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Morlino S, Vaccaro L, Leone MP, Nardella G, Bisceglia L, Ortore RP, Verzicco G, Cassano L, Castori M, Cacchiarelli D, Micale L. Combined exome and whole transcriptome sequencing identifies a de novo intronic SRCAP variant causing DEHMBA syndrome with severe sleep disorder. J Hum Genet 2024; 69:287-290. [PMID: 38448605 DOI: 10.1038/s10038-024-01240-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 02/09/2024] [Accepted: 02/27/2024] [Indexed: 03/08/2024]
Abstract
Rare heterozygous variants in exons 33-34 of the SRCAP gene are associated with Floating-Harbor syndrome and have a dominant-negative mechanism of action. At variance, heterozygous null alleles falling in other parts of the same gene cause developmental delay, hypotonia, musculoskeletal defects, and behavioral abnormalities (DEHMBA) syndrome. We report an 18-year-old man with DEHMBA syndrome and obstructive sleep apnea, who underwent exome sequencing (ES) and whole transcriptome sequencing (WTS) on peripheral blood. Trio analysis prioritized the de novo heterozygous c.5658+5 G > A variant. WTS promptly demostrated four different abnormal transcripts affecting >40% of the reads, three of which leading to a frameshift. This study demonstrated the efficacy of a combined ES-WTS approach in solving undiagnosed cases. We also speculated that sleep respiratory disorder may be an underdiagnosed complication of DEHMBA syndrome.
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Affiliation(s)
- Silvia Morlino
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy
| | - Lorenzo Vaccaro
- Armenise/Harvard Laboratory of Integrative Genomics, Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Translational Medicine, University of Naples "Federico II", Naples, Italy
| | - Maria Pia Leone
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy
| | - Grazia Nardella
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy
| | - Luigi Bisceglia
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy
| | - Rocco Pio Ortore
- Division of Maxillofacial Surgery and Otolaryngology, Fondazione IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013, Foggia, Italy
| | - Giannandrea Verzicco
- Division of Maxillofacial Surgery and Otolaryngology, Fondazione IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013, Foggia, Italy
| | - Lazzaro Cassano
- Division of Maxillofacial Surgery and Otolaryngology, Fondazione IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo, 71013, Foggia, Italy
| | - Marco Castori
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy.
| | - Davide Cacchiarelli
- Armenise/Harvard Laboratory of Integrative Genomics, Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Translational Medicine, University of Naples "Federico II", Naples, Italy
- Genomics and Experimental Medicine Program, Scuola Superiore Meridionale, Naples, Italy
| | - Lucia Micale
- Division of Medical Genetics, Fondazione IRCCS-Casa Sollievo della Sofferenza, Viale Cappuccini snc, 71013, San Giovanni Rotondo, Foggia, Italy
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Yu J, Sui F, Gu F, Li W, Yu Z, Wang Q, He S, Wang L, Xu Y. Structural insights into histone exchange by human SRCAP complex. Cell Discov 2024; 10:15. [PMID: 38331872 PMCID: PMC10853557 DOI: 10.1038/s41421-023-00640-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 12/18/2023] [Indexed: 02/10/2024] Open
Abstract
Histone variant H2A.Z is found at promoters and regulates transcription. The ATP-dependent chromatin remodeler SRCAP complex (SRCAP-C) promotes the replacement of canonical histone H2A-H2B dimer with H2A.Z-H2B dimer. Here, we determined structures of human SRCAP-C bound to H2A-containing nucleosome at near-atomic resolution. The SRCAP subunit integrates a 6-subunit actin-related protein (ARP) module and an ATPase-containing motor module. The ATPase-associated ARP module encircles half of the nucleosome along the DNA and may restrain net DNA translocation, a unique feature of SRCAP-C. The motor module adopts distinct nucleosome binding modes in the apo (nucleotide-free), ADP-bound, and ADP-BeFx-bound states, suggesting that ATPase-driven movement destabilizes H2A-H2B by unwrapping the entry DNA and pulls H2A-H2B out of nucleosome through the ZNHIT1 subunit. Structure-guided chromatin immunoprecipitation sequencing analysis confirmed the requirement of H2A-contacting ZNHIT1 in maintaining H2A.Z occupancy on the genome. Our study provides structural insights into the mechanism of H2A-H2A.Z exchange mediated by SRCAP-C.
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Affiliation(s)
- Jiali Yu
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
- The International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology of China, Department of Systems Biology for Medicine, School of Basic Medical Sciences, Shanghai Medical College of Fudan University, Shanghai, China
| | - Fengrui Sui
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Feng Gu
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Wanjun Li
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Zishuo Yu
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Qianmin Wang
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Shuang He
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China
| | - Li Wang
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China.
- Greater Bay Area Institute of Precision Medicine, Fudan University, Nansha District, Guangzhou, Guangdong, China.
| | - Yanhui Xu
- Fudan University Shanghai Cancer Center, Institutes of Biomedical Sciences, New Cornerstone Science Laboratory, State Key Laboratory of Genetic Engineering and Shanghai Key Laboratory of Medical Epigenetics, Shanghai Medical College of Fudan University, Shanghai, China.
- The International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology of China, Department of Systems Biology for Medicine, School of Basic Medical Sciences, Shanghai Medical College of Fudan University, Shanghai, China.
- Greater Bay Area Institute of Precision Medicine, Fudan University, Nansha District, Guangzhou, Guangdong, China.
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Fu MP, Merrill SM, Sharma M, Gibson WT, Turvey SE, Kobor MS. Rare diseases of epigenetic origin: Challenges and opportunities. Front Genet 2023; 14:1113086. [PMID: 36814905 PMCID: PMC9939656 DOI: 10.3389/fgene.2023.1113086] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/24/2023] [Indexed: 02/09/2023] Open
Abstract
Rare diseases (RDs), more than 80% of which have a genetic origin, collectively affect approximately 350 million people worldwide. Progress in next-generation sequencing technology has both greatly accelerated the pace of discovery of novel RDs and provided more accurate means for their diagnosis. RDs that are driven by altered epigenetic regulation with an underlying genetic basis are referred to as rare diseases of epigenetic origin (RDEOs). These diseases pose unique challenges in research, as they often show complex genetic and clinical heterogeneity arising from unknown gene-disease mechanisms. Furthermore, multiple other factors, including cell type and developmental time point, can confound attempts to deconvolute the pathophysiology of these disorders. These challenges are further exacerbated by factors that contribute to epigenetic variability and the difficulty of collecting sufficient participant numbers in human studies. However, new molecular and bioinformatics techniques will provide insight into how these disorders manifest over time. This review highlights recent studies addressing these challenges with innovative solutions. Further research will elucidate the mechanisms of action underlying unique RDEOs and facilitate the discovery of treatments and diagnostic biomarkers for screening, thereby improving health trajectories and clinical outcomes of affected patients.
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Affiliation(s)
- Maggie P. Fu
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada,Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Sarah M. Merrill
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada,Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Mehul Sharma
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada,Department of Pediatrics, Faculty of Medicine, BC Children’s Hospital, University of British Columbia, Vancouver, BC, Canada
| | - William T. Gibson
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Stuart E. Turvey
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada,Department of Pediatrics, Faculty of Medicine, BC Children’s Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Michael S. Kobor
- Department of Medical Genetics, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada,Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada,BC Children’s Hospital Research Institute, Vancouver, BC, Canada,*Correspondence: Michael S. Kobor,
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Messina G, Prozzillo Y, Delle Monache F, Santopietro MV, Atterrato MT, Dimitri P. The ATPase SRCAP is associated with the mitotic apparatus, uncovering novel molecular aspects of Floating-Harbor syndrome. BMC Biol 2021; 19:184. [PMID: 34474679 PMCID: PMC8414691 DOI: 10.1186/s12915-021-01109-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 07/22/2021] [Indexed: 11/10/2022] Open
Abstract
Background A variety of human genetic diseases is known to be caused by mutations in genes encoding chromatin factors and epigenetic regulators, such as DNA or histone modifying enzymes and members of ATP-dependent chromatin remodeling complexes. Floating-Harbor syndrome is a rare genetic disease affecting human development caused by dominant truncating mutations in the SRCAP gene, which encodes the ATPase SRCAP, the core catalytic subunit of the homonymous chromatin-remodeling complex. The main function of the SRCAP complex is to promote the exchange of histone H2A with the H2A.Z variant. According to the canonical role played by the SRCAP protein in epigenetic regulation, the Floating-Harbor syndrome is thought to be a consequence of chromatin perturbations. However, additional potential physiological functions of SRCAP have not been sufficiently explored. Results We combined cell biology, reverse genetics, and biochemical approaches to study the subcellular localization of the SRCAP protein and assess its involvement in cell cycle progression in HeLa cells. Surprisingly, we found that SRCAP associates with components of the mitotic apparatus (centrosomes, spindle, midbody), interacts with a plethora of cytokinesis regulators, and positively regulates their recruitment to the midbody. Remarkably, SRCAP depletion perturbs both mitosis and cytokinesis. Similarly, DOM-A, the functional SRCAP orthologue in Drosophila melanogaster, is found at centrosomes and the midbody in Drosophila cells, and its depletion similarly affects both mitosis and cytokinesis. Conclusions Our findings provide first evidence suggesting that SRCAP plays previously undetected and evolutionarily conserved roles in cell division, independent of its functions in chromatin regulation. SRCAP may participate in two different steps of cell division: by ensuring proper chromosome segregation during mitosis and midbody function during cytokinesis. Moreover, our findings emphasize a surprising scenario whereby alterations in cell division produced by SRCAP mutations may contribute to the onset of Floating-Harbor syndrome. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01109-x.
