1
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Jang HS, Chen Y, Ge J, Wilkening AN, Hou Y, Lee HJ, Choi YR, Lowdon RF, Xing X, Li D, Kaufman CK, Johnson SL, Wang T. Epigenetic dynamics shaping melanophore and iridophore cell fate in zebrafish. Genome Biol 2021; 22:282. [PMID: 34607603 PMCID: PMC8489059 DOI: 10.1186/s13059-021-02493-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 09/09/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Zebrafish pigment cell differentiation provides an attractive model for studying cell fate progression as a neural crest progenitor engenders diverse cell types, including two morphologically distinct pigment cells: black melanophores and reflective iridophores. Nontrivial classical genetic and transcriptomic approaches have revealed essential molecular mechanisms and gene regulatory circuits that drive neural crest-derived cell fate decisions. However, how the epigenetic landscape contributes to pigment cell differentiation, especially in the context of iridophore cell fate, is poorly understood. RESULTS We chart the global changes in the epigenetic landscape, including DNA methylation and chromatin accessibility, during neural crest differentiation into melanophores and iridophores to identify epigenetic determinants shaping cell type-specific gene expression. Motif enrichment in the epigenetically dynamic regions reveals putative transcription factors that might be responsible for driving pigment cell identity. Through this effort, in the relatively uncharacterized iridophores, we validate alx4a as a necessary and sufficient transcription factor for iridophore differentiation and present evidence on alx4a's potential regulatory role in guanine synthesis pathway. CONCLUSIONS Pigment cell fate is marked by substantial DNA demethylation events coupled with dynamic chromatin accessibility to potentiate gene regulation through cis-regulatory control. Here, we provide a multi-omic resource for neural crest differentiation into melanophores and iridophores. This work led to the discovery and validation of iridophore-specific alx4a transcription factor.
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Affiliation(s)
- Hyo Sik Jang
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
- Present address: Department of Epigenetics, Van Andel Institute, Grand Rapids, MI USA
| | - Yujie Chen
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Jiaxin Ge
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Alicia N. Wilkening
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Yiran Hou
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Hyung Joo Lee
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - You Rim Choi
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Rebecca F. Lowdon
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Xiaoyun Xing
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Daofeng Li
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
| | - Charles K. Kaufman
- Department of Medicine, Division of Medical Oncology, and Department of Developmental Biology, Washington University in Saint Louis, St. Louis, MO USA
| | - Stephen L. Johnson
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
| | - Ting Wang
- Department of Genetics, Washington University School of Medicine, St Louis, MO USA
- The Edison Family Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO USA
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO USA
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2
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Zhang B, Kim MY, Elliot G, Zhou Y, Zhao G, Li D, Lowdon RF, Gormley M, Kapidzic M, Robinson JF, McMaster MT, Hong C, Mazor T, Hamilton E, Sears RL, Pehrsson EC, Marra MA, Jones SJM, Bilenky M, Hirst M, Wang T, Costello JF, Fisher SJ. Human placental cytotrophoblast epigenome dynamics over gestation and alterations in placental disease. Dev Cell 2021; 56:1238-1252.e5. [PMID: 33891899 DOI: 10.1016/j.devcel.2021.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/11/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
The human placenta and its specialized cytotrophoblasts rapidly develop, have a compressed lifespan, govern pregnancy outcomes, and program the offspring's health. Understanding the molecular underpinnings of these behaviors informs development and disease. Profiling the extraembryonic epigenome and transcriptome during the 2nd and 3rd trimesters revealed H3K9 trimethylation overlapping deeply DNA hypomethylated domains with reduced gene expression and compartment-specific patterns that illuminated their functions. Cytotrophoblast DNA methylation increased, and several key histone modifications decreased across the genome as pregnancy advanced. Cytotrophoblasts from severe preeclampsia had substantially increased H3K27 acetylation globally and at genes that are normally downregulated at term but upregulated in this syndrome. In addition, some cases had an immature pattern of H3K27ac peaks, and others showed evidence of accelerated aging, suggesting subtype-specific alterations in severe preeclampsia. Thus, the cytotrophoblast epigenome dramatically reprograms during pregnancy, placental disease is associated with failures in this process, and H3K27 hyperacetylation is a feature of severe preeclampsia.
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Affiliation(s)
- Bo Zhang
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA; Department of Developmental Biology, Center of Regenerative Medicine, Washington University School of Medicine, St Louis, MO 63108, USA
| | - M Yvonne Kim
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Brain Tumor Research Center, Department of Neurosurgery, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94115, USA
| | - GiNell Elliot
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Yan Zhou
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Division of Maternal-Fetal Medicine, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Guangfeng Zhao
- Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Daofeng Li
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Rebecca F Lowdon
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Matthew Gormley
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Division of Maternal-Fetal Medicine, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Mirhan Kapidzic
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Division of Maternal-Fetal Medicine, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Joshua F Robinson
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Division of Maternal-Fetal Medicine, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Michael T McMaster
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94122, USA
| | - Chibo Hong
- Brain Tumor Research Center, Department of Neurosurgery, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Tali Mazor
- Brain Tumor Research Center, Department of Neurosurgery, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Emily Hamilton
- Brain Tumor Research Center, Department of Neurosurgery, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94115, USA
| | - Renee L Sears
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Erica C Pehrsson
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Marco A Marra
- Centre for High-Throughput Biology, Department of Microbiology & Immunology, University of British Columbia, 2125 East Mall, Vancouver, BC V6T 1Z4, Canada; Canada's Michael Smith Genome Sciences Center, BC Cancer Agency, 675 West 10th Aven, Vancouver, BC V5Z 1L3, Canada
| | - Steven J M Jones
- Centre for High-Throughput Biology, Department of Microbiology & Immunology, University of British Columbia, 2125 East Mall, Vancouver, BC V6T 1Z4, Canada; Canada's Michael Smith Genome Sciences Center, BC Cancer Agency, 675 West 10th Aven, Vancouver, BC V5Z 1L3, Canada
| | - Misha Bilenky
- Centre for High-Throughput Biology, Department of Microbiology & Immunology, University of British Columbia, 2125 East Mall, Vancouver, BC V6T 1Z4, Canada; Canada's Michael Smith Genome Sciences Center, BC Cancer Agency, 675 West 10th Aven, Vancouver, BC V5Z 1L3, Canada
| | - Martin Hirst
- Centre for High-Throughput Biology, Department of Microbiology & Immunology, University of British Columbia, 2125 East Mall, Vancouver, BC V6T 1Z4, Canada; Canada's Michael Smith Genome Sciences Center, BC Cancer Agency, 675 West 10th Aven, Vancouver, BC V5Z 1L3, Canada
| | - Ting Wang
- Department of Genetics Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St Louis, MO 63108, USA.
| | - Joseph F Costello
- Brain Tumor Research Center, Department of Neurosurgery, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, CA 94115, USA.
| | - Susan J Fisher
- Ely and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94115, USA; Center for Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, CA 94115, USA; Division of Maternal-Fetal Medicine, University of California, San Francisco, San Francisco, CA 94115, USA; Department of Anatomy, University of California, San Francisco, San Francisco, CA 94122, USA.
