- EMDB-12053: Drosophila melanogaster TRAPP C8, C12 and C13 region map from the... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-12053
タイトル
Drosophila melanogaster TRAPP C8, C12 and C13 region map from the TRAPPIII complex
マップデータ
cryoEM map of TRAPPC8, C12 and C13 region of the TRAPPIII complex, obtained after multibody refinement of the whole TRAPPIII map.
試料
複合体: TRAPPIII complex
タンパク質・ペプチド: FI18195p1
キーワード
Golgi / GEFS / Rab1 / TRAPP / EXOCYTOSIS
機能・相同性
機能・相同性情報
RAB GEFs exchange GTP for GDP on RABs / TRAPPIII protein complex / TRAPP complex / Golgi vesicle transport / endoplasmic reticulum to Golgi vesicle-mediated transport / Golgi apparatus 類似検索 - 分子機能
TRAPPC8, C-terminal, arthropods / TRAPP III complex, Trs85 / ER-Golgi trafficking TRAPP I complex 85 kDa subunit 類似検索 - ドメイン・相同性
ジャーナル: EMBO J / 年: 2021 タイトル: Cryo-EM structure of metazoan TRAPPIII, the multi-subunit complex that activates the GTPase Rab1. 著者: Antonio Galindo / Vicente J Planelles-Herrero / Gianluca Degliesposti / Sean Munro / 要旨: The TRAPP complexes are nucleotide exchange factors that play essential roles in membrane traffic and autophagy. TRAPPII activates Rab11, and TRAPPIII activates Rab1, with the two complexes sharing a ...The TRAPP complexes are nucleotide exchange factors that play essential roles in membrane traffic and autophagy. TRAPPII activates Rab11, and TRAPPIII activates Rab1, with the two complexes sharing a core of small subunits that affect nucleotide exchange but being distinguished by specific large subunits that are essential for activity in vivo. Crystal structures of core subunits have revealed the mechanism of Rab activation, but how the core and the large subunits assemble to form the complexes is unknown. We report a cryo-EM structure of the entire Drosophila TRAPPIII complex. The TRAPPIII-specific subunits TRAPPC8 and TRAPPC11 hold the catalytic core like a pair of tongs, with TRAPPC12 and TRAPPC13 positioned at the joint between them. TRAPPC2 and TRAPPC2L link the core to the two large arms, with the interfaces containing residues affected by disease-causing mutations. The TRAPPC8 arm is positioned such that it would contact Rab1 that is bound to the core, indicating how the arm could determine the specificity of the complex. A lower resolution structure of TRAPPII shows a similar architecture and suggests that the TRAPP complexes evolved from a single ur-TRAPP.
名称: TRAPPIII complex / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: Partial model of the TRAPP C8 subunits from the TRAPP C8, C12 and C13 map. Part of the TRAPPIII complex
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 285.15 K / 装置: FEI VITROBOT MARK III
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電子顕微鏡法
顕微鏡
TFS KRIOS
詳細
32% of the images were acquiring tilted the stage 19 degrees.
撮影
フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: COUNTING / 撮影したグリッド数: 4 / 実像数: 3671 / 平均露光時間: 0.8 sec. / 平均電子線量: 30.0 e/Å2 詳細: 1190 from the whole dataset were collected with the stage tilted at 19 degrees