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Open data
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Basic information
Entry | Database: PDB / ID: 7x3u | ||||||
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Title | cryo-EM structure of human TRiC-ADP | ||||||
![]() | (T-complex protein 1 subunit ...) x 8 | ||||||
![]() | STRUCTURAL PROTEIN | ||||||
Function / homology | ![]() zona pellucida receptor complex / positive regulation of protein localization to Cajal body / scaRNA localization to Cajal body / positive regulation of establishment of protein localization to telomere / positive regulation of telomerase RNA localization to Cajal body / tubulin complex assembly / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Folding of actin by CCT/TriC ...zona pellucida receptor complex / positive regulation of protein localization to Cajal body / scaRNA localization to Cajal body / positive regulation of establishment of protein localization to telomere / positive regulation of telomerase RNA localization to Cajal body / tubulin complex assembly / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Folding of actin by CCT/TriC / Formation of tubulin folding intermediates by CCT/TriC / binding of sperm to zona pellucida / Prefoldin mediated transfer of substrate to CCT/TriC / RHOBTB1 GTPase cycle / intermediate filament cytoskeleton / WD40-repeat domain binding / pericentriolar material / beta-tubulin binding / Association of TriC/CCT with target proteins during biosynthesis / heterochromatin / chaperone-mediated protein complex assembly / RHOBTB2 GTPase cycle / : / positive regulation of telomere maintenance via telomerase / protein folding chaperone / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / acrosomal vesicle / cell projection / mRNA 3'-UTR binding / ATP-dependent protein folding chaperone / response to virus / cilium / mRNA 5'-UTR binding / azurophil granule lumen / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / G-protein beta-subunit binding / unfolded protein binding / melanosome / protein folding / cell body / secretory granule lumen / microtubule / ficolin-1-rich granule lumen / cytoskeleton / protein stabilization / cadherin binding / centrosome / ubiquitin protein ligase binding / Neutrophil degranulation / Golgi apparatus / ATP hydrolysis activity / RNA binding / extracellular exosome / extracellular region / nucleoplasm / ATP binding / identical protein binding / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
![]() | Cong, Y. / Liu, C.X. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Pathway and mechanism of tubulin folding mediated by TRiC/CCT along its ATPase cycle revealed using cryo-EM. Authors: Caixuan Liu / Mingliang Jin / Shutian Wang / Wenyu Han / Qiaoyu Zhao / Yifan Wang / Cong Xu / Lei Diao / Yue Yin / Chao Peng / Lan Bao / Yanxing Wang / Yao Cong / ![]() Abstract: The eukaryotic chaperonin TRiC/CCT assists the folding of about 10% of cytosolic proteins through an ATP-driven conformational cycle, and the essential cytoskeleton protein tubulin is the obligate ...The eukaryotic chaperonin TRiC/CCT assists the folding of about 10% of cytosolic proteins through an ATP-driven conformational cycle, and the essential cytoskeleton protein tubulin is the obligate substrate of TRiC. Here, we present an ensemble of cryo-EM structures of endogenous human TRiC throughout its ATPase cycle, with three of them revealing endogenously engaged tubulin in different folding stages. The open-state TRiC-tubulin-S1 and -S2 maps show extra density corresponding to tubulin in the cis-ring chamber of TRiC. Our structural and XL-MS analyses suggest a gradual upward translocation and stabilization of tubulin within the TRiC chamber accompanying TRiC ring closure. In the closed TRiC-tubulin-S3 map, we capture a near-natively folded tubulin-with the tubulin engaging through its N and C domains mainly with the A and I domains of the CCT3/6/8 subunits through electrostatic and hydrophilic interactions. Moreover, we also show the potential role of TRiC C-terminal tails in substrate stabilization and folding. Our study delineates the pathway and molecular mechanism of TRiC-mediated folding of tubulin along the ATPase cycle of TRiC, and may also inform the design of therapeutic agents targeting TRiC-tubulin interactions. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 1.3 MB | Display | ![]() |
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PDB format | ![]() | 1.1 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 2.1 MB | Display | ![]() |
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Full document | ![]() | 2.1 MB | Display | |
Data in XML | ![]() | 187.7 KB | Display | |
Data in CIF | ![]() | 286.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 32993MC ![]() 7wz3C ![]() 7x0aC ![]() 7x0sC ![]() 7x0vC ![]() 7x3jC ![]() 7x6qC ![]() 7x7yC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-T-complex protein 1 subunit ... , 8 types, 16 molecules aAbBDdEegGhHQqZz
#1: Protein | Mass: 60418.477 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #2: Protein | Mass: 57567.141 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Protein | Mass: 57996.113 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #4: Protein | Mass: 59547.684 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #5: Protein | Mass: 60613.855 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #6: Protein | Mass: 59417.457 Da / Num. of mol.: 2 / Mutation: L290S Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #7: Protein | Mass: 59691.422 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #8: Protein | Mass: 58106.086 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Non-polymers , 1 types, 16 molecules 
#9: Chemical | ChemComp-ADP / |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Human TRiC-ADP state / Type: COMPLEX / Entity ID: #1-#8 / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Buffer component | Conc.: 50 mM / Name: sodium Chloride / Formula: NaCl |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm |
Image recording | Electron dose: 38 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 239315 / Symmetry type: POINT |