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3
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Zhou J, Sears RL, Xing X, Zhang B, Li D, Rockweiler NB, Jang HS, Choudhary MNK, Lee HJ, Lowdon RF, Arand J, Tabers B, Gu CC, Cicero TJ, Wang T. Tissue-specific DNA methylation is conserved across human, mouse, and rat, and driven by primary sequence conservation. BMC Genomics 2017; 18:724. [PMID: 28899353 PMCID: PMC5596466 DOI: 10.1186/s12864-017-4115-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 09/04/2017] [Indexed: 12/15/2022] Open
Abstract
Background Uncovering mechanisms of epigenome evolution is an essential step towards understanding the evolution of different cellular phenotypes. While studies have confirmed DNA methylation as a conserved epigenetic mechanism in mammalian development, little is known about the conservation of tissue-specific genome-wide DNA methylation patterns. Results Using a comparative epigenomics approach, we identified and compared the tissue-specific DNA methylation patterns of rat against those of mouse and human across three shared tissue types. We confirmed that tissue-specific differentially methylated regions are strongly associated with tissue-specific regulatory elements. Comparisons between species revealed that at a minimum 11-37% of tissue-specific DNA methylation patterns are conserved, a phenomenon that we define as epigenetic conservation. Conserved DNA methylation is accompanied by conservation of other epigenetic marks including histone modifications. Although a significant amount of locus-specific methylation is epigenetically conserved, the majority of tissue-specific DNA methylation is not conserved across the species and tissue types that we investigated. Examination of the genetic underpinning of epigenetic conservation suggests that primary sequence conservation is a driving force behind epigenetic conservation. In contrast, evolutionary dynamics of tissue-specific DNA methylation are best explained by the maintenance or turnover of binding sites for important transcription factors. Conclusions Our study extends the limited literature of comparative epigenomics and suggests a new paradigm for epigenetic conservation without genetic conservation through analysis of transcription factor binding sites. Electronic supplementary material The online version of this article (10.1186/s12864-017-4115-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jia Zhou
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA.,Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - Renee L Sears
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Xiaoyun Xing
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Bo Zhang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Daofeng Li
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Nicole B Rockweiler
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Hyo Sik Jang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Mayank N K Choudhary
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Hyung Joo Lee
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Rebecca F Lowdon
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Jason Arand
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Brianne Tabers
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - C Charles Gu
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, USA
| | - Theodore J Cicero
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, USA
| | - Ting Wang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA.
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4
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Abstract
Evidence that noncoding mutation can result in cancer driver events is mounting. However, it is more difficult to assign molecular biological consequences to noncoding mutations than to coding mutations, and a typical cancer genome contains many more noncoding mutations than protein-coding mutations. Accordingly, parsing functional noncoding mutation signal from noise remains an important challenge. Here we use an empirical approach to identify putatively functional noncoding somatic single nucleotide variants (SNVs) from liver cancer genomes. Annotation of candidate variants by publicly available epigenome datasets finds that 40.5% of SNVs fall in regulatory elements. When assigned to specific regulatory elements, we find that the distribution of regulatory element mutation mirrors that of nonsynonymous coding mutation, where few regulatory elements are recurrently mutated in a patient population but many are singly mutated. We find potential gain-of-binding site events among candidate SNVs, suggesting a mechanism of action for these variants. When aggregating noncoding somatic mutation in promoters, we find that genes in the ERBB signaling and MAPK signaling pathways are significantly enriched for promoter mutations. Altogether, our results suggest that functional somatic SNVs in cancer are sporadic, but occasionally occur in regulatory elements and may affect phenotype by creating binding sites for transcriptional regulators. Accordingly, we propose that noncoding mutation should be formally accounted for when determining gene- and pathway-mutation burden in cancer.
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Affiliation(s)
- Rebecca F. Lowdon
- Center for Genome Sciences and Systems Biology, Department of Genetics, Washington University in St. Louis, Saint Louis, Missouri, United States of America
| | - Ting Wang
- Center for Genome Sciences and Systems Biology, Department of Genetics, Washington University in St. Louis, Saint Louis, Missouri, United States of America
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5
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Abstract
Empirical models of sequence evolution have spurred progress in the field of evolutionary genetics for decades. We are now realizing the importance and complexity of the eukaryotic epigenome. While epigenome analysis has been applied to genomes from single-cell eukaryotes to human, comparative analyses are still relatively few and computational algorithms to quantify epigenome evolution remain scarce. Accordingly, a quantitative model of epigenome evolution remains to be established. We review here the comparative epigenomics literature and synthesize its overarching themes. We also suggest one mechanism, transcription factor binding site (TFBS) turnover, which relates sequence evolution to epigenetic conservation or divergence. Lastly, we propose a framework for how the field can move forward to build a coherent quantitative model of epigenome evolution.
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Affiliation(s)
- Rebecca F Lowdon
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA.
| | - Hyo Sik Jang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA
| | - Ting Wang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO, USA.
