title: Nucleosome assembly is required for nuclear pore complex assembly in mouse zygotes.
abstract: Packaging of DNA into nucleosomes not only helps to store genetic information but also creates diverse means for regulating DNA-templated processes. Attempts to reveal additional functions of the nucleosome have been unsuccessful, owing to cell lethality caused by nucleosome deletion. Taking advantage of the mammalian fertilization process, in which sperm DNA assembles into nucleosomes de novo, we generated nucleosome-depleted (ND) paternal pronuclei by depleting maternal histone H3.3 or its chaperone HIRA in mouse zygotes. We found that the ND pronucleus forms a nuclear envelope devoid of nuclear pore complexes (NPCs). Loss of NPCs is accompanied by defective localization of ELYS, a nucleoporin essential for NPC assembly, to the nuclear rim. Interestingly, tethering ELYS to the nuclear rim of the ND nucleus rescues NPC assembly. Our study thus demonstrates that nucleosome assembly is a prerequisite for NPC assembly during paternal pronuclear formation.
authors.affiliation: 1] Howard Hughes Medical Institute, Boston, Massachusetts, USA. [2] Program in Cellular and Molecular Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA. [3] Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts, USA. [4] Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA.
authors.forename: Azusa
authors.initials: A
authors.lastname: Inoue
authors.affiliation: 1] Howard Hughes Medical Institute, Boston, Massachusetts, USA. [2] Program in Cellular and Molecular Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA. [3] Division of Hematology/Oncology, Department of Pediatrics, Boston Children's Hospital, Boston, Massachusetts, USA. [4] Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA. [5] Harvard Stem Cell Institute, Boston, Massachusetts, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000818:Animals; D018797:Cell Cycle Proteins / Q000235:genetics / Q000502:physiology; D042002:Chromatin Assembly and Disassembly; D005306:Fertilization / Q000235:genetics; D056488:Histone Chaperones / Q000235:genetics / Q000502:physiology; D006657:Histones / Q000235:genetics / Q000502:physiology; D008297:Male; D051379:Mice; D008954:Models, Biological; D022022:Nuclear Pore / Q000737:chemistry / Q000378:metabolism*; D009707:Nucleosomes / Q000737:chemistry / Q000378:metabolism*; D013094:Spermatozoa / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics / Q000502:physiology; D015053:Zygote / Q000378:metabolism*
chemical_list: D018797:Cell Cycle Proteins; C484187:Hira protein, mouse; D056488:Histone Chaperones; D006657:Histones; D009707:Nucleosomes; D014157:Transcription Factors