ジャーナル: Nat Commun / 年: 2019 タイトル: Structures of autoinhibited and polymerized forms of CARD9 reveal mechanisms of CARD9 and CARD11 activation. 著者: Michael J Holliday / Axel Witt / Alejandro Rodríguez Gama / Benjamin T Walters / Christopher P Arthur / Randal Halfmann / Alexis Rohou / Erin C Dueber / Wayne J Fairbrother / 要旨: CARD9 and CARD11 drive immune cell activation by nucleating Bcl10 polymerization, but are held in an autoinhibited state prior to stimulation. Here, we elucidate the structural basis for this ...CARD9 and CARD11 drive immune cell activation by nucleating Bcl10 polymerization, but are held in an autoinhibited state prior to stimulation. Here, we elucidate the structural basis for this autoinhibition by determining the structure of a region of CARD9 that includes an extensive interface between its caspase recruitment domain (CARD) and coiled-coil domain. We demonstrate, for both CARD9 and CARD11, that disruption of this interface leads to hyperactivation in cells and to the formation of Bcl10-templating filaments in vitro, illuminating the mechanism of action of numerous oncogenic mutations of CARD11. These structural insights enable us to characterize two similar, yet distinct, mechanisms by which autoinhibition is relieved in the course of canonical CARD9 or CARD11 activation. We also dissect the molecular determinants of helical template assembly by solving the structure of the CARD9 filament. Taken together, these findings delineate the structural mechanisms of inhibition and activation within this protein family.
タンパク質・ペプチド: Caspase recruitment domain-containing protein 9
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超分子 #1: Helical assembly of the CARD9 CARD.
超分子
名称: Helical assembly of the CARD9 CARD. / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: Formed from CARD9 2-152 dimer with an I107E mutation, purified with 1:1 Zn. 1 mM EDTA was added to 0.5 mM protein, followed by 10 minute incubation at 25C.
由来(天然)
生物種: Homo sapiens (ヒト)
分子量
理論値: 34.0 kDa/nm
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分子 #1: Caspase recruitment domain-containing protein 9
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV 詳細: Sample was incubated on the grid for 1 minute, subsequently washed/blotted 6 times in buffer, followed by addition of 3.5 ul buffer, which was blotted by vitrobot for 5 seconds prior to plunging..
詳細
Formed from CARD9 2-152 dimer with an I107E mutation, purified with 1:1 Zn. 1 mM EDTA was added to 0.5 mM protein, followed by 10 minute incubation at 25C. Sample was subsequently diluted 1:5 before adding to grid.
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電子顕微鏡法
顕微鏡
FEI TITAN KRIOS
特殊光学系
エネルギーフィルター - スリット幅: 20 eV
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 / デジタル化 - サイズ - 横: 3838 pixel / デジタル化 - サイズ - 縦: 3710 pixel / デジタル化 - 画像ごとのフレーム数: 1-40 / 撮影したグリッド数: 1 / 実像数: 4403 / 平均露光時間: 10.0 sec. / 平均電子線量: 50.9 e/Å2 / 詳細: Collected in movie-mode at 4 frames per second
想定した対称性 - らせんパラメータ - Δz: 5.11 Å 想定した対称性 - らせんパラメータ - ΔΦ: -101.6 ° 想定した対称性 - らせんパラメータ - 軸対称性: C1 (非対称) 解像度のタイプ: BY AUTHOR / 解像度: 4.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: FREALIGN (ver. 9.11) 詳細: A 5.0 A high-resolution limit was used for particle alignment in frealign. 使用した粒子像数: 31908
Segment selection
選択した数: 141592 ソフトウェア:
名称
詳細
EMAN2
Filaments were manually selected using e2helixboxer.py.
RELION (ver. 2.1)
Segments were extracted from filaments using RELION.
詳細: Filaments were manually selected using e2helixboxer.py. Segments were extracted from filaments using RELION, using a 30 A shift between particles.
初期モデル
モデルのタイプ: OTHER 詳細: Ab initio 3D reconstruction was generated in C1 in cisTEM and used as a startup model.
最終 角度割当
タイプ: NOT APPLICABLE / ソフトウェア - 名称: FREALIGN (ver. 9.11) 詳細: Final assignment was performed in helical frealign using helical parameters of 5.11-A rise and 101.6 degree rotation.
Chain - Chain ID: A / Chain - Residue range: 8-95 / Chain - Source name: PDB / Chain - Initial model type: experimental model
詳細
"Fit in map" in UCSF Chimera was used to fit the previously determined, lowest energy NMR solution structure (PDB ID 6E26) into the sharpened density and to generate 9 symmetry-mates according to the determined helical parameters. The map was then iteratively refined in Phenix and Coot, maintaining strict non-crystallographic symmetry among the CARDs.