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Affiliation(s)
- Giovanni Messina
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy. .,Istituto Pasteur Italia Fondazione Cenci-Bolognetti, Viale Regina Elena, 291, 00161, Roma, Italy.
| | - Yuri Prozzillo
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy
| | - Francesca Delle Monache
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy
| | - Maria Virginia Santopietro
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy
| | - Maria Teresa Atterrato
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy
| | - Patrizio Dimitri
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Via dei Sardi, 70, Roma, Italy.
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Prozzillo Y, Delle Monache F, Ferreri D, Cuticone S, Dimitri P, Messina G. The True Story of Yeti, the "Abominable" Heterochromatic Gene of Drosophila melanogaster. Front Physiol 2019; 10:1093. [PMID: 31507454 PMCID: PMC6713933 DOI: 10.3389/fphys.2019.01093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 08/08/2019] [Indexed: 12/21/2022] Open
Abstract
The Drosophila Yeti gene (CG40218) was originally identified by recessive lethal mutation and subsequently mapped to the deep pericentromeric heterochromatin of chromosome 2. Functional studies have shown that Yeti encodes a 241 amino acid protein called YETI belonging to the evolutionarily conserved family of Bucentaur (BCNT) proteins and exhibiting a widespread distribution in animals and plants. Later studies have demonstrated that YETI protein: (i) is able to bind both subunits of the microtubule-based motor kinesin-I; (ii) is required for proper chromosome organization in both mitosis and meiosis divisions; and more recently (iii) is a new subunit of dTip60 chromatin remodeling complex. To date, other functions of YETI counterparts in chicken (CENtromere Protein 29, CENP-29), mouse (Cranio Protein 27, CP27), zebrafish and human (CranioFacial Development Protein 1, CFDP1) have been reported in literature, but the fully understanding of the multifaceted molecular function of this protein family remains still unclear. In this review we comprehensively highlight recent work and provide a more extensive hypothesis suggesting a broader range of YETI protein functions in different cellular processes.
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Affiliation(s)
- Yuri Prozzillo
- Pasteur Institute of Italy, Fondazione Cenci Bolognetti, Rome, Italy.,"Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Francesca Delle Monache
- "Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Diego Ferreri
- Pasteur Institute of Italy, Fondazione Cenci Bolognetti, Rome, Italy.,"Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Stefano Cuticone
- Pasteur Institute of Italy, Fondazione Cenci Bolognetti, Rome, Italy.,"Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Patrizio Dimitri
- Pasteur Institute of Italy, Fondazione Cenci Bolognetti, Rome, Italy.,"Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Giovanni Messina
- Pasteur Institute of Italy, Fondazione Cenci Bolognetti, Rome, Italy.,"Charles Darwin" Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
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Zhang S, Chen S, Qin H, Yuan H, Pi Y, Yang Y, Huang H, Li G, Sun Y, Wang Z, Ma H, Fu X, Zhou T, Wang J, Zhang H, Shen Y. Novel genotypes and phenotypes among Chinese patients with Floating-Harbor syndrome. Orphanet J Rare Dis 2019; 14:144. [PMID: 31200758 PMCID: PMC6570847 DOI: 10.1186/s13023-019-1111-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 06/04/2019] [Indexed: 12/11/2022] Open
Abstract
Background Floating-Harbor syndrome (FHS) is a rare syndromic short stature disorder caused by truncating variants in SRCAP. Few Chinese FHS patients had been reported so far and limited knowledge regarding the benefit of growth hormone treatment existed. Methods We ascertained 12 short stature patients with molecularly confirmed diagnosis of FHS by whole exome sequencing. We performed a comprehensive clinical evaluation for all patients and assessed the responsiveness of growth hormone treatment in a subset of the patients. Results Five distinct pathogenic/likely pathogenic variants were identified in 12 independent FHS patients including two previously reported variants (c.7303C > T/p.Arg2435Ter and c.7330C > T/p.Arg2444Ter) and three novel variants (c.7189G > T/p.Glu2397Ter, c.7245_7246delAT/p.Ser2416ArgfsTer26 and c.7466C > G/p.Ser2489Ter). The c.7303C > T/p.Arg2435Ter mutation appears more common in Chinese FHS patients. The clinical presentations of Chinese FHS patients are very similar to those of previously reported patients of different ethnicities. Yet we noticed micropenis and ear abnormalities in multiple patients, suggesting that these may be novel phenotypes of Floating-Harbor syndrome. Eight patients (one with GH deficiency, one with undetermined GH level, six without GH deficiency) underwent growth hormone treatment, 3 patients had good responses, one with modest and two with poor responses. Conclusion We described novel genotypes and phenotypes in a Chinese FHS patient cohort. We showed that about half of FHS patients exhibited modest to good response to GH treatment regardless of their respective GH deficiency status. We didn’t find any correlation between different mutations and response to GH treatment. Electronic supplementary material The online version of this article (10.1186/s13023-019-1111-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shujie Zhang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, People's Republic of China.,Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530003, People's Republic of China
| | - Shaoke Chen
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530003, People's Republic of China
| | - Haisong Qin
- Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530003, People's Republic of China
| | - Haiming Yuan
- Dongguan Maternal and Child Health Care Hospital, Dongguan, 523120, People's Republic of China
| | - Yalei Pi
- Department of pediatrics, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, People's Republic of China
| | - Yu Yang
- Department of Endocrinology, Metabolism, and Genetics, Jiangxi Provincial Children's Hospital, Nanchang, 330006, People's Republic of China
| | - Hui Huang
- Department of Endocrinology, Metabolism, and Genetics, Jiangxi Provincial Children's Hospital, Nanchang, 330006, People's Republic of China
| | - Guimei Li
- Department of Pediatrics Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
| | - Yan Sun
- Department of Pediatrics Endocrinology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, People's Republic of China
| | - Zhihua Wang
- Department of Endocrinology, Genetics and Metabolism, Xi'an Children's Hospital Affiliated with the School of Medicine, Xi'an Jiaotong University, Xi'an, 710000, People's Republic of China
| | - Huamei Ma
- Department of Pediatrics, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510080, People's Republic of China
| | - Xiaoling Fu
- Department of Pediatrics, The Peoples Hospital of The Guizhou Province, Guiyang, 550002, People's Republic of China
| | - Ting Zhou
- Department of Endocrinology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Jian Wang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, People's Republic of China
| | - Huifeng Zhang
- Department of pediatrics, The Second Hospital of Hebei Medical University, Shijiazhuang, 050000, People's Republic of China.
| | - Yiping Shen
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200000, People's Republic of China. .,Department of Genetics and Metabolism, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530003, People's Republic of China. .,Boston Children's Hospital, Harvard Medical School, Boston, MA, 02115, USA.
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Ortmayr K, Dubuis S, Zampieri M. Metabolic profiling of cancer cells reveals genome-wide crosstalk between transcriptional regulators and metabolism. Nat Commun 2019; 10:1841. [PMID: 31015463 PMCID: PMC6478870 DOI: 10.1038/s41467-019-09695-9] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 03/22/2019] [Indexed: 12/20/2022] Open
Abstract
Transcriptional reprogramming of cellular metabolism is a hallmark of cancer. However, systematic approaches to study the role of transcriptional regulators (TRs) in mediating cancer metabolic rewiring are missing. Here, we chart a genome-scale map of TR-metabolite associations in human cells using a combined computational-experimental framework for large-scale metabolic profiling of adherent cell lines. By integrating intracellular metabolic profiles of 54 cancer cell lines with transcriptomic and proteomic data, we unraveled a large space of associations between TRs and metabolic pathways. We found a global regulatory signature coordinating glucose- and one-carbon metabolism, suggesting that regulation of carbon metabolism in cancer may be more diverse and flexible than previously appreciated. Here, we demonstrate how this TR-metabolite map can serve as a resource to predict TRs potentially responsible for metabolic transformation in patient-derived tumor samples, opening new opportunities in understanding disease etiology, selecting therapeutic treatments and in designing modulators of cancer-related TRs. Aberrant gene expression in cancer coincides with drastic changes in metabolism. Here, the authors combined metabolome, transcriptome and proteome data in 54 cancer cell lines to uncover a genome-scale network of associations between transcriptional regulators and metabolites.