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6
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Zhou X, Li D, Zhang B, Lowdon RF, Rockweiler NB, Sears RL, Madden PAF, Smirnov I, Costello JF, Wang T. Epigenomic annotation of genetic variants using the Roadmap Epigenome Browser. Nat Biotechnol 2015; 33:345-6. [PMID: 25690851 PMCID: PMC4467764 DOI: 10.1038/nbt.3158] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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7
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Yue F, Cheng Y, Breschi A, Vierstra J, Wu W, Ryba T, Sandstrom R, Ma Z, Davis C, Pope BD, Shen Y, Pervouchine DD, Djebali S, Thurman RE, Kaul R, Rynes E, Kirilusha A, Marinov GK, Williams BA, Trout D, Amrhein H, Fisher-Aylor K, Antoshechkin I, DeSalvo G, See LH, Fastuca M, Drenkow J, Zaleski C, Dobin A, Prieto P, Lagarde J, Bussotti G, Tanzer A, Denas O, Li K, Bender MA, Zhang M, Byron R, Groudine MT, McCleary D, Pham L, Ye Z, Kuan S, Edsall L, Wu YC, Rasmussen MD, Bansal MS, Kellis M, Keller CA, Morrissey CS, Mishra T, Jain D, Dogan N, Harris RS, Cayting P, Kawli T, Boyle AP, Euskirchen G, Kundaje A, Lin S, Lin Y, Jansen C, Malladi VS, Cline MS, Erickson DT, Kirkup VM, Learned K, Sloan CA, Rosenbloom KR, Lacerda de Sousa B, Beal K, Pignatelli M, Flicek P, Lian J, Kahveci T, Lee D, Kent WJ, Ramalho Santos M, Herrero J, Notredame C, Johnson A, Vong S, Lee K, Bates D, Neri F, Diegel M, Canfield T, Sabo PJ, Wilken MS, Reh TA, Giste E, Shafer A, Kutyavin T, Haugen E, Dunn D, Reynolds AP, Neph S, Humbert R, Hansen RS, De Bruijn M, Selleri L, Rudensky A, Josefowicz S, Samstein R, Eichler EE, Orkin SH, Levasseur D, Papayannopoulou T, Chang KH, Skoultchi A, Gosh S, Disteche C, Treuting P, Wang Y, Weiss MJ, Blobel GA, Cao X, Zhong S, Wang T, Good PJ, Lowdon RF, Adams LB, Zhou XQ, Pazin MJ, Feingold EA, Wold B, Taylor J, Mortazavi A, Weissman SM, Stamatoyannopoulos JA, Snyder MP, Guigo R, Gingeras TR, Gilbert DM, Hardison RC, Beer MA, Ren B. A comparative encyclopedia of DNA elements in the mouse genome. Nature 2015; 515:355-64. [PMID: 25409824 PMCID: PMC4266106 DOI: 10.1038/nature13992] [Citation(s) in RCA: 1135] [Impact Index Per Article: 126.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 10/24/2014] [Indexed: 12/11/2022]
Abstract
The laboratory mouse shares the majority of its protein-coding genes with humans, making it the premier model organism in biomedical research, yet the two mammals differ in significant ways. To gain greater insights into both shared and species-specific transcriptional and cellular regulatory programs in the mouse, the Mouse ENCODE Consortium has mapped transcription, DNase I hypersensitivity, transcription factor binding, chromatin modifications and replication domains throughout the mouse genome in diverse cell and tissue types. By comparing with the human genome, we not only confirm substantial conservation in the newly annotated potential functional sequences, but also find a large degree of divergence of sequences involved in transcriptional regulation, chromatin state and higher order chromatin organization. Our results illuminate the wide range of evolutionary forces acting on genes and their regulatory regions, and provide a general resource for research into mammalian biology and mechanisms of human diseases.
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Affiliation(s)
- Feng Yue
- 1] Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA. [2] Department of Biochemistry and Molecular Biology, College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania 17033, USA
| | - Yong Cheng
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Alessandra Breschi
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Jeff Vierstra
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Weisheng Wu
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Tyrone Ryba
- Department of Biological Science, 319 Stadium Drive, Florida State University, Tallahassee, Florida 32306-4295, USA
| | - Richard Sandstrom
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Zhihai Ma
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Carrie Davis
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Benjamin D Pope
- Department of Biological Science, 319 Stadium Drive, Florida State University, Tallahassee, Florida 32306-4295, USA
| | - Yin Shen
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Dmitri D Pervouchine
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Sarah Djebali
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Robert E Thurman
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Rajinder Kaul
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Eric Rynes
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Anthony Kirilusha
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Georgi K Marinov
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Brian A Williams
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Diane Trout
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Henry Amrhein
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Katherine Fisher-Aylor
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Igor Antoshechkin
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Gilberto DeSalvo
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - Lei-Hoon See
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Meagan Fastuca
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Jorg Drenkow
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Chris Zaleski
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Alex Dobin
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - Pablo Prieto
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Julien Lagarde
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Giovanni Bussotti
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Andrea Tanzer
- 1] Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain. [2] Department of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Waehringerstrasse 17/3/303, A-1090 Vienna, Austria
| | - Olgert Denas
- Departments of Biology and Mathematics and Computer Science, Emory University, O. Wayne Rollins Research Center, 1510 Clifton Road NE, Atlanta, Georgia 30322, USA
| | - Kanwei Li
- Departments of Biology and Mathematics and Computer Science, Emory University, O. Wayne Rollins Research Center, 1510 Clifton Road NE, Atlanta, Georgia 30322, USA
| | - M A Bender
- 1] Department of Pediatrics, University of Washington, Seattle, Washington 98195, USA. [2] Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | - Miaohua Zhang
- Basic Science Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | - Rachel Byron
- Basic Science Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA
| | - Mark T Groudine
- 1] Basic Science Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109, USA. [2] Department of Radiation Oncology, University of Washington, Seattle, Washington 98195, USA
| | - David McCleary
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Long Pham
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Zhen Ye
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Samantha Kuan
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Lee Edsall
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Yi-Chieh Wu
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA
| | - Matthew D Rasmussen
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA
| | - Mukul S Bansal
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA
| | - Manolis Kellis
- 1] Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA. [2] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA
| | - Cheryl A Keller
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Christapher S Morrissey
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Tejaswini Mishra
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Deepti Jain
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Nergiz Dogan
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Robert S Harris
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Philip Cayting
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Trupti Kawli
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Alan P Boyle
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Ghia Euskirchen
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Anshul Kundaje
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Shin Lin
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Yiing Lin
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Camden Jansen
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, California 92697, USA
| | - Venkat S Malladi
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Melissa S Cline
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California 95064, USA
| | - Drew T Erickson
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Vanessa M Kirkup
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California 95064, USA
| | - Katrina Learned
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California 95064, USA
| | - Cricket A Sloan
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Kate R Rosenbloom
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California 95064, USA
| | - Beatriz Lacerda de Sousa
- Departments of Obstetrics/Gynecology and Pathology, and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California 94143, USA
| | - Kathryn Beal
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
| | - Miguel Pignatelli
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
| | - Paul Flicek
- European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK
| | - Jin Lian
- Yale University, Department of Genetics, PO Box 208005, 333 Cedar Street, New Haven, Connecticut 06520-8005, USA
| | - Tamer Kahveci
- Computer &Information Sciences &Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - Dongwon Lee
- McKusick-Nathans Institute of Genetic Medicine and Department of Biomedical Engineering, Johns Hopkins University, 733 N. Broadway, BRB 573 Baltimore, Maryland 21205, USA
| | - W James Kent
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California 95064, USA
| | - Miguel Ramalho Santos
- Departments of Obstetrics/Gynecology and Pathology, and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California 94143, USA
| | - Javier Herrero
- 1] European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK. [2] Bill Lyons Informatics Centre, UCL Cancer Institute, University College London, London WC1E 6DD, UK
| | - Cedric Notredame
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Audra Johnson
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Shinny Vong
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Kristen Lee
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Daniel Bates
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Fidencio Neri
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Morgan Diegel
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Theresa Canfield
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Peter J Sabo
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Matthew S Wilken
- Department of Biological Structure, University of Washington, HSB I-516, 1959 NE Pacific Street, Seattle, Washington 98195, USA
| | - Thomas A Reh
- Department of Biological Structure, University of Washington, HSB I-516, 1959 NE Pacific Street, Seattle, Washington 98195, USA
| | - Erika Giste
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Anthony Shafer
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Tanya Kutyavin
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Eric Haugen
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Douglas Dunn
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Alex P Reynolds
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Shane Neph
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Richard Humbert
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - R Scott Hansen
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Marella De Bruijn
- MRC Molecular Haemotology Unit, University of Oxford, Oxford OX3 9DS, UK
| | - Licia Selleri
- Department of Cell and Developmental Biology, Weill Cornell Medical College, New York, New York 10065, USA
| | - Alexander Rudensky
- HHMI and Ludwig Center at Memorial Sloan Kettering Cancer Center, Immunology Program, Memorial Sloan Kettering Cancer Canter, New York, New York 10065, USA
| | - Steven Josefowicz
- HHMI and Ludwig Center at Memorial Sloan Kettering Cancer Center, Immunology Program, Memorial Sloan Kettering Cancer Canter, New York, New York 10065, USA
| | - Robert Samstein
- HHMI and Ludwig Center at Memorial Sloan Kettering Cancer Center, Immunology Program, Memorial Sloan Kettering Cancer Canter, New York, New York 10065, USA
| | - Evan E Eichler
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA
| | - Stuart H Orkin
- Dana Farber Cancer Institute, Harvard Medical School, Cambridge, Massachusetts 02138, USA
| | - Dana Levasseur
- University of Iowa Carver College of Medicine, Department of Internal Medicine, Iowa City, Iowa 52242, USA
| | - Thalia Papayannopoulou
- Division of Hematology, Department of Medicine, University of Washington, Seattle, Washington 98195, USA
| | - Kai-Hsin Chang
- University of Iowa Carver College of Medicine, Department of Internal Medicine, Iowa City, Iowa 52242, USA
| | - Arthur Skoultchi
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Srikanta Gosh
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Christine Disteche
- Department of Pathology, University of Washington, Seattle, Washington 98195, USA
| | - Piper Treuting
- Department of Comparative Medicine, University of Washington, Seattle, Washington 98195, USA
| | - Yanli Wang
- Bioinformatics and Genomics program, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Mitchell J Weiss
- Department of Hematology, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
| | - Gerd A Blobel
- 1] Division of Hematology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA. [2] Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Xiaoyi Cao
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Sheng Zhong
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA
| | - Ting Wang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, Missouri 63108, USA
| | - Peter J Good
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Rebecca F Lowdon
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Leslie B Adams
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Xiao-Qiao Zhou
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Michael J Pazin
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Elise A Feingold
- NHGRI, National Institutes of Health, 5635 Fishers Lane, Bethesda, Maryland 20892-9307, USA
| | - Barbara Wold
- Division of Biology, California Institute of Technology, Pasadena, California 91125, USA
| | - James Taylor
- Departments of Biology and Mathematics and Computer Science, Emory University, O. Wayne Rollins Research Center, 1510 Clifton Road NE, Atlanta, Georgia 30322, USA
| | - Ali Mortazavi
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, California 92697, USA
| | - Sherman M Weissman
- Yale University, Department of Genetics, PO Box 208005, 333 Cedar Street, New Haven, Connecticut 06520-8005, USA
| | | | - Michael P Snyder
- Department of Genetics, Stanford University, 300 Pasteur Drive, MC-5477 Stanford, California 94305, USA
| | - Roderic Guigo
- Bioinformatics and Genomics, Centre for Genomic Regulation (CRG) and UPF, Doctor Aiguader, 88, 08003 Barcelona, Catalonia, Spain
| | - Thomas R Gingeras
- Functional Genomics, Cold Spring Harbor Laboratory, Bungtown Road, Cold Spring Harbor, New York 11724, USA
| | - David M Gilbert
- Department of Biological Science, 319 Stadium Drive, Florida State University, Tallahassee, Florida 32306-4295, USA
| | - Ross C Hardison
- Center for Comparative Genomics and Bioinformatics, Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Michael A Beer
- McKusick-Nathans Institute of Genetic Medicine and Department of Biomedical Engineering, Johns Hopkins University, 733 N. Broadway, BRB 573 Baltimore, Maryland 21205, USA
| | - Bing Ren
- Ludwig Institute for Cancer Research and University of California, San Diego School of Medicine, 9500 Gilman Drive, La Jolla, California 92093, USA
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8
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Zhang B, Xing X, Li J, Lowdon RF, Zhou Y, Lin N, Zhang B, Sundaram V, Chiappinelli KB, Hagemann IS, Mutch DG, Goodfellow PJ, Wang T. Comparative DNA methylome analysis of endometrial carcinoma reveals complex and distinct deregulation of cancer promoters and enhancers. BMC Genomics 2014; 15:868. [PMID: 25286960 PMCID: PMC4198682 DOI: 10.1186/1471-2164-15-868] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 09/24/2014] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Aberrant DNA methylation is a hallmark of many cancers. Classically there are two types of endometrial cancer, endometrioid adenocarcinoma (EAC), or Type I, and uterine papillary serous carcinoma (UPSC), or Type II. However, the whole genome DNA methylation changes in these two classical types of endometrial cancer is still unknown. RESULTS Here we described complete genome-wide DNA methylome maps of EAC, UPSC, and normal endometrium by applying a combined strategy of methylated DNA immunoprecipitation sequencing (MeDIP-seq) and methylation-sensitive restriction enzyme digestion sequencing (MRE-seq). We discovered distinct genome-wide DNA methylation patterns in EAC and UPSC: 27,009 and 15,676 recurrent differentially methylated regions (DMRs) were identified respectively, compared with normal endometrium. Over 80% of DMRs were in intergenic and intronic regions. The majority of these DMRs were not interrogated on the commonly used Infinium 450K array platform. Large-scale demethylation of chromosome X was detected in UPSC, accompanied by decreased XIST expression. Importantly, we discovered that the majority of the DMRs harbored promoter or enhancer functions and are specifically associated with genes related to uterine development and disease. Among these, abnormal methylation of transposable elements (TEs) may provide a novel mechanism to deregulate normal endometrium-specific enhancers derived from specific TEs. CONCLUSIONS DNA methylation changes are an important signature of endometrial cancer and regulate gene expression by affecting not only proximal promoters but also distal enhancers.
