National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
P01 HL020948
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM135343
米国
引用
ジャーナル: Life Sci Alliance / 年: 2020 タイトル: Structure of human Dispatched-1 provides insights into Hedgehog ligand biogenesis. 著者: Hongwen Chen / Yang Liu / Xiaochun Li / 要旨: Hedgehog (HH) signaling is essential for metazoan development. The HH ligand is secreted into the extracellular space by a cell surface protein named Dispatched-1 (DISP1). Here, we report the cryo-EM ...Hedgehog (HH) signaling is essential for metazoan development. The HH ligand is secreted into the extracellular space by a cell surface protein named Dispatched-1 (DISP1). Here, we report the cryo-EM structure of human DISP1 protein. DISP1 contains 12 transmembrane helices (TMs) and two extracellular domains (ECDs). Its ECDs reveal an open state, in contrast to its structural homologues PTCH1 and NPC1, whose extracellular/luminal domains adopt a closed state. The low-resolution structure of the DISP1 complex with dual lipid-modified HH ligand reveals how the ECDs of DISP1 engage with HH ligand. Moreover, several cholesterol-like molecules are found in the TMs, implying a transport-like function of DISP1.
電子線照射量: 62 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k)
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解析
ソフトウェア
名称: REFMAC / バージョン: 5.8.0135 / 分類: 精密化
EMソフトウェア
名称: RELION / カテゴリ: 分類
CTF補正
タイプ: PHASE FLIPPING ONLY
3次元再構成
解像度: 4.53 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 400432 / クラス平均像の数: 2 / 対称性のタイプ: POINT
精密化
解像度: 4.54→213.25 Å / Cor.coef. Fo:Fc: 0.736 / SU B: 72.333 / SU ML: 0.879 / ESU R: 0.39 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Rwork
0.46296
-
-
obs
0.46296
216926
100 %
溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK