26S Proteasome / Nub1 / Fat10 / MOTOR PROTEIN / HYDROLASE-PROTEIN BINDING complex
機能・相同性
機能・相同性情報
regulation of ubiquitin-dependent protein catabolic process / proteasome accessory complex / proteasome regulatory particle / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, base subcomplex / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis ...regulation of ubiquitin-dependent protein catabolic process / proteasome accessory complex / proteasome regulatory particle / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, base subcomplex / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / regulation of protein catabolic process / proteasome storage granule / response to tumor necrosis factor / response to type II interferon / enzyme regulator activity / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / 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 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of AXIN / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / P-body / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / G2/M Checkpoints / Defective CFTR causes cystic fibrosis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Vif-mediated degradation of APOBEC3G / Regulation of RUNX3 expression and activity / 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 / Regulation of expression of SLITs and ROBOs / FCERI mediated NF-kB activation / cytoplasmic ribonucleoprotein granule / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / osteoblast differentiation / Separation of Sister Chromatids / The role of GTSE1 in G2/M progression after G2 checkpoint / azurophil granule lumen / UCH proteinases / KEAP1-NFE2L2 pathway / Antigen processing: Ubiquitination & Proteasome degradation / Downstream TCR signaling / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / ubiquitin-dependent protein catabolic process / secretory granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / ficolin-1-rich granule lumen / Ub-specific processing proteases / protein ubiquitination / ubiquitin protein ligase binding / Neutrophil degranulation / nucleolus / ATP hydrolysis activity / RNA binding / extracellular exosome / extracellular region / nucleoplasm / ATP binding / nucleus / membrane / cytosol / cytoplasm 類似検索 - 分子機能
ジャーナル: Nat Struct Mol Biol / 年: 2025 タイトル: NUB1 traps unfolded FAT10 for ubiquitin-independent degradation by the 26S proteasome. 著者: Connor Arkinson / Ken C Dong / Christine L Gee / Shawn M Costello / Aimee Chi Soe / Greg L Hura / Susan Marqusee / Andreas Martin / 要旨: The ubiquitin-like modifier FAT10 targets hundreds of proteins in the mammalian immune system to the 26S proteasome for degradation. This degradation pathway requires the cofactor NUB1, yet the ...The ubiquitin-like modifier FAT10 targets hundreds of proteins in the mammalian immune system to the 26S proteasome for degradation. This degradation pathway requires the cofactor NUB1, yet the underlying mechanisms remain unknown. Here, we reconstituted a minimal in vitro system with human components and revealed that NUB1 uses the intrinsic instability of FAT10 to trap its N-terminal ubiquitin-like domain in an unfolded state and deliver it to the 26S proteasome for engagement, allowing the degradation of FAT10-ylated substrates in a ubiquitin-independent and p97-independent manner. Using hydrogen-deuterium exchange, structural modeling and site-directed mutagenesis, we identified the formation of an intricate complex with FAT10 that activates NUB1 for docking to the 26S proteasome, and our cryo-EM studies visualized the highly dynamic NUB1 complex bound to the proteasomal Rpn1 subunit during FAT10 delivery and the early stages of ATP-dependent degradation. These findings identified a previously unknown mode of cofactor-mediated, ubiquitin-independent substrate delivery to the 26S proteasome that relies on trapping partially unfolded states for engagement by the proteasomal ATPase motor.