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Open data
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Basic information
| Entry | Database: PDB / ID: 6bcx | ||||||
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| Title | mTORC1 structure refined to 3.0 angstroms | ||||||
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Keywords | TRANSFERASE / PIKK | ||||||
| Function / homology | Function and homology informationActivation of the mRNA upon binding of the cap-binding complex and eIFs, and subsequent binding to 43S / eukaryotic initiation factor 4E binding / cardiac cell development / positive regulation of SCF-dependent proteasomal ubiquitin-dependent catabolic process / RNA polymerase III type 2 promoter sequence-specific DNA binding / T-helper 1 cell lineage commitment / RNA polymerase III type 1 promoter sequence-specific DNA binding / positive regulation of cytoplasmic translational initiation / regulation of locomotor rhythm / positive regulation of pentose-phosphate shunt ...Activation of the mRNA upon binding of the cap-binding complex and eIFs, and subsequent binding to 43S / eukaryotic initiation factor 4E binding / cardiac cell development / positive regulation of SCF-dependent proteasomal ubiquitin-dependent catabolic process / RNA polymerase III type 2 promoter sequence-specific DNA binding / T-helper 1 cell lineage commitment / RNA polymerase III type 1 promoter sequence-specific DNA binding / positive regulation of cytoplasmic translational initiation / regulation of locomotor rhythm / positive regulation of pentose-phosphate shunt / positive regulation of wound healing, spreading of epidermal cells / TORC2 complex / cellular response to leucine starvation / TFIIIC-class transcription factor complex binding / positive regulation of odontoblast differentiation / regulation of lysosome organization / TORC1 complex / negative regulation of lysosome organization / regulation of osteoclast differentiation / RNA polymerase III type 3 promoter sequence-specific DNA binding / positive regulation of transcription of nucleolar large rRNA by RNA polymerase I / positive regulation of keratinocyte migration / MTOR signalling / cellular response to L-leucine / Energy dependent regulation of mTOR by LKB1-AMPK / cellular response to nutrient / regulation of autophagosome assembly / Amino acids regulate mTORC1 / Dengue virus modulates apoptosis / cellular response to methionine / positive regulation of osteoclast differentiation / TORC2 signaling / cellular response to osmotic stress / anoikis / inositol hexakisphosphate binding / negative regulation of protein localization to nucleus / positive regulation of ubiquitin-dependent protein catabolic process / negative regulation of macroautophagy / regulation of cell size / Macroautophagy / Constitutive Signaling by AKT1 E17K in Cancer / positive regulation of transcription by RNA polymerase III / TORC1 signaling / positive regulation of protein kinase activity / behavioral response to pain / social behavior / response to amino acid / TOR signaling / mTORC1-mediated signalling / CD28 dependent PI3K/Akt signaling / HSF1-dependent transactivation / positive regulation of TOR signaling / positive regulation of translational initiation / positive regulation of lipid biosynthetic process / enzyme-substrate adaptor activity / protein kinase activator activity / protein serine/threonine kinase inhibitor activity / positive regulation of epithelial to mesenchymal transition / T cell costimulation / positive regulation of G1/S transition of mitotic cell cycle / neuronal action potential / vascular endothelial cell response to laminar fluid shear stress / regulation of cellular response to heat / positive regulation of mitotic cell cycle / regulation of macroautophagy / 'de novo' pyrimidine nucleobase biosynthetic process / cytoskeleton organization / phagocytic vesicle / positive regulation of endothelial cell proliferation / negative regulation of insulin receptor signaling pathway / 14-3-3 protein binding / translation repressor activity / endomembrane system / negative regulation of translational initiation / cellular response to nutrient levels / translation initiation factor binding / positive regulation of glycolytic process / negative regulation of autophagy / regulation of signal transduction by p53 class mediator / cellular response to amino acid starvation / cellular response to starvation / Regulation of PTEN gene transcription / cellular response to amino acid stimulus / regulation of autophagy / protein serine/threonine kinase activator activity / VEGFR2 mediated vascular permeability / phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of translation / regulation of actin cytoskeleton organization / TP53 Regulates Metabolic Genes / non-specific protein-tyrosine kinase / cellular response to glucose stimulus / G1/S transition of mitotic cell cycle / regulation of cell growth / non-membrane spanning protein tyrosine kinase activity / phosphoprotein binding / response to nutrient levels / PML body / regulation of circadian rhythm / small GTPase binding Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.23 Å | ||||||
