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- PDB-8dd8: PI 3-kinase alpha with nanobody 3-142, crosslinked with DSG -

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Basic information

Entry
Database: PDB / ID: 8dd8
TitlePI 3-kinase alpha with nanobody 3-142, crosslinked with DSG
Components
  • Phosphatidylinositol 3-kinase regulatory subunit alpha
  • Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
KeywordsTRANSFERASE / Phosphoinositide 3-kinase (PI3K) / activation / inhibition / nanobody / conformational changes / STRUCTURAL PROTEIN
Function / homology
Function and homology information


perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / phosphatidylinositol kinase activity / regulation of actin filament organization / negative regulation of actin filament depolymerization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response ...perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / phosphatidylinositol kinase activity / regulation of actin filament organization / negative regulation of actin filament depolymerization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / response to L-leucine / IRS-mediated signalling / phosphatidylinositol 3-kinase activator activity / T follicular helper cell differentiation / interleukin-18-mediated signaling pathway / PI3K events in ERBB4 signaling / phosphatidylinositol 3-kinase regulatory subunit binding / myeloid leukocyte migration / neurotrophin TRKA receptor binding / cellular response to hydrostatic pressure / positive regulation of focal adhesion disassembly / autosome genomic imprinting / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / transmembrane receptor protein tyrosine kinase adaptor activity / Activated NTRK3 signals through PI3K / phosphatidylinositol 3-kinase complex, class IB / ErbB-3 class receptor binding / phosphatidylinositol 3-kinase complex / negative regulation of stress fiber assembly / TORC2 signaling / positive regulation of protein localization to membrane / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / vasculature development / RHOD GTPase cycle / regulation of cellular respiration / Nephrin family interactions / anoikis / RHOF GTPase cycle / Signaling by LTK / Signaling by LTK in cancer / 1-phosphatidylinositol-4-phosphate 3-kinase activity / kinase activator activity / relaxation of cardiac muscle / positive regulation of leukocyte migration / MET activates PI3K/AKT signaling / RND1 GTPase cycle / phosphatidylinositol 3-kinase complex, class IA / RND2 GTPase cycle / positive regulation of filopodium assembly / PI3K/AKT activation / phosphatidylinositol-4,5-bisphosphate 3-kinase / RND3 GTPase cycle / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / phosphatidylinositol 3-kinase / growth hormone receptor signaling pathway / phosphatidylinositol-3-phosphate biosynthetic process / insulin binding / cardiac muscle cell contraction / Signaling by ALK / 1-phosphatidylinositol-3-kinase activity / RHOV GTPase cycle / vascular endothelial growth factor signaling pathway / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / PI-3K cascade:FGFR3 / RHOB GTPase cycle / natural killer cell mediated cytotoxicity / GP1b-IX-V activation signalling / response to dexamethasone / negative regulation of macroautophagy / PI-3K cascade:FGFR2 / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / negative regulation of osteoclast differentiation / phosphatidylinositol phosphate biosynthetic process / phosphatidylinositol-mediated signaling / Synthesis of PIPs at the plasma membrane / RHOU GTPase cycle / RET signaling / CDC42 GTPase cycle / negative regulation of anoikis / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K Cascade / PI3K events in ERBB2 signaling / T cell differentiation / intercalated disc / RHOG GTPase cycle / extrinsic apoptotic signaling pathway via death domain receptors / negative regulation of cell-matrix adhesion / CD28 dependent PI3K/Akt signaling / regulation of multicellular organism growth / Role of LAT2/NTAL/LAB on calcium mobilization / RHOA GTPase cycle / RAC2 GTPase cycle / RAC3 GTPase cycle
Similarity search - Function
PI3Kalpha, catalytic domain / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / Rho GTPase-activating protein domain ...PI3Kalpha, catalytic domain / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / Rho GTPase-activating protein domain / RhoGAP domain / Rho GTPase-activating proteins domain profile. / GTPase-activator protein for Rho-like GTPases / Phosphatidylinositol 3-kinase, adaptor-binding domain / Phosphatidylinositol 3-kinase adaptor-binding (PI3K ABD) domain profile. / PI3-kinase family, Ras-binding domain / Phosphatidylinositol 3-kinase Ras-binding (PI3K RBD) domain / PI3-kinase family, ras-binding domain / Phosphatidylinositol 3-kinase Ras-binding (PI3K RBD) domain profile. / Rho GTPase activation protein / C2 phosphatidylinositol 3-kinase-type domain / Phosphoinositide 3-kinase C2 / C2 phosphatidylinositol 3-kinase (PI3K)-type domain profile. / Phosphoinositide 3-kinase, region postulated to contain C2 domain / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / Phosphoinositide 3-kinase, accessory (PIK) domain superfamily / Phosphoinositide 3-kinase, accessory (PIK) domain / Phosphatidylinositol kinase / PIK helical 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 / C2 domain superfamily / SH2 domain / Src homology 2 (SH2) domain profile. / Src homology 2 domains / SH2 domain / Src homology 3 domains / SH2 domain superfamily / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Armadillo-type fold / Ubiquitin-like domain superfamily / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Phosphatidylinositol 3-kinase regulatory subunit alpha / Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsHart, J.R. / Liu, X. / Pan, C. / Liang, A. / Ueno, L. / Xu, Y. / Quezada, A. / Zou, X. / Yang, S. / Zhou, Q. ...Hart, J.R. / Liu, X. / Pan, C. / Liang, A. / Ueno, L. / Xu, Y. / Quezada, A. / Zou, X. / Yang, S. / Zhou, Q. / Schoonooghe, S. / Hassanzadeh-Ghassabeh, G. / Xia, T. / Shui, W. / Yang, D. / Vogt, P.K. / Wang, M.-W.
Funding support United States, China, 15items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R35 CA197582 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)R50 CA243899 United States
National Natural Science Foundation of China (NSFC)81872915 China
National Natural Science Foundation of China (NSFC)82073904 China
National Natural Science Foundation of China (NSFC)82121005 China
National Natural Science Foundation of China (NSFC)81973373 China
National Natural Science Foundation of China (NSFC)31971362 China
National Natural Science Foundation of China (NSFC)32171439 China
National Natural Science Foundation of China (NSFC)21704064 China
Other government2018ZX09735 001
Other government2018ZX09711002 002 005
Other government2021ZD0203400
Other government2018YFA0507000
Other privateNNCAS 2017 1 CC
Hainan Provincial Major Science and Technology ProjectZDKJ2021028 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Nanobodies and chemical cross-links advance the structural and functional analysis of PI3Kα.
Authors: Jonathan R Hart / Xiao Liu / Chen Pan / Anyi Liang / Lynn Ueno / Yingna Xu / Alexandra Quezada / Xinyu Zou / Su Yang / Qingtong Zhou / Steve Schoonooghe / Gholamreza Hassanzadeh-Ghassabeh / ...Authors: Jonathan R Hart / Xiao Liu / Chen Pan / Anyi Liang / Lynn Ueno / Yingna Xu / Alexandra Quezada / Xinyu Zou / Su Yang / Qingtong Zhou / Steve Schoonooghe / Gholamreza Hassanzadeh-Ghassabeh / Tian Xia / Wenqing Shui / Dehua Yang / Peter K Vogt / Ming-Wei Wang /
Abstract: Nanobodies and chemical cross-linking were used to gain information on the identity and positions of flexible domains of PI3Kα. The application of chemical cross-linking mass spectrometry (CXMS) ...Nanobodies and chemical cross-linking were used to gain information on the identity and positions of flexible domains of PI3Kα. The application of chemical cross-linking mass spectrometry (CXMS) facilitated the identification of the p85 domains BH, cSH2, and SH3 as well as their docking positions on the PI3Kα catalytic core. Binding of individual nanobodies to PI3Kα induced activation or inhibition of enzyme activity and caused conformational changes that could be correlated with enzyme function. Binding of nanobody Nb3-126 to the BH domain of p85α substantially improved resolution for parts of the PI3Kα complex, and binding of nanobody Nb3-159 induced a conformation of PI3Kα that is distinct from known PI3Kα structures. The analysis of CXMS data also provided mechanistic insights into the molecular underpinning of the flexibility of PI3Kα.
History
DepositionJun 17, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 21, 2022Provider: repository / Type: Initial release
Revision 1.1Jun 12, 2024Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id ..._em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
B: Phosphatidylinositol 3-kinase regulatory subunit alpha


