Click here to close
Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly.
We suggest using a current version of Chrome,
FireFox, or Safari.
???displayArticle.abstract???
Nucleosomes are the fundamental unit of chromatin, but analysis of transcription-independent nucleosome functions has been complicated by the gene-expression changes resulting from histone manipulation. Here we solve this dilemma by developing Xenopus laevis egg extracts deficient for nucleosome formation and by analyzing the proteomic landscape and behavior of nucleosomal chromatin and nucleosome-free DNA. We show that although nucleosome-free DNA can recruit nuclear-envelope membranes, nucleosomes are required for spindle assembly and for formation of the lamina and of nuclear pore complexes (NPCs). We show that, in addition to the Ran G-nucleotide exchange factor RCC1, ELYS, the initiator of NPC formation, fails to associate with naked DNA but directly binds histone H2A-H2B dimers and nucleosomes. Tethering ELYS and RCC1 to DNA bypasses the requirement for nucleosomes in NPC formation in a synergistic manner. Thus, the minimal essential function of nucleosomes in NPC formation is to recruit RCC1 and ELYS.
Anderson,
Nuclear envelope formation by chromatin-mediated reorganization of the endoplasmic reticulum.
2007, Pubmed,
Xenbase
Anderson,
Nuclear envelope formation by chromatin-mediated reorganization of the endoplasmic reticulum.
2007,
Pubmed
,
Xenbase
Andrews,
The histone chaperone Nap1 promotes nucleosome assembly by eliminating nonnucleosomal histone DNA interactions.
2010,
Pubmed
,
Xenbase
Bannister,
Regulation of chromatin by histone modifications.
2011,
Pubmed
Bilokapic,
Structural and functional studies of the 252 kDa nucleoporin ELYS reveal distinct roles for its three tethered domains.
2013,
Pubmed
Carroll,
DNA recombination and repair in oocytes, eggs, and extracts.
1991,
Pubmed
,
Xenbase
Chan,
BLM is required for faithful chromosome segregation and its localization defines a class of ultrafine anaphase bridges.
2007,
Pubmed
Clarke,
Spatial and temporal coordination of mitosis by Ran GTPase.
2008,
Pubmed
D'Angelo,
Nuclear pores form de novo from both sides of the nuclear envelope.
2006,
Pubmed
,
Xenbase
Doucet,
Cell cycle-dependent differences in nuclear pore complex assembly in metazoa.
2010,
Pubmed
,
Xenbase
Ederveen,
The human histone H3 complement anno 2011.
2011,
Pubmed
Flavell,
Expressed protein ligation (EPL) in the study of signal transduction, ion conduction, and chromatin biology.
2009,
Pubmed
Forbes,
Spontaneous formation of nucleus-like structures around bacteriophage DNA microinjected into Xenopus eggs.
1983,
Pubmed
,
Xenbase
Franz,
MEL-28/ELYS is required for the recruitment of nucleoporins to chromatin and postmitotic nuclear pore complex assembly.
2007,
Pubmed
,
Xenbase
Funabiki,
The Xenopus chromokinesin Xkid is essential for metaphase chromosome alignment and must be degraded to allow anaphase chromosome movement.
2000,
Pubmed
,
Xenbase
Galy,
MEL-28, a novel nuclear-envelope and kinetochore protein essential for zygotic nuclear-envelope assembly in C. elegans.
2006,
Pubmed
Ghenoiu,
Autoinhibition and Polo-dependent multisite phosphorylation restrict activity of the histone H3 kinase Haspin to mitosis.
2013,
Pubmed
,
Xenbase
Gillespie,
ELYS/MEL-28 chromatin association coordinates nuclear pore complex assembly and replication licensing.
2007,
Pubmed
,
Xenbase
Gorjánácz,
Caenorhabditis elegans BAF-1 and its kinase VRK-1 participate directly in post-mitotic nuclear envelope assembly.
2007,
Pubmed
Guse,
In vitro centromere and kinetochore assembly on defined chromatin templates.