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Affiliation(s)
- Karin Ortmayr
- Institute of Molecular Systems Biology, ETH Zurich, Otto-Stern-Weg 3, CH-8093, Zurich, Switzerland
| | - Sébastien Dubuis
- Institute of Molecular Systems Biology, ETH Zurich, Otto-Stern-Weg 3, CH-8093, Zurich, Switzerland
| | - Mattia Zampieri
- Institute of Molecular Systems Biology, ETH Zurich, Otto-Stern-Weg 3, CH-8093, Zurich, Switzerland.
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Functional analysis of the cfdp1 gene in zebrafish provides evidence for its crucial role in craniofacial development and osteogenesis. Exp Cell Res 2017; 361:236-245. [PMID: 29107067 DOI: 10.1016/j.yexcr.2017.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/17/2017] [Accepted: 10/23/2017] [Indexed: 11/20/2022]
Abstract
The CFDP1 proteins have been linked to craniofacial development and osteogenesis in vertebrates, though specific human syndromes have not yet been identified. Alterations of craniofacial development represent the main cause of infant disability and mortality in humans. For this reason, it is crucial to understand the cellular functions and mechanism of action of the CFDP1 protein in model vertebrate organisms. Using a combination of genomic, molecular and cell biology approaches, we have performed a functional analysis of the cfdp1 gene and its encoded protein, zCFDP1, in the zebrafish model system. We found that zCFDP1 is present in the zygote, is rapidly produced after MTZ transition and is highly abundant in the head structures. Depletion of zCFDP1, induced by an ATG-blocking morpholino, produces considerable defects in craniofacial structures and bone mineralization. Together, our results show that zCFDP1 is an essential protein required for proper development and provide the first experimental evidence showing that in vertebrates it actively participates to the morphogenesis of craniofacial territories.
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Vardarajan BN, Tosto G, Lefort R, Yu L, Bennett DA, De Jager PL, Barral S, Reyes-Dumeyer D, Nagy PL, Lee JH, Cheng R, Medrano M, Lantigua R, Rogaeva E, St George-Hyslop P, Mayeux R. Ultra-rare mutations in SRCAP segregate in Caribbean Hispanic families with Alzheimer disease. Neurol Genet 2017; 3:e178. [PMID: 28852706 PMCID: PMC5570674 DOI: 10.1212/nxg.0000000000000178] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/29/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To identify rare coding variants segregating with late-onset Alzheimer disease (LOAD) in Caribbean Hispanic families. METHODS Whole-exome sequencing (WES) was completed in 110 individuals from 31 Caribbean Hispanic families without APOE ε4 homozygous carriers. Rare coding mutations segregating in families were subsequently genotyped in additional families and in an independent cohort of Caribbean Hispanic patients and controls. SRCAP messenger RNA (mRNA) expression was assessed in whole blood from mutation carriers with LOAD, noncarriers with LOAD, and healthy elderly controls, and also from autopsied brains in 2 clinical neuropathologic cohort studies of aging and dementia. RESULTS Ten ultra-rare missense mutations in the Snf2-related CREBBP, activator protein (SRCAP), were found in 12 unrelated families. Compared with the frequency in Caribbean Hispanic controls and the Latino population in the Exome Aggregation Consortium, the frequency of SRCAP mutations among Caribbean Hispanic patients with LOAD was significantly enriched (p = 1.19e-16). mRNA expression of SRCAP in whole blood was significantly lower in mutation carriers with LOAD, while the expression in whole blood and in the brain was significantly higher in nonmutation carriers with LOAD. Brain expression also correlated with clinical and neuropathologic endophenotypes. CONCLUSIONS WES in Caribbean Hispanic families with LOAD revealed ultra-rare missense mutations in SRCAP, a gene expressed in the brain and mutated in Floating-Harbor syndrome. SRCAP is a potent coactivator of the CREB-binding protein and a regulator of DNA damage response involving ATP-dependent chromatin remodeling. We hypothesize that increased expression in LOAD suggests a compensatory mechanism altered in mutation carriers.
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Affiliation(s)
- Badri N Vardarajan
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Giuseppe Tosto
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Roger Lefort
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Lei Yu
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - David A Bennett
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Philip L De Jager
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Sandra Barral
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Dolly Reyes-Dumeyer
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Peter L Nagy
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Joseph H Lee
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Rong Cheng
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Martin Medrano
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Rafael Lantigua
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Ekaterina Rogaeva
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Peter St George-Hyslop
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
| | - Richard Mayeux
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain (B.N.V., G.T., R. Lefort, P.L.D.J., S.B., D.R.-D., J.H.L., R.C., R. Lantigua, R.M.); Gertrude H. Sergievsky Center (B.N.V., G.T., S.B., D.R.-D., J.H.L., R.C., R.M.); Department of Neurology (P.L.D.J., S.B., R.M.), Department of Psychiatry (R.M.), Department of Systems Biology (B.N.V.), Department of Medicine (R. Lantigua), and Department of Pathology and Cell Biology (R. Lefort, P.L.N.), College of Physicians and Surgeons, Columbia University, New York Presbyterian Hospital; Department of Epidemiology (J.H.L., R.M.), School of Public Health, Columbia University, New York; Tanz Centre for Research in Neurodegenerative Diseases (E.R., P.S.G.-H.) and Department of Medicine (E.R., P.S.G.-H.), University of Toronto, Krembil Discovery Tower, ON, Canada; Department of Clinical Neurosciences (P.S.G.-H.), Cambridge Institute for Medical Research, University of Cambridge, UK; Rush Alzheimer's Disease Center (L.Y., D.A.B.), Rush University Medical Center, Chicago, IL; Program in Medical and Population Genetics (P.L.D.J.), Broad Institute, Cambridge, MA; and School of Medicine (M.M.), Mother and Teacher Pontifical Catholic University, Santiago, Dominican Republic
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Messina G, Atterrato MT, Prozzillo Y, Piacentini L, Losada A, Dimitri P. The human Cranio Facial Development Protein 1 (Cfdp1) gene encodes a protein required for the maintenance of higher-order chromatin organization. Sci Rep 2017; 7:45022. [PMID: 28367969 PMCID: PMC5377257 DOI: 10.1038/srep45022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 02/20/2017] [Indexed: 12/26/2022] Open
Abstract
The human Cranio Facial Development Protein 1 (Cfdp1) gene maps to chromosome 16q22.2-q22.3 and encodes the CFDP1 protein, which belongs to the evolutionarily conserved Bucentaur (BCNT) family. Craniofacial malformations are developmental disorders of particular biomedical and clinical interest, because they represent the main cause of infant mortality and disability in humans, thus it is important to understand the cellular functions and mechanism of action of the CFDP1 protein. We have carried out a multi-disciplinary study, combining cell biology, reverse genetics and biochemistry, to provide the first in vivo characterization of CFDP1 protein functions in human cells. We show that CFDP1 binds to chromatin and interacts with subunits of the SRCAP chromatin remodeling complex. An RNAi-mediated depletion of CFDP1 in HeLa cells affects chromosome organization, SMC2 condensin recruitment and cell cycle progression. Our findings provide new insight into the chromatin functions and mechanisms of the CFDP1 protein and contribute to our understanding of the link between epigenetic regulation and the onset of human complex developmental disorders.
