登録情報 データベース : EMDB / ID : EMD-30824 構造の表示 ダウンロードとリンクタイトル PA28alpha-beta in complex with immunoproteasome マップデータPA28-iCP 詳細 試料複合体 : 20S proteasome purified from bovine spleen in complex of human PA28 詳細 キーワード proteasome / PA28 alpha / PA28 beta / immunoproteasome / HYDROLASE機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
Antigen processing: Ub, ATP-independent proteasomal degradation / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / ER-Phagosome pathway / proteasome activator complex / spermatoproteasome complex / 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 ... Antigen processing: Ub, ATP-independent proteasomal degradation / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / ER-Phagosome pathway / proteasome activator complex / spermatoproteasome complex / 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 / Autodegradation of the E3 ubiquitin ligase COP1 / Asymmetric localization of PCP proteins / Degradation of AXIN / Degradation of DVL / Hedgehog ligand biogenesis / Hedgehog 'on' state / TNFR2 non-canonical NF-kB pathway / Assembly of the pre-replicative complex / CDK-mediated phosphorylation and removal of Cdc6 / G2/M Checkpoints / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Ubiquitin-dependent degradation of Cyclin D / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Regulation of RUNX3 expression and activity / Regulation of PTEN stability and activity / KEAP1-NFE2L2 pathway / Degradation of CDH1 / Degradation of CRY and PER proteins / Activation of NF-kappaB in B cells / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / Dectin-1 mediated noncanonical NF-kB signaling / CLEC7A (Dectin-1) signaling / Degradation of GLI1 by the proteasome / NIK-->noncanonical NF-kB signaling / Orc1 removal from chromatin / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Regulation of RUNX2 expression and activity / Interleukin-1 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Degradation of beta-catenin by the destruction complex / Neddylation / Antigen processing: Ubiquitination & Proteasome degradation / UCH proteinases / antigen processing and presentation of exogenous antigen / Downstream TCR signaling / AUF1 (hnRNP D0) binds and destabilizes mRNA / Ub-specific processing proteases / The role of GTSE1 in G2/M progression after G2 checkpoint / ABC-family protein mediated transport / Separation of Sister Chromatids / MAPK6/MAPK4 signaling / GLI3 is processed to GLI3R by the proteasome / Antigen processing: Ub, ATP-independent proteasomal degradation / Neutrophil degranulation / Proteasome assembly / proteasome core complex / Cross-presentation of soluble exogenous antigens (endosomes) / regulation of G1/S transition of mitotic cell cycle / T cell proliferation / immune system process / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / endopeptidase activator activity / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / fat cell differentiation / regulation of proteasomal protein catabolic process / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / : / proteasome complex / P-body / cell morphogenesis / ER-Phagosome pathway / endopeptidase activity / proteasome-mediated ubiquitin-dependent protein catabolic process / ciliary basal body / mitochondrion / extracellular exosome / nucleoplasm / membrane / identical protein binding / nucleus / cytoplasm / cytosol 類似検索 - 分子機能 Proteasome activator PA28, N-terminal domain / Proteasome activator PA28, N-terminal domain superfamily / Proteasome activator PA28, N-terminal / Proteasome activator PA28 / Proteasome activator PA28, C-terminal domain / Proteasome activator superfamily / Proteasome activator PA28, C-terminal domain superfamily / Proteasome activator PA28, C-terminal / Proteasome subunit alpha 1 / Proteasome beta subunit, C-terminal ... Proteasome activator PA28, N-terminal domain / Proteasome activator PA28, N-terminal domain superfamily / Proteasome activator PA28, N-terminal / Proteasome activator PA28 / Proteasome activator PA28, C-terminal domain / Proteasome activator superfamily / Proteasome activator PA28, C-terminal domain superfamily / Proteasome activator PA28, C-terminal / Proteasome subunit alpha 1 / Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit beta 4 / Proteasome subunit beta 2 / Proteasome beta 3 subunit / Proteasome subunit alpha5 / Proteasome subunit alpha6 / Proteasome beta-type subunits signature. / Peptidase T1A, proteasome beta-subunit / Proteasome beta-type subunit, conserved site / Proteasome subunit A N-terminal signature / Proteasome alpha-type subunits signature. / Proteasome alpha-subunit, N-terminal domain / Proteasome subunit A N-terminal signature Add an annotation / Proteasome B-type subunit / Proteasome beta-type subunit profile. / : / Proteasome alpha-type subunit / Proteasome alpha-type subunit profile. / Proteasome subunit / Proteasome, subunit alpha/beta / Nucleophile aminohydrolases, N-terminal 類似検索 - ドメイン・相同性 Proteasome subunit beta type-3 / Proteasome activator complex subunit 1 / Proteasome subunit beta type-1 / Proteasome subunit alpha type-6 / Proteasome subunit beta type-9 / Proteasome subunit beta type-10 / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-4 / Proteasome subunit beta type-8 ... Proteasome subunit beta type-3 / Proteasome activator complex subunit 1 / Proteasome subunit beta type-1 / Proteasome subunit alpha type-6 / Proteasome subunit beta type-9 / Proteasome subunit beta type-10 / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-4 / Proteasome subunit beta type-8 / Proteasome subunit alpha type-7 / Proteasome subunit alpha type-4 / Proteasome subunit alpha type-3 / Proteasome subunit alpha type-5 / Proteasome subunit beta type-2 / Proteasome activator complex subunit 2 類似検索 - 構成要素生物種 Bos taurus (ウシ) / 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 : 4.1 Å 詳細 データ登録者Cong Y / Xu C 資金援助 中国, 1件 詳細 詳細を隠すOrganization Grant number 国 Chinese Academy of Sciences 中国
引用ジャーナル : Nat Commun / 年 : 2021タイトル : Cryo-EM of mammalian PA28αβ-iCP immunoproteasome reveals a distinct mechanism of proteasome activation by PA28αβ.著者 : Jinhuan Chen / Yifan Wang / Cong Xu / Kaijian Chen / Qiaoyu Zhao / Shutian Wang / Yue Yin / Chao Peng / Zhanyu Ding / Yao Cong / 要旨 : The proteasome activator PA28αβ affects MHC class I antigen presentation by associating with immunoproteasome core particles (iCPs). However, due to the lack of a mammalian PA28αβ-iCP structure, ... The proteasome activator PA28αβ affects MHC class I antigen presentation by associating with immunoproteasome core particles (iCPs). However, due to the lack of a mammalian PA28αβ-iCP structure, how PA28αβ regulates proteasome remains elusive. Here we present the complete architectures of the mammalian PA28αβ-iCP immunoproteasome and free iCP at near atomic-resolution by cryo-EM, and determine the spatial arrangement between PA28αβ and iCP through XL-MS. Our structures reveal a slight leaning of PA28αβ towards the α3-α4 side of iCP, disturbing the allosteric network of the gatekeeper α2/3/4 subunits, resulting in a partial open iCP gate. We find that the binding and activation mechanism of iCP by PA28αβ is distinct from those of constitutive CP by the homoheptameric TbPA26 or PfPA28. Our study sheds lights on the mechanism of enzymatic activity stimulation of immunoproteasome and suggests that PA28αβ-iCP has experienced profound remodeling during evolution to achieve its current level of function in immune response. 履歴 登録 2020年12月26日 - ヘッダ(付随情報) 公開 2021年1月20日 - マップ公開 2021年1月20日 - 更新 2025年6月25日 - 現状 2025年6月25日 処理サイト : PDBj / 状態 : 公開
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