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- EMDB-34273: Cryo-EM structure of cancer-specific PI3Kalpha mutant E545K in co... -

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Entry
Database: EMDB / ID: EMD-34273
TitleCryo-EM structure of cancer-specific PI3Kalpha mutant E545K in complex with BYL-719
Map data
Sample
  • Complex: Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719
    • Protein or peptide: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
  • Ligand: (2S)-N~1~-{4-methyl-5-[2-(1,1,1-trifluoro-2-methylpropan-2-yl)pyridin-4-yl]-1,3-thiazol-2-yl}pyrrolidine-1,2-dicarboxamide
KeywordsPhosphoinositide 3-kinase (PI3K) / helical domain / mutation / cancers / STRUCTURAL PROTEIN
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 / autosome genomic imprinting / IRS-mediated signalling / cellular response to hydrostatic pressure / 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 / autosome genomic imprinting / IRS-mediated signalling / cellular response to hydrostatic pressure / 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 / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IB / vasculature development / Signaling by cytosolic FGFR1 fusion mutants / regulation of cellular respiration / anoikis / phosphatidylinositol 3-kinase complex, class IA / phosphatidylinositol 3-kinase complex / Nephrin family interactions / Costimulation by the CD28 family / relaxation of cardiac muscle / 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 / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / negative regulation of macroautophagy / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / PI-3K cascade:FGFR2 / response to dexamethasone / protein kinase activator activity / 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 / regulation of multicellular organism growth / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K Cascade / positive regulation of TOR signaling / endothelial cell migration / 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 / phagocytosis / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / energy homeostasis / positive regulation of lamellipodium assembly / Signaling by FGFR4 in disease / cardiac muscle contraction / 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 / RAC1 GTPase cycle / response to muscle stretch / Signaling by FLT3 fusion proteins / FLT3 Signaling / Signaling by FGFR1 in disease / Downstream signal transduction / phosphatidylinositol 3-kinase/protein kinase B signal transduction / 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 / Signaling by ERBB2 KD Mutants / epidermal growth factor receptor signaling pathway / Signaling by SCF-KIT / platelet activation / VEGFA-VEGFR2 Pathway / cellular response to insulin stimulus / glucose metabolic process / Constitutive Signaling by Aberrant PI3K in Cancer
Similarity search - Function
PI3Kalpha, catalytic domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / 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. / Phosphoinositide 3-kinase C2 ...PI3Kalpha, catalytic domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / 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. / Phosphoinositide 3-kinase C2 / Phosphoinositide 3-kinase, region postulated to contain C2 domain / C2 phosphatidylinositol 3-kinase-type domain / C2 phosphatidylinositol 3-kinase (PI3K)-type domain profile. / Phosphoinositide 3-kinase, accessory (PIK) domain superfamily / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / 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 / Armadillo-type fold / Ubiquitin-like domain superfamily / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.62 Å
AuthorsLiu X / Zhou Q / Hart JR / Xu Y / Yang S / Yang D / Vogt PK / Wang M-W
Funding support China, United States, 13 items
OrganizationGrant numberCountry
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)21704064 China
Other government2018ZX09735-001 China
Other government2018ZX09711002-002-005 China
Other government2021ZD0203400 China
Other government2018YFA0507000 China
Other governmentZDKJ2021028 China
Other privateNNCAS-2017-1-CC China
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
CitationJournal: 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
DepositionSep 11, 2022-
Header (metadata) releaseNov 23, 2022-
Map releaseNov 23, 2022-
UpdateJul 3, 2024-
Current statusJul 3, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_34273.png

Downloads & links

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Map

FileDownload / File: emd_34273.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.071 Å
Density
Contour LevelBy AUTHOR: 0.2
Minimum - Maximum-2.5719395 - 3.15737
Average (Standard dev.)-0.0003138734 (±0.043021493)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 274.176 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_34273_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Half map: #1

Fileemd_34273_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719

EntireName: Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719
Components
  • Complex: Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719
    • Protein or peptide: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
  • Ligand: (2S)-N~1~-{4-methyl-5-[2-(1,1,1-trifluoro-2-methylpropan-2-yl)pyridin-4-yl]-1,3-thiazol-2-yl}pyrrolidine-1,2-dicarboxamide

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Supramolecule #1: Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719

SupramoleculeName: Cryo-EM structure of PI3Kalpha mutant E545K in complex with BYL-719
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit ...

