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基本情報
登録情報 | データベース: PDB / ID: 8fz6 | |||||||||
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タイトル | The human PI31 complexed with bovine 20S proteasome | |||||||||
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![]() | HYDROLASE / PI31 / inhibitor / 20S / proteasome | |||||||||
機能・相同性 | ![]() Cross-presentation of soluble exogenous antigens (endosomes) / Regulation of ornithine decarboxylase (ODC) / Activation of NF-kappaB in B cells / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / Autodegradation of the E3 ubiquitin ligase COP1 ...Cross-presentation of soluble exogenous antigens (endosomes) / Regulation of ornithine decarboxylase (ODC) / Activation of NF-kappaB in B cells / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / Autodegradation of the E3 ubiquitin ligase COP1 / Asymmetric localization of PCP proteins / Degradation of AXIN / Degradation of DVL / Hedgehog ligand biogenesis / Dectin-1 mediated noncanonical NF-kB signaling / CLEC7A (Dectin-1) signaling / Degradation of GLI1 by the proteasome / Hedgehog 'on' state / TNFR2 non-canonical NF-kB pathway / NIK-->noncanonical NF-kB signaling / Assembly of the pre-replicative complex / Orc1 removal from chromatin / CDK-mediated phosphorylation and removal of Cdc6 / G2/M Checkpoints / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Ubiquitin-dependent degradation of Cyclin D / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Regulation of RUNX2 expression and activity / Regulation of RUNX3 expression and activity / Regulation of PTEN stability and activity / Interleukin-1 signaling / KEAP1-NFE2L2 pathway / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Degradation of beta-catenin by the destruction complex / Neddylation / Antigen processing: Ubiquitination & Proteasome degradation / UCH proteinases / ABC-family proteins mediated transport / negative regulation of proteasomal protein catabolic process / Ub-specific processing proteases / Downstream TCR signaling / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / AUF1 (hnRNP D0) binds and destabilizes mRNA / GLI3 is processed to GLI3R by the proteasome / MAPK6/MAPK4 signaling / proteasome core complex / Neutrophil degranulation / endopeptidase inhibitor activity / immune system process / proteasome binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome core complex, alpha-subunit complex / threonine-type endopeptidase activity / negative regulation of inflammatory response to antigenic stimulus / proteasome complex / ciliary basal body / proteolysis involved in protein catabolic process / lipopolysaccharide binding / P-body / ubiquitin-dependent protein catabolic process / proteasome-mediated ubiquitin-dependent protein catabolic process / endopeptidase activity / response to oxidative stress / postsynapse / protein heterodimerization activity / centrosome / synapse / perinuclear region of cytoplasm / endoplasmic reticulum / protein homodimerization activity / mitochondrion / nucleoplasm / identical protein binding / nucleus / cytosol / cytoplasm 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: 2.54 Å | |||||||||
![]() | Hsu, H.-C. / Li, H. | |||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Ηigh-resolution structure of mammalian PI31-20S proteasome complex reveals mechanism of proteasome inhibition. 著者: Hao-Chi Hsu / Jason Wang / Abbey Kjellgren / Huilin Li / George N DeMartino / ![]() 要旨: Proteasome-catalyzed protein degradation mediates and regulates critical aspects of many cellular functions and is an important element of proteostasis in health and disease. Proteasome function is ...Proteasome-catalyzed protein degradation mediates and regulates critical aspects of many cellular functions and is an important element of proteostasis in health and disease. Proteasome function is determined in part by the types of proteasome holoenzymes formed between the 20S core particle that catalyzes peptide bond hydrolysis and any of multiple regulatory proteins to which it binds. One of these regulators, PI31, was previously identified as an in vitro 20S proteasome inhibitor, but neither the molecular mechanism nor the possible physiologic significance of PI31-mediated proteasome inhibition has been clear. Here we report a high-resolution cryo-EM structure of the mammalian 20S proteasome in complex with PI31. The structure shows that two copies of the intrinsically disordered carboxyl terminus of PI31 are present in the central cavity of the closed-gate conformation of the proteasome and interact with proteasome catalytic sites in a manner that blocks proteolysis of substrates but resists their own degradation. The two inhibitory polypeptide chains appear to originate from PI31 monomers that enter the catalytic chamber from opposite ends of the 20S cylinder. We present evidence that PI31 can inhibit proteasome activity in mammalian cells and may serve regulatory functions for the control of cellular proteostasis. | |||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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ダウンロード
PDBx/mmCIF形式 | ![]() | 1.5 MB | 表示 | ![]() |
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PDB形式 | ![]() | 992.4 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 |
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-関連構造データ
関連構造データ | ![]() 29604MC ![]() 8fz5C C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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集合体
登録構造単位 | ![]()
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要素
-Proteasome subunit alpha type- ... , 7種, 14分子 AOBPCQDRESFTGU
#1: タンパク質 | 分子量: 27432.459 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #2: タンパク質 | 分子量: 25927.535 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #3: タンパク質 | 分子量: 29525.842 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #4: タンパク質 | 分子量: 27911.912 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #5: タンパク質 | 分子量: 26435.977 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #6: タンパク質 | 分子量: 29625.654 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #7: タンパク質 | 分子量: 28441.197 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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-Proteasome subunit beta type- ... , 7種, 14分子 HVIWJXKYLZMaNb
#8: タンパク質 | 分子量: 25562.982 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #9: タンパク質 | 分子量: 30045.391 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #10: タンパク質 | 分子量: 23016.947 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #11: タンパク質 | 分子量: 22924.309 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #12: タンパク質 | 分子量: 28642.330 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #13: タンパク質 | 分子量: 26278.059 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() #14: タンパク質 | 分子量: 29057.018 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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-タンパク質 , 1種, 2分子 cd
#15: タンパク質 | 分子量: 29850.674 Da / 分子数: 2 / 由来タイプ: 天然 / 由来: (天然) ![]() ![]() |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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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 |
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試料調製
構成要素 | 名称: 20S proteasome complexed with PI31 / タイプ: COMPLEX / 詳細: bovine 20S proteasome complexed with human PI31 / Entity ID: all / 由来: NATURAL |
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分子量 | 値: 0.7 MDa / 実験値: YES |
由来(天然) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.5 / 詳細: 20 mM Tris, pH 7.5, 5 mM MgCl2, 100 mM KCl, 1mM DTT |
試料 | 濃度: 3 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: 300 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: 278 K |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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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 / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 1800 nm / 最小 デフォーカス(公称値): 1300 nm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 1.3 sec. / 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 実像数: 19264 |
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解析
ソフトウェア |
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EMソフトウェア |
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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: 1573299 | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 2.54 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 350283 / アルゴリズム: FOURIER SPACE / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 89.4 / プロトコル: AB INITIO MODEL / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 1IRU Accession code: 1IRU / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||||||
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: 41.91 Å2 | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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