ジャーナル: Mol Cell / 年: 2025 タイトル: Nuclear pore permeability and fluid flow are modulated by its dilation state. 著者: Patrick C Hoffmann / Hyuntae Kim / Agnieszka Obarska-Kosinska / Jan Philipp Kreysing / Eli Andino-Frydman / Sergio Cruz-León / Erica Margiotta / Lenka Cernikova / Jan Kosinski / Beata ...著者: Patrick C Hoffmann / Hyuntae Kim / Agnieszka Obarska-Kosinska / Jan Philipp Kreysing / Eli Andino-Frydman / Sergio Cruz-León / Erica Margiotta / Lenka Cernikova / Jan Kosinski / Beata Turoňová / Gerhard Hummer / Martin Beck / 要旨: Changing environmental conditions necessitate rapid adaptation of cytoplasmic and nuclear volumes. We use the slime mold Dictyostelium discoideum, known for its ability to tolerate extreme changes in ...Changing environmental conditions necessitate rapid adaptation of cytoplasmic and nuclear volumes. We use the slime mold Dictyostelium discoideum, known for its ability to tolerate extreme changes in osmolarity, to assess which role nuclear pore complexes (NPCs) play in achieving nuclear volume adaptation and relieving mechanical stress. We capitalize on the unique properties of D. discoideum to quantify fluid flow across NPCs. D. discoideum has an elaborate NPC structure in situ. Its dilation state affects NPC permeability for nucleocytosolic flow. Based on mathematical concepts adapted from hydrodynamics, we conceptualize this phenomenon as porous flow across NPCs, which is distinct from canonically characterized modes of nucleocytoplasmic transport because of its dependence on pressure. Viral NPC blockage decreased nucleocytosolic flow. Our results may be relevant for any biological conditions that entail rapid nuclear size adaptation, including metastasizing cancer cells, migrating cells, or differentiating tissues.
ダウンロード / ファイル: emd_52055.map.gz / 形式: CCP4 / 大きさ: 336.3 MB / タイプ: IMAGE STORED AS SIGNED BYTE
注釈
cryo-tomogram D. discoideum - hypoosmotic stress, tomogram 068
ボクセルのサイズ
X=Y=Z: 8.704 Å
密度
最小 - 最大
-128.0 - 127.0
平均 (標準偏差)
16.301613 (±24.298658)
対称性
空間群: 1
詳細
EMDB XML:
マップ形状
Axis order
X
Y
Z
Origin
-98
97
-115
サイズ
1440
1016
241
Spacing
1016
1440
241
セル
A: 8843.265 Å / B: 12533.761 Å / C: 2097.664 Å α=β=γ: 90.0 °
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添付データ
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試料の構成要素
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全体 : Cryo-tomogram of cryo-FIB milled D. discoideum cell in hypoosmoti...
全体
名称: Cryo-tomogram of cryo-FIB milled D. discoideum cell in hypoosmotic stress condition
要素
細胞: Cryo-tomogram of cryo-FIB milled D. discoideum cell in hypoosmotic stress condition
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超分子 #1: Cryo-tomogram of cryo-FIB milled D. discoideum cell in hypoosmoti...
超分子
名称: Cryo-tomogram of cryo-FIB milled D. discoideum cell in hypoosmotic stress condition タイプ: cell / ID: 1 / 親要素: 0
由来(天然)
生物種: Dictyostelium discoideum AX2 (キイロタマホコリカビ)
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
電子線トモグラフィー法
試料の集合状態
cell
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試料調製
緩衝液
pH: 7.2
凍結
凍結剤: ETHANE
詳細
Hypoosmotic stress in distilled water applied for approx. 1 min prior to plunge freezing
切片作成
集束イオンビーム - 装置: OTHER / 集束イオンビーム - イオン: OTHER / 集束イオンビーム - 電圧: 30 / 集束イオンビーム - 電流: 0.03 / 集束イオンビーム - 時間: 3600 / 集束イオンビーム - 温度: 91 K / 集束イオンビーム - Initial thickness: 5000 / 集束イオンビーム - 最終 厚さ: 150 集束イオンビーム - 詳細: for details please see material and methods section of the paper. The value given for _em_focused_ion_beam.instrument is TFS Aquilos2 cryo-FIB/SEM. This is not in a ...集束イオンビーム - 詳細: for details please see material and methods section of the paper. The value given for _em_focused_ion_beam.instrument is TFS Aquilos2 cryo-FIB/SEM. This is not in a list of allowed values {'OTHER', 'DB235'} so OTHER is written into the XML file.
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電子顕微鏡法
顕微鏡
TFS KRIOS
撮影
フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 平均電子線量: 2.3 e/Å2