- EMDB-12357: ordered protein arrays on the axoneme-facing surface of the outer... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-12357
タイトル
ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
マップデータ
subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
試料
細胞: subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
タンパク質・ペプチド: Glycerol kinase
タンパク質・ペプチド: Voltage-dependent anion-selective channel protein 2
Netherlands Organisation for Scientific Research (NWO)
740.018.007
オランダ
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2021 タイトル: In-cell structures of conserved supramolecular protein arrays at the mitochondria-cytoskeleton interface in mammalian sperm. 著者: Miguel Ricardo Leung / Riccardo Zenezini Chiozzi / Marc C Roelofs / Johannes F Hevler / Ravi Teja Ravi / Paula Maitan / Min Zhang / Heiko Henning / Elizabeth G Bromfield / Stuart C Howes / ...著者: Miguel Ricardo Leung / Riccardo Zenezini Chiozzi / Marc C Roelofs / Johannes F Hevler / Ravi Teja Ravi / Paula Maitan / Min Zhang / Heiko Henning / Elizabeth G Bromfield / Stuart C Howes / Bart M Gadella / Albert J R Heck / Tzviya Zeev-Ben-Mordehai / 要旨: Mitochondria-cytoskeleton interactions modulate cellular physiology by regulating mitochondrial transport, positioning, and immobilization. However, there is very little structural information ...Mitochondria-cytoskeleton interactions modulate cellular physiology by regulating mitochondrial transport, positioning, and immobilization. However, there is very little structural information defining mitochondria-cytoskeleton interfaces in any cell type. Here, we use cryofocused ion beam milling-enabled cryoelectron tomography to image mammalian sperm, where mitochondria wrap around the flagellar cytoskeleton. We find that mitochondria are tethered to their neighbors through intermitochondrial linkers and are anchored to the cytoskeleton through ordered arrays on the outer mitochondrial membrane. We use subtomogram averaging to resolve in-cell structures of these arrays from three mammalian species, revealing they are conserved across species despite variations in mitochondrial dimensions and cristae organization. We find that the arrays consist of boat-shaped particles anchored on a network of membrane pores whose arrangement and dimensions are consistent with voltage-dependent anion channels. Proteomics and in-cell cross-linking mass spectrometry suggest that the conserved arrays are composed of glycerol kinase-like proteins. Ordered supramolecular assemblies may serve to stabilize similar contact sites in other cell types in which mitochondria need to be immobilized in specific subcellular environments, such as in muscles and neurons.
ダウンロード / ファイル: emd_12357.map.gz / 形式: CCP4 / 大きさ: 501 KB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
A: 347.2 Å / B: 173.6 Å / C: 173.6 Å α=β=γ: 90.0 °
CCP4マップ ヘッダ情報:
mode
Image stored as Reals
Å/pix. X/Y/Z
4.34
4.34
4.34
M x/y/z
80
40
40
origin x/y/z
0.000
0.000
0.000
length x/y/z
347.200
173.600
173.600
α/β/γ
90.000
90.000
90.000
MAP C/R/S
1
2
3
start NC/NR/NS
0
0
0
NC/NR/NS
80
40
40
D min/max/mean
-0.625
0.848
-0.116
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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 : subtomogram average of ordered protein arrays on the axoneme-faci...
全体
名称: subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
要素
細胞: subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit)
タンパク質・ペプチド: Glycerol kinase
タンパク質・ペプチド: Voltage-dependent anion-selective channel protein 2
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超分子 #1: subtomogram average of ordered protein arrays on the axoneme-faci...
超分子
名称: subtomogram average of ordered protein arrays on the axoneme-facing surface of the outer mitochondrial membrane in pig sperm mitochondria (alignment focused on one unit) タイプ: cell / ID: 1 / 親要素: 0 / 含まれる分子: all
トモグラム数: 3 / 使用した粒子像数: 268 / 参照モデル: random particle from the dataset / ソフトウェア - 名称: PEET (ver. 1.13.0)
最終 角度割当
タイプ: OTHER / ソフトウェア - 名称: PEET (ver. 1.13.0)
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原子モデル構築 1
詳細
Homology models of pig glycerol kinase and VDAC2 were made using Robetta. Rigid body fitting was done with Chimera/ChimeraX. Putative GK proteins only fit in one orientation, but for VDAC proteins the rotation around the pore axis remains ambiguous.
精密化
プロトコル: RIGID BODY FIT
得られたモデル
PDB-7nie: putative glycerol kinase-like proteins anchored on an array of voltage dependent anion channels in the outer mitochondrial membrane of pig sperm mitochondria