+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 8k9t | ||||||
---|---|---|---|---|---|---|---|
タイトル | Cryo-EM structure of the products-bound PGAP1(Bst1)-S327A from Chaetonium thermophilum | ||||||
![]() |
| ||||||
![]() | MEMBRANE PROTEIN / Bst1 / Glycosylphosphatidylinositol / GPI anchoring / GPI-AP / GPI-AP remodelase / Integral membrane enzyme / Lipase / Lipid remodeling / Membrane enzyme / Nanodisc / PGAP1 / TGP / Thermostable green fluorescence protein / Transmembrane enzyme / Triad enzyme. | ||||||
機能・相同性 | ![]() GPI anchor metabolic process / phosphatidylinositol deacylase activity / regulation of lipopolysaccharide-mediated signaling pathway / negative regulation of complement activation / negative regulation of complement activation, classical pathway / regulation of complement-dependent cytotoxicity / regulation of complement activation / T cell mediated immunity / respiratory burst / positive regulation of CD4-positive, alpha-beta T cell activation ...GPI anchor metabolic process / phosphatidylinositol deacylase activity / regulation of lipopolysaccharide-mediated signaling pathway / negative regulation of complement activation / negative regulation of complement activation, classical pathway / regulation of complement-dependent cytotoxicity / regulation of complement activation / T cell mediated immunity / respiratory burst / positive regulation of CD4-positive, alpha-beta T cell activation / positive regulation of CD4-positive, alpha-beta T cell proliferation / Class B/2 (Secretin family receptors) / ficolin-1-rich granule membrane / endoplasmic reticulum to Golgi vesicle-mediated transport / side of membrane / COPI-mediated anterograde transport / transport vesicle / endoplasmic reticulum-Golgi intermediate compartment membrane / bioluminescence / secretory granule membrane / generation of precursor metabolites and energy / complement activation, classical pathway / Regulation of Complement cascade / positive regulation of T cell cytokine production / protein transport / virus receptor activity / positive regulation of cytosolic calcium ion concentration / 加水分解酵素; エステル加水分解酵素 / membrane raft / Golgi membrane / innate immune response / lipid binding / Neutrophil degranulation / endoplasmic reticulum membrane / cell surface / extracellular exosome / extracellular region / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() synthetic construct (人工物) ![]() | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.66 Å | ||||||
![]() | Li, T. / Hong, J. / Qu, Q. / Li, D. | ||||||
資金援助 | ![]()
| ||||||
![]() | ![]() タイトル: Molecular basis of the inositol deacylase PGAP1 involved in quality control of GPI-AP biogenesis. 著者: Jingjing Hong / Tingting Li / Yulin Chao / Yidan Xu / Zhini Zhu / Zixuan Zhou / Weijie Gu / Qianhui Qu / Dianfan Li / ![]() 要旨: The secretion and quality control of glycosylphosphatidylinositol-anchored proteins (GPI-APs) necessitates post-attachment remodeling initiated by the evolutionarily conserved PGAP1, which deacylates ...The secretion and quality control of glycosylphosphatidylinositol-anchored proteins (GPI-APs) necessitates post-attachment remodeling initiated by the evolutionarily conserved PGAP1, which deacylates the inositol in nascent GPI-APs. Impairment of PGAP1 activity leads to developmental diseases in humans and fatality and infertility in animals. Here, we present three PGAP1 structures (2.66-2.84 Å), revealing its 10-transmembrane architecture and product-enzyme interaction details. PGAP1 holds GPI-AP acyl chains in an optimally organized, guitar-shaped cavity with apparent energetic penalties from hydrophobic-hydrophilic mismatches. However, abundant glycan-mediated interactions in the lumen counterbalance these repulsions, likely conferring substrate fidelity and preventing off-target hydrolysis of bulk membrane lipids. Structural and biochemical analyses uncover a serine hydrolase-type catalysis with atypical features and imply mechanisms for substrate entrance and product release involving a drawing compass movement of GPI-APs. Our findings advance the mechanistic understanding of GPI-AP remodeling. | ||||||