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MESH Headings
- Adaptor Proteins, Signal Transducing/genetics
- Aldehyde Dehydrogenase 1 Family
- Carcinoma, Papillary/genetics
- Carcinoma, Papillary/metabolism
- Chromosomes, Human, X
- CpG Islands
- DNA (Cytosine-5-)-Methyltransferases/genetics
- DNA (Cytosine-5-)-Methyltransferases/metabolism
- DNA Methylation
- DNA Transposable Elements/genetics
- Endometrial Neoplasms/genetics
- Endometrial Neoplasms/physiopathology
- Enhancer Elements, Genetic/genetics
- Female
- Humans
- Kruppel-Like Factor 4
- Kruppel-Like Transcription Factors/genetics
- MutL Protein Homolog 1
- Nuclear Proteins/genetics
- Polymorphism, Single Nucleotide
- Promoter Regions, Genetic/genetics
- RNA, Long Noncoding/genetics
- Retinal Dehydrogenase/genetics
- Sequence Analysis, DNA
- Uterine Neoplasms/genetics
- Uterine Neoplasms/physiopathology
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Affiliation(s)
- Bo Zhang
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
| | - XiaoYun Xing
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
| | - Jing Li
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
- />Shanghai International Joint Cancer Institute, The Second Military Medical University, Shanghai, 200433 P. R. China
| | - Rebecca F Lowdon
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
| | - Yan Zhou
- />Key Laboratory for Applied Statistics of MOE, School of Mathematics and Statistics, Northeast Normal University, Changchun, Jilin Province 130024 P. R. China
| | - Nan Lin
- />Department of Mathematics and Division of Biostatistics, Washington University in Saint Louis, Saint Louis, MO 63130 USA
| | - Baoxue Zhang
- />Key Laboratory for Applied Statistics of MOE, School of Mathematics and Statistics, Northeast Normal University, Changchun, Jilin Province 130024 P. R. China
| | - Vasavi Sundaram
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
| | - Katherine B Chiappinelli
- />Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins University, Baltimore, MD 21231 USA
| | - Ian S Hagemann
- />Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110 USA
| | - David G Mutch
- />Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Washington University School of Medicine, St Louis, MO 63124 USA
| | - Paul J Goodfellow
- />The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210 USA
| | - Ting Wang
- />Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108 USA
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9
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Zhou X, Li D, Lowdon RF, Costello JF, Wang T. methylC Track: visual integration of single-base resolution DNA methylation data on the WashU EpiGenome Browser. ACTA ACUST UNITED AC 2014; 30:2206-7. [PMID: 24728854 DOI: 10.1093/bioinformatics/btu191] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
SUMMARY We present methylC track, an efficient mechanism for visualizing single-base resolution DNA methylation data on a genome browser. The methylC track dynamically integrates the level of methylation, the position and context of the methylated cytosine (i.e. CG, CHG and CHH), strand and confidence level (e.g. read coverage depth in the case of whole-genome bisulfite sequencing data). Investigators can access and integrate these information visually at specific locus or at the genome-wide level on the WashU EpiGenome Browser in the context of other rich epigenomic datasets. AVAILABILITY AND IMPLEMENTATION The methylC track is part of the WashU EpiGenome Browser, which is open source and freely available at http://epigenomegateway.wustl.edu/browser/. The most up-to-date instructions and tools for preparing methylC track are available at http://epigenomegateway.wustl.edu/+/cmtk. CONTACT twang@genetics.wustl.edu SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Xin Zhou
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA and Department of Neurosurgery, Brain Tumor Research Center, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143, USA
| | - Daofeng Li
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA and Department of Neurosurgery, Brain Tumor Research Center, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143, USA
| | - Rebecca F Lowdon
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA and Department of Neurosurgery, Brain Tumor Research Center, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143, USA
| | - Joseph F Costello
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA and Department of Neurosurgery, Brain Tumor Research Center, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143, USA
| | - Ting Wang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63108, USA and Department of Neurosurgery, Brain Tumor Research Center, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, CA 94143, USA
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10
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Zhang B, Zhou Y, Lin N, Lowdon RF, Hong C, Nagarajan RP, Cheng JB, Li D, Stevens M, Lee HJ, Xing X, Zhou J, Sundaram V, Elliott G, Gu J, Shi T, Gascard P, Sigaroudinia M, Tlsty TD, Kadlecek T, Weiss A, O'Geen H, Farnham PJ, Maire CL, Ligon KL, Madden PAF, Tam A, Moore R, Hirst M, Marra MA, Zhang B, Costello JF, Wang T. Functional DNA methylation differences between tissues, cell types, and across individuals discovered using the M&M algorithm. Genome Res 2013; 23:1522-40. [PMID: 23804400 PMCID: PMC3759728 DOI: 10.1101/gr.156539.113] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
DNA methylation plays key roles in diverse biological processes such as X chromosome inactivation, transposable element repression, genomic imprinting, and tissue-specific gene expression. Sequencing-based DNA methylation profiling provides an unprecedented opportunity to map and compare complete DNA methylomes. This includes one of the most widely applied technologies for measuring DNA methylation: methylated DNA immunoprecipitation followed by sequencing (MeDIP-seq), coupled with a complementary method, methylation-sensitive restriction enzyme sequencing (MRE-seq). A computational approach that integrates data from these two different but complementary assays and predicts methylation differences between samples has been unavailable. Here, we present a novel integrative statistical framework M&M (for integration of MeDIP-seq and MRE-seq) that dynamically scales, normalizes, and combines MeDIP-seq and MRE-seq data to detect differentially methylated regions. Using sample-matched whole-genome bisulfite sequencing (WGBS) as a gold standard, we demonstrate superior accuracy and reproducibility of M&M compared to existing analytical methods for MeDIP-seq data alone. M&M leverages the complementary nature of MeDIP-seq and MRE-seq data to allow rapid comparative analysis between whole methylomes at a fraction of the cost of WGBS. Comprehensive analysis of nineteen human DNA methylomes with M&M reveals distinct DNA methylation patterns among different tissue types, cell types, and individuals, potentially underscoring divergent epigenetic regulation at different scales of phenotypic diversity. We find that differential DNA methylation at enhancer elements, with concurrent changes in histone modifications and transcription factor binding, is common at the cell, tissue, and individual levels, whereas promoter methylation is more prominent in reinforcing fundamental tissue identities.