Authors | Pavletich, N.P. / Yang, H. | ||||||
| Funding support | United States, 1items
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Citation | Journal: Nature / Year: 2017Title: Mechanisms of mTORC1 activation by RHEB and inhibition by PRAS40. Authors: Haijuan Yang / Xiaolu Jiang / Buren Li / Hyo J Yang / Meredith Miller / Angela Yang / Ankita Dhar / Nikola P Pavletich / ![]() Abstract: The mechanistic target of rapamycin complex 1 (mTORC1) controls cell growth and metabolism in response to nutrients, energy levels, and growth factors. It contains the atypical kinase mTOR and the ...The mechanistic target of rapamycin complex 1 (mTORC1) controls cell growth and metabolism in response to nutrients, energy levels, and growth factors. It contains the atypical kinase mTOR and the RAPTOR subunit that binds to the Tor signalling sequence (TOS) motif of substrates and regulators. mTORC1 is activated by the small GTPase RHEB (Ras homologue enriched in brain) and inhibited by PRAS40. Here we present the 3.0 ångström cryo-electron microscopy structure of mTORC1 and the 3.4 ångström structure of activated RHEB-mTORC1. RHEB binds to mTOR distally from the kinase active site, yet causes a global conformational change that allosterically realigns active-site residues, accelerating catalysis. Cancer-associated hyperactivating mutations map to structural elements that maintain the inactive state, and we provide biochemical evidence that they mimic RHEB relieving auto-inhibition. We also present crystal structures of RAPTOR-TOS motif complexes that define the determinants of TOS recognition, of an mTOR FKBP12-rapamycin-binding (FRB) domain-substrate complex that establishes a second substrate-recruitment mechanism, and of a truncated mTOR-PRAS40 complex that reveals PRAS40 inhibits both substrate-recruitment sites. These findings help explain how mTORC1 selects its substrates, how its kinase activity is controlled, and how it is activated by cancer-associated mutations. | ||||||
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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 | 6bcx.cif.gz | 2.6 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6bcx.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 6bcx.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/bc/6bcx ftp://data.pdbj.org/pub/pdb/validation_reports/bc/6bcx | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 7087MC ![]() 7086C ![]() 5wbhC ![]() 5wbiC ![]() 5wbjC ![]() 5wbkC ![]() 5wblC ![]() 5wbuC ![]() 5wbyC ![]() 6bcuC 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
-Protein , 4 types, 8 molecules ABDEWYXZ
| #1: Protein | Mass: 287399.125 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: MTOR, FRAP, FRAP1, FRAP2, RAFT1, RAPT1 / Production host: Homo sapiens (human)References: UniProt: P42345, non-specific serine/threonine protein kinase #2: Protein | Mass: 35910.090 Da / Num. of mol.: 2 / Fragment: mLST8 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: MLST8, GBL, LST8 / Production host: Homo sapiens (human) / References: UniProt: Q9BVC4#3: Protein | Mass: 150197.000 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: RPTOR, KIAA1303, RAPTOR / Production host: Homo sapiens (human) / References: UniProt: Q8N122#4: Protein | Mass: 12951.344 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: EIF4EBP1 / Production host: Homo sapiens (human) / References: UniProt: Q13541 |
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-Non-polymers , 2 types, 6 molecules 


| #5: Chemical | | #6: Chemical | ChemComp-MG / |
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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: Dimer of two mTOR-mLST8-RAPTOR-4EBP1 complexes. / Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT |
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| Molecular weight | Experimental value: NO |
| Source (natural) | Organism: Homo sapiens (human) |
| Source (recombinant) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 8 |
| 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Electron dose: 56 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
| Software | Name: REFMAC / Version: 5.8.0158 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C2 (2 fold cyclic) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.23 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 580768 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: AB INITIO MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 3.23→3.23 Å / Cor.coef. Fo:Fc: 0.859 / SU B: 23.164 / SU ML: 0.172 / ESU R: 0.272 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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| Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 31.329 Å2
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| Refinement step | Cycle: 1 / Total: 56580 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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About Yorodumi




Homo sapiens (human)
United States, 1items
Citation
UCSF Chimera

















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