- EMDB-16872: Subtomogram average of long bridges of the yeast ER-mitochondria ... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-16872
タイトル
Subtomogram average of long bridges of the yeast ER-mitochondria encounter structure (ERMES). The population half containing longer bridge structures was averaged.
マップデータ
Subtomogram average (STA) map of long ERMES bridge structures. The data set of all bridges was split into halves according to bridge length. The map has been aligned to the STA map of short bridges.
試料
細胞: Budding yeast cells expressing Mdm34-mNeonGreen, a component of the ER-mitochondria encounter structure (ERMES).
キーワード
ERMES / lipid transfer protein / membrane contact sites / SMP domains / LIPID TRANSPORT
Natural Sciences and Engineering Research Council (NSERC, Canada)
カナダ
Swiss National Science Foundation
185544
スイス
Swiss National Science Foundation
201158
スイス
Swiss National Science Foundation
194807
スイス
European Research Council (ERC)
803952
European Union
引用
ジャーナル: Nature / 年: 2023 タイトル: In situ architecture of the ER-mitochondria encounter structure. 著者: Michael R Wozny / Andrea Di Luca / Dustin R Morado / Andrea Picco / Rasha Khaddaj / Pablo Campomanes / Lazar Ivanović / Patrick C Hoffmann / Elizabeth A Miller / Stefano Vanni / Wanda Kukulski / 要旨: The endoplasmic reticulum and mitochondria are main hubs of eukaryotic membrane biogenesis that rely on lipid exchange via membrane contact sites, but the underpinning mechanisms remain poorly ...The endoplasmic reticulum and mitochondria are main hubs of eukaryotic membrane biogenesis that rely on lipid exchange via membrane contact sites, but the underpinning mechanisms remain poorly understood. In yeast, tethering and lipid transfer between the two organelles is mediated by the endoplasmic reticulum-mitochondria encounter structure (ERMES), a four-subunit complex of unresolved stoichiometry and architecture. Here we determined the molecular organization of ERMES within Saccharomyces cerevisiae cells using integrative structural biology by combining quantitative live imaging, cryo-correlative microscopy, subtomogram averaging and molecular modelling. We found that ERMES assembles into approximately 25 discrete bridge-like complexes distributed irregularly across a contact site. Each bridge consists of three synaptotagmin-like mitochondrial lipid binding protein domains oriented in a zig-zag arrangement. Our molecular model of ERMES reveals a pathway for lipids. These findings resolve the in situ supramolecular architecture of a major inter-organelle lipid transfer machinery and provide a basis for the mechanistic understanding of lipid fluxes in eukaryotic cells.
ダウンロード / ファイル: emd_16872.map.gz / 形式: CCP4 / 大きさ: 6.6 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Subtomogram average (STA) map of long ERMES bridge structures. The data set of all bridges was split into halves according to bridge length. The map has been aligned to the STA map of short bridges.
全体 : Budding yeast cells expressing Mdm34-mNeonGreen, a component of t...
全体
名称: Budding yeast cells expressing Mdm34-mNeonGreen, a component of the ER-mitochondria encounter structure (ERMES).
要素
細胞: Budding yeast cells expressing Mdm34-mNeonGreen, a component of the ER-mitochondria encounter structure (ERMES).
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超分子 #1: Budding yeast cells expressing Mdm34-mNeonGreen, a component of t...
超分子
名称: Budding yeast cells expressing Mdm34-mNeonGreen, a component of the ER-mitochondria encounter structure (ERMES). タイプ: cell / ID: 1 / 親要素: 0 詳細: Yeast cells were cryo-FIB-milled, imaged by cryo-FM and electron cryo-tomograms were acquired at localisations of Mdm34-mNeonGreen fluorescent signals.
由来(天然)
生物種: Saccharomyces cerevisiae (パン酵母) / 株: S288C
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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
サブトモグラム平均法
試料の集合状態
cell
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試料調製
緩衝液
pH: 6 詳細: Synthetic complete medium without tryptophan, with 2% glucose and 15% dextran
解像度のタイプ: BY AUTHOR / 解像度: 29.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF 詳細: This STA map was obtained by using half of the subtomograms that were used to obtain the map of all ERMES bridges (1098 subtomograms). The data set was split according to bridge length; here ...詳細: This STA map was obtained by using half of the subtomograms that were used to obtain the map of all ERMES bridges (1098 subtomograms). The data set was split according to bridge length; here the half containing the longer bridges was used for STA. 使用したサブトモグラム数: 549