National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM121772
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM107214
米国
引用
ジャーナル: Nat Struct Mol Biol / 年: 2022 タイトル: Structural basis for Parkinson's disease-linked LRRK2's binding to microtubules. 著者: David M Snead / Mariusz Matyszewski / Andrea M Dickey / Yu Xuan Lin / Andres E Leschziner / Samara L Reck-Peterson / 要旨: Leucine-rich repeat kinase 2 (LRRK2) is one of the most commonly mutated genes in familial Parkinson's disease (PD). Under some circumstances, LRRK2 co-localizes with microtubules in cells, an ...Leucine-rich repeat kinase 2 (LRRK2) is one of the most commonly mutated genes in familial Parkinson's disease (PD). Under some circumstances, LRRK2 co-localizes with microtubules in cells, an association enhanced by PD mutations. We report a cryo-EM structure of the catalytic half of LRRK2, containing its kinase, in a closed conformation, and GTPase domains, bound to microtubules. We also report a structure of the catalytic half of LRRK1, which is closely related to LRRK2 but is not linked to PD. Although LRRK1's structure is similar to that of LRRK2, we find that LRRK1 does not interact with microtubules. Guided by these structures, we identify amino acids in LRRK2's GTPase that mediate microtubule binding; mutating them disrupts microtubule binding in vitro and in cells, without affecting LRRK2's kinase activity. Our results have implications for the design of therapeutic LRRK2 kinase inhibitors.
詳細: This is the final dilution buffer. The incubation buffer consisted of 1x BRB80, 10% glycerol, 1mM DTT, 1mM GTP, 1mM MgCl2, 10 uM taxol, and 5 uM MLi-2. Sample was diluted 3-fold right before ...詳細: This is the final dilution buffer. The incubation buffer consisted of 1x BRB80, 10% glycerol, 1mM DTT, 1mM GTP, 1mM MgCl2, 10 uM taxol, and 5 uM MLi-2. Sample was diluted 3-fold right before freezing with the final buffer.
グリッド
モデル: Homemade / 材質: COPPER / メッシュ: 300 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: LACEY / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 45 sec. 詳細: EMS LC-300 lacey grid used (not homemade, but can't choose EMS as the manufacturer)
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K
詳細
4.5 uM of LRRK2RCKW (I2020T) was allowed to incubate with 2.25 uM of tubulin dimer, causing both to co-polymerize. 5 uM of MLi-2 was present as well. The sample was diluted 3-fold right before freezing (1.5 uM LRRK2RCKW concentration final).
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電子顕微鏡法
顕微鏡
FEI TALOS ARCTICA
撮影
フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / 撮影したグリッド数: 2 / 平均露光時間: 10.0 sec. / 平均電子線量: 55.0 e/Å2 / 詳細: 250 ms frames
選択した数: 557577 詳細: Filament Autopicker with templates created by manual picking. This is before symmetry expansion.
初期モデル
モデルのタイプ: NONE 詳細: Featureless cylinder for the original helical reconstruction, then subunit from the helical reconstruction after reboxing and symmetry expansion.
最終 再構成
想定した対称性 - 点群: C1 (非対称) / 解像度のタイプ: BY AUTHOR / 解像度: 5.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: cryoSPARC (ver. 3.2) ソフトウェア - 詳細: local refinement, with non-uniform refinement turned off 使用した粒子像数: 99854
初期 角度割当
タイプ: NOT APPLICABLE
最終 角度割当
タイプ: NOT APPLICABLE
FSC曲線 (解像度の算出)
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原子モデル構築 1
詳細
Used AlphaFold model as initial model (Q5S007) using only the ROC domain. TUB1 was added to the initial refinement to prevent ROC model from entering density reserved for the microtubule. TUB1 was discarded after the initial refinement.
精密化
プロトコル: FLEXIBLE FIT
得られたモデル
PDB-7thz: Structure of Leucine Rich Repeat Kinase 2's ROC domain interacting with the microtubule facing the plus end