National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI127401
米国
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)
AR079766
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM150905
米国
Chan Zuckerberg Initiative
2021-234593
米国
Department of Energy (DOE, United States)
DE-AC02-76SF00515
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI177778
米国
引用
ジャーナル: bioRxiv / 年: 2024 タイトル: Human NLRP3 inflammasome activation leads to formation of condensate at the microtubule organizing center. 著者: Jue Wang / Man Wu / Venkat G Magupalli / Peter D Dahlberg / Hao Wu / Grant J Jensen / 要旨: The NLRP3 inflammasome is a multi-protein molecular machine that mediates inflammatory responses in innate immunity. Its dysregulation has been linked to a large number of human diseases. Using ...The NLRP3 inflammasome is a multi-protein molecular machine that mediates inflammatory responses in innate immunity. Its dysregulation has been linked to a large number of human diseases. Using cryogenic fluorescence-guided focused-ion-beam (cryo-FIB) milling and electron cryo-tomography (cryo-ET), we obtained 3-D images of the NLRP3 inflammasome at various stages of its activation at macromolecular resolution. The cryo-tomograms unexpectedly reveal dense condensates of the human macrophage NLRP3 inflammasome that form within and around the microtubule organizing center (MTOC). We also find that following activation, the trans-Golgi network disperses and 50-nm NLRP3-associated vesicles appear which likely ferry NLRP3 to the MTOC. At later time points after activation, the electron-dense condensates progressively solidify and the cells undergo pyroptosis with widespread damaged mitochondria and autophagasomal structures.
A: 14192.64 Å / B: 19958.4 Å / C: 5544.0 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 : Differentiated human THP-1 cells treated with LPS
全体
名称: Differentiated human THP-1 cells treated with LPS
要素
細胞: Differentiated human THP-1 cells treated with LPS
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超分子 #1: Differentiated human THP-1 cells treated with LPS
超分子
名称: Differentiated human THP-1 cells treated with LPS / タイプ: cell / ID: 1 / 親要素: 0
由来(天然)
生物種: Human THP-1 cells (ヒト)
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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: 7.4 詳細: Roswell Park Memorial Institute (RPMI) Medium supplemented with heat inactivated 10% FBS, 10mM HEPES, 1mM sodium pyruvate, 0.05mM 2-mercaptoethanol, 100units/mL of penicillin and streptomycin
凍結剤: ETHANE / チャンバー内湿度: 95 % / チャンバー内温度: 298 K / 装置: FEI VITROBOT MARK IV
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: 0.3 / 集束イオンビーム - 時間: 300 / 集束イオンビーム - 温度: 100 K / 集束イオンビーム - Initial thickness: 3000 / 集束イオンビーム - 最終 厚さ: 180 集束イオンビーム - 詳細: Cryo-FIB milling was guided by fluorescence. The value given for _em_focused_ion_beam.instrument is Aquilos2 Dual-Beam system with customized integrated ENZEL ...集束イオンビーム - 詳細: Cryo-FIB milling was guided by fluorescence. The value given for _em_focused_ion_beam.instrument is Aquilos2 Dual-Beam system with customized integrated ENZEL fluorescent light microscope. This is not in a list of allowed values {'DB235', 'OTHER'} 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: 140.0 e/Å2