- PDB-8as5: CryoEM structure of the human Nucleophosmin 1 core -
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基本情報
登録情報
データベース: PDB / ID: 8as5
タイトル
CryoEM structure of the human Nucleophosmin 1 core
要素
Nucleophosmin
キーワード
CHAPERONE / Phase separation
機能・相同性
機能・相同性情報
regulation of mRNA stability involved in cellular response to UV / regulation of eIF2 alpha phosphorylation by dsRNA / regulation of endoribonuclease activity / negative regulation of centrosome duplication / positive regulation of cell cycle G2/M phase transition / regulation of endodeoxyribonuclease activity / regulation of centriole replication / granular component / positive regulation of centrosome duplication / positive regulation of protein localization to nucleolus ...regulation of mRNA stability involved in cellular response to UV / regulation of eIF2 alpha phosphorylation by dsRNA / regulation of endoribonuclease activity / negative regulation of centrosome duplication / positive regulation of cell cycle G2/M phase transition / regulation of endodeoxyribonuclease activity / regulation of centriole replication / granular component / positive regulation of centrosome duplication / positive regulation of protein localization to nucleolus / negative regulation of protein kinase activity by regulation of protein phosphorylation / TFAP2A acts as a transcriptional repressor during retinoic acid induced cell differentiation / SARS-CoV-1-host interactions / regulation of centrosome duplication / spindle pole centrosome / ALK mutants bind TKIs / Tat protein binding / Nuclear import of Rev protein / cell volume homeostasis / centrosome cycle / TP53 regulates transcription of additional cell cycle genes whose exact role in the p53 pathway remain uncertain / nucleocytoplasmic transport / regulation of DNA damage response, signal transduction by p53 class mediator / protein kinase inhibitor activity / ribosomal large subunit binding / negative regulation of mRNA splicing, via spliceosome / macrophage differentiation / ribosomal small subunit binding / ribosomal large subunit export from nucleus / NF-kappaB binding / core promoter sequence-specific DNA binding / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / Deposition of new CENPA-containing nucleosomes at the centromere / SUMOylation of transcription cofactors / positive regulation of translation / ribosomal large subunit biogenesis / ribosome assembly / positive regulation of protein ubiquitination / intracellular protein transport / regulation of cell growth / positive regulation of NF-kappaB transcription factor activity / protein-DNA complex / PKR-mediated signaling / protein import into nucleus / cellular response to UV / cellular senescence / Signaling by ALK fusions and activated point mutants / unfolded protein binding / intracellular protein localization / nucleosome assembly / large ribosomal subunit / ribosomal small subunit biogenesis / small ribosomal subunit / histone binding / molecular adaptor activity / DNA-binding transcription factor binding / transcription coactivator activity / rRNA binding / protein stabilization / nuclear speck / chromatin remodeling / ribonucleoprotein complex / negative regulation of cell population proliferation / focal adhesion / DNA repair / positive regulation of cell population proliferation / centrosome / chromatin binding / protein kinase binding / negative regulation of apoptotic process / positive regulation of DNA-templated transcription / nucleolus / signal transduction / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / protein-containing complex / RNA binding / nucleoplasm / nucleus / membrane / cytoplasm / cytosol 類似検索 - 分子機能
ジャーナル: PNAS Nexus / 年: 2023 タイトル: A "grappling hook" interaction connects self-assembly and chaperone activity of Nucleophosmin 1. 著者: Mihkel Saluri / Axel Leppert / Genis Valentin Gese / Cagla Sahin / Dilraj Lama / Margit Kaldmäe / Gefei Chen / Arne Elofsson / Timothy M Allison / Marie Arsenian-Henriksson / Jan Johansson / ...著者: Mihkel Saluri / Axel Leppert / Genis Valentin Gese / Cagla Sahin / Dilraj Lama / Margit Kaldmäe / Gefei Chen / Arne Elofsson / Timothy M Allison / Marie Arsenian-Henriksson / Jan Johansson / David P Lane / B Martin Hällberg / Michael Landreh / 要旨: How the self-assembly of partially disordered proteins generates functional compartments in the cytoplasm and particularly in the nucleus is poorly understood. Nucleophosmin 1 (NPM1) is an abundant ...How the self-assembly of partially disordered proteins generates functional compartments in the cytoplasm and particularly in the nucleus is poorly understood. Nucleophosmin 1 (NPM1) is an abundant nucleolar protein that forms large oligomers and undergoes liquid-liquid phase separation by binding RNA or ribosomal proteins. It provides the scaffold for ribosome assembly but also prevents protein aggregation as part of the cellular stress response. Here, we use aggregation assays and native mass spectrometry (MS) to examine the relationship between the self-assembly and chaperone activity of NPM1. We find that oligomerization of full-length NPM1 modulates its ability to retard amyloid formation in vitro. Machine learning-based structure prediction and cryo-electron microscopy reveal fuzzy interactions between the acidic disordered region and the C-terminal nucleotide-binding domain, which cross-link NPM1 pentamers into partially disordered oligomers. The addition of basic peptides results in a tighter association within the oligomers, reducing their capacity to prevent amyloid formation. Together, our findings show that NPM1 uses a "grappling hook" mechanism to form a network-like structure that traps aggregation-prone proteins. Nucleolar proteins and RNAs simultaneously modulate the association strength and chaperone activity, suggesting a mechanism by which nucleolar composition regulates the chaperone activity of NPM1.