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Open data
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Basic information
| Entry | Database: PDB / ID: 6qb8 | ||||||||||||
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| Title | Human CCT:mLST8 complex | ||||||||||||
Components | (T-complex protein 1 subunit ...) x 8 | ||||||||||||
Keywords | CHAPERONE / CCT / folding / WD40 / mLST8 | ||||||||||||
| Function / homology | Function and homology informationzona pellucida receptor complex / positive regulation of establishment of protein localization to telomere / positive regulation of protein localization to Cajal body / scaRNA localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / tubulin complex assembly / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Formation of tubulin folding intermediates by CCT/TriC ...zona pellucida receptor complex / positive regulation of establishment of protein localization to telomere / positive regulation of protein localization to Cajal body / scaRNA localization to Cajal body / positive regulation of telomerase RNA localization to Cajal body / tubulin complex assembly / chaperonin-containing T-complex / : / BBSome-mediated cargo-targeting to cilium / Formation of tubulin folding intermediates by CCT/TriC / binding of sperm to zona pellucida / Folding of actin by CCT/TriC / Prefoldin mediated transfer of substrate to CCT/TriC / RHOBTB1 GTPase cycle / WD40-repeat domain binding / pericentriolar material / Association of TriC/CCT with target proteins during biosynthesis / chaperone-mediated protein complex assembly / beta-tubulin binding / Hydrolases; Acting on acid anhydrides; In phosphorus-containing anhydrides / RHOBTB2 GTPase cycle / heterochromatin / : / positive regulation of telomere maintenance via telomerase / protein folding chaperone / acrosomal vesicle / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / mRNA 3'-UTR binding / cell projection / ATP-dependent protein folding chaperone / mRNA 5'-UTR binding / response to virus / azurophil granule lumen / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / unfolded protein binding / melanosome / G-protein beta-subunit binding / protein folding / cell body / secretory granule lumen / ficolin-1-rich granule lumen / microtubule / cytoskeleton / protein stabilization / cilium / cadherin binding / ubiquitin protein ligase binding / centrosome / 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 | Homo sapiens (human) | ||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.97 Å | ||||||||||||
Authors | Cuellar, J. / Santiago, C. / Ludlam, W.G. / Bueno-Carrasco, M.T. / Valpuesta, J.M. / Willardson, B.M. | ||||||||||||
| Funding support | United States, Spain, 3items
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Citation | Journal: Nat Commun / Year: 2019Title: Structural and functional analysis of the role of the chaperonin CCT in mTOR complex assembly. Authors: Jorge Cuéllar / W Grant Ludlam / Nicole C Tensmeyer / Takuma Aoba / Madhura Dhavale / César Santiago / M Teresa Bueno-Carrasco / Michael J Mann / Rebecca L Plimpton / Aman Makaju / Sarah ...Authors: Jorge Cuéllar / W Grant Ludlam / Nicole C Tensmeyer / Takuma Aoba / Madhura Dhavale / César Santiago / M Teresa Bueno-Carrasco / Michael J Mann / Rebecca L Plimpton / Aman Makaju / Sarah Franklin / Barry M Willardson / José M Valpuesta / ![]() Abstract: The mechanistic target of rapamycin (mTOR) kinase forms two multi-protein signaling complexes, mTORC1 and mTORC2, which are master regulators of cell growth, metabolism, survival and autophagy. Two ...The mechanistic target of rapamycin (mTOR) kinase forms two multi-protein signaling complexes, mTORC1 and mTORC2, which are master regulators of cell growth, metabolism, survival and autophagy. Two of the subunits of these complexes are mLST8 and Raptor, β-propeller proteins that stabilize the mTOR kinase and recruit substrates, respectively. Here we report that the eukaryotic chaperonin CCT plays a key role in mTORC assembly and signaling by folding both mLST8 and Raptor. A high resolution (4.0 Å) cryo-EM structure of the human mLST8-CCT intermediate isolated directly from cells shows mLST8 in a near-native state bound to CCT deep within the folding chamber between the two CCT rings, and interacting mainly with the disordered N- and C-termini of specific CCT subunits of both rings. These findings describe a unique function of CCT in mTORC assembly and a distinct binding site in CCT for mLST8, far from those found for similar β-propeller proteins. | ||||||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 6qb8.cif.gz | 1.3 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6qb8.ent.gz | 1.1 MB | Display | PDB format |
| PDBx/mmJSON format | 6qb8.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 6qb8_validation.pdf.gz | 1 MB | Display | wwPDB validaton report |
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| Full document | 6qb8_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | 6qb8_validation.xml.gz | 172.4 KB | Display | |
| Data in CIF | 6qb8_validation.cif.gz | 276.3 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qb/6qb8 ftp://data.pdbj.org/pub/pdb/validation_reports/qb/6qb8 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 4489MC ![]() 4503C M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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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.) Homo sapiens (human) / Gene: TCP1, CCT1, CCTA / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P17987#2: Protein | Mass: 57567.141 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT2, 99D8.1, CCTB / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P78371#3: Protein | Mass: 57996.113 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT4, CCTD, SRB / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P50991#4: Protein | Mass: 59749.957 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT5, CCTE, KIAA0098 / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P48643#5: Protein | Mass: 60482.652 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT3, CCTG, TRIC5 / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P49368#6: Protein | Mass: 59443.535 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT7, CCTH, NIP7-1 / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: Q99832#7: Protein | Mass: 59691.422 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT8, C21orf112, CCTQ, KIAA0002 / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P50990#8: Protein | Mass: 58106.086 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CCT6A, CCT6, CCTZ / Cell line (production host): HEK293T / Production host: Homo sapiens (human) / References: UniProt: P40227 |
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-Non-polymers , 1 types, 2 molecules 
| #9: Chemical |
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-Details
| Has protein modification | 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: CCT:mLST8 complex / Type: COMPLEX Details: we have characterized the complex between the eukaryotic chaperonin CCT (1 MDa; formed by two copies of eight homologous subunits) and its substrate mLST8 (mammalian Lethal with SEC13 ...Details: we have characterized the complex between the eukaryotic chaperonin CCT (1 MDa; formed by two copies of eight homologous subunits) and its substrate mLST8 (mammalian Lethal with SEC13 protein 8, also called Gbeta-like protein) Entity ID: #1-#8 / Source: RECOMBINANT |
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| Molecular weight | Value: 1 MDa / Experimental value: YES |
| Source (natural) | Organism: Homo sapiens (human) |
| Source (recombinant) | Organism: Homo sapiens (human) / Cell: HEK293T |
| Buffer solution | pH: 7.5 |
| Specimen | Conc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: COPPER/RHODIUM / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 |
| 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Cs: 2.7 mm / Alignment procedure: COMA FREE |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 7 sec. / Electron dose: 36 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 2 / Num. of real images: 5576 |
| EM imaging optics | Energyfilter name: GIF Quantum LS |
| Image scans | Movie frames/image: 40 |
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Processing
| Software | Name: PHENIX / Version: 1.14_3260: / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||
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| EM software |
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 1769600 | |||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.97 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 452000 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL | |||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | 3D fitting-ID: 1 / Accession code: 5GW5 / Initial refinement model-ID: 1 / PDB-ID: 5GW5 / Source name: PDB / Type: experimental model
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About Yorodumi




Homo sapiens (human)
United States,
Spain, 3items
Citation
UCSF Chimera









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