+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6h05 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
タイトル | Cryo-electron microscopic structure of the dihydrolipoamide succinyltransferase (E2) component of the human alpha-ketoglutarate (2-oxoglutarate) dehydrogenase complex [residues 218-453] | |||||||||||||||||||||
要素 | Dihydrolipoyllysine-residue succinyltransferase component of 2-oxoglutarate dehydrogenase complex, mitochondrial | |||||||||||||||||||||
キーワード | TRANSFERASE (転移酵素) / alpha-ketoglutarate dehydrogenase complex / 2-oxoglutarate dehydrogenase complex / dihydrolipoamide succinyltransferase / E2 component | |||||||||||||||||||||
機能・相同性 | 機能・相同性情報 succinyl-CoA metabolic process / : / L-lysine catabolic process to acetyl-CoA via saccharopine / oxoglutarate dehydrogenase complex / dihydrolipoyllysine-residue succinyltransferase / dihydrolipoyllysine-residue succinyltransferase activity / Lysine catabolism / Citric acid cycle (TCA cycle) / 2-oxoglutarate metabolic process / Glyoxylate metabolism and glycine degradation ...succinyl-CoA metabolic process / : / L-lysine catabolic process to acetyl-CoA via saccharopine / oxoglutarate dehydrogenase complex / dihydrolipoyllysine-residue succinyltransferase / dihydrolipoyllysine-residue succinyltransferase activity / Lysine catabolism / Citric acid cycle (TCA cycle) / 2-oxoglutarate metabolic process / Glyoxylate metabolism and glycine degradation / acyltransferase activity / centriolar satellite / クエン酸回路 / generation of precursor metabolites and energy / ミトコンドリアマトリックス / ミトコンドリア / 核質 / 生体膜 / 細胞核 / 細胞質基質 類似検索 - 分子機能 | |||||||||||||||||||||
生物種 | Homo sapiens (ヒト) | |||||||||||||||||||||
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: 2.9 Å | |||||||||||||||||||||
データ登録者 | Nagy, B. / Zambo, Z. / Hubert, A. / Polak, M. / Nemeria, N.S. / Novacek, J. / Jordan, F. / Adam-Vizi, V. / Ambrus, A. | |||||||||||||||||||||
資金援助 | ハンガリー, 米国, 6件
| |||||||||||||||||||||
引用 | ジャーナル: Biochim Biophys Acta Gen Subj / 年: 2021 タイトル: Structure of the dihydrolipoamide succinyltransferase (E2) component of the human alpha-ketoglutarate dehydrogenase complex (hKGDHc) revealed by cryo-EM and cross-linking mass ...タイトル: Structure of the dihydrolipoamide succinyltransferase (E2) component of the human alpha-ketoglutarate dehydrogenase complex (hKGDHc) revealed by cryo-EM and cross-linking mass spectrometry: Implications for the overall hKGDHc structure. 著者: Balint Nagy / Martin Polak / Oliver Ozohanics / Zsofia Zambo / Eszter Szabo / Agnes Hubert / Frank Jordan / Jiří Novaček / Vera Adam-Vizi / Attila Ambrus / 要旨: BACKGROUND: The human mitochondrial alpha-ketoglutarate dehydrogenase complex (hKGDHc) converts KG to succinyl-CoA and NADH. Malfunction of and reactive oxygen species generation by the hKGDHc as ...BACKGROUND: The human mitochondrial alpha-ketoglutarate dehydrogenase complex (hKGDHc) converts KG to succinyl-CoA and NADH. Malfunction of and reactive oxygen species generation by the hKGDHc as well as its E1-E2 subcomplex are implicated in neurodegenerative disorders, ischemia-reperfusion injury, E3-deficiency and cancers. 手法: We performed cryo-EM, cross-linking mass spectrometry (CL-MS) and molecular modeling analyses to determine the structure of the E2 component of the hKGDHc (hE2k); hE2k transfers a succinyl ...