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Affiliation(s)
- Giovanni Messina
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti and Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Italy.,Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Roma, Italy
| | - Maria Teresa Atterrato
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti and Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Italy.,Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Roma, Italy
| | - Yuri Prozzillo
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti and Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Italy.,Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Roma, Italy
| | - Lucia Piacentini
- Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Roma, Italy
| | | | - Patrizio Dimitri
- Istituto Pasteur Italia-Fondazione Cenci Bolognetti and Dipartimento di Biologia e Biotecnologie "Charles Darwin", Sapienza Università di Roma, Italy.,Dipartimento di Biologia e Biotecnologie "Charles Darwin" Sapienza Università di Roma, Roma, Italy
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11
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Messina G, Atterrato MT, Dimitri P. When chromatin organisation floats astray: theSrcapgene and Floating–Harbor syndrome. J Med Genet 2016; 53:793-797. [DOI: 10.1136/jmedgenet-2016-103842] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 02/29/2016] [Accepted: 03/29/2016] [Indexed: 01/19/2023]
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Chen L, Zhang YH, Huang T, Cai YD. Identifying novel protein phenotype annotations by hybridizing protein-protein interactions and protein sequence similarities. Mol Genet Genomics 2016; 291:913-34. [PMID: 26728152 DOI: 10.1007/s00438-015-1157-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 12/08/2015] [Indexed: 01/18/2023]
Abstract
Studies of protein phenotypes represent a central challenge of modern genetics in the post-genome era because effective and accurate investigation of protein phenotypes is one of the most critical procedures to identify functional biological processes in microscale, which involves the analysis of multifactorial traits and has greatly contributed to the development of modern biology in the post genome era. Therefore, we have developed a novel computational method that identifies novel proteins associated with certain phenotypes in yeast based on the protein-protein interaction network. Unlike some existing network-based computational methods that identify the phenotype of a query protein based on its direct neighbors in the local network, the proposed method identifies novel candidate proteins for a certain phenotype by considering all annotated proteins with this phenotype on the global network using a shortest path (SP) algorithm. The identified proteins are further filtered using both a permutation test and their interactions and sequence similarities to annotated proteins. We compared our method with another widely used method called random walk with restart (RWR). The biological functions of proteins for each phenotype identified by our SP method and the RWR method were analyzed and compared. The results confirmed a large proportion of our novel protein phenotype annotation, and the RWR method showed a higher false positive rate than the SP method. Our method is equally effective for the prediction of proteins involving in all the eleven clustered yeast phenotypes with a quite low false positive rate. Considering the universality and generalizability of our supporting materials and computing strategies, our method can further be applied to study other organisms and the new functions we predicted can provide pertinent instructions for the further experimental verifications.
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Affiliation(s)
- Lei Chen
- School of Life Sciences, Shanghai University, Shanghai, 200444, People's Republic of China. .,College of Information Engineering, Shanghai Maritime University, Shanghai, 201306, People's Republic of China.
| | - Yu-Hang Zhang
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200031, People's Republic of China
| | - Tao Huang
- Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200031, People's Republic of China
| | - Yu-Dong Cai
- School of Life Sciences, Shanghai University, Shanghai, 200444, People's Republic of China.
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Couthouis J, Raphael AR, Daneshjou R, Gitler AD. Targeted exon capture and sequencing in sporadic amyotrophic lateral sclerosis. PLoS Genet 2014; 10:e1004704. [PMID: 25299611 PMCID: PMC4191946 DOI: 10.1371/journal.pgen.1004704] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 08/25/2014] [Indexed: 12/11/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease that results in progressive degeneration of motor neurons, ultimately leading to paralysis and death. Approximately 10% of ALS cases are familial, with the remaining 90% of cases being sporadic. Genetic studies in familial cases of ALS have been extremely informative in determining the causative mutations behind ALS, especially as the same mutations identified in familial ALS can also cause sporadic disease. However, the cause of ALS in approximately 30% of familial cases and in the majority of sporadic cases remains unknown. Sporadic ALS cases represent an underutilized resource for genetic information about ALS; therefore, we undertook a targeted sequencing approach of 169 known and candidate ALS disease genes in 242 sporadic ALS cases and 129 matched controls to try to identify novel variants linked to ALS. We found a significant enrichment in novel and rare variants in cases versus controls, indicating that we are likely identifying disease associated mutations. This study highlights the utility of next generation sequencing techniques combined with functional studies and rare variant analysis tools to provide insight into the genetic etiology of a heterogeneous sporadic disease. Amyotrophic lateral sclerosis (ALS), also known as Charcot disease or Lou Gehrig's disease, is one of the most common neuromuscular diseases worldwide. This disease is characterized by a progressive degeneration of motor neurons, leading to patient death within a few years after onset. Despite the fact that most ALS cases are sporadic, most of the ALS genetic studies have focused on familial forms, leading to the genetic determination of cause for 70% of cases of familial ALS but for only 10% of sporadic ALS cases. This, coupled with the dearth of families available for study, suggests that researchers should begin tapping into the relatively untouched reservoir of available sporadic samples to identify novel genetic causes of sporadic ALS. Here we take advantage of high-throughput target sequencing techniques to test four different hypotheses about the genetic causes of ALS in sporadic ALS and uncover new candidate genes and pathways implicated in ALS.
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Affiliation(s)
- Julien Couthouis
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Alya R. Raphael
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Roxana Daneshjou
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
| | - Aaron D. Gitler
- Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
- * E-mail:
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Kolmus K, Van Troys M, Van Wesemael K, Ampe C, Haegeman G, Tavernier J, Gerlo S. β-agonists selectively modulate proinflammatory gene expression in skeletal muscle cells via non-canonical nuclear crosstalk mechanisms. PLoS One 2014; 9:e90649. [PMID: 24603712 PMCID: PMC3946252 DOI: 10.1371/journal.pone.0090649] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 02/04/2014] [Indexed: 02/04/2023] Open
Abstract
The proinflammatory cytokine Tumour Necrosis Factor (TNF)-α is implicated in a variety of skeletal muscle pathologies. Here, we have investigated how in vitro cotreatment of skeletal muscle C2C12 cells with β-agonists modulates the TNF-α-induced inflammatory program. We observed that C2C12 myotubes express functional TNF receptor 1 (TNF-R1) and β2-adrenoreceptors (β2-ARs). TNF-α activated the canonical Nuclear Factor-κB (NF-κB) pathway and Mitogen-Activated Protein Kinases (MAPKs), culminating in potent induction of NF-κB-dependent proinflammatory genes. Cotreatment with the β-agonist isoproterenol potentiated the expression of inflammatory mediators, including Interleukin-6 (IL-6) and several chemokines. The enhanced production of chemotactic factors upon TNF-α/isoproterenol cotreatment was also suggested by the results from migrational analysis. Whereas we could not explain our observations by cytoplasmic crosstalk, we found that TNF-R1-and β2-AR-induced signalling cascades cooperate in the nucleus. Using the IL-6 promoter as a model, we demonstrated that TNF-α/isoproterenol cotreatment provoked phosphorylation of histone H3 at serine 10, concomitant with enhanced promoter accessibility and recruitment of the NF-κB p65 subunit, cAMP-response element-binding protein (CREB), CREB-binding protein (CBP) and RNA polymerase II. In summary, we show that β-agonists potentiate TNF-α action, via nuclear crosstalk, that promotes chromatin relaxation at selected gene promoters. Our data warrant further study into the mode of action of β-agonists and urge for caution in their use as therapeutic agents for muscular disorders.
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Affiliation(s)
- Krzysztof Kolmus
- Department of Medical Protein Research, VIB, Gent, Belgium
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium
| | - Marleen Van Troys
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium
| | | | - Christophe Ampe
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium
| | - Guy Haegeman
- Department of Physiology, Faculty of Sciences, Ghent University, Gent, Belgium
| | - Jan Tavernier
- Department of Medical Protein Research, VIB, Gent, Belgium
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium
| | - Sarah Gerlo
- Department of Medical Protein Research, VIB, Gent, Belgium
- Department of Biochemistry, Faculty of Medicine and Health Sciences, Ghent University, Gent, Belgium
- * E-mail:
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15
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Nagasaki K, Asami T, Sato H, Ogawa Y, Kikuchi T, Saitoh A, Ogata T, Fukami M. Long-term follow-up study for a patient with Floating-Harbor syndrome due to a hotspot SRCAP mutation. Am J Med Genet A 2013; 164A:731-5. [PMID: 24375913 DOI: 10.1002/ajmg.a.36314] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 09/09/2013] [Indexed: 11/09/2022]
Abstract
Floating-Harbor syndrome (FHS) is a rare autosomal dominant disorder characterized by short stature, skeletal malformations, speech delay, and dysmorphic facial appearance. Recently, mutations in SRCAP encoding a coactivator for cAMP-response element binding protein (CREB)-binding protein have been identified in small number of patients with FHS. Here, we report on long-term follow-up data of a male patient with a SRCAP mutation. The patient presented with mild hypothyroidism and renal hypouricemia, in addition to several FHS-compatible features including growth impairment, cognitive disability, facial dysmorphisms, and hypertension. He showed delayed bone age from infancy to 9 years of age and markedly accelerated bone age with the formation of cone-shaped epiphyses and early epiphysial fusions after the onset of puberty. His pubertal sexual development was almost age appropriate. Two-year treatment with growth hormone (GH) did not significantly improve the growth velocity. Molecular analysis identified a de novo heterozygous nonsense mutation (p.R2444X) in the last exon of SRCAP, which has been most common mutation detected in patients from other ethnic groups. These results indicate that perturbed skeletal maturation from infancy through adolescence is a characteristic feature in patients with SRCAP mutations. Furthermore, our data imply that GH therapy exerted only a marginal effect on the growth of this patient, and that renal hypouricemia may be a novel complication of FHS.
