaf
- Laval University Cancer Research Center, Hôtel-Dieu de Québec, Centre Hospitalier Universitaire de Québec, 9 McMahon Street, Quebec City, QC G1R 2J6, Canada
| | | | | | | | | | | |
Collapse
|
18
|
Shi X, Hong T, Walter KL, Ewalt M, Michishita E, Hung T, Carney D, Peña P, Lan F, Kaadige MR, Lacoste N, Cayrou C, Davrazou F, Saha A, Cairns BR, Ayer DE, Kutateladze TG, Shi Y, Côté J, Chua KF, Gozani O. ING2 PHD domain links histone H3 lysine 4 methylation to active gene repression. Nature 2006; 442:96-9. [PMID: 16728974 PMCID: PMC3089773 DOI: 10.1038/nature04835] [Citation(s) in RCA: 705] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Accepted: 04/17/2006] [Indexed: 12/12/2022]
Abstract
Dynamic regulation of diverse nuclear processes is intimately linked to covalent modifications of chromatin. Much attention has focused on methylation at lysine 4 of histone H3 (H3K4), owing to its association with euchromatic genomic regions. H3K4 can be mono-, di- or tri-methylated. Trimethylated H3K4 (H3K4me3) is preferentially detected at active genes, and is proposed to promote gene expression through recognition by transcription-activating effector molecules. Here we identify a novel class of methylated H3K4 effector domains--the PHD domains of the ING (for inhibitor of growth) family of tumour suppressor proteins. The ING PHD domains are specific and highly robust binding modules for H3K4me3 and H3K4me2. ING2, a native subunit of a repressive mSin3a-HDAC1 histone deacetylase complex, binds with high affinity to the trimethylated species. In response to DNA damage, recognition of H3K4me3 by the ING2 PHD domain stabilizes the mSin3a-HDAC1 complex at the promoters of proliferation genes. This pathway constitutes a new mechanism by which H3K4me3 functions in active gene repression. Furthermore, ING2 modulates cellular responses to genotoxic insults, and these functions are critically dependent on ING2 interaction with H3K4me3. Together, our findings establish a pivotal role for trimethylation of H3K4 in gene repression and, potentially, tumour suppressor mechanisms.
Collapse
Affiliation(s)
- Xiaobing Shi
- Department of Biological Sciences, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Cote J, Allard S, Jobin‐Robitaille O, Fortin I, Auger A, Lacoste N, Utley RT, Bouchard N, Covic M, Altaf M. Dynamic chromatin modifications during repair of DNA double strand breaks. FASEB J 2006. [DOI: 10.1096/fasebj.20.5.a889-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jacques Cote
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Stéphane Allard
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Olivier Jobin‐Robitaille
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Israël Fortin
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Andréanne Auger
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Nicolas Lacoste
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Rhea T Utley
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Nathalie Bouchard
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Marcela Covic
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| | - Mohd Altaf
- Cancer Research CenterLaval UniversityHôtel‐Dieu de Québec (CHUQ), 9 McMahon StreetQuebec CityQuebecG1R 2J6Canada
| |
Collapse
|
20
|
Utley RT, Lacoste N, Jobin-Robitaille O, Allard S, Côté J. Regulation of NuA4 histone acetyltransferase activity in transcription and DNA repair by phosphorylation of histone H4. Mol Cell Biol 2005; 25:8179-90. [PMID: 16135807 PMCID: PMC1234332 DOI: 10.1128/mcb.25.18.8179-8190.2005] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The NuA4 complex is a histone H4/H2A acetyltransferase involved in transcription and DNA repair. While histone acetylation is important in many processes, it has become increasingly clear that additional histone modifications also play a crucial interrelated role. To understand how NuA4 action is regulated, we tested various H4 tail peptides harboring known modifications in HAT assays. While dimethylation at arginine 3 (R3M) had little effect on NuA4 activity, phosphorylation of serine 1 (S1P) strongly decreased the ability of the complex to acetylate H4 peptides. However, R3M in combination with S1P alleviates the repression of NuA4 activity. Chromatin from cells treated with DNA damage-inducing agents shows an increase in phosphorylation of serine 1 and a concomitant decrease in H4 acetylation. We found that casein kinase 2 phosphorylates histone H4 and associates with the Rpd3 deacetylase complex, demonstrating a physical connection between phosphorylation of serine 1 and unacetylated H4 tails. Chromatin immunoprecipitation experiments also link local phosphorylation of H4 with its deacetylation, during both transcription and DNA repair. Time course chromatin immunoprecipitation data support a model in which histone H4 phosphorylation occurs after NuA4 action during double-strand break repair at the step of chromatin restoration and deacetylation. These findings demonstrate that H4 phospho-serine 1 regulates chromatin acetylation by the NuA4 complex and that this process is important for normal gene expression and DNA repair.
Collapse
Affiliation(s)
- Rhea T Utley
- Laval University Cancer Research Center, Hôtel-Dieu de Québec (CHUQ), 9 McMahon Street, Quebec City, QC, Canada G1R 2J6
| | | | | | | | | |
Collapse
|
21
|
Abstract
It has become clear that post-translational modifications of histones are key players in the mechanisms of transcriptional regulation. There are 4 major types of histone modifications: acetylation, methylation, phosphorylation and ubiquitinylation. Different combinations of these modifications would form an epigenetic code which, once read by specific protein domains, would lead to diverse responses at precise locations within the eukaryotic genome.