履歴 |
|
-
構造の表示
構造ビューア | 分子: ![]() ![]() |
---|
-
ダウンロードとリンク
-
ダウンロード
PDBx/mmCIF形式 | ![]() | 206.5 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 148.3 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 785.9 KB | 表示 | ![]() |
---|---|---|---|---|
文書・詳細版 | ![]() | 801 KB | 表示 | |
XML形式データ | ![]() | 21.5 KB | 表示 | |
CIF形式データ | ![]() | 32.1 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 36997MC ![]() 8k9qC ![]() 8k9rC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
---|---|
類似構造データ | 類似検索 - 機能・相同性 ![]() |
-
リンク
-
集合体
登録構造単位 | ![]()
|
---|---|
1 |
|
-
要素
-タンパク質 , 2種, 2分子 AB
#1: タンパク質 | 分子量: 161345.547 Da / 分子数: 1 / 変異: S327A,W148S,I166V,Q168Y,I202R / 由来タイプ: 組換発現 詳細: Residues 1-1186 is GPI inositol-deacylase (Uniprot ID G0S652) with a S327A mutation. Residues 1187-1200 is the linker with a 3 C protease digestion site. Residues 1201-1435 is a fused mCherry ...詳細: Residues 1-1186 is GPI inositol-deacylase (Uniprot ID G0S652) with a S327A mutation. Residues 1187-1200 is the linker with a 3 C protease digestion site. Residues 1201-1435 is a fused mCherry protein (Uniprot ID A0A366VY15 with the following four mutations that extend its fluorescence lifetime: W148S, I166V, Q168Y and I202R). Residues 1436-1447 is the linker with a His tag. 由来: (組換発現) ![]() ![]() 遺伝子: CTHT_0034210, DS885_16260 / 発現宿主: ![]() 参照: UniProt: G0S652, UniProt: A0A366VY15, 加水分解酵素; エステル加水分解酵素 |
---|---|
#2: タンパク質 | 分子量: 29894.154 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: Residues 1-6 is a linker. Residues 7-231 is a thermostable green fluorescent protein (PDB entry 4TZA, residue 5-229). Residues 232-263 is a linker with an expression tag. Residues 264-272 is ...詳細: Residues 1-6 is a linker. Residues 7-231 is a thermostable green fluorescent protein (PDB entry 4TZA, residue 5-229). Residues 232-263 is a linker with an expression tag. Residues 264-272 is human CD55 (Uniprot ID P08174, residue P345-S353) 由来: (組換発現) synthetic construct (人工物), (組換発現) ![]() 遺伝子: CD55, CR, DAF / 発現宿主: ![]() |
-糖 , 2種, 3分子 ![](data/chem/img/MAN.gif)
![](data/chem/img/PA1.gif)
![](data/chem/img/PA1.gif)
#4: 糖 | #6: 糖 | ChemComp-PA1 / | |
---|
-非ポリマー , 5種, 6分子 ![](data/chem/img/PLM.gif)
![](data/chem/img/05E.gif)
![](data/chem/img/LYI.gif)
![](data/chem/img/CLR.gif)
![](data/chem/img/80Y.gif)
![](data/chem/img/05E.gif)
![](data/chem/img/LYI.gif)
![](data/chem/img/CLR.gif)
![](data/chem/img/80Y.gif)
#3: 化合物 | ChemComp-PLM / | ||
---|---|---|---|
#5: 化合物 | ChemComp-05E / | ||
#7: 化合物 | ChemComp-LYI / [( | ||
#8: 化合物 | #9: 化合物 | ChemComp-80Y / | |
-詳細
研究の焦点であるリガンドがあるか | Y |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-
試料調製
構成要素 | 名称: Complex of PGAP1 with a chimera GPI-anchored protein タイプ: COMPLEX / Entity ID: #1 / 由来: MULTIPLE SOURCES | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
分子量 | 値: 0.194 MDa / 実験値: NO | ||||||||||||||||||||
由来(天然) | 生物種: ![]() | ||||||||||||||||||||
由来(組換発現) | 生物種: ![]() | ||||||||||||||||||||
緩衝液 | pH: 7.5 | ||||||||||||||||||||
緩衝液成分 |
| ||||||||||||||||||||
試料 | 濃度: 14.9 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
-
電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 50 e/Å2 フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) |
-
解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3次元再構成 | 解像度: 2.66 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 353585 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
|