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Affiliation(s)
- Bo Zhang
- Department of Genetics, Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, Missouri 63108, USA.
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11
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Zhou X, Lowdon RF, Li D, Lawson HA, Madden PAF, Costello JF, Wang T. Exploring long-range genome interactions using the WashU Epigenome Browser. Nat Methods 2013; 10:375-6. [PMID: 23629413 DOI: 10.1038/nmeth.2440] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Stamatoyannopoulos JA, Snyder M, Hardison R, Ren B, Gingeras T, Gilbert DM, Groudine M, Bender M, Kaul R, Canfield T, Giste E, Johnson A, Zhang M, Balasundaram G, Byron R, Roach V, Sabo PJ, Sandstrom R, Stehling AS, Thurman RE, Weissman SM, Cayting P, Hariharan M, Lian J, Cheng Y, Landt SG, Ma Z, Wold BJ, Dekker J, Crawford GE, Keller CA, Wu W, Morrissey C, Kumar SA, Mishra T, Jain D, Byrska-Bishop M, Blankenberg D, Lajoie1 BR, Jain G, Sanyal A, Chen KB, Denas O, Taylor J, Blobel GA, Weiss MJ, Pimkin M, Deng W, Marinov GK, Williams BA, Fisher-Aylor KI, Desalvo G, Kiralusha A, Trout D, Amrhein H, Mortazavi A, Edsall L, McCleary D, Kuan S, Shen Y, Yue F, Ye Z, Davis CA, Zaleski C, Jha S, Xue C, Dobin A, Lin W, Fastuca M, Wang H, Guigo R, Djebali S, Lagarde J, Ryba T, Sasaki T, Malladi VS, Cline MS, Kirkup VM, Learned K, Rosenbloom KR, Kent WJ, Feingold EA, Good PJ, Pazin M, Lowdon RF, Adams LB. An encyclopedia of mouse DNA elements (Mouse ENCODE). Genome Biol 2012; 13:418. [PMID: 22889292 PMCID: PMC3491367 DOI: 10.1186/gb-2012-13-8-418] [Citation(s) in RCA: 343] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
To complement the human Encyclopedia of DNA Elements (ENCODE) project and to enable a broad range of mouse genomics efforts, the Mouse ENCODE Consortium is applying the same experimental pipelines developed for human ENCODE to annotate the mouse genome.
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Affiliation(s)
- John A Stamatoyannopoulos
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Michael Snyder
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Ross Hardison
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Bing Ren
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Thomas Gingeras
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - David M Gilbert
- Department of Biological Science, Florida State University, Tallahassee, Florida, USA
| | - Mark Groudine
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Michael Bender
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Rajinder Kaul
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Theresa Canfield
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Erica Giste
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Audra Johnson
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Mia Zhang
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Gayathri Balasundaram
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Rachel Byron
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Vaughan Roach
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Peter J Sabo
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Richard Sandstrom
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - A Sandra Stehling
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | - Robert E Thurman
- Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington, USA
| | | | - Philip Cayting
- Department of Genetics, Yale University, New Haven, Connecticut, USA
- Program in Computational Biology and Bioinformatics, Yale University, New Haven, Connecticut, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut, USA
| | - Manoj Hariharan
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Jin Lian
- Program in Computational Biology and Bioinformatics, Yale University, New Haven, Connecticut, USA
| | - Yong Cheng
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Stephen G Landt
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Zhihai Ma
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Barbara J Wold
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Job Dekker
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachussetts, USA
| | - Gregory E Crawford
- Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina, USA
- Department of Pediatrics, Duke University, Durham, North Carolina, USA
| | - Cheryl A Keller
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Weisheng Wu
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Christopher Morrissey
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Swathi A Kumar
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Tejaswini Mishra
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Deepti Jain
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Marta Byrska-Bishop
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Daniel Blankenberg
- Center for Comparative Genomics and Bioinformatics, Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Bryan R Lajoie1
- Department of Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Gaurav Jain
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachussetts, USA
| | - Amartya Sanyal
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachussetts, USA
| | - Kaun-Bei Chen
- Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina, USA
| | - Olgert Denas
- Institute for Genome Sciences and Policy, Duke University, Durham, North Carolina, USA
| | - James Taylor
- Department of Mathematics and Computer Science, Emory University, Atlanta, Georgia, USA
| | - Gerd A Blobel
- Div. of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, Philadelphia, Pennsylvania, USA
| | - Mitchell J Weiss
- Div. of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, Philadelphia, Pennsylvania, USA
| | - Max Pimkin
- Div. of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, Philadelphia, Pennsylvania, USA
| | - Wulan Deng
