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Yorodumi- PDB-8gua: Cryo-EM structure of cancer-specific PI3Kalpha mutant E542K in co... -
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-Basic information
Entry | Database: PDB / ID: 8gua | ||||||||||||||||||||||||||||||||||||||||||
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Title | Cryo-EM structure of cancer-specific PI3Kalpha mutant E542K in complex with BYL-719 | ||||||||||||||||||||||||||||||||||||||||||
Components | Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform | ||||||||||||||||||||||||||||||||||||||||||
Keywords | STRUCTURAL PROTEIN / Phosphoinositide 3-kinase (PI3K) / helical domain / mutation / cancers | ||||||||||||||||||||||||||||||||||||||||||
Function / homology | Function and homology information response to muscle inactivity / negative regulation of actin filament depolymerization / response to L-leucine / regulation of actin filament organization / response to butyrate / IRS-mediated signalling / cellular response to hydrostatic pressure / autosome genomic imprinting / PI3K events in ERBB4 signaling / Activated NTRK2 signals through PI3K ...response to muscle inactivity / negative regulation of actin filament depolymerization / response to L-leucine / regulation of actin filament organization / response to butyrate / IRS-mediated signalling / cellular response to hydrostatic pressure / autosome genomic imprinting / PI3K events in ERBB4 signaling / Activated NTRK2 signals through PI3K / positive regulation of protein localization to membrane / Activated NTRK3 signals through PI3K / negative regulation of fibroblast apoptotic process / phosphatidylinositol 3-kinase complex, class IB / vasculature development / Signaling by cytosolic FGFR1 fusion mutants / regulation of cellular respiration / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IA / anoikis / phosphatidylinositol 3-kinase complex / Nephrin family interactions / Signaling by LTK in cancer / relaxation of cardiac muscle / Costimulation by the CD28 family / Signaling by LTK / 1-phosphatidylinositol-4-phosphate 3-kinase activity / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / MET activates PI3K/AKT signaling / PI3K/AKT activation / phosphatidylinositol-4,5-bisphosphate 3-kinase / vascular endothelial growth factor signaling pathway / phosphatidylinositol 3-kinase / phosphatidylinositol-3-phosphate biosynthetic process / negative regulation of macroautophagy / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / PI-3K cascade:FGFR2 / protein kinase activator activity / response to dexamethasone / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / CD28 dependent PI3K/Akt signaling / Synthesis of PIPs at the plasma membrane / phosphatidylinositol-mediated signaling / phosphatidylinositol phosphate biosynthetic process / PI3K events in ERBB2 signaling / negative regulation of anoikis / intercalated disc / RET signaling / Interleukin-3, Interleukin-5 and GM-CSF signaling / insulin receptor substrate binding / regulation of multicellular organism growth / PI3K Cascade / endothelial cell migration / positive regulation of TOR signaling / RAC2 GTPase cycle / Role of phospholipids in phagocytosis / GAB1 signalosome / Role of LAT2/NTAL/LAB on calcium mobilization / Interleukin receptor SHC signaling / adipose tissue development / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / phagocytosis / positive regulation of lamellipodium assembly / Signaling by FGFR4 in disease / cardiac muscle contraction / energy homeostasis / Signaling by FLT3 ITD and TKD mutants / Signaling by FGFR3 in disease / Tie2 Signaling / GPVI-mediated activation cascade / Signaling by FGFR2 in disease / T cell costimulation / response to muscle stretch / Signaling by FLT3 fusion proteins / RAC1 GTPase cycle / FLT3 Signaling / Signaling by FGFR1 in disease / phosphatidylinositol 3-kinase/protein kinase B signal transduction / Downstream signal transduction / phosphorylation / insulin-like growth factor receptor signaling pathway / Signaling by phosphorylated juxtamembrane, extracellular and kinase domain KIT mutants / liver development / response to activity / Regulation of signaling by CBL / cellular response to glucose stimulus / positive regulation of smooth muscle cell proliferation / regulation of protein phosphorylation / Constitutive Signaling by EGFRvIII / Signaling by ERBB2 ECD mutants / epidermal growth factor receptor signaling pathway / Signaling by ERBB2 KD Mutants / Signaling by SCF-KIT / platelet activation / VEGFA-VEGFR2 Pathway Similarity search - Function | ||||||||||||||||||||||||||||||||||||||||||