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Affiliation(s)
- Keisuke Nagasaki
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan; Division of Pediatrics, Department of Homeostatic Regulation and Development, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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16
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Chesi A, Staahl BT, Jovicic A, Couthouis J, Fasolino M, Raphael AR, Yamazaki T, Elias L, Polak M, Kelly C, Williams KL, Fifita JA, Maragakis NJ, Nicholson GA, King OD, Reed R, Crabtree GR, Blair IP, Glass JD, Gitler AD. Exome sequencing to identify de novo mutations in sporadic ALS trios. Nat Neurosci 2013; 16:851-5. [PMID: 23708140 PMCID: PMC3709464 DOI: 10.1038/nn.3412] [Citation(s) in RCA: 122] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 05/01/2013] [Indexed: 12/12/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease whose causes are still poorly understood. To identify additional genetic risk factors, we assessed the role of de novo mutations in ALS by sequencing the exomes of 47 ALS patients and both of their unaffected parents (n = 141 exomes). We found that amino acid-altering de novo mutations were enriched in genes encoding chromatin regulators, including the neuronal chromatin remodeling complex (nBAF) component SS18L1 (also known as CREST). CREST mutations inhibited activity-dependent neurite outgrowth in primary neurons, and CREST associated with the ALS protein FUS. These findings expand our understanding of the ALS genetic landscape and provide a resource for future studies into the pathogenic mechanisms contributing to sporadic ALS.
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Affiliation(s)
- Alessandra Chesi
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
| | - Brett T. Staahl
- Howard Hughes Medical Institute and Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305
| | - Ana Jovicic
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
| | - Julien Couthouis
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
| | - Maria Fasolino
- Neuroscience Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104
| | - Alya R. Raphael
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
| | - Tomohiro Yamazaki
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115
| | - Laura Elias
- Howard Hughes Medical Institute and Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305
| | - Meraida Polak
- Department of Neurology, Emory University, Atlanta, GA 30322
| | - Crystal Kelly
- Department of Neurology, Emory University, Atlanta, GA 30322
| | - Kelly L. Williams
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, NSW, 2139, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
- Australian School of Advanced Medicine, Macquarie University, Sydney, NSW 2109, Australia
| | - Jennifer A. Fifita
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, NSW, 2139, Australia
- Australian School of Advanced Medicine, Macquarie University, Sydney, NSW 2109, Australia
| | - Nicholas J. Maragakis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Garth A. Nicholson
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, NSW, 2139, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
| | - Oliver D. King
- Department of Cell and Developmental Biology, University of Massachusetts Medical School, Worcester, MA 01655
| | - Robin Reed
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115
| | - Gerald R. Crabtree
- Howard Hughes Medical Institute and Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305
| | - Ian P. Blair
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, NSW, 2139, Australia
- Sydney Medical School, University of Sydney, Sydney, NSW, 2006, Australia
- Australian School of Advanced Medicine, Macquarie University, Sydney, NSW 2109, Australia
| | | | - Aaron D. Gitler
- Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305
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17
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Nikkel SM, Dauber A, de Munnik S, Connolly M, Hood RL, Caluseriu O, Hurst J, Kini U, Nowaczyk MJM, Afenjar A, Albrecht B, Allanson JE, Balestri P, Ben-Omran T, Brancati F, Cordeiro I, da Cunha BS, Delaney LA, Destrée A, Fitzpatrick D, Forzano F, Ghali N, Gillies G, Harwood K, Hendriks YMC, Héron D, Hoischen A, Honey EM, Hoefsloot LH, Ibrahim J, Jacob CM, Kant SG, Kim CA, Kirk EP, Knoers NVAM, Lacombe D, Lee C, Lo IFM, Lucas LS, Mari F, Mericq V, Moilanen JS, Møller ST, Moortgat S, Pilz DT, Pope K, Price S, Renieri A, Sá J, Schoots J, Silveira EL, Simon MEH, Slavotinek A, Temple IK, van der Burgt I, de Vries BBA, Weisfeld-Adams JD, Whiteford ML, Wierczorek D, Wit JM, Yee CFO, Beaulieu CL, White SM, Bulman DE, Bongers E, Brunner H, Feingold M, Boycott KM. The phenotype of Floating-Harbor syndrome: clinical characterization of 52 individuals with mutations in exon 34 of SRCAP. Orphanet J Rare Dis 2013; 8:63. [PMID: 23621943 PMCID: PMC3659005 DOI: 10.1186/1750-1172-8-63] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/16/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Floating-Harbor syndrome (FHS) is a rare condition characterized by short stature, delays in expressive language, and a distinctive facial appearance. Recently, heterozygous truncating mutations in SRCAP were determined to be disease-causing. With the availability of a DNA based confirmatory test, we set forth to define the clinical features of this syndrome. METHODS AND RESULTS Clinical information on fifty-two individuals with SRCAP mutations was collected using standardized questionnaires. Twenty-four males and twenty-eight females were studied with ages ranging from 2 to 52 years. The facial phenotype and expressive language impairments were defining features within the group. Height measurements were typically between minus two and minus four standard deviations, with occipitofrontal circumferences usually within the average range. Thirty-three of the subjects (63%) had at least one major anomaly requiring medical intervention. We did not observe any specific phenotype-genotype correlations. CONCLUSIONS This large cohort of individuals with molecularly confirmed FHS has allowed us to better delineate the clinical features of this rare but classic genetic syndrome, thereby facilitating the development of management protocols.
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Berdasco M, Esteller M. Genetic syndromes caused by mutations in epigenetic genes. Hum Genet 2013; 132:359-83. [PMID: 23370504 DOI: 10.1007/s00439-013-1271-x] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 01/18/2013] [Indexed: 12/21/2022]
Abstract
The orchestrated organization of epigenetic factors that control chromatin dynamism, including DNA methylation, histone marks, non-coding RNAs (ncRNAs) and chromatin-remodeling proteins, is essential for the proper function of tissue homeostasis, cell identity and development. Indeed, deregulation of epigenetic profiles has been described in several human pathologies, including complex diseases (such as cancer, cardiovascular and neurological diseases), metabolic pathologies (type 2 diabetes and obesity) and imprinting disorders. Over the last decade it has become increasingly clear that mutations of genes involved in epigenetic mechanism, such as DNA methyltransferases, methyl-binding domain proteins, histone deacetylases, histone methylases and members of the SWI/SNF family of chromatin remodelers are linked to human disorders, including Immunodeficiency Centromeric instability Facial syndrome 1, Rett syndrome, Rubinstein-Taybi syndrome, Sotos syndrome or alpha-thalassemia/mental retardation X-linked syndrome, among others. As new members of the epigenetic machinery are described, the number of human syndromes associated with epigenetic alterations increases. As recent examples, mutations of histone demethylases and members of the non-coding RNA machinery have recently been associated with Kabuki syndrome, Claes-Jensen X-linked mental retardation syndrome and Goiter syndrome. In this review, we describe the variety of germline mutations of epigenetic modifiers that are known to be associated with human disorders, and discuss the therapeutic potential of epigenetic drugs as palliative care strategies in the treatment of such disorders.
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Affiliation(s)
- María Berdasco
- Cancer Epigenetics Group, Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), 3rd Floor, Hospital Duran i Reynals, Av. Gran Via 199-203, 08908 L'Hospitalet de LLobregat, Barcelona, Catalonia, Spain
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19
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Hood R, Lines M, Nikkel S, Schwartzentruber J, Beaulieu C, Nowaczyk M, Allanson J, Kim C, Wieczorek D, Moilanen J, Lacombe D, Gillessen-Kaesbach G, Whiteford M, Quaio C, Gomy I, Bertola D, Albrecht B, Platzer K, McGillivray G, Zou R, McLeod D, Chudley A, Chodirker B, Marcadier J, Majewski J, Bulman D, White S, Boycott K, Boycott KM. Mutations in SRCAP, encoding SNF2-related CREBBP activator protein, cause Floating-Harbor syndrome. Am J Hum Genet 2012; 90:308-13. [PMID: 22265015 DOI: 10.1016/j.ajhg.2011.12.001] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 12/05/2011] [Accepted: 12/07/2011] [Indexed: 11/27/2022] Open
Abstract
Floating-Harbor syndrome (FHS) is a rare condition characterized by short stature, delayed osseous maturation, expressive-language deficits, and a distinctive facial appearance. Occurrence is generally sporadic, although parent-to-child transmission has been reported on occasion. Employing whole-exome sequencing, we identified heterozygous truncating mutations in SRCAP in five unrelated individuals with sporadic FHS. Sanger sequencing identified mutations in SRCAP in eight more affected persons. Mutations were de novo in all six instances in which parental DNA was available. SRCAP is an SNF2-related chromatin-remodeling factor that serves as a coactivator for CREB-binding protein (CREBBP, better known as CBP, the major cause of Rubinstein-Taybi syndrome [RTS]). Five SRCAP mutations, two of which are recurrent, were identified; all are tightly clustered within a small (111 codon) region of the final exon. These mutations are predicted to abolish three C-terminal AT-hook DNA-binding motifs while leaving the CBP-binding and ATPase domains intact. Our findings show that SRCAP mutations are the major cause of FHS and offer an explanation for the clinical overlap between FHS and RTS.