- Div. of Hematology, Children's Hospital of Philadelphia, Abramson Research Center, Philadelphia, Pennsylvania, USA
| | - Georgi K Marinov
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Brian A Williams
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | | | - Gilberto Desalvo
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Anthony Kiralusha
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Diane Trout
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Henry Amrhein
- Div. of Biology, California Institute of Technology, Pasadena, California, USA
| | - Ali Mortazavi
- Dept. of Developmental and Cell Biology, University of California Irvine, Irvine California, USA
| | - Lee Edsall
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - David McCleary
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Samantha Kuan
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Yin Shen
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Feng Yue
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Zhen Ye
- Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California San Diego, La Jolla, California, USA
| | - Carrie A Davis
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Chris Zaleski
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Sonali Jha
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Chenghai Xue
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Alex Dobin
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Wei Lin
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Meagan Fastuca
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Huaien Wang
- Dept. of Functional Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, USA
| | - Roderic Guigo
- Division of Bioinformatics and Genomics, Center for Genomic Regulation, Barcelona, Catalunya, Spain
| | - Sarah Djebali
- Division of Bioinformatics and Genomics, Center for Genomic Regulation, Barcelona, Catalunya, Spain
| | - Julien Lagarde
- Division of Bioinformatics and Genomics, Center for Genomic Regulation, Barcelona, Catalunya, Spain
| | - Tyrone Ryba
- Department of Biological Science, Florida State University, Tallahassee, Florida, USA
| | - Takayo Sasaki
- Department of Biological Science, Florida State University, Tallahassee, Florida, USA
| | - Venkat S Malladi
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - Melissa S Cline
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - Vanessa M Kirkup
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - Katrina Learned
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - Kate R Rosenbloom
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - W James Kent
- Center for Biomolecular Science and Engineering, School of Engineering, University of California Santa Cruz (UCSC), Santa Cruz, California, USA
| | - Elise A Feingold
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Peter J Good
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Michael Pazin
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Rebecca F Lowdon
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Leslie B Adams
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
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13
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Gerstein MB, Lu ZJ, Van Nostrand EL, Cheng C, Arshinoff BI, Liu T, Yip KY, Robilotto R, Rechtsteiner A, Ikegami K, Alves P, Chateigner A, Perry M, Morris M, Auerbach RK, Feng X, Leng J, Vielle A, Niu W, Rhrissorrakrai K, Agarwal A, Alexander RP, Barber G, Brdlik CM, Brennan J, Brouillet JJ, Carr A, Cheung MS, Clawson H, Contrino S, Dannenberg LO, Dernburg AF, Desai A, Dick L, Dosé AC, Du J, Egelhofer T, Ercan S, Euskirchen G, Ewing B, Feingold EA, Gassmann R, Good PJ, Green P, Gullier F, Gutwein M, Guyer MS, Habegger L, Han T, Henikoff JG, Henz SR, Hinrichs A, Holster H, Hyman T, Iniguez AL, Janette J, Jensen M, Kato M, Kent WJ, Kephart E, Khivansara V, Khurana E, Kim JK, Kolasinska-Zwierz P, Lai EC, Latorre I, Leahey A, Lewis S, Lloyd P, Lochovsky L, Lowdon RF, Lubling Y, Lyne R, MacCoss M, Mackowiak SD, Mangone M, McKay S, Mecenas D, Merrihew G, Miller DM, Muroyama A, Murray JI, Ooi SL, Pham H, Phippen T, Preston EA, Rajewsky N, Rätsch G, Rosenbaum H, Rozowsky J, Rutherford K, Ruzanov P, Sarov M, Sasidharan R, Sboner A, Scheid P, Segal E, Shin H, Shou C, Slack FJ, Slightam C, Smith R, Spencer WC, Stinson EO, Taing S, Takasaki T, Vafeados D, Voronina K, Wang G, Washington NL, Whittle CM, Wu B, Yan KK, Zeller G, Zha Z, Zhong M, Zhou X, Ahringer J, Strome S, Gunsalus KC, Micklem G, Liu XS, Reinke V, Kim SK, Hillier LW, Henikoff S, Piano F, Snyder M, Stein L, Lieb JD, Waterston RH. Integrative analysis of the Caenorhabditis elegans genome by the modENCODE project. Science 2010; 330:1775-87. [PMID: 21177976 PMCID: PMC3142569 DOI: 10.1126/science.1196914] [Citation(s) in RCA: 741] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We systematically generated large-scale data sets to improve genome annotation for the nematode Caenorhabditis elegans, a key model organism. These data sets include transcriptome profiling across a developmental time course, genome-wide identification of transcription factor-binding sites, and maps of chromatin organization. From this, we created more complete and accurate gene models, including alternative splice forms and candidate noncoding RNAs. We constructed hierarchical networks of transcription factor-binding and microRNA interactions and discovered chromosomal locations bound by an unusually large number of transcription factors. Different patterns of chromatin composition and histone modification were revealed between chromosome arms and centers, with similarly prominent differences between autosomes and the X chromosome. Integrating data types, we built statistical models relating chromatin, transcription factor binding, and gene expression. Overall, our analyses ascribed putative functions to most of the conserved genome.