Biological species | Homo sapiens (human) | ||||||||||||||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.77 Å | ||||||||||||||||||||||||||||||||||||||||||
Authors | Liu, X. / Zhou, Q. / Hart, J.R. / Xu, Y. / Yang, S. / Yang, D. / Vogt, P.K. / Wang, M.-W. | ||||||||||||||||||||||||||||||||||||||||||
Funding support | China, United States, 13items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2022 Title: Cryo-EM structures of cancer-specific helical and kinase domain mutations of PI3Kα. Authors: Xiao Liu / Qingtong Zhou / Jonathan R Hart / Yingna Xu / Su Yang / Dehua Yang / Peter K Vogt / Ming-Wei Wang / Abstract: Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that perform multiple and important cellular functions. The protein investigated here belongs to class IA of the PI3Ks; it is a dimer ...Phosphoinositide 3-kinases (PI3Ks) are a family of lipid kinases that perform multiple and important cellular functions. The protein investigated here belongs to class IA of the PI3Ks; it is a dimer consisting of a catalytic subunit, p110α, and a regulatory subunit, p85α, and is referred to as PI3Kα. The catalytic subunit p110α is frequently mutated in cancer. The mutations induce a gain of function and constitute a driving force in cancer development. About 80% of these mutations lead to single-amino-acid substitutions in one of three sites of p110α: two in the helical domain of the protein (E542K and E545K) and one at the C-terminus of the kinase domain (H1047R). Here, we report the cryo-electron microscopy structures of these mutants in complex with the p110α-specific inhibitor BYL-719. The H1047R mutant rotates its sidechain to a new position and weakens the kα11 activation loop interaction, thereby reducing the inhibitory effect of p85α on p110α. E542K and E545K completely abolish the tight interaction between the helical domain of p110α and the N-terminal SH2 domain of p85α and lead to the disruption of all p85α binding and a dramatic increase in flexibility of the adaptor-binding domain (ABD) in p110α. Yet, the dimerization of PI3Kα is preserved through the ABD-p85α interaction. The local and global structural features induced by these mutations provide molecular insights into the activation of PI3Kα, deepen our understanding of the oncogenic mechanism of this important signaling molecule, and may facilitate the development of mutant-specific inhibitors. | ||||||||||||||||||||||||||||||||||||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8gua.cif.gz | 173.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8gua.ent.gz | 129.9 KB | Display | PDB format |
PDBx/mmJSON format | 8gua.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/gu/8gua ftp://data.pdbj.org/pub/pdb/validation_reports/gu/8gua | HTTPS FTP |
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-Related structure data
Related structure data | 34271MC 8gubC 8gudC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 127822.641 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 3-kinase, phosphatidylinositol-4,5-bisphosphate 3-kinase, non-specific serine/threonine protein kinase |
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#2: Chemical | ChemComp-1LT / ( |
Has ligand of interest | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Human PI3Kalpha mutant E542K in complex with BYL-719 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: Homo sapiens (human) |
Source (recombinant) | Organism: Trichoplusia ni (cabbage looper) / Strain: Sf-9 |
Buffer solution | pH: 7.6 |
Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-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: OTHER / Accelerating voltage: 300 kV / Illumination mode: OTHER |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm |
Image recording | Electron dose: 70 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of real images: 5911 |
-Processing
Software | Name: PHENIX / Version: 1.19.1_4122: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.77 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 407119 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | B value: 95 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient | ||||||||||||||||||||||||
Atomic model building | PDB-ID: 7MYN Accession code: 7MYN / Source name: PDB / Type: experimental model | ||||||||||||||||||||||||
Refine LS restraints |
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