+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-4489 | |||||||||
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Title | Human CCT:mLST8 complex | |||||||||
Map data | CCT:mLST8 complex | |||||||||
Sample |
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Keywords | CCT / folding / WD40 / mLST8 / CHAPERONE | |||||||||
Function / homology | Function and homology information zona pellucida receptor complex / scaRNA localization to Cajal body / chaperone mediated protein folding independent of cofactor / positive regulation of establishment of protein localization to telomere / positive regulation of protein localization to Cajal body / tubulin complex assembly / BBSome-mediated cargo-targeting to cilium / chaperonin-containing T-complex / binding of sperm to zona pellucida / positive regulation of telomerase RNA localization to Cajal body ...zona pellucida receptor complex / scaRNA localization to Cajal body / chaperone mediated protein folding independent of cofactor / positive regulation of establishment of protein localization to telomere / positive regulation of protein localization to Cajal body / tubulin complex assembly / BBSome-mediated cargo-targeting to cilium / chaperonin-containing T-complex / binding of sperm to zona pellucida / positive regulation of telomerase RNA localization to Cajal body / Folding of actin by CCT/TriC / Formation of tubulin folding intermediates by CCT/TriC / 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 / chaperone-mediated protein complex assembly / RHOBTB2 GTPase cycle / heterochromatin / chaperone-mediated protein folding / protein folding chaperone / positive regulation of telomere maintenance via telomerase / 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 / Cooperation of PDCL (PhLP1) and TRiC/CCT in G-protein beta folding / azurophil granule lumen / G-protein beta-subunit binding / unfolded protein binding / melanosome / protein folding / cell body / secretory granule lumen / ficolin-1-rich granule lumen / microtubule / 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 / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.97 Å | |||||||||
Authors | Cuellar J / Santiago C / Ludlam WG / Bueno-Carrasco MT / Valpuesta JM / Willardson BM | |||||||||
Funding support | United States, Spain, 2 items
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Citation | Journal: Nat Commun / Year: 2019 Title: 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. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_4489.map.gz | 3.3 MB | EMDB map data format | |
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Header (meta data) | emd-4489-v30.xml emd-4489.xml | 30.5 KB 30.5 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_4489_fsc.xml | 7.1 KB | Display | FSC data file |
Images | emd_4489.png | 335.1 KB | ||
Filedesc metadata | emd-4489.cif.gz | 9.5 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-4489 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-4489 | HTTPS FTP |
-Validation report
Summary document | emd_4489_validation.pdf.gz | 475.9 KB | Display | EMDB validaton report |
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Full document | emd_4489_full_validation.pdf.gz | 475.5 KB | Display | |
Data in XML | emd_4489_validation.xml.gz | 9.7 KB | Display | |
Data in CIF | emd_4489_validation.cif.gz | 12.6 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4489 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-4489 | HTTPS FTP |
-Related structure data
Related structure data | 6qb8MC 4503C M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_4489.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | CCT:mLST8 complex | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.37 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : CCT:mLST8 complex
+Supramolecule #1: CCT:mLST8 complex
+Macromolecule #1: T-complex protein 1 subunit alpha
+Macromolecule #2: T-complex protein 1 subunit beta
+Macromolecule #3: T-complex protein 1 subunit delta
+Macromolecule #4: T-complex protein 1 subunit epsilon
+Macromolecule #5: T-complex protein 1 subunit gamma
+Macromolecule #6: T-complex protein 1 subunit eta
+Macromolecule #7: T-complex protein 1 subunit theta
+Macromolecule #8: T-complex protein 1 subunit zeta
+Macromolecule #9: ADENOSINE-5'-DIPHOSPHATE
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 0.5 mg/mL |
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Buffer | pH: 7.5 |
Grid | Model: Quantifoil R2/2 / Material: COPPER/RHODIUM / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec. |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Quantum LS |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 2 / Number real images: 5576 / Average exposure time: 7.0 sec. / Average electron dose: 36.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 105000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
+Image processing
-Atomic model buiding 1
Initial model |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT | ||||||||||||||||||||||||||||||||||
Output model | PDB-6qb8: |