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Affiliation(s)
- Mark B. Gerstein
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Zhi John Lu
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Eric L. Van Nostrand
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
| | - Chao Cheng
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Bradley I. Arshinoff
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Molecular Genetics, University of Toronto, 27 King's College Circle, Toronto, Ontario M5S 1A1, Canada
| | - Tao Liu
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Kevin Y. Yip
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Rebecca Robilotto
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Andreas Rechtsteiner
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Kohta Ikegami
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Pedro Alves
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Aurelien Chateigner
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Marc Perry
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mitzi Morris
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Raymond K. Auerbach
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Xin Feng
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Biomedical Engineering, State University of New York at Stonybrook, Stonybrook, NY 11794, USA
| | - Jing Leng
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Anne Vielle
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Wei Niu
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Kahn Rhrissorrakrai
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Ashish Agarwal
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Roger P. Alexander
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Galt Barber
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Cathleen M. Brdlik
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
| | - Jennifer Brennan
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Adrian Carr
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Ming-Sin Cheung
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Hiram Clawson
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Sergio Contrino
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | | | - Abby F. Dernburg
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Arshad Desai
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Lindsay Dick
- David Rockefeller Graduate Program, Rockefeller University, 1230 York Avenue New York, NY 10065, USA
| | - Andréa C. Dosé
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jiang Du
- Department of Computer Science, Yale University, 51 Prospect Street, New Haven, CT 06511, USA
| | - Thea Egelhofer
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Sevinc Ercan
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ghia Euskirchen
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Brent Ewing
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Elise A. Feingold
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Reto Gassmann
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Peter J. Good
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Phil Green
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Francois Gullier
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Michelle Gutwein
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Mark S. Guyer
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Lukas Habegger
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Ting Han
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Jorja G. Henikoff
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Stefan R. Henz
- Max Planck Institute for Developmental Biology, Spemannstrasse 37-39, 72076 Tübingen, Germany
| | - Angie Hinrichs
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Heather Holster
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Tony Hyman
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - A. Leo Iniguez
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Judith Janette
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Morten Jensen
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Masaomi Kato
- Department of Molecular, Cellular and Developmental Biology, Post Office Box 208103, Yale University, New Haven, CT 06520, USA
| | - W. James Kent
- Department of Biomolecular Engineering, University of California, Santa Cruz, Santa Cruz, CA 95064 USA
| | - Ellen Kephart
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Vishal Khivansara
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Ekta Khurana
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - John K. Kim
- Life Sciences Institute, Department of Human Genetics, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109–2216, USA
| | - Paulina Kolasinska-Zwierz
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Eric C. Lai
- Sloan-Kettering Institute, 1275 York Avenue, Post Office Box 252, New York, NY 10065, USA
| | - Isabel Latorre
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Amber Leahey
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Suzanna Lewis
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Paul Lloyd
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Lucas Lochovsky
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Rebecca F. Lowdon
- Division of Extramural Research, National Human Genome Research Institute, National Institutes of Health, 5635 Fishers Lane, Suite 4076, Bethesda, MD 20892–9305, USA
| | - Yaniv Lubling
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Rachel Lyne
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Michael MacCoss
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Sebastian D. Mackowiak
- Max-Delbrück-Centrum für Molekulare Medizin, Division of Systems Biology, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch, Germany
| | - Marco Mangone
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Sheldon McKay
- Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11542 USA
| | - Desirea Mecenas
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Gennifer Merrihew
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - David M. Miller
- Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, Nashville, TN 37232–8240, USA
| | - Andrew Muroyama
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - John I. Murray
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Siew-Loon Ooi
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Hoang Pham
- Howard Hughes Medical Institute, Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA, and Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Taryn Phippen
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Elicia A. Preston
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Nikolaus Rajewsky
- Max-Delbrück-Centrum für Molekulare Medizin, Division of Systems Biology, Robert-Rössle-Strasse 10, D-13125 Berlin-Buch, Germany
| | - Gunnar Rätsch
- Friedrich Miescher Laboratory of the Max Planck Society, Spemannstrasse 39, 72076 Tübingen, Germany
| | - Heidi Rosenbaum
- Roche NimbleGen, 500 South Rosa Road, Madison, WI 53719, USA
| | - Joel Rozowsky
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Kim Rutherford
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - Peter Ruzanov
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mihail Sarov
- Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany
| | - Rajkumar Sasidharan
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Andrea Sboner
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Paul Scheid
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
| | - Eran Segal
- Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Hyunjin Shin
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Chong Shou
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Frank J. Slack
- Department of Molecular, Cellular and Developmental Biology, Post Office Box 208103, Yale University, New Haven, CT 06520, USA
| | - Cindie Slightam
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - Richard Smith
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - William C. Spencer
- Department of Cell and Developmental Biology, Vanderbilt University, 465 21st Avenue South, Nashville, TN 37232–8240, USA
| | - E. O. Stinson
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Scott Taing
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
| | - Teruaki Takasaki
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Dionne Vafeados
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Ksenia Voronina
- Ludwig Institute Cancer Research/Department of Cellular and Molecular Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093–0653, USA
| | - Guilin Wang
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Nicole L. Washington
- Genomics Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 64-121, Berkeley, CA 94720 USA
| | - Christina M. Whittle
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Beijing Wu
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - Koon-Kiu Yan
- Program in Computational Biology and Bioinformatics, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
- Department of Molecular Biophysics and Biochemistry, Yale University, Bass 432, 266 Whitney Avenue, New Haven, CT 06520, USA
| | - Georg Zeller
- Friedrich Miescher Laboratory of the Max Planck Society, Spemannstrasse 39, 72076 Tübingen, Germany
- European Molecular Biology Laboratory, 69117 Heidelberg, Germany
| | - Zheng Zha
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
| | - Mei Zhong
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Xingliang Zhou
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Julie Ahringer
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK
| | - Susan Strome
- Molecular, Cell, and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Kristin C. Gunsalus
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
- New York University, Abu Dhabi, United Arab Emirates
| | - Gos Micklem
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK, and Cambridge Systems Biology Centre, Tennis Court Road, Cambridge CB2 1QR, UK
| | - X. Shirley Liu
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Valerie Reinke
- Department of Genetics, Yale University School of Medicine, New Haven, CT 06520–8005, USA
| | - Stuart K. Kim
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
- Department of Developmental Biology, Stanford University Medical Center, 279 Campus Drive, Stanford, CA 94305–5329, USA
| | - LaDeana W. Hillier
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
| | - Steven Henikoff
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Fabio Piano
- Center for Genomics and Systems Biology, Department of Biology, New York University, 1009 Silver Center, 100 Washington Square East, New York, NY 10003–6688, USA
- New York University, Abu Dhabi, United Arab Emirates
| | - Michael Snyder
- Department of Genetics, Stanford University Medical Center, Stanford, CA 94305, USA
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06824, USA
| | - Lincoln Stein
- Ontario Institute for Cancer Research, 101 College Street, Suite 800, Toronto, Ontario M5G 0A3, Canada
- Department of Molecular Genetics, University of Toronto, 27 King's College Circle, Toronto, Ontario M5S 1A1, Canada
- Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11542 USA
| | - Jason D. Lieb
- Department of Biology and Carolina Center for Genome Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Robert H. Waterston
- Department of Genome Sciences, University of Washington School of Medicine, William H. Foege Building S350D, 1705 NE Pacific Street, Post Office Box 355065, Seattle, WA 98195–5065, USA
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