Collapse
Affiliation(s)
- Nicolas Lacoste
- Centre de recherche en cancérologie de l'Université Laval, Hôtel-Dieu de Québec (CHUQ), 9, rue McMahon, Québec, G1R 2J6, Canada
| | | |
Collapse
|
22
|
Boudreault AA, Cronier D, Selleck W, Lacoste N, Utley RT, Allard S, Savard J, Lane WS, Tan S, Côté J. Yeast enhancer of polycomb defines global Esa1-dependent acetylation of chromatin. Genes Dev 2003; 17:1415-28. [PMID: 12782659 PMCID: PMC196073 DOI: 10.1101/gad.1056603] [Citation(s) in RCA: 174] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2002] [Accepted: 04/04/2003] [Indexed: 11/24/2022]
Abstract
Drosophila Enhancer of Polycomb, E(Pc), is a suppressor of position-effect variegation and an enhancer of both Polycomb and trithorax mutations. A homologous yeast protein, Epl1, is a subunit of the NuA4 histone acetyltransferase complex. Epl1 depletion causes cells to accumulate in G2/M and global loss of acetylated histones H4 and H2A. In relation to the Drosophila protein, mutation of Epl1 suppresses gene silencing by telomere position effect. Epl1 protein is found in the NuA4 complex and a novel highly active smaller complex named Piccolo NuA4 (picNuA4). The picNuA4 complex contains Esa1, Epl1, and Yng2 as subunits and strongly prefers chromatin over free histones as substrate. Epl1 conserved N-terminal domain bridges Esa1 and Yng2 together, stimulating Esa1 catalytic activity and enabling acetylation of chromatin substrates. A recombinant picNuA4 complex shows characteristics similar to the native complex, including strong chromatin preference. Cells expressing only the N-terminal half of Epl1 lack NuA4 HAT activity, but possess picNuA4 complex and activity. These results indicate that the essential aspect of Esa1 and Epl1 resides in picNuA4 function. We propose that picNuA4 represents a nontargeted histone H4/H2A acetyltransferase activity responsible for global acetylation, whereas the NuA4 complex is recruited to specific genomic loci to perturb locally the dynamic acetylation/deacetylation equilibrium.
Collapse
Affiliation(s)
- Alexandre A Boudreault
- Laval University Cancer Research Center, Hôtel-Dieu de Québec (CHUQ), Quebec City, Qc G1R 2J6 Canada
| | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Abstract
Yeast disruptor of telomeric silencing-1 (DOT1) is involved in gene silencing and in the pachytene checkpoint during meiotic cell cycle. Here we show that the Dot1 protein possesses intrinsic histone methyltransferase (HMT) activity. When compared with Rmt1, another putative yeast HMT, Dot1 shows very distinct substrate specificity. While Rmt1 methylates histone H4, Dot1 targets histone H3. In contrast to Rmt1, which can only modify free histones, Dot1 activity is specific to nucleosomal substrates. This was also confirmed using native chromatin purified from yeast cells. We also demonstrate that, like its mammalian homolog PRMT1, Rmt1 specifically dimethylates an arginine residue at position 3 of histone H4 N-terminal tail. In surprising contrast, methylation by Dot1 occurs in the globular domain of nucleosomal histone H3. Matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) analysis suggests that H3 lysine 79 is trimethylated by Dot1. The intrinsic nucleosomal histone H3 methyltransferase activity of Dot1 is certainly a key aspect of its function in gene silencing at telomeres, most likely by directly modulating chromatin structure and Sir protein localization. In agreement with a role in regulating localization of histone deacetylase complexes like SIR, an increase of bulk histone acetylation is detected in dot1- cells.
Collapse
Affiliation(s)
- Nicolas Lacoste
- Laval University Cancer Research Center, Hôtel-Dieu de Québec (CHUQ), 9 McMahon Street, Quebec City, Quebec G1R 2J6, Canada
| | | | | | | | | |
Collapse
|
24
|
Marraccini P, Rogers WJ, Allard C, André ML, Caillet V, Lacoste N, Lausanne F, Michaux S. Molecular and biochemical characterization of endo-beta-mannanases from germinating coffee (Coffea arabica) grains. Planta 2001; 213:296-308. [PMID: 11469596 DOI: 10.1007/s004250100541] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The activity of endo-beta-mannanase ([1-->4]-beta-mannan endohydrolase EC 3.2.1.78) is likely to be central to the metabolism of cell wall mannans during the germination of grains of coffee (Coffea spp.). In the present paper, we report the cloning and sequencing of two endo-beta-mannanase cDNAs (manA and manB) by different strategies from Coffea arabica L.. The manA cDNA was obtained by the use of oligonucleotides homologous to published sequences of other endo-beta-mannanases and manB by the use of oligonucleotides deduced from a purified enzyme from coffee. ManA and B proteins share about 56% sequence homology and include highly conserved regions found in other mannan endohydrolases. Purification of the activity by chromatography followed by separation by two-dimensional electrophoresis and amino acid sequencing demonstrated the existence of at least seven isomers of the ManB form. The existence of multiple manB genes was also indicated by Southern analysis, whereas only one or two gene copies were detected for manA. Northern hybridizations with manA- and manB-specific probes showed that mRNA transcripts for both cDNAs were present at the same periods of bean germination with transcript peaks at 20 days after imbibition of water (DAI). Transcripts were not detected during grain maturation or in the other tissues such as roots, stems, flowers and leaves. The peak endo-beta-mannanase activity occurred at approximately 28 DAI and was not detected in grains prior to imbibition. Activity and mRNA levels appeared to be tightly co-ordinated. Tests of substrate specificity with the purified ManB enzyme showed that activity required a minimum of five mannose units to function efficiently.
Collapse
Affiliation(s)
- P Marraccini
- Department of Plant Science, Nestlé Research Centre, Tours, France.
| | | | | | | | | | | | | | | |
Collapse
|