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- PDB-9dbo: Crystal structure of a synthetic Fab (R3E9) in complex with the F... -

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Basic information

Entry
Database: PDB / ID: 9dbo
TitleCrystal structure of a synthetic Fab (R3E9) in complex with the FRB domain of mTOR
Components
  • Fab heavy chain
  • Fab light chain
  • Serine/threonine-protein kinase mTOR
KeywordsTransferase/Immune System / kinase / inhibitor / antibody / SIGNALING PROTEIN / Transferase-Immune System complex
Function / homology
Function and homology information


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 / positive regulation of wound healing, spreading of epidermal cells / TORC2 signaling / TORC2 complex / regulation of membrane permeability ...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 / positive regulation of wound healing, spreading of epidermal cells / 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 / 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 ubiquitin-dependent protein catabolic process / inositol hexakisphosphate binding / cellular response to osmotic stress / anoikis / negative regulation of protein localization to nucleus / cardiac muscle cell development / negative regulation of calcineurin-NFAT signaling cascade / regulation of myelination / positive regulation of transcription by RNA polymerase III / positive regulation of actin filament polymerization / negative regulation of macroautophagy / Macroautophagy / regulation of cell size / positive regulation of myotube differentiation / Constitutive Signaling by AKT1 E17K in Cancer / oligodendrocyte differentiation / germ cell development / behavioral response to pain / TOR signaling / mTORC1-mediated signalling / positive regulation of oligodendrocyte differentiation / positive regulation of translational initiation / CD28 dependent PI3K/Akt signaling / response to amino acid / HSF1-dependent transactivation / regulation of macroautophagy / '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 / phagocytic vesicle / positive regulation of stress fiber assembly / T cell costimulation / cytoskeleton organization / endomembrane system / negative regulation of autophagy / cellular response to amino acid starvation / positive regulation of glycolytic process / cellular response to starvation / regulation of signal transduction by p53 class mediator / Regulation of PTEN gene transcription / post-embryonic development / positive regulation of translation / VEGFR2 mediated vascular permeability / TP53 Regulates Metabolic Genes / regulation of actin cytoskeleton organization / phosphoprotein binding / cellular response to amino acid stimulus / non-specific protein-tyrosine kinase / regulation of cell growth / macroautophagy / response to nutrient levels / regulation of circadian rhythm / protein destabilization / PML body / multicellular organism growth / cellular response to insulin stimulus / Regulation of TP53 Degradation / nuclear envelope / PIP3 activates AKT signaling
Similarity search - Function
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 / Rapamycin binding domain / Serine/threonine-protein kinase ATR-like, HEAT repeats / : ...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 / Rapamycin binding domain / Serine/threonine-protein kinase ATR-like, HEAT repeats / : / FATC domain / PIK-related kinase, FAT / FAT domain / FATC / FATC domain / PIK-related kinase / FAT domain profile. / FATC domain profile. / 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 / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Serine/threonine-protein kinase mTOR
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.55 Å
AuthorsO'Leary, K.M. / Slezak, T. / Kossiakoff, A.A.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Proc.Natl.Acad.Sci.USA / Year: 2025
Title: Conformation-specific synthetic intrabodies modulate mTOR signaling with subcellular spatial resolution.
Authors: O'Leary, K.M. / Slezak, T. / Kossiakoff, A.A.
History
DepositionAug 23, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 11, 2025Provider: repository / Type: Initial release
Revision 1.1Jun 18, 2025Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
C: Serine/threonine-protein kinase mTOR
H: Fab heavy chain
L: Fab light chain


Theoretical massNumber of molelcules
Total (without water)58,2673
Polymers58,2673
Non-polymers00
Water9,872548
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: surface plasmon resonance
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6040 Å2
ΔGint-44 kcal/mol
Surface area23250 Å2
MethodPISA
Unit cell
Length a, b, c (Å)45.055, 69.732, 89.413
Angle α, β, γ (deg.)90.00, 90.12, 90.00
Int Tables number3
Space group name H-MP121
Components on special symmetry positions
IDModelComponents
11L-495-

HOH

21L-505-

HOH

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Components

#1: Protein Serine/threonine-protein kinase mTOR / FK506-binding protein 12-rapamycin complex-associated protein 1 / FKBP12-rapamycin complex- ...FK506-binding protein 12-rapamycin complex-associated protein 1 / FKBP12-rapamycin complex-associated protein / Mammalian target of rapamycin / mTOR / Mechanistic target of rapamycin / Rapamycin and FKBP12 target 1 / Rapamycin target protein 1


Mass: 11290.907 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MTOR, FRAP, FRAP1, FRAP2, RAFT1, RAPT1 / Production host: Escherichia coli (E. coli)
References: UniProt: P42345, non-specific serine/threonine protein kinase
#2: Antibody Fab heavy chain


Mass: 23866.652 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#3: Antibody Fab light chain


Mass: 23109.658 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 548 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.41 Å3/Da / Density % sol: 48.97 %
Crystal growTemperature: 293.15 K / Method: vapor diffusion, hanging drop / Details: 0.2 M Calcium chloride dihydrate 16% PEG 3350

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 23-ID-D / Wavelength: 1.0332 Å
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Apr 6, 2023
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.0332 Å / Relative weight: 1
ReflectionResolution: 1.55→45.1 Å / Num. obs: 75458 / % possible obs: 93.95 % / Redundancy: 1.9 % / CC1/2: 0.994 / Net I/σ(I): 6.7
Reflection shellResolution: 1.55→1.61 Å / Num. unique obs: 5684 / CC1/2: 0.475

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Processing

Software
NameVersionClassification
PHENIXv1.21.1refinement
XDSdata reduction
XDSdata scaling
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.55→45.1 Å / SU B: 4.389 / SU ML: 0.074 / Cross valid method: THROUGHOUT / ESU R: 0.087 / ESU R Free: 0.089 / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
RfactorNum. reflection% reflectionSelection details
Rfree0.21696 3812 5.1 %RANDOM
Rwork0.18354 ---
obs0.18521 71645 93.94 %-
Displacement parametersBiso mean: 16.03 Å2
Baniso -1Baniso -2Baniso -3
1-0.15 Å2-0 Å2-0.33 Å2
2--0.85 Å2-0 Å2
3----1 Å2
Refinement stepCycle: LAST / Resolution: 1.55→45.1 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4099 0 0 548 4647

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