+
データを開く
-
基本情報
登録情報 | データベース: PDB / ID: 8tr9 | ||||||
---|---|---|---|---|---|---|---|
タイトル | Cryo-EM structure of transglutaminase 2 bound to GDP | ||||||
![]() | Protein-glutamine gamma-glutamyltransferase 2 | ||||||
![]() | TRANSFERASE / GDP / Complex / Signaling / G-protein / Cancer / cryo-EM | ||||||
機能・相同性 | ![]() protein deamination / histone serotonyltransferase activity / histone dopaminyltransferase activity / peptide noradrenalinyltransferase activity / peptide histaminyltransferase activity / cellular response to serotonin / regulation of apoptotic cell clearance / protein-glutamine glutaminase activity / protein-glutamine glutaminase / protein-glutamine gamma-glutamyltransferase ...protein deamination / histone serotonyltransferase activity / histone dopaminyltransferase activity / peptide noradrenalinyltransferase activity / peptide histaminyltransferase activity / cellular response to serotonin / regulation of apoptotic cell clearance / protein-glutamine glutaminase activity / protein-glutamine glutaminase / protein-glutamine gamma-glutamyltransferase / positive regulation of mitochondrial calcium ion concentration / salivary gland cavitation / protein-glutamine gamma-glutamyltransferase activity / negative regulation of endoplasmic reticulum calcium ion concentration / dopamine secretion / peptide cross-linking / branching involved in salivary gland morphogenesis / cellular response to dopamine / positive regulation of small GTPase mediated signal transduction / 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素 / cellular response to cocaine / apoptotic cell clearance / positive regulation of neurogenesis / positive regulation of sprouting angiogenesis / 転移酵素; アシル基を移すもの; アミノアシル基以外のアシル基を移すもの / positive regulation of GTPase activity / extracellular matrix / positive regulation of cell adhesion / bone development / protein homooligomerization / nucleosome / peptidase activity / : / phospholipase C-activating G protein-coupled receptor signaling pathway / gene expression / regulation of apoptotic process / positive regulation of apoptotic process / focal adhesion / calcium ion binding / GTP binding / chromatin / perinuclear region of cytoplasm / endoplasmic reticulum / mitochondrion / proteolysis / extracellular exosome / nucleus / plasma membrane / cytosol 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
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: 3.2 Å | ||||||
![]() | Aplin, C. / Cerione, R.A. | ||||||
資金援助 | ![]()
| ||||||
![]() | ![]() タイトル: Distinct conformational states enable transglutaminase 2 to promote cancer cell survival versus cell death. 著者: Cody Aplin / Kara A Zielinski / Suzette Pabit / Deborah Ogunribido / William P Katt / Lois Pollack / Richard A Cerione / Shawn K Milano / ![]() 要旨: Transglutaminase 2 (TG2) is a GTP-binding, protein-crosslinking enzyme that has been investigated as a therapeutic target for Celiac disease, neurological disorders, and aggressive cancers. TG2 has ...Transglutaminase 2 (TG2) is a GTP-binding, protein-crosslinking enzyme that has been investigated as a therapeutic target for Celiac disease, neurological disorders, and aggressive cancers. TG2 has been suggested to adopt two conformational states that regulate its functions: a GTP-bound, closed conformation, and a calcium-bound, crosslinking-active open conformation. TG2 mutants that constitutively adopt an open conformation are cytotoxic to cancer cells. Thus, small molecules that bind and stabilize the open conformation of TG2 could offer a new therapeutic strategy. Here, we investigate TG2, using static and time-resolved small-angle X-ray scattering (SAXS) and single-particle cryoelectron microscopy (cryo-EM), to determine the conformational states responsible for conferring its biological effects. We also describe a newly developed TG2 inhibitor, LM11, that potently kills glioblastoma cells and use SAXS to investigate how LM11 affects the conformational states of TG2. Using SAXS and cryo-EM, we show that guanine nucleotides bind and stabilize a monomeric closed conformation while calcium binds to an open state that can form higher order oligomers. SAXS analysis suggests how a TG2 mutant that constitutively adopts the open state binds nucleotides through an alternative mechanism to wildtype TG2. Furthermore, we use time resolved SAXS to show that LM11 increases the ability of calcium to bind and stabilize an open conformation, which is not reversible by guanine nucleotides and is cytotoxic to cancer cells. Taken together, our findings demonstrate that the conformational dynamics of TG2 are more complex than previously suggested and highlight how conformational stabilization of TG2 by LM11 maintains TG2 in a cytotoxic conformational state. | ||||||
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 | ![]() | 131.2 KB | 表示 | ![]() |
---|---|---|---|---|
PDB形式 | ![]() | 100.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
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 | ![]() 41574MC 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
#1: タンパク質 | 分子量: 77412.680 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 参照: UniProt: P21980, protein-glutamine gamma-glutamyltransferase, 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素, protein-glutamine glutaminase, 転移酵素; ...参照: UniProt: P21980, protein-glutamine gamma-glutamyltransferase, 加水分解酵素; プロテアーゼ; ペプチド結合加水分解酵素, protein-glutamine glutaminase, 転移酵素; アシル基を移すもの; アミノアシル基以外のアシル基を移すもの |
---|---|
#2: 化合物 | ChemComp-GDP / |
研究の焦点であるリガンドがあるか | Y |
Has protein modification | N |
-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: Transglutaminase 2 bound to GDP / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
---|---|
分子量 | 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 |
試料 | 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: UltrAuFoil R1.2/1.3 |
急速凍結 | 凍結剤: ETHANE |
-
電子顕微鏡撮影
実験機器 | ![]() モデル: Talos Arctica / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TALOS ARCTICA |
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): 2400 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 51.1 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
-
解析
CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3次元再構成 | 解像度: 3.2 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 136297 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 交差検証法: NONE 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 99.32 Å2 | ||||||||||||||||||||||||
拘束条件 |
|