2011,
Pubmed
,
Xenbase
Halpin,
Mitotic spindle assembly around RCC1-coated beads in Xenopus egg extracts.
2011,
Pubmed
,
Xenbase
Hao,
Regulation of chromatin binding by a conformational switch in the tail of the Ran exchange factor RCC1.
2008,
Pubmed
Haraguchi,
Live cell imaging and electron microscopy reveal dynamic processes of BAF-directed nuclear envelope assembly.
2008,
Pubmed
Heald,
Self-organization of microtubules into bipolar spindles around artificial chromosomes in Xenopus egg extracts.
1996,
Pubmed
,
Xenbase
Hirano,
Topoisomerase II does not play a scaffolding role in the organization of mitotic chromosomes assembled in Xenopus egg extracts.
1993,
Pubmed
,
Xenbase
Kelly,
Chromosomal enrichment and activation of the aurora B pathway are coupled to spatially regulate spindle assembly.
2007,
Pubmed
,
Xenbase
Kelly,
Survivin reads phosphorylated histone H3 threonine 3 to activate the mitotic kinase Aurora B.
2010,
Pubmed
,
Xenbase
Kimura,
ATP-dependent positive supercoiling of DNA by 13S condensin: a biochemical implication for chromosome condensation.
1997,
Pubmed
,
Xenbase
Kimura,
The organization of histone H3 modifications as revealed by a panel of specific monoclonal antibodies.
2008,
Pubmed
Lane,
A novel chromatin tether domain controls topoisomerase IIα dynamics and mitotic chromosome formation.
2013,
Pubmed
Li,
The histone mark H3K36me3 regulates human DNA mismatch repair through its interaction with MutSα.
2013,
Pubmed
Loewinger,
Mutations in the nuclear lamin proteins resulting in their aberrant assembly in the cytoplasm.
1988,
Pubmed
Losada,
Cohesin release is required for sister chromatid resolution, but not for condensin-mediated compaction, at the onset of mitosis.
2002,
Pubmed
,
Xenbase
Lowary,
New DNA sequence rules for high affinity binding to histone octamer and sequence-directed nucleosome positioning.
1998,
Pubmed
Makde,
Structure of RCC1 chromatin factor bound to the nucleosome core particle.
2010,
Pubmed
,
Xenbase
Maresca,
Histone H1 is essential for mitotic chromosome architecture and segregation in Xenopus laevis egg extracts.
2005,
Pubmed
,
Xenbase
Maresca,
Spindle assembly in the absence of a RanGTP gradient requires localized CPC activity.
2009,
Pubmed
,
Xenbase
Maze,
Every amino acid matters: essential contributions of histone variants to mammalian development and disease.
2014,
Pubmed
Mical,
The role of sequences unique to nuclear intermediate filaments in the targeting and assembly of human lamin B: evidence for lack of interaction of lamin B with its putative receptor.
1998,
Pubmed
Montes de Oca,
Binding of barrier to autointegration factor (BAF) to histone H3 and selected linker histones including H1.1.
2005,
Pubmed
Murray,
Cell cycle extracts.
1991,
Pubmed
Nachury,
Importin beta is a mitotic target of the small GTPase Ran in spindle assembly.
2001,
Pubmed
,
Xenbase
Nemergut,
Chromatin docking and exchange activity enhancement of RCC1 by histones H2A and H2B.
2001,
Pubmed
,
Xenbase
Newport,
A major developmental transition in early Xenopus embryos: I. characterization and timing of cellular changes at the midblastula stage.
1982,
Pubmed
,
Xenbase
Nicklay,
Analysis of histones in Xenopus laevis. II. mass spectrometry reveals an index of cell type-specific modifications on H3 and H4.
2009,
Pubmed
,
Xenbase
Nozawa,
Human POGZ modulates dissociation of HP1alpha from mitotic chromosome arms through Aurora B activation.
2010,
Pubmed
Oohara,
Spectroscopic studies on histone-DNA interactions. I. The interaction of histone (H2A, H2B) dimer with DNA: DNA sequence dependence.
