ジャーナル: Cell Rep / 年: 2025 タイトル: The Myo2 adaptor Ldm1 and its receptor Ldo16 mediate actin-dependent lipid droplet motility. 著者: Xue-Tong Zhao / Duy Trong Vien Diep / Louis Percifull / Rebecca Martina Fausten / Marie Hugenroth / Pascal Höhne / Beatriz Leite / Bianca Marie Esch / Javier Collado / Jenny Keller / Stephan ...著者: Xue-Tong Zhao / Duy Trong Vien Diep / Louis Percifull / Rebecca Martina Fausten / Marie Hugenroth / Pascal Höhne / Beatriz Leite / Bianca Marie Esch / Javier Collado / Jenny Keller / Stephan Wilmes / Meryem Aysenur Turhan / Mike Wälte / Thomas Becker / Daniel Kümmel / Christian Schuberth / Rubén Fernández-Busnadiego / Florian Fröhlich / Roland Wedlich-Söldner / Maria Bohnert / 要旨: Organelle motility enables strategic cellular reorganizations. In yeast, this process depends on the actin cytoskeleton, type V myosin motor proteins, and organelle-specific myosin adaptor proteins. ...Organelle motility enables strategic cellular reorganizations. In yeast, this process depends on the actin cytoskeleton, type V myosin motor proteins, and organelle-specific myosin adaptor proteins. While the myosin adaptors for most organelles are known, the coupling of myosin to lipid droplets (LDs), the cellular lipid storage organelles, remained enigmatic. Using genome-wide screening, we identified Ldm1 (lipid droplet motility 1/Yer085c) as a myosin adaptor. Ldm1 binds to the globular tail domain of the myosin Myo2 and to the LD surface protein Ldo16 to enable actin-dependent LD motility. Ldo16 has additional roles in LD contact sites to the vacuole and the endoplasmic reticulum, suggesting a coordination of LD motility and organelle tethering. Ldm1 has a second role in mitochondrial transport, and elevated Ldm1 levels rescue defects of the mitochondrial Myo2-adaptors Mmr1/Ypt11. Our work identifies the molecular machinery for LD motility and contributes to a comprehensive understanding of acto-myosin-based cellular reorganization.
A: 14950.4 Å / B: 14950.4 Å / C: 4672.0 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 : Tomogram of yeast cell overexpressing Ldm1, treated with alpha-fa...
全体
名称: Tomogram of yeast cell overexpressing Ldm1, treated with alpha-factor (unbudded region)
要素
細胞: Tomogram of yeast cell overexpressing Ldm1, treated with alpha-factor (unbudded region)
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超分子 #1: Tomogram of yeast cell overexpressing Ldm1, treated with alpha-fa...
超分子
名称: Tomogram of yeast cell overexpressing Ldm1, treated with alpha-factor (unbudded region) タイプ: cell / ID: 1 / 親要素: 0 / 詳細: from FIB-milled yeast lamella
由来(天然)
生物種: Saccharomyces cerevisiae (パン酵母)
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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: 7.5
凍結
凍結剤: ETHANE-PROPANE
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: 0.05 / 集束イオンビーム - 時間: 3600 / 集束イオンビーム - 温度: 83 K / 集束イオンビーム - Initial thickness: 5000 / 集束イオンビーム - 最終 厚さ: 120 集束イオンビーム - 詳細: The value given for _em_focused_ion_beam.instrument is Aquilos 2. This is not in a list of allowed values {'DB235', 'OTHER'} so OTHER is written into the XML file.