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20
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Iwai A, Takegami T, Shiozaki T, Miyazaki T. Hepatitis C virus NS3 protein can activate the Notch-signaling pathway through binding to a transcription factor, SRCAP. PLoS One 2011; 6:e20718. [PMID: 21673954 PMCID: PMC3108961 DOI: 10.1371/journal.pone.0020718] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 05/09/2011] [Indexed: 11/18/2022] Open
Abstract
Persistent infections of hepatitis C virus (HCV) are known to be a major risk factor for causing hepatocellular carcinomas. Nonstructural protein 3 (NS3) of HCV has serine protease and RNA helicase domains, and is essential for the viral replication. Further, NS3 is also considered to be involved in the development of HCV-induced hepatocellular carcinomas. In this report, we focus on the function of NS3 protein, and propose a novel possible molecular mechanism which is thought to be related to the tumorigenesis caused by the persistent infection of HCV. We identified SRCAP (Snf2-related CBP activator protein) as a NS3 binding protein using yeast two-hybrid screening, and a co-immunoprecipitation assay demonstrated that NS3 can bind to SRCAP in mammalian cells. The results of a reporter gene assay using Hes-1 promoter which is known to be a target gene activated by Notch, indicate that NS3 and SRCAP cooperatively activate the Hes-1 promoter in Hep3B cells. In addition, we show in this report that also p400, which is known as a protein closely resembling SRCAP, would be targeted by NS3. NS3 exhibited binding activity also to the 1449–1808 region of p400 by a co-immunoprecipitation assay, and further the activation of the Notch-mediated transcription of Hes-1 promoter by NS3 decreased significantly by the combined silencing of SRCAP and p400 mRNA using short hairpin RNA. These results suggest that the HCV NS3 protein is involved in the activation of the Notch-signaling pathway through the targeting to both SRCAP and p400.
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Affiliation(s)
- Atsushi Iwai
- Department of Bioresources, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, Japan
| | - Tsutomu Takegami
- Medical Research Institute, Kanazawa Medical University, Uchinada, Ishikawa, Japan
- * E-mail:
| | - Takuya Shiozaki
- Department of Bioresources, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, Japan
| | - Tadaaki Miyazaki
- Department of Bioresources, Hokkaido University Research Center for Zoonosis Control, Sapporo, Hokkaido, Japan
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21
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Loss of H2A.Z Is Not Sufficient to Determine Transcriptional Activity of Snf2-Related CBP Activator Protein or p400 Complexes. Int J Cell Biol 2011; 2011:715642. [PMID: 21785598 PMCID: PMC3140016 DOI: 10.1155/2011/715642] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Accepted: 04/01/2011] [Indexed: 12/04/2022] Open
Abstract
The p400 and SRCAP (Snf2-related CBP activator protein) complexes remodel chromatin by catalyzing deposition of histone H2A.Z into nucleosomes. This remodeling activity has been proposed as a basis for regulation of transcription by these complexes. Transcript levels of p21 or Sp1 mRNAs after knockdown of p400 or SRCAP reveals that each regulates transcription of these promoters differently. In this study, we asked whether deposition of H2A.Z within specific nucleosomes by p400 or SRCAP dictates transcriptional activity. Our data indicates that nucleosome density at specific p21 or Sp1 promoter positions is not altered by the loss of either remodeling complex. However, knockdown of SRCAP or p400 reduces deposition of H2A.Z∼50% into all p21 and Sp1 promoter nucleosomes. Thus, H2A.Z deposition is not targeted to specific nucleosomes. These results indicate that the deposition of H2A.Z by the p400 or SRCAP complexes is not sufficient to determine how each regulates transcription. This conclusion is further supported by studies that demonstrate a SRCAPΔATP
mutant unable to deposit H2A.Z has similar transcriptional activity as wild-type SRCAP.
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22
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Cai Y, Jin J, Gottschalk AJ, Yao T, Conaway JW, Conaway RC. Purification and assay of the human INO80 and SRCAP chromatin remodeling complexes. Methods 2007; 40:312-7. [PMID: 17101442 PMCID: PMC3092633 DOI: 10.1016/j.ymeth.2006.06.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Accepted: 06/27/2006] [Indexed: 02/06/2023] Open
Abstract
Chromatin modifying and remodeling enzymes play critical roles in many aspects of chromosome biology including transcription, replication, recombination, and repair. Our laboratory recently identified and characterized two multisubunit human chromatin remodeling enzymes designated the INO80 and SRCAP complexes. Mechanistic studies revealed that the human INO80 complex catalyzes nucleosome sliding and the SRCAP complex catalyzes ATP-dependent exchange of histone H2A/H2B dimers containing the histone variant H2A.Z into nucleosomes. Here we describe methods for purification and assay of the INO80 and SRCAP chromatin remodeling complexes.
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Affiliation(s)
- Yong Cai
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
| | - Jingji Jin
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
| | - Aaron J. Gottschalk
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
- Department of Biochemistry and Molecular Biology, Kansas University Medical Center, Kansas City, Kansas 66160
| | - Tingting Yao
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
| | - Joan W. Conaway
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
- Department of Biochemistry and Molecular Biology, Kansas University Medical Center, Kansas City, Kansas 66160
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73190
| | - Ronald C. Conaway
- Stowers Institute for Medical Research, Kansas City, Missouri 64110
- Department of Biochemistry and Molecular Biology, Kansas University Medical Center, Kansas City, Kansas 66160
- To whom correspondence should be addressed: Tel: 816-926-4092; Fax: 816-926-2092, E-mail:
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23
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Ruhl DD, Jin J, Cai Y, Swanson S, Florens L, Washburn MP, Conaway RC, Conaway JW, Chrivia JC. Purification of a human SRCAP complex that remodels chromatin by incorporating the histone variant H2A.Z into nucleosomes. Biochemistry 2006; 45:5671-7. [PMID: 16634648 DOI: 10.1021/bi060043d] [Citation(s) in RCA: 187] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The Snf-2-related CREB-binding protein activator protein (SRCAP) serves as a coactivator for a number of transcription factors known to interact with CBP. Swr1, the closest Saccharomyces cerevisiae ortholog of SRCAP, is a component of the chromatin remodeling complex SWR-C, which catalyzes exchange of the histone variant H2A.Z into nucleosomes. In this report, we use a combination of conventional chromatography and anti-SRCAP immunoaffinity chromatography to purify a native human SRCAP complex with a polypeptide composition similar to that of SWR-C, and we show for the first time that this SRCAP-containing complex supports ATP-dependent exchange of histone dimers containing H2B and H2A.Z into mononucleosomes reconstituted with recombinant H2A, H2B, H3, and H4. Our findings, together with previous evidence implicating H2A.Z in transcriptional regulation, suggest that SRCAP's coactivator function may depend on its ability to promote incorporation of H2A.Z into chromatin.
