positive regulation of protein localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Formation of tubulin folding intermediates by CCT/TriC / Folding of actin by CCT/TriC / binding of sperm to zona pellucida / positive regulation by virus of viral protein levels in host cell / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway ...positive regulation of protein localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Formation of tubulin folding intermediates by CCT/TriC / Folding of actin by CCT/TriC / binding of sperm to zona pellucida / positive regulation by virus of viral protein levels in host cell / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / Prefoldin mediated transfer of substrate to CCT/TriC / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / UV-damage excision repair / biological process involved in interaction with symbiont / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / negative regulation of reproductive process / negative regulation of developmental process / Association of TriC/CCT with target proteins during biosynthesis / cullin family protein binding / viral release from host cell / ectopic germ cell programmed cell death / beta-tubulin binding / ubiquitin-like ligase-substrate adaptor activity / positive regulation of viral genome replication / 加水分解酵素; 酸無水物に作用; リン含有酸無水物に作用 / proteasomal protein catabolic process / : / positive regulation of telomere maintenance via telomerase / positive regulation of gluconeogenesis / protein folding chaperone / T cell activation / Recognition of DNA damage by PCNA-containing replication complex / mRNA 3'-UTR binding / DNA Damage Recognition in GG-NER / nucleotide-excision repair / ATP-dependent protein folding chaperone / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / Formation of Incision Complex in GG-NER / regulation of circadian rhythm / Dual incision in TC-NER / mRNA 5'-UTR binding / Gap-filling DNA repair synthesis and ligation in TC-NER / response to virus / Wnt signaling pathway / positive regulation of protein catabolic process / cellular response to UV / rhythmic process / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / unfolded protein binding / site of double-strand break / protein folding / G-protein beta-subunit binding / Neddylation / cell body / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / damaged DNA binding / proteasome-mediated ubiquitin-dependent protein catabolic process / microtubule / chromosome, telomeric region / protein ubiquitination / regulation of autophagy / protein stabilization / DNA repair / apoptotic process / centrosome / DNA damage response / negative regulation of apoptotic process / protein-containing complex binding / nucleolus / protein-containing complex / ATP hydrolysis activity / extracellular space / DNA binding / extracellular exosome / nucleoplasm / ATP binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能
ジャーナル: EMBO J / 年: 2023 タイトル: Recognition of the CCT5 di-Glu degron by CRL4 is dependent on TRiC assembly. 著者: Carlos Pla-Prats / Simone Cavadini / Georg Kempf / Nicolas H Thomä / 要旨: Assembly Quality Control (AQC) E3 ubiquitin ligases target incomplete or incorrectly assembled protein complexes for degradation. The CUL4-RBX1-DDB1-DCAF12 (CRL4 ) E3 ligase preferentially ...Assembly Quality Control (AQC) E3 ubiquitin ligases target incomplete or incorrectly assembled protein complexes for degradation. The CUL4-RBX1-DDB1-DCAF12 (CRL4 ) E3 ligase preferentially ubiquitinates proteins that carry a C-terminal double glutamate (di-Glu) motif. Reported CRL4 di-Glu-containing substrates include CCT5, a subunit of the TRiC chaperonin. How DCAF12 engages its substrates and the functional relationship between CRL4 and CCT5/TRiC is currently unknown. Here, we present the cryo-EM structure of the DDB1-DCAF12-CCT5 complex at 2.8 Å resolution. DCAF12 serves as a canonical WD40 DCAF substrate receptor and uses a positively charged pocket at the center of the β-propeller to bind the C-terminus of CCT5. DCAF12 specifically reads out the CCT5 di-Glu side chains, and contacts other visible degron amino acids through Van der Waals interactions. The CCT5 C-terminus is inaccessible in an assembled TRiC complex, and functional assays demonstrate that DCAF12 binds and ubiquitinates monomeric CCT5, but not CCT5 assembled into TRiC. Our biochemical and structural results suggest a previously unknown role for the CRL4 E3 ligase in overseeing the assembly of a key cellular complex.