MacromoleculeName: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: phosphatidylinositol 3-kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 127.822641 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MSYYHHHHHH DYDIPTTENL YFQGAMGSMP PRPSSGELWG IHLMPPRILV ECLLPNGMIV TLECLREATL ITIKHELFKE ARKYPLHQL LQDESSYIFV SVTQEAEREE FFDETRRLCD LRLFQPFLKV IEPVGNREEK ILNREIGFAI GMPVCEFDMV K DPEVQDFR ...String:
MSYYHHHHHH DYDIPTTENL YFQGAMGSMP PRPSSGELWG IHLMPPRILV ECLLPNGMIV TLECLREATL ITIKHELFKE ARKYPLHQL LQDESSYIFV SVTQEAEREE FFDETRRLCD LRLFQPFLKV IEPVGNREEK ILNREIGFAI GMPVCEFDMV K DPEVQDFR RNILNVCKEA VDLRDLNSPH SRAMYVYPPN VESSPELPKH IYNKLDKGQI IVVIWVIVSP NNDKQKYTLK IN HDCVPEQ VIAEAIRKKT RSMLLSSEQL KLCVLEYQGK YILKVCGCDE YFLEKYPLSQ YKYIRSCIML GRMPNLMLMA KES LYSQLP MDCFTMPSYS RRISTATPYM NGETSTKSLW VINSALRIKI LCATYVNVNI RDIDKIYVRT GIYHGGEPLC DNVN TQRVP CSNPRWNEWL NYDIYIPDLP RAARLCLSIC SVKGRKGAKE EHCPLAWGNI NLFDYTDTLV SGKMALNLWP VPHGL EDLL NPIGVTGSNP NKETPCLELE FDWFSSVVKF PDMSVIEEHA NWSVSREAGF SYSHAGLSNR LARDNELREN DKEQLK AIS TRDPLSEITK QEKDFLWSHR HYCVTIPEIL PKLLLSVKWN SRDEVAQMYC LVKDWPPIKP EQAMELLDCN YPDPMVR GF AVRCLEKYLT DDKLSQYLIQ LVQVLKYEQY LDNLLVRFLL KKALTNQRIG HFFFWHLKSE MHNKTVSQRF GLLLESYC R ACGMYLKHLN RQVEAMEKLI NLTDILKQEK KDETQKVQMK FLVEQMRRPD FMDALQGFLS PLNPAHQLGN LRLEECRIM SSAKRPLWLN WENPDIMSEL LFQNNEIIFK NGDDLRQDML TLQIIRIMEN IWQNQGLDLR MLPYGCLSIG DCVGLIEVVR NSHTIMQIQ CKGGLKGALQ FNSHTLHQWL KDKNKGEIYD AAIDLFTRSC AGYCVATFIL GIGDRHNSNI MVKDDGQLFH I DFGHFLDH KKKKFGYKRE RVPFVLTQDF LIVISKGAQE CTKTREFERF QEMCYKAYLA IRQHANLFIN LFSMMLGSGM PE LQSFDDI AYIRKTLALD KTEQEALEYF MKQMNDAHHG GWTTKMDWIF HTIKQHALN

UniProtKB: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform

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Macromolecule #2: (2S)-N~1~-{4-methyl-5-[2-(1,1,1-trifluoro-2-methylpropan-2-yl)pyr...

MacromoleculeName: (2S)-N~1~-{4-methyl-5-[2-(1,1,1-trifluoro-2-methylpropan-2-yl)pyridin-4-yl]-1,3-thiazol-2-yl}pyrrolidine-1,2-dicarboxamide
type: ligand / ID: 2 / Number of copies: 1 / Formula: 1LT
Molecular weightTheoretical: 441.47 Da
Chemical component information

ChemComp-1LT:
(2S)-N~1~-{4-methyl-5-[2-(1,1,1-trifluoro-2-methylpropan-2-yl)pyridin-4-yl]-1,3-thiazol-2-yl}pyrrolidine-1,2-dicarboxamide / medication*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1.0 mg/mL
BufferpH: 7.6
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number real images: 5144 / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: OTHER
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.62 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 753253
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7myn


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 101.9 / Target criteria: Correlation coefficient
Output model

PDB-8gud:
Cryo-EM structure of cancer-specific PI3Kalpha mutant E545K in complex with BYL-719

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