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  • 1
    Publication Date: 2014-01-28
    Description: Inherited alleles account for most of the genetic risk for schizophrenia. However, new (de novo) mutations, in the form of large chromosomal copy number changes, occur in a small fraction of cases and disproportionally disrupt genes encoding postsynaptic proteins. Here we show that small de novo mutations, affecting one or a few nucleotides, are overrepresented among glutamatergic postsynaptic proteins comprising activity-regulated cytoskeleton-associated protein (ARC) and N-methyl-d-aspartate receptor (NMDAR) complexes. Mutations are additionally enriched in proteins that interact with these complexes to modulate synaptic strength, namely proteins regulating actin filament dynamics and those whose messenger RNAs are targets of fragile X mental retardation protein (FMRP). Genes affected by mutations in schizophrenia overlap those mutated in autism and intellectual disability, as do mutation-enriched synaptic pathways. Aligning our findings with a parallel case-control study, we demonstrate reproducible insights into aetiological mechanisms for schizophrenia and reveal pathophysiology shared with other neurodevelopmental disorders.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4237002/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4237002/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fromer, Menachem -- Pocklington, Andrew J -- Kavanagh, David H -- Williams, Hywel J -- Dwyer, Sarah -- Gormley, Padhraig -- Georgieva, Lyudmila -- Rees, Elliott -- Palta, Priit -- Ruderfer, Douglas M -- Carrera, Noa -- Humphreys, Isla -- Johnson, Jessica S -- Roussos, Panos -- Barker, Douglas D -- Banks, Eric -- Milanova, Vihra -- Grant, Seth G -- Hannon, Eilis -- Rose, Samuel A -- Chambert, Kimberly -- Mahajan, Milind -- Scolnick, Edward M -- Moran, Jennifer L -- Kirov, George -- Palotie, Aarno -- McCarroll, Steven A -- Holmans, Peter -- Sklar, Pamela -- Owen, Michael J -- Purcell, Shaun M -- O'Donovan, Michael C -- 089062/Wellcome Trust/United Kingdom -- 098051/Wellcome Trust/United Kingdom -- 2 P50MH066392-05A1/MH/NIMH NIH HHS/ -- G0800509/Medical Research Council/United Kingdom -- G0801418/Medical Research Council/United Kingdom -- I01 BX002395/BX/BLRD VA/ -- R01 HG005827/HG/NHGRI NIH HHS/ -- R01HG005827/HG/NHGRI NIH HHS/ -- R01MH071681/MH/NIMH NIH HHS/ -- R01MH099126/MH/NIMH NIH HHS/ -- WT089062/Wellcome Trust/United Kingdom -- WT098051/Wellcome Trust/United Kingdom -- England -- Nature. 2014 Feb 13;506(7487):179-84. doi: 10.1038/nature12929. Epub 2014 Jan 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Division of Psychiatric Genomics in the Department of Psychiatry, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA [2] Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; Medical Research Council Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff CF24 4HQ, UK. ; 1] Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK [2] Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; 1] Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK [2] Department of Bioinformatics, Institute of Molecular and Cell Biology, University of Tartu, 51010 Tartu, Estonia [3] Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00290 Helsinki, Finland. ; 1] Division of Psychiatric Genomics in the Department of Psychiatry, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA [2] Medical Research Council Centre for Neuropsychiatric Genetics and Genomics, Institute of Psychological Medicine and Clinical Neurosciences, Cardiff University, Cardiff CF24 4HQ, UK. ; Division of Psychiatric Genomics in the Department of Psychiatry, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA. ; Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; Department of Psychiatry, Medical University, Sofia 1431, Bulgaria. ; Centre for Neuroregeneration, University of Edinburgh, Edinburgh EH16 4SB, UK. ; 1] Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK [2] Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [3] Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00290 Helsinki, Finland. ; 1] Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [3] Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA. ; 1] Division of Psychiatric Genomics in the Department of Psychiatry, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA [2] Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA. ; 1] Division of Psychiatric Genomics in the Department of Psychiatry, and Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA [2] Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [3] Analytic and Translational Genetics Unit, Psychiatric and Neurodevelopmental Genetics Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24463507" target="_blank"〉PubMed〈/a〉
    Keywords: Child Development Disorders, Pervasive/genetics ; Cytoskeletal Proteins/metabolism ; Exome/genetics ; Fragile X Mental Retardation Protein/metabolism ; Humans ; Intellectual Disability/genetics ; *Models, Neurological ; Mutation/*genetics ; Mutation Rate ; Nerve Net/*metabolism/physiopathology ; Nerve Tissue Proteins/metabolism ; Neural Pathways/*metabolism/physiopathology ; Phenotype ; RNA, Messenger/genetics/metabolism ; Receptors, N-Methyl-D-Aspartate/metabolism ; Schizophrenia/*genetics/metabolism/*physiopathology ; Substrate Specificity ; Synapses/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2014-03-13
    Description: Transcription factors (TF) bind DNA-target sites within promoters to activate gene expression. TFs target their DNA-recognition sequences with high specificity by binding with resident times of up to hours in vitro . However, in vivo TFs can exchange on the order of seconds. The factors that regulate TF dynamics in vivo and increase dissociation rates by orders of magnitude are not known. We investigated TF binding and dissociation dynamics at their recognition sequence within duplex DNA, single nucleosomes and short nucleosome arrays with single molecule total internal reflection fluorescence (smTIRF) microscopy. We find that the rate of TF dissociation from its site within either nucleosomes or nucleosome arrays is increased by 1000-fold relative to duplex DNA. Our results suggest that TF binding within chromatin could be responsible for the dramatic increase in TF exchange in vivo . Furthermore, these studies demonstrate that nucleosomes regulate DNA–protein interactions not only by preventing DNA–protein binding but by dramatically increasing the dissociation rate of protein complexes from their DNA-binding sites.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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  • 3
    Publication Date: 2014-08-29
    Description: Influence of relative NK–DC abundance on placentation and its relation to epigenetic programming in the offspring Cell Death and Disease 5, e1392 (August 2014). doi:10.1038/cddis.2014.353 Authors: N Freitag, M V Zwier, G Barrientos, I Tirado-González, M L Conrad, M Rose, S A Scherjon, T Plösch & S M Blois
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 4
    Publication Date: 2012-11-04
    Description: Eukaryotic genomes are repetitively wrapped into nucleosomes that then regulate access of transcription and DNA repair complexes to DNA. The mechanisms that regulate extrinsic protein interactions within nucleosomes are unresolved. We demonstrate that modulation of the nucleosome unwrapping rate regulates protein binding within nucleosomes. Histone H3 acetyl-lysine 56 [H3(K56ac)] and DNA sequence within the nucleosome entry-exit region additively influence nucleosomal DNA accessibility by increasing the unwrapping rate without impacting rewrapping. These combined epigenetic and genetic factors influence transcription factor (TF) occupancy within the nucleosome by at least one order of magnitude and enhance nucleosome disassembly by the DNA mismatch repair complex, hMSH2–hMSH6. Our results combined with the observation that ~30% of Saccharomyces cerevisiae TF-binding sites reside in the nucleosome entry–exit region suggest that modulation of nucleosome unwrapping is a mechanism for regulating transcription and DNA repair.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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