手法: We performed cryo-EM, cross-linking mass spectrometry (CL-MS) and molecular modeling analyses to determine the structure of the E2 component of the hKGDHc (hE2k); hE2k transfers a succinyl group to CoA and forms the structural core of hKGDHc. We also assessed the overall structure of the hKGDHc by negative-stain EM and modeling. RESULTS: We report the 2.9 Å resolution cryo-EM structure of the hE2k component. The cryo-EM map comprises density for hE2k residues 151-386 - the entire (inner) core catalytic domain plus a few ...RESULTS: We report the 2.9 Å resolution cryo-EM structure of the hE2k component. The cryo-EM map comprises density for hE2k residues 151-386 - the entire (inner) core catalytic domain plus a few additional residues -, while residues 1-150 are not observed due to the inherent flexibility of the N-terminal region. The structure of the latter segment was also determined by CL-MS and homology modeling. Negative-stain EM on in vitro assembled hKGDHc and previous data were used to build a putative overall structural model of the hKGDHc. CONCLUSIONS: The E2 core of the hKGDHc is composed of 24 hE2k chains organized in octahedral (8 × 3 type) assembly. Each lipoyl domain is oriented towards the core domain of an adjacent chain in ...CONCLUSIONS: The E2 core of the hKGDHc is composed of 24 hE2k chains organized in octahedral (8 × 3 type) assembly. Each lipoyl domain is oriented towards the core domain of an adjacent chain in the hE2k homotrimer. hE1k and hE3 are most likely tethered at the edges and faces, respectively, of the cubic hE2k assembly. GENERAL SIGNIFICANCE: The revealed structural information will support the future pharmacologically targeting of the hKGDHc. | |||||||||||||||||||||
履歴 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6h05.cif.gz | 55.5 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb6h05.ent.gz | 40.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6h05.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/h0/6h05 ftp://data.pdbj.org/pub/pdb/validation_reports/h0/6h05 | HTTPS FTP |
---|
-関連構造データ
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
| x 24
-要素
#1: タンパク質 | 分子量: 45543.004 Da / 分子数: 1 / 由来タイプ: 組換発現 詳細: N-terminal Twin-Strep (affinity) tag with proteolytic cleavage site and linkers: MASWSHPQFEKGGGSGGGSGGSAWSHPQFEKLEVLFQGPG Density was found for 236 residues [218-453] 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: DLST, DLTS / プラスミド: pET52b+ / 発現宿主: Escherichia coli BL21(DE3) (大腸菌) 参照: UniProt: P36957, dihydrolipoyllysine-residue succinyltransferase |
---|
-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: Affinity purified human dihydrolipoamide succinyltransferase タイプ: COMPLEX 詳細: Protein in 100 mM Tris-HCl, 150 mM NaCl, 1 mM EDTA, pH 8.0. Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
分子量 | 実験値: NO | ||||||||||||||||||||
由来(天然) | 生物種: Homo sapiens (ヒト) | ||||||||||||||||||||
由来(組換発現) | 生物種: Escherichia coli BL21(DE3) (大腸菌) / プラスミド: pET52b+ | ||||||||||||||||||||
緩衝液 | pH: 8 | ||||||||||||||||||||
緩衝液成分 |
| ||||||||||||||||||||
試料 | 濃度: 1 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: This sample was highly purified and monodisperse. | ||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 200 divisions/in. / グリッドのタイプ: Quantifoil R2/1 | ||||||||||||||||||||
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: 298 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: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: OTHER |
電子レンズ | モード: BRIGHT FIELDBright-field microscopy |
撮影 | 平均露光時間: 1 sec. / 電子線照射量: 48.8 e/Å2 / 検出モード: INTEGRATING フィルム・検出器のモデル: FEI FALCON II (4k x 4k) 撮影したグリッド数: 1 |
-解析
EMソフトウェア |
| ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 1533026 詳細: Manual picking for the templates was performed by the EMAN2 E2boxer program. Automated selection was then applied by CryoSPARC. | ||||||||||||||||||
対称性 | 点対称性: O (正8面体型対称) | ||||||||||||||||||
3次元再構成 | 解像度: 2.9 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 740101 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||
原子モデル構築 | プロトコル: RIGID BODY FIT 詳細: COOT was used for structure manipulations, while MOLPROBITY was applied for validation. |