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Affiliation(s)
- Donald D Ruhl
- Department of Pharmacological and Physiological Science, Saint Louis University School of Medicine, Saint Louis, Missouri 63104, USA
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24
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Kasper LH, Fukuyama T, Biesen MA, Boussouar F, Tong C, de Pauw A, Murray PJ, van Deursen JMA, Brindle PK. Conditional knockout mice reveal distinct functions for the global transcriptional coactivators CBP and p300 in T-cell development. Mol Cell Biol 2006; 26:789-809. [PMID: 16428436 PMCID: PMC1347027 DOI: 10.1128/mcb.26.3.789-809.2006] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The global transcriptional coactivators CREB-binding protein (CBP) and the closely related p300 interact with over 312 proteins, making them among the most heavily connected hubs in the known mammalian protein-protein interactome. It is largely uncertain, however, if these interactions are important in specific cell lineages of adult animals, as homozygous null mutations in either CBP or p300 result in early embryonic lethality in mice. Here we describe a Cre/LoxP conditional p300 null allele (p300flox) that allows for the temporal and tissue-specific inactivation of p300. We used mice carrying p300flox and a CBP conditional knockout allele (CBPflox) in conjunction with an Lck-Cre transgene to delete CBP and p300 starting at the CD4- CD8- double-negative thymocyte stage of T-cell development. Loss of either p300 or CBP led to a decrease in CD4+ CD8+ double-positive thymocytes, but an increase in the percentage of CD8+ single-positive thymocytes seen in CBP mutant mice was not observed in p300 mutants. T cells completely lacking both CBP and p300 did not develop normally and were nonexistent or very rare in the periphery, however. T cells lacking CBP or p300 had reduced tumor necrosis factor alpha gene expression in response to phorbol ester and ionophore, while signal-responsive gene expression in CBP- or p300-deficient macrophages was largely intact. Thus, CBP and p300 each supply a surprising degree of redundant coactivation capacity in T cells and macrophages, although each gene has also unique properties in thymocyte development.
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Affiliation(s)
- Lawryn H Kasper
- Department of Biochemistry, St. Jude Children's Research Hospital, 332 N. Lauderdale, Memphis, TN 38105, USA
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25
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Eissenberg JC, Wong M, Chrivia JC. Human SRCAP and Drosophila melanogaster DOM are homologs that function in the notch signaling pathway. Mol Cell Biol 2005; 25:6559-69. [PMID: 16024792 PMCID: PMC1190335 DOI: 10.1128/mcb.25.15.6559-6569.2005] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The putative ATPase chromatin-remodeling machine SRCAP was identified in a yeast two-hybrid protein screen by interaction with the histone acetylase CBP. SRCAP is implicated in the transcriptional coactivation of cyclic AMP- and steroid-dependent promoters, but no natural chromosomal targets for SRCAP regulation have been identified. DOM is the unique SRCAP homolog in Drosophila melanogaster. The goal of this study was to test whether SRCAP is a functional homolog of DOM and to identify potential activities and targets of SRCAP in vivo. We show that human SRCAP complements recessive domino mutant phenotypes. This rescue depends on an intact ATPase homology domain. SRCAP colocalizes extensively with DOM on Drosophila polytene chromosomes and is recruited to sites of active transcription, such as steroid-regulated loci, but not to activated heat shock loci. We show that SRCAP recruits Drosophila CBP to ectopic chromosomal sites, providing the first evidence to suggest that SRCAP and CBP interact directly or indirectly on chromosomes. We show that DOM is a Notch pathway activator in Drosophila and that wild-type SRCAP-but not an ATPase domain mutant-can substitute for DOM in Notch-dependent wing development. We show that SRCAP potentiates Notch-dependent gene activation in HeLa cells. Taken together, these data implicate SRCAP and DOM in developmental gene activation.
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Affiliation(s)
- Joel C Eissenberg
- Saint Louis University School of Medicine, Edward A. Doisy Dept. of Biochemistry and Molecular Biology, 221 N. Grand Blvd., St. Louis, MO 63101, USA.
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Cai Y, Jin J, Florens L, Swanson SK, Kusch T, Li B, Workman JL, Washburn MP, Conaway RC, Conaway JW. The Mammalian YL1 Protein Is a Shared Subunit of the TRRAP/TIP60 Histone Acetyltransferase and SRCAP Complexes. J Biol Chem 2005; 280:13665-70. [PMID: 15647280 DOI: 10.1074/jbc.m500001200] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The multiprotein mammalian TRRAP/TIP60-containing histone acetyltransferase (HAT) complex performs critical functions in a variety of cellular processes including transcriptional activation, double strand DNA break repair, and apoptosis. We previously isolated the TRRAP/TIP60 complex from HeLa cells (Cai, Y., Jin, J., Tomomori-Sato, C., Sato, S., Sorokina, I., Parmely, T. J., Conaway, R. C., and Conaway, J. W. (2003) J. Biol. Chem. 278, 42733-42736). Analysis of proteins present in preparations of the TRRAP/TIP60 complex led to the identification of several new subunits, as well as several potential subunits including the YL1 protein. Here we present evidence that the YL1 protein is a previously unrecognized subunit of the TRRAP/TIP60 HAT complex. In addition, we present evidence that YL1 is also a component of a novel mammalian multiprotein complex that includes the SNF2-related helicase SRCAP and resembles the recently described Saccharomyces cerevisiae SWR1 chromatin remodeling complex. Taken together, our findings identify the YL1 protein as a new subunit of the TRRAP/TIP60 HAT complex, and they suggest that YL1 plays multiple roles in chromatin modification and remodeling in cells.
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Affiliation(s)
- Yong Cai
- Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA
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Nallani KC, Sullivan WJ. Identification of proteins interacting with Toxoplasma SRCAP by yeast two-hybrid screening. Parasitol Res 2005; 95:236-42. [PMID: 15729590 DOI: 10.1007/s00436-004-1291-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2004] [Accepted: 12/01/2004] [Indexed: 10/25/2022]
Abstract
Toxoplasma gondii is an opportunistic protozoan parasite that differentiates into latent cysts (bradyzoite) that can be reactivated during immunosuppression. TgSRCAP (Toxoplasma gondii Snf2-related CBP activator protein) is a SWI2/SNF2 family chromatin remodeler whose expression increases during cyst development. Identifying the proteins associating with TgSRCAP during the pre-cyst stage (tachyzoite) will increase our understanding of how parasite differentiation is initiated. We employed the yeast two-hybrid system to identify proteins that may interact directly with TgSRCAP. A stretch of 1,060 amino acids between ATPase subdomains IV and V of TgSRCAP was chosen as "bait" since the corresponding region in human SRCAP interacts with other proteins, including CREB binding protein. We have identified several novel parasite-specific transcription factors predicted to be in the T. gondii genome. Metabolic enzymes that may participate in cyst development were also identified as interacting with TgSRCAP.
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Affiliation(s)
- Karuna C Nallani
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Medical Sciences Building Room A-525, 635 Barnhill Drive, Indianapolis, IN 46202, USA
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Doyon Y, Selleck W, Lane WS, Tan S, Côté J. Structural and functional conservation of the NuA4 histone acetyltransferase complex from yeast to humans. Mol Cell Biol 2004; 24:1884-96. [PMID: 14966270 PMCID: PMC350560 DOI: 10.1128/mcb.24.5.1884-1896.2004] [Citation(s) in RCA: 451] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The NuA4 histone acetyltransferase (HAT) multisubunit complex is responsible for acetylation of histone H4 and H2A N-terminal tails in yeast. Its catalytic component, Esa1, is essential for cell cycle progression, gene-specific regulation and has been implicated in DNA repair. Almost all NuA4 subunits have clear homologues in higher eukaryotes, suggesting that the complex is conserved throughout evolution to metazoans. We demonstrate here that NuA4 complexes are indeed present in human cells. Tip60 and its splice variant Tip60b/PLIP were purified as stable HAT complexes associated with identical polypeptides, with 11 of the 12 proteins being homologs of yeast NuA4 subunits. This indicates a highly conserved subunit composition and the identified human proteins underline the role of NuA4 in the control of mammalian cell proliferation. ING3, a member of the ING family of growth regulators, links NuA4 to p53 function which we confirmed in vivo. Proteins specific to the human NuA4 complexes include ruvB-like helicases and a bromodomain-containing subunit linked to ligand-dependent transcription activation by the thyroid hormone receptor. We also demonstrate that subunits MRG15 and DMAP1 are present in distinct protein complexes harboring histone deacetylase and SWI2-related ATPase activities, respectively. Finally, analogous to yeast, a recombinant trimeric complex formed by Tip60, EPC1, and ING3 is sufficient to reconstitute robust nucleosomal HAT activity in vitro. In conclusion, the NuA4 HAT complex is highly conserved in eukaryotes, in which it plays primary roles in transcription, cellular response to DNA damage, and cell cycle control.
