- EMDB-28754: Client-bound structure of a DegP trimer within a 12mer cage -
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基本情報
登録情報
データベース: EMDB / ID: EMD-28754
タイトル
Client-bound structure of a DegP trimer within a 12mer cage
マップデータ
Local refinement cryo-EM map of a DegP trimer bound to the client hTRF1. The trimer is within a 12mer cage structure.
試料
複合体: Complex of a DegP trimer and the client protein hTRF1 from a 12mer cage structure
タンパク質・ペプチド: Periplasmic serine endoprotease DegP
タンパク質・ペプチド: Periplasmic serine endoprotease DegP
タンパク質・ペプチド: Telomeric repeat-binding factor 1
キーワード
Protease / chaperone / hydrolase / cage / complex
機能・相同性
機能・相同性情報
positive regulation of shelterin complex assembly / negative regulation of establishment of protein localization to telomere / negative regulation of establishment of RNA localization to telomere / negative regulation of establishment of protein-containing complex localization to telomere / negative regulation of telomere maintenance via semi-conservative replication / negative regulation of exonuclease activity / negative regulation of telomeric D-loop disassembly / meiotic telomere clustering / peptidase Do / telomerase activity ...positive regulation of shelterin complex assembly / negative regulation of establishment of protein localization to telomere / negative regulation of establishment of RNA localization to telomere / negative regulation of establishment of protein-containing complex localization to telomere / negative regulation of telomere maintenance via semi-conservative replication / negative regulation of exonuclease activity / negative regulation of telomeric D-loop disassembly / meiotic telomere clustering / peptidase Do / telomerase activity / t-circle formation / telomeric D-loop disassembly / shelterin complex / Telomere C-strand synthesis initiation / double-stranded telomeric DNA binding / Telomere C-strand (Lagging Strand) Synthesis / negative regulation of telomerase activity / positive regulation of telomere maintenance / nuclear telomere cap complex / ankyrin repeat binding / Processive synthesis on the C-strand of the telomere / Polymerase switching on the C-strand of the telomere / programmed cell death / Removal of the Flap Intermediate from the C-strand / G-rich strand telomeric DNA binding / telomere capping / DNA binding, bending / negative regulation of telomere maintenance via telomere lengthening / response to temperature stimulus / telomeric DNA binding / negative regulation of DNA replication / protein quality control for misfolded or incompletely synthesized proteins / negative regulation of telomere maintenance via telomerase / Telomere Extension By Telomerase / telomere maintenance via telomerase / Packaging Of Telomere Ends / chaperone-mediated protein folding / Recognition and association of DNA glycosylase with site containing an affected purine / Cleavage of the damaged purine / Recognition and association of DNA glycosylase with site containing an affected pyrimidine / Cleavage of the damaged pyrimidine / Inhibition of DNA recombination at telomere / Meiotic synapsis / serine-type peptidase activity / telomere maintenance / DNA Damage/Telomere Stress Induced Senescence / fibrillar center / spindle / protein folding / peptidase activity / response to heat / outer membrane-bounded periplasmic space / microtubule binding / response to oxidative stress / chromosome, telomeric region / periplasmic space / nuclear body / positive regulation of apoptotic process / cell division / serine-type endopeptidase activity / nucleolus / protein homodimerization activity / proteolysis / DNA binding / nucleoplasm / identical protein binding / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能
ジャーナル: J Am Chem Soc / 年: 2023 タイトル: Flexible Client-Dependent Cages in the Assembly Landscape of the Periplasmic Protease-Chaperone DegP. 著者: Robert W Harkness / Zev A Ripstein / Justin M Di Trani / Lewis E Kay / 要旨: The periplasmic protein DegP, which is implicated in virulence factor transport leading to pathogenicity, is a bi-functional protease and chaperone that helps to maintain protein homeostasis in Gram- ...The periplasmic protein DegP, which is implicated in virulence factor transport leading to pathogenicity, is a bi-functional protease and chaperone that helps to maintain protein homeostasis in Gram-negative bacteria and is essential to bacterial survival under stress conditions. To perform these functions, DegP captures clients inside cage-like structures, which we have recently shown to form through the reorganization of high-order preformed apo oligomers, consisting of trimeric building blocks, that are structurally distinct from client-bound cages. Our previous studies suggested that these apo oligomers may allow DegP to encapsulate clients of various sizes under protein folding stresses by forming ensembles that can include extremely large cage particles, but how this occurs remains an open question. To explore the relation between cage and substrate sizes, we engineered a series of DegP clients of increasing hydrodynamic radii and analyzed their influence on DegP cage formation. We used dynamic light scattering and cryogenic electron microscopy to characterize the hydrodynamic properties and structures of the DegP cages that are adopted in response to each client. We present a series of density maps and structural models that include those for novel particles of approximately 30 and 60 monomers. Key interactions between DegP trimers and the bound clients that stabilize the cage assemblies and prime the clients for catalysis are revealed. We also provide evidence that DegP can form cages which approach subcellular organelles in terms of size.