- EMDB-10133: cryo-EM structure of mTORC1 bound to active RagA/C GTPases -
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Basic information
Entry
Database: EMDB / ID: EMD-10133
Title
cryo-EM structure of mTORC1 bound to active RagA/C GTPases
Map data
Cryo-EM structure of mTORC1 bound to active RagA/C GTPases. The Final map for the coordinates.
Sample
Complex: cryo-EM structure of mTORC1 bound to active RagA/C complex
Complex: mTORC1
Protein or peptide: mTOR,Serine/threonine-protein kinase mTOR,mTOR,Serine/threonine-protein kinase mTOR
Protein or peptide: Target of rapamycin complex subunit LST8
Complex: RagA/C
Protein or peptide: Ras-related GTP-binding protein A
Protein or peptide: Ras-related GTP-binding protein C
Protein or peptide: Regulatory-associated protein of mTOR
Ligand: GUANOSINE-5'-TRIPHOSPHATE
Ligand: GUANOSINE-5'-DIPHOSPHATE
Keywords
small GTPases / mTORC1 activator / roadblock domain / GTPase domain / SIGNALING PROTEIN
Function / homology
Function and homology information
Gtr1-Gtr2 GTPase complex / FNIP-folliculin RagC/D GAP / positive regulation of cytoplasmic translational initiation / positive regulation of pentose-phosphate shunt / RNA polymerase III type 1 promoter sequence-specific DNA binding / RNA polymerase III type 2 promoter sequence-specific DNA binding / T-helper 1 cell lineage commitment / regulation of locomotor rhythm / positive regulation of wound healing, spreading of epidermal cells / cellular response to leucine starvation ...Gtr1-Gtr2 GTPase complex / FNIP-folliculin RagC/D GAP / positive regulation of cytoplasmic translational initiation / positive regulation of pentose-phosphate shunt / RNA polymerase III type 1 promoter sequence-specific DNA binding / RNA polymerase III type 2 promoter sequence-specific DNA binding / T-helper 1 cell lineage commitment / regulation of locomotor rhythm / positive regulation of wound healing, spreading of epidermal cells / cellular response to leucine starvation / regulation of TORC1 signaling / regulation of membrane permeability / heart valve morphogenesis / TFIIIC-class transcription factor complex binding / negative regulation of lysosome organization / RNA polymerase III type 3 promoter sequence-specific DNA binding / TORC2 complex / TORC1 complex / positive regulation of transcription of nucleolar large rRNA by RNA polymerase I / protein localization to lysosome / regulation of autophagosome assembly / calcineurin-NFAT signaling cascade / nucleus localization / TORC1 signaling / voluntary musculoskeletal movement / positive regulation of odontoblast differentiation / regulation of osteoclast differentiation / positive regulation of keratinocyte migration / regulation of TOR signaling / cellular response to L-leucine / MTOR signalling / Amino acids regulate mTORC1 / cellular response to nutrient / energy reserve metabolic process / Energy dependent regulation of mTOR by LKB1-AMPK / negative regulation of cell size / ruffle organization / protein serine/threonine kinase inhibitor activity / protein localization to membrane / positive regulation of osteoclast differentiation / cellular response to osmotic stress / enzyme-substrate adaptor activity / negative regulation of protein localization to nucleus / anoikis / cardiac muscle cell development / positive regulation of transcription by RNA polymerase III / negative regulation of calcineurin-NFAT signaling cascade / regulation of myelination / regulation of cell size / Macroautophagy / positive regulation of oligodendrocyte differentiation / small GTPase-mediated signal transduction / negative regulation of macroautophagy / positive regulation of actin filament polymerization / lysosome organization / positive regulation of myotube differentiation / protein kinase activator activity / behavioral response to pain / oligodendrocyte differentiation / mTORC1-mediated signalling / Constitutive Signaling by AKT1 E17K in Cancer / germ cell development / CD28 dependent PI3K/Akt signaling / cellular response to nutrient levels / positive regulation of phosphoprotein phosphatase activity / social behavior / HSF1-dependent transactivation / TOR signaling / positive regulation of TOR signaling / neuronal action potential / positive regulation of translational initiation / response to amino acid / positive regulation of G1/S transition of mitotic cell cycle / regulation of macroautophagy / endomembrane system / 'de novo' pyrimidine nucleobase biosynthetic process / positive regulation of epithelial to mesenchymal transition / positive regulation of lamellipodium assembly / positive regulation of lipid biosynthetic process / heart morphogenesis / cardiac muscle contraction / regulation of cellular response to heat / protein-membrane adaptor activity / positive regulation of stress fiber assembly / 14-3-3 protein binding / cytoskeleton organization / positive regulation of endothelial cell proliferation / positive regulation of TORC1 signaling / tumor necrosis factor-mediated signaling pathway / T cell costimulation / cellular response to amino acid starvation / positive regulation of glycolytic process / cellular response to starvation / phagocytic vesicle / negative regulation of autophagy / protein serine/threonine kinase activator activity / RNA splicing / response to nutrient levels / response to nutrient / post-embryonic development Similarity search - Function
Raptor, N-terminal CASPase-like domain / Raptor N-terminal CASPase like domain / Raptor N-terminal CASPase like domain / Regulatory associated protein of TOR / RagA/B / Gtr1/RagA G protein / RagC/D / Gtr1/RagA G protein conserved region / Target of rapamycin complex subunit LST8 / Domain of unknown function DUF3385, target of rapamycin protein ...Raptor, N-terminal CASPase-like domain / Raptor N-terminal CASPase like domain / Raptor N-terminal CASPase like domain / Regulatory associated protein of TOR / RagA/B / Gtr1/RagA G protein / RagC/D / Gtr1/RagA G protein conserved region / Target of rapamycin complex subunit LST8 / Domain of unknown function DUF3385, target of rapamycin protein / Serine/threonine-protein kinase mTOR domain / Domain of unknown function / FKBP12-rapamycin binding domain / Serine/threonine-protein kinase TOR / FKBP12-rapamycin binding domain superfamily / FKBP12-rapamycin binding domain / HEAT repeat / HEAT repeat / Rapamycin binding domain / PIK-related kinase, FAT / FAT domain / FATC domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / Quinoprotein alcohol dehydrogenase-like superfamily / Phosphatidylinositol 3- and 4-kinases signature 1. / Phosphatidylinositol 3/4-kinase, conserved site / Phosphatidylinositol 3- and 4-kinases signature 2. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / Armadillo-like helical / Tetratricopeptide-like helical domain superfamily / Armadillo-type fold / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / Protein kinase-like domain superfamily / P-loop containing nucleoside triphosphate hydrolase Similarity search - Domain/homology
Serine/threonine-protein kinase mTOR / Ras-related GTP-binding protein A / Regulatory-associated protein of mTOR / Target of rapamycin complex subunit LST8 / Ras-related GTP-binding protein C Similarity search - Component
Biological species
Homo sapiens (human)
Method
single particle reconstruction / cryo EM / Resolution: 6.2 Å
Journal: Science / Year: 2019 Title: Architecture of human Rag GTPase heterodimers and their complex with mTORC1. Authors: Madhanagopal Anandapadamanaban / Glenn R Masson / Olga Perisic / Alex Berndt / Jonathan Kaufman / Chris M Johnson / Balaji Santhanam / Kacper B Rogala / David M Sabatini / Roger L Williams / Abstract: The Rag guanosine triphosphatases (GTPases) recruit the master kinase mTORC1 to lysosomes to regulate cell growth and proliferation in response to amino acid availability. The nucleotide state of Rag ...The Rag guanosine triphosphatases (GTPases) recruit the master kinase mTORC1 to lysosomes to regulate cell growth and proliferation in response to amino acid availability. The nucleotide state of Rag heterodimers is critical for their association with mTORC1. Our cryo-electron microscopy structure of RagA/RagC in complex with mTORC1 shows the details of RagA/RagC binding to the RAPTOR subunit of mTORC1 and explains why only the RagA/RagC nucleotide state binds mTORC1. Previous kinetic studies suggested that GTP binding to one Rag locks the heterodimer to prevent GTP binding to the other. Our crystal structures and dynamics of RagA/RagC show the mechanism for this locking and explain how oncogenic hotspot mutations disrupt this process. In contrast to allosteric activation by RHEB, Rag heterodimer binding does not change mTORC1 conformation and activates mTORC1 by targeting it to lysosomes.