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Affiliation(s)
- Yannick Doyon
- Laval University Cancer Research Center, Hôtel-Dieu de Québec, Quebec City, Quebec G1R 2J6, Canada
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Rosendorff A, Illanes D, David G, Lin J, Kieff E, Johannsen E. EBNA3C coactivation with EBNA2 requires a SUMO homology domain. J Virol 2004; 78:367-77. [PMID: 14671118 PMCID: PMC303384 DOI: 10.1128/jvi.78.1.367-377.2004] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Epstein-Barr virus (EBV) nuclear antigen 3C (EBNA3C) is critical for EBV immortalization of infected B lymphocytes and can coactivate the EBV LMP1 promoter with EBNA2. EBNA3C amino acids 365 to 545 are necessary and sufficient for coactivation and are required for SUMO-1 and SUMO-3 interaction. We found that EBNA3C but not EBNA3CDelta343-545 colocalized with SUMO-1 in nuclear bodies and was modified by SUMO-2, SUMO-3, and SUMO-1. EBNA3C amino acids 545 to 628 and amino acids 30 to 365 were also required for EBNA3C sumolation and nuclear body localization but were dispensable for coactivation, indicating that EBNA3C sumolation is not required for coactivation. Furthermore, EBNA3C amino acids 476 to 992 potently coactivated with EBNA2 but EBNA3C amino acids 516 to 922 lacked activity, indicating that amino acids 476 to 515 are critical for coactivation. EBNA3C amino acids 476 to 515 include DDDVIEV(507-513), which are similar to SUMO-1 EEDVIEV(84-90). EBNA3C m1 and m2 point mutations, DDD(507-509) mutated to AAA and DVIEVID(509-513) mutated to AVIAVIA, respectively, diminished SUMO-1 and SUMO-3 interaction in directed yeast two-hybrid and glutathione S-transferase pulldown assays. Furthermore, EBNA3C m1 and m2 did not coactivate the LMP1 promoter with EBNA2. Overexpression of wild-type SUMO-1, SUMO-3, and the SUMO-conjugating enzyme UBC9 coactivated the LMP1 promoter with EBNA2. Since EBNA2 activation is dependent on p300/CBP, the possible effect of EBNA3C on p300-mediated transcription was assayed. EBNA3C potentiated transcription of p300 fused to a heterologous DNA binding domain, whereas EBNA3C m1 and m2 did not. All of these data are consistent with a model in which EBNA3C upregulates EBNA2-mediated gene activation by binding to a sumolated repressor and inhibiting repressive effects on p300/CBP and other transcription factor(s) at EBNA2-regulated promoters.
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Affiliation(s)
- Adam Rosendorff
- Virology Program and Department of Medicine, Channing Laboratory, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Monroy MA, Schott NM, Cox L, Chen JD, Ruh M, Chrivia JC. SNF2-related CBP activator protein (SRCAP) functions as a coactivator of steroid receptor-mediated transcription through synergistic interactions with CARM-1 and GRIP-1. Mol Endocrinol 2003; 17:2519-28. [PMID: 14500758 DOI: 10.1210/me.2003-0208] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
SRCAP (SNF2-related CBP activator protein) is a 350-kDa protein that shares homology with the SNF2 family of proteins whose members function in various aspects of transcriptional regulation. In various cell types, SRCAP is found in distinct multiprotein complexes that include proteins found in SWI/SNF chromatin remodeling complexes. SRCAP was identified by its ability to bind to CBP and was found to potentiate the ability of CBP to activate transcription. Studies in our laboratory have demonstrated that SRCAP functions as a coactivator for CREB-mediated transcription of a number of promoters, including that of the phosphoenolpyruvate carboxykinase gene. Our current studies demonstrate that SRCAP enhances phosphoenolpyruvate carboxykinase promoter transcription induced by glucocorticoids. SRCAP also enhances glucocorticoid receptor-mediated transcription of a simple promoter containing only two glucocorticoid response elements, indicating that SRCAP functions as a glucocorticoid receptor coactivator. In similar studies, SRCAP was also found to serve as a coactivator for the androgen receptor. SRCAP exhibits synergistic activation with nuclear receptor coactivators and functionally interacts in vivo with glucocorticoid receptor-interacting protein-1 and coactivator-associated arginine methyltransferase-1. We propose that SRCAP, by virtue of its ability to interact with CBP, functions as a coactivator to regulate transcription initiated by several signaling pathways.
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Affiliation(s)
- M Alexandra Monroy
- Department of Pharmacological and Physiological Science, St. Louis University School of Medicine, St. Louis, Missouri 63122, USA
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Xu X, Tarakanova V, Chrivia J, Yaciuk P. Adenovirus DNA binding protein inhibits SrCap-activated CBP and CREB-mediated transcription. Virology 2003; 313:615-21. [PMID: 12954226 DOI: 10.1016/s0042-6822(03)00386-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The SNF2-related CBP activator protein (SrCap) is a potent activator of transcription mediated by CBP and CREB. We have previously demonstrated that the Adenovirus 2 DNA Binding Protein (DBP) binds to SrCap and inhibits the transcription mediated by the carboxyl-terminal region of SrCap (amino acids 1275-2971). We report here that DBP inhibits the ability of full-length SrCap (1-2971) to activate transcription mediated by Gal-CREB and Gal-CBP. In addition, DBP also inhibits the ability of SrCap to enhance Protein Kinase A (PKA) activated transcription of the enkaphalin promoter. DBP was found to dramatically inhibit transcription of a mammalian two-hybrid system that was dependent on the interaction of SrCap and CBP binding domains. We also found that DBP has no effect on transcription mediated by a transcriptional activator that is not related to SrCap, indicating that our reported transcriptional inhibition is specific for SrCap and not due to nonspecific effects of DBP's DNA binding activity on the CAT reporter plasmid. Taken together, these results suggest a model in which DBP inhibits cellular transcription mediated by the interaction between SrCap and CBP.
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Affiliation(s)
- Xiequn Xu
- Department of Molecular Microbiology and Immunology, Saint Louis University Health Sciences Center, Saint Louis, MO 63104, USA
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Sullivan WJ, Monroy MA, Bohne W, Nallani KC, Chrivia J, Yaciuk P, Smith CK, Queener SF. Molecular cloning and characterization of an SRCAP chromatin remodeling homologue in Toxoplasma gondii. Parasitol Res 2003; 90:1-8. [PMID: 12743798 DOI: 10.1007/s00436-002-0814-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2002] [Accepted: 11/22/2002] [Indexed: 12/17/2022]
Abstract
We have identified and mapped a gene in Toxoplasma gondii that encodes a homologue of SRCAP (Snf2-related CBP activator protein), a member of the SNF/SWI family of chromatin remodeling factors. The genomic locus (TgSRCAP) is present as a single copy and contains 16 introns. The predicted cDNA contains an open reading frame of 8,775 bp and encodes a protein of 2,924 amino acids. We have identified additional SRCAP-like sequences in Apicomplexa for comparison by screening genomic databases. An analysis of SRCAP homologues between species reveals signature features that may be indicative of SRCAP members. Expression of mRNA encoding TgSRCAP is upregulated when tachyzoite (invasive form) parasites are induced to differentiate into bradyzoites (encysted form) in vitro. Recombinant TgSRCAP protein is functionally equivalent to the human homologue, being capable of increasing transcription mediated by CREB.
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Affiliation(s)
- William J Sullivan
- Department of Pharmacology and Toxicology, Room A-527, Indiana University School of Medicine, 635 Barnhill Drive, Indianapolis, IN 46202-5120, USA.
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Jurado LA, Song S, Roesler WJ, Park EA. Conserved amino acids within CCAAT enhancer-binding proteins (C/EBP(alpha) and beta) regulate phosphoenolpyruvate carboxykinase (PEPCK) gene expression. J Biol Chem 2002; 277:27606-12. [PMID: 11997389 DOI: 10.1074/jbc.m201429200] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Thyroid hormone and cAMP stimulate transcription of the gene for phosphoenolpyruvate carboxykinase (PEPCK). CCAAT enhancer-binding proteins (C/EBP(alpha) and beta) are involved in multiple aspects of the nutritional, developmental and hormonal regulation of PEPCK gene expression. Previously, we have identified a thyroid hormone response element in the PEPCK promoter and demonstrated that C/EBP proteins bound to the P3(I) site are participants in the induction of PEPCK gene expression by thyroid hormone and cAMP. Here, we identify several peptide regions within the transactivation domain of C/EBP(alpha) that enhance the ability of T(3) to stimulate gene transcription. We also demonstrate that several conserved amino acids in the transactivation domain of C/EBP(alpha) and C/EBPbeta are required for the stimulation of basal gene expression and identify amino acids within C/EBPbeta that participate in the cAMP induction of the PEPCK gene. Finally, we show that the CREB-binding protein (CBP) enhanced the induction of PEPCK gene transcription by thyroid hormone and that CBP is associated with the PEPCK gene in vivo. Our results indicate that both C/EBP proteins and CBP participate in the regulation of PEPCK gene transcription by thyroid hormone.
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Affiliation(s)
- Luis A Jurado
- Department of Pharmacology, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA
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