- EMDB-53423: Human vault protein - committed conformation -
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基本情報
登録情報
データベース: EMDB / ID: EMD-53423
タイトル
Human vault protein - committed conformation
マップデータ
human vault protein - committed conformation
試料
複合体: Vault protein
タンパク質・ペプチド: Major vault protein
キーワード
Vault protein / vault / MVP / CYTOSOLIC PROTEIN
機能・相同性
機能・相同性情報
protein activation cascade / ERBB signaling pathway / mRNA transport / negative regulation of epidermal growth factor receptor signaling pathway / nuclear pore / protein transport / cell population proliferation / secretory granule lumen / protein phosphatase binding / cytoskeleton ...protein activation cascade / ERBB signaling pathway / mRNA transport / negative regulation of epidermal growth factor receptor signaling pathway / nuclear pore / protein transport / cell population proliferation / secretory granule lumen / protein phosphatase binding / cytoskeleton / ficolin-1-rich granule lumen / intracellular signal transduction / ribonucleoprotein complex / Neutrophil degranulation / protein kinase binding / perinuclear region of cytoplasm / extracellular exosome / extracellular region / membrane / identical protein binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能
Major vault protein (MVP) shoulder domain profile. / Major vault protein, N-terminal / Major vault protein, shoulder domain / Major vault protein / Major vault protein repeat domain 3 / Major vault protein repeat domain 2 / Major vault protein repeat domain 4 / Major vault protein repeat domain / Major vault protein repeat domain superfamily / Major vault protein repeat domain 2 superfamily ...Major vault protein (MVP) shoulder domain profile. / Major vault protein, N-terminal / Major vault protein, shoulder domain / Major vault protein / Major vault protein repeat domain 3 / Major vault protein repeat domain 2 / Major vault protein repeat domain 4 / Major vault protein repeat domain / Major vault protein repeat domain superfamily / Major vault protein repeat domain 2 superfamily / Major Vault Protein repeat domain / Shoulder domain / Major Vault Protein repeat domain / Major Vault Protein Repeat domain / Major Vault Protein repeat domain / MVP (vault) repeat profile. / Band 7/SPFH domain superfamily 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2026 タイトル: Structural flexibility of the human vault particle revealed by high-resolution cryo-EM and molecular dynamics simulations. 著者: Fabio Lapenta / Karen Palacio-Rodriguez / Sergio Cruz-León / Simone Marrancone / Jana Aupič / Nils Marechal / Alexandre Durand / Dihia Moussaoui / Sonia Covaceuszach / Bhavani Gangupam / ...著者: Fabio Lapenta / Karen Palacio-Rodriguez / Sergio Cruz-León / Simone Marrancone / Jana Aupič / Nils Marechal / Alexandre Durand / Dihia Moussaoui / Sonia Covaceuszach / Bhavani Gangupam / Claudia D'Ercole / Cristian Parra / Davide Cotugno / Giulia Tomaino / Paolo Tortora / Ario de Marco / Alberto Cassetta / Alessandra Magistrato / Gerhard Hummer / 要旨: Vaults are massive ribonucleoprotein complexes, highly conserved and abundant in eukaryotic cells, yet with unclear function. Their thin-walled barrel-shape architecture is composed of two ...Vaults are massive ribonucleoprotein complexes, highly conserved and abundant in eukaryotic cells, yet with unclear function. Their thin-walled barrel-shape architecture is composed of two symmetrical, antiparallel half-shells, each containing 39 copies of the major vault protein (MVP). The spacious lumen of the vault suggests a role in cellular transport. Although vaults are thought to undergo conformational changes to facilitate cargo exchange, the molecular basis for their inherent flexibility remains unknown. Here, we integrate cryogenic electron microscopy (cryo-EM) and multi-scale molecular dynamics (MD) simulations to reveal the structural determinants of the human vault particle's flexibility. Cryo-EM identified two high-resolution alternative conformational states: a symmetric and an asymmetric structure, pointing to the vault shell's structural plasticity. MD simulations of these conformations revealed that these structures are flexible and exhibit breathing-like motions, and porous solvent-exposed surfaces. Mutagenesis disrupting persistent MD-identified inter-half contacts reduced full MVP shell assembly, confirming the functional relevance of these flexibility determinants. Together, these findings establish the molecular basis for the human vault particle's conformational plasticity.