History
Deposition
Jul 18, 2019
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Header (metadata) release
Oct 16, 2019
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Map release
Oct 16, 2019
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Update
May 22, 2024
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Current status
May 22, 2024
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
Cryogen name: ETHANE / Chamber humidity: 95 % / Instrument: FEI VITROBOT MARK III
Details
mTORC1 (mTOR complex 1) is a dimer consists of three proteins: mTOR, mLST8 and RAPTOR. The small GTPases, RagA/C in its active form bind to mTORC1 for activation. We solved the cryo-EM structure of mTORC1 bound to RagA/C.
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Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Frames/image: 1-22 / Average exposure time: 1.8 sec. / Average electron dose: 40.0 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
Details: For building the mTORC1 structure we used the previously published apo-mTORC1 structure 6BCX, and for RagA/C structure we used our high-resolution crystal structure PDB ID 6S6A.
Final reconstruction
Applied symmetry - Point group: C1 (asymmetric) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 6.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0.6) Details: For the final reconstruction of mTORC1-RagA/C structure we used a strategy taking advantage of the relion particle symmetry expand program, and duplicated the C2-refined particles and ...Details: For the final reconstruction of mTORC1-RagA/C structure we used a strategy taking advantage of the relion particle symmetry expand program, and duplicated the C2-refined particles and applied the appropriate rotation and translation to generate a set of monomers. We performed mTORC1-RagA/C 'pseudo-monomer' focussed classification with signal subtraction and obtained a reconstruction of 6.2 A resolution map. This cryo-EM density corresponded to the mTORC1-RagA/C pseudomonomer, where the previously published structure for apo-mTORC1 (PDB ID 6BCX) and our high-resolution crystal structure of RagA/C (6S6A) were fitted with great confidence from our experimental analysis including Pulldown assays, mutational at per-residue level in the binding interface and HDX-Mass Spectrometry. Number images used: 51902
Initial angle assignment
Type: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0.6)
Final angle assignment
Type: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0.6)
source_name: PDB, initial_model_type: experimental model
Details
Cryo-EM model of mTORC1-RagA/C was refined using REFMAC5 program in CCPEM package, with a composite map of the 3D reconstruction of mTORC1-RagA/C pseudo-monomer (as mentioned in Reconstruction section) of one protomer together with the generated map for the other second protomer of mTORC1-RagA/C. This second protomer of mTORC1-RagA/C map was generated by simply aligning the first 3D reconstructed pseudomonomer map onto the mTORC1 dimer consensus C2 map and then obtained the rotation-translation matrix with CHIMERA and then used Maputils program in CCP4i. From the resulting mTORC1-RagA/C dimer map, the model of mTORC1-RagA/C was built by using previously published structure of apo-mTORC1 (PDB ID 6BCX) and our crystal structure of RagA/C was fitted (PDB ID 6S6A, unreleased). The entire mTORC1-RagA/C final model was refined using REFMAC5 program using the restraints from the crystal structure of RagA/C and previously published mTORC1 structure. Side chains were removed before refinement, since these were not evident in the cryo-EM densities. Separate model refinements were performed against single half-maps, and the resulting models were compared with the other half-maps to confirm the absence of overfitting.
Refinement
Space: REAL / Protocol: RIGID BODY FIT / Overall B value: 315
Output model
PDB-6sb2: cryo-EM structure of mTORC1 bound to active RagA/C GTPases
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