登録情報 データベース : EMDB / ID : EMD-46461 ダウンロードとリンクタイトル Proteasome core particle assembly intermediate Blm10:13S purified from Saccharomyces cerevisiae マップデータ 詳細 試料複合体 : Proteasome assembly intermediate 詳細 キーワード Proteasome / assembly chaperone / Blm10 / PA200 / Blm10-13S / Pba1 / CP / 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
proteasome core complex import into nucleus / myosin-light-chain kinase / myosin light chain kinase activity / myosin light chain binding / proteasome storage granule assembly / cardiac muscle tissue morphogenesis / ER-Phagosome pathway / Antigen processing: Ub, ATP-independent proteasomal degradation / proteasome core complex assembly / Proteasome assembly ... proteasome core complex import into nucleus / myosin-light-chain kinase / myosin light chain kinase activity / myosin light chain binding / proteasome storage granule assembly / cardiac muscle tissue morphogenesis / ER-Phagosome pathway / Antigen processing: Ub, ATP-independent proteasomal degradation / proteasome core complex assembly / Proteasome assembly / peptidase activator activity / Cross-presentation of soluble exogenous antigens (endosomes) / TNFR2 non-canonical NF-kB pathway / nuclear outer membrane-endoplasmic reticulum membrane network / Regulation of PTEN stability and activity / CDK-mediated phosphorylation and removal of Cdc6 / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / KEAP1-NFE2L2 pathway / Neddylation / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Orc1 removal from chromatin / MAPK6/MAPK4 signaling / proteasome binding / proteasome storage granule / Antigen processing: Ubiquitination & Proteasome degradation / proteasomal ubiquitin-independent protein catabolic process / proteasome endopeptidase complex / Ub-specific processing proteases / proteasome core complex, beta-subunit complex / endopeptidase activator activity / threonine-type endopeptidase activity / proteasome assembly / proteasome core complex, alpha-subunit complex / striated muscle contraction / regulation of proteasomal protein catabolic process / Neutrophil degranulation / proteasome complex / endopeptidase activity / ubiquitin-dependent protein catabolic process / proteasome-mediated ubiquitin-dependent protein catabolic process / calmodulin binding / DNA repair / mRNA binding / DNA damage response / endoplasmic reticulum membrane / signal transduction / mitochondrion / ATP binding / nucleus / cytoplasm / cytosol 類似検索 - 分子機能 Proteasome activator Blm10, N-terminal / Myosin light chain kinase 2, catalytic domain / Proteasome-substrate-size regulator, N-terminal / Proteasome activator complex subunit 4 C-terminal domain / Proteasome activator Blm10, mid region / Proteasome activator complex subunit 4 / : / Proteasome activator complex subunit 4-like, C-terminal / Proteasome activator complex subunit 4, mid HEAT repeats region / Proteasome activator complex subunit 4-like, HEAT repeat-like ... Proteasome activator Blm10, N-terminal / Myosin light chain kinase 2, catalytic domain / Proteasome-substrate-size regulator, N-terminal / Proteasome activator complex subunit 4 C-terminal domain / Proteasome activator Blm10, mid region / Proteasome activator complex subunit 4 / : / Proteasome activator complex subunit 4-like, C-terminal / Proteasome activator complex subunit 4, mid HEAT repeats region / Proteasome activator complex subunit 4-like, HEAT repeat-like / Proteasome maturation factor Ump1 / Proteasome maturation factor UMP1 / Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / 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 / Armadillo-type fold / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily 類似検索 - ドメイン・相同性 Myosin light chain kinase 2, skeletal/cardiac muscle / Probable proteasome subunit alpha type-7 / Proteasome subunit alpha type-1 / Proteasome subunit beta type-4 / Proteasome subunit alpha type-3 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-2 / Proteasome subunit beta type-3 / Proteasome subunit alpha type-5 / Proteasome maturation factor UMP1 ... Myosin light chain kinase 2, skeletal/cardiac muscle / Probable proteasome subunit alpha type-7 / Proteasome subunit alpha type-1 / Proteasome subunit beta type-4 / Proteasome subunit alpha type-3 / Proteasome subunit alpha type-2 / Proteasome subunit beta type-2 / Proteasome subunit beta type-3 / Proteasome subunit alpha type-5 / Proteasome maturation factor UMP1 / Proteasome subunit alpha type-6 / Proteasome subunit alpha type-4 / Proteasome activator BLM10 類似検索 - 構成要素生物種 Saccharomyces cerevisiae (パン酵母)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 2.84 Å 詳細 データ登録者Chen X / Kaur M / Roelofs J / Walters KJ 資金援助 米国, 2件 詳細 詳細を隠すOrganization Grant number 国 National Institutes of Health/National Cancer Institute (NIH/NCI) 1 ZIA BC011490 米国 National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) R35 GM149314 米国
引用ジャーナル : bioRxiv / 年 : 2024タイトル : Structure of Blm10:13S proteasome intermediate reveals parallel assembly pathways for the proteasome core particle.著者 : Mandeep Kaur / Xiang Chen / Stella Y Lee / Tyler M Weaver / Bret D Freudenthal / Kylie J Walters / Jeroen Roelofs / 要旨 : Proteasomes are formed by chaperone-assisted assembly of core particles (CPs) and regulatory particles (RPs). The CP chaperone dimer Pba1/Pba2 binds early to proteasome subunits, and is thought to be ... Proteasomes are formed by chaperone-assisted assembly of core particles (CPs) and regulatory particles (RPs). The CP chaperone dimer Pba1/Pba2 binds early to proteasome subunits, and is thought to be replaced by Blm10 to form Blm10:CP, which promotes ATP-independent degradation of disordered proteins. Here, we present evidence of distinct parallel assembly pathways for CP by solving five cryo-EM structures including a Blm10:13S pre-assembly intermediate. Our data conflict with the current model of Blm10 and Pba1/Pba2 sequential activity in a single assembly pathway, as we find their CP binding is mutually exclusive and both are present on early and late assembly intermediates. CP affinity for Pba1/Pba2 is reduced during maturation, promoting Pba1/Pba2 release. We find Blm10 undergoes no such affinity switch, suggesting this pathway predominantly yields mature Blm10-bound CP. Altogether, our findings conflict with the current paradigm of sequential CP binding to instead indicate parallel assembly pathways by Pba1/Pba2 and Blm10. 履歴 登録 2024年8月7日 - ヘッダ(付随情報) 公開 2024年12月4日 - マップ公開 2024年12月4日 - 更新 2026年3月4日 - 現状 2026年3月4日 処理サイト : RCSB / 状態 : 公開
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