Theoretical massNumber of molelcules
Total (without water)211,4462
Polymers211,4462
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: immunoprecipitation, native gel electrophoresis, immunoprecipitation, cross-linking, mass spectrometry
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform / PtdIns-3-kinase subunit alpha / Phosphatidylinositol 4 / 5-bisphosphate 3-kinase 110 kDa catalytic ...PtdIns-3-kinase subunit alpha / Phosphatidylinositol 4 / 5-bisphosphate 3-kinase 110 kDa catalytic subunit alpha / p110alpha / Phosphoinositide-3-kinase catalytic alpha polypeptide / Serine/threonine protein kinase PIK3CA


Mass: 127822.578 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PIK3CA / Production host: Trichoplusia ni (cabbage looper)
References: UniProt: P42336, phosphatidylinositol-4,5-bisphosphate 3-kinase, non-specific serine/threonine protein kinase
#2: Protein Phosphatidylinositol 3-kinase regulatory subunit alpha / PI3-kinase regulatory subunit alpha / PI3K regulatory subunit alpha / PtdIns-3-kinase regulatory ...PI3-kinase regulatory subunit alpha / PI3K regulatory subunit alpha / PtdIns-3-kinase regulatory subunit alpha / Phosphatidylinositol 3-kinase 85 kDa regulatory subunit alpha / PI3-kinase subunit p85-alpha / PtdIns-3-kinase regulatory subunit p85-alpha


Mass: 83623.203 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PIK3R1, GRB1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P27986

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-142 bound
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.6
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: OTHER / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 70 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refine1.19.2_4158refinement
PHENIX1.19.2_4158refinement
EM software
IDNameVersionCategory
7PHENIX1.19.2-4158model fitting
9PHENIX1.19.2-4158model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1615129
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 217230 / Symmetry type: POINT
Atomic model buildingB value: 43.84 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient
Atomic model buildingPDB-ID: 7MYN

7myn


Accession code: 7MYN / Source name: PDB / Type: experimental model
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 49.45 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.003510715
ELECTRON MICROSCOPYf_angle_d0.593314447
ELECTRON MICROSCOPYf_chiral_restr0.04421558
ELECTRON MICROSCOPYf_plane_restr0.00391854
ELECTRON MICROSCOPYf_dihedral_angle_d4.27411393

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