- EMDB-61233: Cryo-EM structure of BAF-Lamin A/C IgF-H1-nucleosome complex -
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基本情報
登録情報
データベース: EMDB / ID: EMD-61233
タイトル
Cryo-EM structure of BAF-Lamin A/C IgF-H1-nucleosome complex
マップデータ
試料
複合体: Complex containing BAF, Lamin A/C IgF, H1, and nucleosome
タンパク質・ペプチド: Histone H3.1
タンパク質・ペプチド: Histone H4
タンパク質・ペプチド: Histone H2A type 1-B/E
タンパク質・ペプチド: Histone H2B type 1-J
DNA: DNA (193-MER)
DNA: DNA (193-MER)
タンパク質・ペプチド: Barrier-to-autointegration factor
タンパク質・ペプチド: Lamin-A/C
タンパク質・ペプチド: Histone H1.1
キーワード
Nucleosome / DNA binding proteins / Nuclear lamina / NUCLEAR PROTEIN
機能・相同性
機能・相同性情報
negative regulation of mesenchymal cell proliferation / structural constituent of nuclear lamina / negative regulation of protein ADP-ribosylation / ventricular cardiac muscle cell development / establishment or maintenance of microtubule cytoskeleton polarity / Breakdown of the nuclear lamina / DNA double-strand break attachment to nuclear envelope / Depolymerization of the Nuclear Lamina / nuclear envelope organization / nuclear pore localization ...negative regulation of mesenchymal cell proliferation / structural constituent of nuclear lamina / negative regulation of protein ADP-ribosylation / ventricular cardiac muscle cell development / establishment or maintenance of microtubule cytoskeleton polarity / Breakdown of the nuclear lamina / DNA double-strand break attachment to nuclear envelope / Depolymerization of the Nuclear Lamina / nuclear envelope organization / nuclear pore localization / Nuclear Envelope Breakdown / lamin filament / protein localization to nuclear envelope / mitotic nuclear membrane reassembly / XBP1(S) activates chaperone genes / negative regulation of DNA recombination / nuclear lamina / Apoptosis induced DNA fragmentation / Initiation of Nuclear Envelope (NE) Reformation / regulation of protein localization to nucleus / chromosome condensation / regulation of telomere maintenance / Integration of viral DNA into host genomic DNA / Autointegration results in viral DNA circles / intermediate filament / negative regulation of cardiac muscle hypertrophy in response to stress / nucleosomal DNA binding / nuclear migration / negative regulation of type I interferon production / negative regulation of viral genome replication / Formation of Senescence-Associated Heterochromatin Foci (SAHF) / muscle organ development / negative regulation of cGAS/STING signaling pathway / Deregulated CDK5 triggers multiple neurodegenerative pathways in Alzheimer's disease models / 2-LTR circle formation / Vpr-mediated nuclear import of PICs / negative regulation of release of cytochrome c from mitochondria / Integration of provirus / APOBEC3G mediated resistance to HIV-1 infection / negative regulation of tumor necrosis factor-mediated signaling pathway / protein localization to nucleus / chromosome organization / negative regulation of megakaryocyte differentiation / protein localization to CENP-A containing chromatin / Chromatin modifying enzymes / Replacement of protamines by nucleosomes in the male pronucleus / CENP-A containing nucleosome / Packaging Of Telomere Ends / condensed chromosome / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Deposition of new CENPA-containing nucleosomes at the centromere / telomere organization / Inhibition of DNA recombination at telomere / Meiotic synapsis / Interleukin-7 signaling / RNA Polymerase I Promoter Opening / Assembly of the ORC complex at the origin of replication / Regulation of endogenous retroelements by the Human Silencing Hub (HUSH) complex / innate immune response in mucosa / negative regulation of innate immune response / SUMOylation of chromatin organization proteins / DNA methylation / Condensation of Prophase Chromosomes / regulation of cell migration / Chromatin modifications during the maternal to zygotic transition (MZT) / HCMV Late Events / SIRT1 negatively regulates rRNA expression / epigenetic regulation of gene expression / ERCC6 (CSB) and EHMT2 (G9a) positively regulate rRNA expression / PRC2 methylates histones and DNA / Regulation of endogenous retroelements by KRAB-ZFP proteins / Defective pyroptosis / negative regulation of extrinsic apoptotic signaling pathway / Regulation of endogenous retroelements by Piwi-interacting RNAs (piRNAs) / HDACs deacetylate histones / Nonhomologous End-Joining (NHEJ) / RNA Polymerase I Promoter Escape / lipopolysaccharide binding / Transcriptional regulation by small RNAs / Formation of the beta-catenin:TCF transactivating complex / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Activated PKN1 stimulates transcription of AR (androgen receptor) regulated genes KLK2 and KLK3 / euchromatin / G2/M DNA damage checkpoint / HDMs demethylate histones / NoRC negatively regulates rRNA expression / regulation of protein stability / response to virus / DNA Damage/Telomere Stress Induced Senescence / B-WICH complex positively regulates rRNA expression / PKMTs methylate histone lysines / DNA integration / Meiotic recombination / chromatin DNA binding / Pre-NOTCH Transcription and Translation / structural constituent of cytoskeleton / positive regulation of receptor-mediated endocytosis 類似検索 - 分子機能
Japan Agency for Medical Research and Development (AMED)
JP24ama121009
日本
Japan Agency for Medical Research and Development (AMED)
JP24ama121002
日本
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: Cryo-EM structures of the BAF-Lamin A/C complex bound to nucleosomes. 著者: Naoki Horikoshi / Ryosuke Miyake / Chizuru Sogawa-Fujiwara / Mitsuo Ogasawara / Yoshimasa Takizawa / Hitoshi Kurumizaka / 要旨: Barrier-to-autointegration factor (BAF) associates with mitotic chromosomes and promotes nuclear envelope assembly by recruiting proteins, such as Lamins, required for the reconstruction of the ...Barrier-to-autointegration factor (BAF) associates with mitotic chromosomes and promotes nuclear envelope assembly by recruiting proteins, such as Lamins, required for the reconstruction of the nuclear envelope and lamina. BAF also mediates chromatin anchoring to the nuclear lamina via Lamin A/C. However, the mechanism by which BAF and Lamin A/C bind chromatin and affect the chromatin organization remains elusive. Here we report the cryo-electron microscopy structures of BAF-Lamin A/C-nucleosome complexes. We find that the BAF dimer complexed with the Lamin A/C IgF domain occupies the nucleosomal dyad position, forming a tripartite nucleosomal DNA binding structure. We also show that the Lamin A/C Lys486 and His506 residues, which are reportedly mutated in lipodystrophy patients, directly contact the DNA at the nucleosomal dyad. Excess BAF-Lamin A/C complexes symmetrically bind other nucleosomal DNA sites and connect two BAF-Lamin A/C-nucleosome complexes. Although the linker histone H1 competes with BAF-Lamin A/C binding at the nucleosomal dyad region, the two BAF-Lamin A/C molecules still bridge two nucleosomes. These findings provide insights into the mechanism by which BAF, Lamin A/C, and/or histone H1 bind nucleosomes and influence chromatin organization within the nucleus.