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- PDB-6bcu: Cryo-EM structure of the activated RHEB-mTORC1 refined to 3.4 angstrom -
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Open data
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Basic information
Entry | Database: PDB / ID: 6bcu | ||||||
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Title | Cryo-EM structure of the activated RHEB-mTORC1 refined to 3.4 angstrom | ||||||
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![]() | TRANSFERASE / PIKK | ||||||
Function / homology | ![]() regulation of type B pancreatic cell development / RNA polymerase III type 2 promoter sequence-specific DNA binding / RNA polymerase III type 1 promoter sequence-specific DNA binding / positive regulation of cytoplasmic translational initiation / T-helper 1 cell lineage commitment / positive regulation of pentose-phosphate shunt / regulation of locomotor rhythm / Activation of the mRNA upon binding of the cap-binding complex and eIFs, and subsequent binding to 43S / positive regulation of wound healing, spreading of epidermal cells / eukaryotic initiation factor 4E binding ...regulation of type B pancreatic cell development / RNA polymerase III type 2 promoter sequence-specific DNA binding / RNA polymerase III type 1 promoter sequence-specific DNA binding / positive regulation of cytoplasmic translational initiation / T-helper 1 cell lineage commitment / positive regulation of pentose-phosphate shunt / regulation of locomotor rhythm / Activation of the mRNA upon binding of the cap-binding complex and eIFs, and subsequent binding to 43S / positive regulation of wound healing, spreading of epidermal cells / eukaryotic initiation factor 4E binding / TORC2 signaling / TORC2 complex / regulation of membrane permeability / cellular response to leucine starvation / heart valve morphogenesis / negative regulation of lysosome organization / TFIIIC-class transcription factor complex binding / TORC1 complex / positive regulation of transcription of nucleolar large rRNA by RNA polymerase I / calcineurin-NFAT signaling cascade / voluntary musculoskeletal movement / positive regulation of odontoblast differentiation / regulation of osteoclast differentiation / RNA polymerase III type 3 promoter sequence-specific DNA binding / positive regulation of keratinocyte migration / regulation of lysosome organization / Amino acids regulate mTORC1 / cellular response to L-leucine / MTOR signalling / cellular response to nutrient / regulation of autophagosome assembly / Energy dependent regulation of mTOR by LKB1-AMPK / TORC1 signaling / energy reserve metabolic process / ruffle organization / serine/threonine protein kinase complex / negative regulation of cell size / cellular response to methionine / positive regulation of osteoclast differentiation / positive regulation of ubiquitin-dependent protein catabolic process / inositol hexakisphosphate binding / cellular response to osmotic stress / anoikis / protein serine/threonine kinase inhibitor activity / negative regulation of protein localization to nucleus / cardiac muscle cell development / negative regulation of cold-induced thermogenesis / negative regulation of calcineurin-NFAT signaling cascade / regulation of myelination / positive regulation of transcription by RNA polymerase III / positive regulation of peptidyl-threonine phosphorylation / positive regulation of actin filament polymerization / negative regulation of macroautophagy / small GTPase-mediated signal transduction / Macroautophagy / regulation of cell size / positive regulation of myotube differentiation / Constitutive Signaling by AKT1 E17K in Cancer / social behavior / oligodendrocyte differentiation / germ cell development / behavioral response to pain / TOR signaling / mTORC1-mediated signalling / positive regulation of oligodendrocyte differentiation / positive regulation of translational initiation / protein kinase activator activity / CD28 dependent PI3K/Akt signaling / positive regulation of TOR signaling / response to amino acid / HSF1-dependent transactivation / positive regulation of G1/S transition of mitotic cell cycle / regulation of macroautophagy / enzyme-substrate adaptor activity / 'de novo' pyrimidine nucleobase biosynthetic process / cellular response to nutrient levels / vascular endothelial cell response to laminar fluid shear stress / neuronal action potential / positive regulation of lipid biosynthetic process / positive regulation of epithelial to mesenchymal transition / heart morphogenesis / regulation of cellular response to heat / positive regulation of lamellipodium assembly / cardiac muscle contraction / positive regulation of peptidyl-serine phosphorylation / phagocytic vesicle / positive regulation of stress fiber assembly / translation repressor activity / translation initiation factor binding / negative regulation of translational initiation / positive regulation of endothelial cell proliferation / 14-3-3 protein binding / T cell costimulation / cytoskeleton organization / positive regulation of TORC1 signaling / endomembrane system / positive regulation of mitotic cell cycle / negative regulation of autophagy / cellular response to amino acid starvation / protein serine/threonine kinase activator activity Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | ||||||
![]() | Pavletich, N.P. / Yang, H. | ||||||
Funding support | ![]()
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![]() | ![]() Title: 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. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 2.7 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 7086MC ![]() 7087C ![]() 5wbhC ![]() 5wbiC ![]() 5wbjC ![]() 5wbkC ![]() 5wblC ![]() 5wbuC ![]() 5wbyC ![]() 6bcxC 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 , 5 types, 10 molecules ABDEWYXZSR
#1: Protein | Mass: 287399.125 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P42345, non-specific serine/threonine protein kinase #2: Protein | Mass: 35910.090 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #3: Protein | Mass: 150197.000 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #4: Protein | Mass: 12951.344 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() #5: Protein | Mass: 20877.826 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Non-polymers , 3 types, 10 molecules 




#6: Chemical | #7: Chemical | ChemComp-MG / #8: Chemical | |
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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: active complex / Type: COMPLEX / Entity ID: #1-#5 / Source: RECOMBINANT |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
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: ![]() |
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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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C2 (2 fold cyclic) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 198237 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Resolution: 3.8→3.8 Å / Cor.coef. Fo:Fc: 0.869 / SU B: 44.652 / SU ML: 0.268 / ESU R: 0.473 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: 0.9 Å / Shrinkage radii: 0.9 Å / VDW probe radii: 1 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 40.812 Å2
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Refinement step | Cycle: 1 / Total: 59662 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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