[日本語] English
万見- EMDB-39334: Cryo-EM structure of human proteasome assembly intermediate preholo-2 -
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データを開く
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基本情報
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| タイトル | Cryo-EM structure of human proteasome assembly intermediate preholo-2 | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | Protein degradation / Proteasome / 20S proteasome / Assembly / Assembly chapreone / STRUCTURAL PROTEIN | |||||||||
| 機能・相同性 | 機能・相同性情報cerebellar granule cell precursor proliferation / purine ribonucleoside triphosphate binding / protein folding chaperone complex / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / proteasome core complex assembly / Somitogenesis / mitotic spindle assembly checkpoint signaling ...cerebellar granule cell precursor proliferation / purine ribonucleoside triphosphate binding / protein folding chaperone complex / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / proteasome core complex assembly / Somitogenesis / mitotic spindle assembly checkpoint signaling / proteasome binding / myofibril / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome assembly / chaperone-mediated protein complex assembly / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / proteolysis involved in protein catabolic process / proteasome complex / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / negative regulation of inflammatory response to antigenic stimulus / Degradation of AXIN / lipopolysaccharide binding / P-body / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Regulation of RUNX3 expression and activity / Vif-mediated degradation of APOBEC3G / Hedgehog 'on' state / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / MAPK6/MAPK4 signaling / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / nuclear matrix / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / KEAP1-NFE2L2 pathway / UCH proteinases / Downstream TCR signaling / Antigen processing: Ubiquitination & Proteasome degradation / peptidase activity / Neddylation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / ER-Phagosome pathway / regulation of inflammatory response / response to oxidative stress / secretory granule lumen / endopeptidase activity / molecular adaptor activity / ficolin-1-rich granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / positive regulation of canonical NF-kappaB signal transduction / Ub-specific processing proteases / nuclear body / cilium / ciliary basal body / ribosome / cadherin binding / intracellular membrane-bounded organelle / ubiquitin protein ligase binding 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.79 Å | |||||||||
データ登録者 | Han Y / Han Q / Tang Q / Zhang Y / Liu K | |||||||||
| 資金援助 | 中国, 2件
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引用 | ジャーナル: Sci Adv / 年: 2025タイトル: Molecular basis for the stepwise and faithful maturation of the 20 proteasome. 著者: Yaoyao Han / Qian Han / Qianqian Tang / Yixiao Zhang / Kai Liu / ![]() 要旨: The proteasome degrades most superfluous and damaged proteins, and its decline is associated with many diseases. As the proteolytic unit, the 20 proteasome is assembled from 28 subunits assisted by ...The proteasome degrades most superfluous and damaged proteins, and its decline is associated with many diseases. As the proteolytic unit, the 20 proteasome is assembled from 28 subunits assisted by chaperones PAC1/2/3/4 and POMP; then, it undergoes the maturation process, in which the proteolytic sites are activated and the assembly chaperones are cleared. However, mechanisms governing the maturation remain elusive. Here, we captured endogenous maturation intermediates of human 20 proteasome, which are low abundance and highly dynamic, and determined their structures by cryo-electron microscopy. Through structure-based functional studies, we identified the key switches that remodel and activate the proteolytic sites. Our results also revealed that the POMP degradation is tightly controlled by a dual-checking mechanism, while the α5 subunit senses POMP degradation to induce PAC1/2 release, achieving the full maturation. These findings elucidate mechanisms directing and safeguarding the proteasome maturation and set basis for building proteasomes to counteract the decline of protein degradation in aging and disease. | |||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
| マップデータ | emd_39334.map.gz | 48.5 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-39334-v30.xml emd-39334.xml | 32.5 KB 32.5 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_39334.png | 133.7 KB | ||
| Filedesc metadata | emd-39334.cif.gz | 8.7 KB | ||
| その他 | emd_39334_half_map_1.map.gz emd_39334_half_map_2.map.gz | 67.4 MB 67.4 MB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-39334 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-39334 | HTTPS FTP |
-検証レポート
| 文書・要旨 | emd_39334_validation.pdf.gz | 1.2 MB | 表示 | EMDB検証レポート |
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| 文書・詳細版 | emd_39334_full_validation.pdf.gz | 1.2 MB | 表示 | |
| XML形式データ | emd_39334_validation.xml.gz | 13.5 KB | 表示 | |
| CIF形式データ | emd_39334_validation.cif.gz | 16 KB | 表示 | |
| アーカイブディレクトリ | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-39334 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-39334 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 8yizMC ![]() 8yixC ![]() 8yiyC M: このマップから作成された原子モデル C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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| 「今月の分子」の関連する項目 |
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マップ
| ファイル | ダウンロード / ファイル: emd_39334.map.gz / 形式: CCP4 / 大きさ: 103 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
| ボクセルのサイズ | X=Y=Z: 1.055 Å | ||||||||||||||||||||||||||||||||||||
| 密度 |
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
| ファイル | emd_39334_half_map_1.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
-ハーフマップ: #1
| ファイル | emd_39334_half_map_2.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
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試料の構成要素
+全体 : Cryo-EM structure of human proteasome assembly intermediate preholo-2
+超分子 #1: Cryo-EM structure of human proteasome assembly intermediate preholo-2
+分子 #1: Proteasome subunit alpha type-2
+分子 #2: Proteasome subunit alpha type-4
+分子 #3: Proteasome subunit alpha type-7
+分子 #4: Proteasome subunit alpha type-5
+分子 #5: Proteasome subunit alpha type-1
+分子 #6: Proteasome subunit alpha type-3
+分子 #7: Proteasome subunit alpha type-6
+分子 #8: Proteasome subunit beta type-7
+分子 #9: Proteasome subunit beta type-3
+分子 #10: Proteasome subunit beta type-2
+分子 #11: Proteasome subunit beta type-5
+分子 #12: Proteasome subunit beta type-1
+分子 #13: Proteasome subunit beta type-4
+分子 #14: Proteasome subunit beta type-6
+分子 #15: Proteasome assembly chaperone 1
+分子 #16: Proteasome assembly chaperone 2
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 緩衝液 | pH: 7.9 |
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| 凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
| 顕微鏡 | FEI TECNAI 12 |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 49.41 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2.4 µm 最小 デフォーカス(公称値): 1.4000000000000001 µm |
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万見について



キーワード
Homo sapiens (ヒト)
データ登録者
中国, 2件
引用











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解析
FIELD EMISSION GUN