1987,
Pubmed
Postow,
Ku80 removal from DNA through double strand break-induced ubiquitylation.
2008,
Pubmed
,
Xenbase
Ramadan,
Cdc48/p97 promotes reformation of the nucleus by extracting the kinase Aurora B from chromatin.
2007,
Pubmed
,
Xenbase
Rasala,
ELYS is a dual nucleoporin/kinetochore protein required for nuclear pore assembly and proper cell division.
2006,
Pubmed
,
Xenbase
Rasala,
Capture of AT-rich chromatin by ELYS recruits POM121 and NDC1 to initiate nuclear pore assembly.
2008,
Pubmed
,
Xenbase
Ray-Gallet,
HIRA is critical for a nucleosome assembly pathway independent of DNA synthesis.
2002,
Pubmed
,
Xenbase
Richmond,
The structure of DNA in the nucleosome core.
2003,
Pubmed
Rotem,
Importin beta regulates the seeding of chromatin with initiation sites for nuclear pore assembly.
2009,
Pubmed
,
Xenbase
Ruthenburg,
Recognition of a mononucleosomal histone modification pattern by BPTF via multivalent interactions.
2011,
Pubmed
,
Xenbase
Saeki,
Linker histone variants control chromatin dynamics during early embryogenesis.
2005,
Pubmed
,
Xenbase
Sampath,
The chromosomal passenger complex is required for chromatin-induced microtubule stabilization and spindle assembly.
2004,
Pubmed
,
Xenbase
Seino,
DNA-binding domain of RCC1 protein is not essential for coupling mitosis with DNA replication.
1992,
Pubmed
Shintomi,
Nucleosome assembly protein-1 is a linker histone chaperone in Xenopus eggs.
2005,
Pubmed
,
Xenbase
Strambio-De-Castillia,
The nuclear pore complex: bridging nuclear transport and gene regulation.
2010,
Pubmed
Swedlow,
The making of the mitotic chromosome: modern insights into classical questions.
2003,
Pubmed
Tada,
Condensin association with histone H2A shapes mitotic chromosomes.
2011,
Pubmed
Tseng,
Dual detection of chromosomes and microtubules by the chromosomal passenger complex drives spindle assembly.
2010,
Pubmed
,
Xenbase
Ulbert,
Direct membrane protein-DNA interactions required early in nuclear envelope assembly.
2006,
Pubmed
,
Xenbase
Ura,
Differential association of HMG1 and linker histones B4 and H1 with dinucleosomal DNA: structural transitions and transcriptional repression.
1996,
Pubmed
,
Xenbase
Walter,
Regulation of replicon size in Xenopus egg extracts.
1997,
Pubmed
,
Xenbase
Walter,
Initiation of eukaryotic DNA replication: origin unwinding and sequential chromatin association of Cdc45, RPA, and DNA polymerase alpha.
2000,
Pubmed
,
Xenbase
Walther,
RanGTP mediates nuclear pore complex assembly.
2003,
Pubmed
,
Xenbase
Wang,
Histone H3 Thr-3 phosphorylation by Haspin positions Aurora B at centromeres in mitosis.
2010,
Pubmed
,
Xenbase
Wyrick,
Chromosomal landscape of nucleosome-dependent gene expression and silencing in yeast.
1999,
Pubmed
Xue,
Chromatin-bound Xenopus Dppa2 shapes the nucleus by locally inhibiting microtubule assembly.
2013,
Pubmed
,
Xenbase
Yamagishi,
Two histone marks establish the inner centromere and chromosome bi-orientation.
2010,
Pubmed
Zhang,
Chromatin-independent nuclear envelope assembly induced by Ran GTPase in Xenopus egg extracts.
2000,
Pubmed
,
Xenbase
Zheng,
Barrier-to-autointegration factor (BAF) bridges DNA in a discrete, higher-order nucleoprotein complex.
2000,
Pubmed