+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-24081 | ||||||||||||||||||||||||||||||||||||||||||
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Title | Cryo-EM Structure of p110alpha in complex with p85alpha | ||||||||||||||||||||||||||||||||||||||||||
Map data | Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Full map | ||||||||||||||||||||||||||||||||||||||||||
Sample |
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Keywords | phosphoinositide 3-kinase (PI3K) / activation / inhibition / activity-dependent conformational changes / TRANSFERASE | ||||||||||||||||||||||||||||||||||||||||||
Function / homology | Function and homology information perinuclear endoplasmic reticulum membrane / response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of toll-like receptor 4 signaling pathway / response to L-leucine / phosphatidylinositol kinase activity / regulation of actin filament organization / phosphatidylinositol 3-kinase regulator activity / response to butyrate / positive regulation of focal adhesion disassembly ...perinuclear endoplasmic reticulum membrane / response to muscle inactivity / negative regulation of actin filament depolymerization / regulation of toll-like receptor 4 signaling pathway / response to L-leucine / phosphatidylinositol kinase activity / regulation of actin filament organization / phosphatidylinositol 3-kinase regulator activity / response to butyrate / positive regulation of focal adhesion disassembly / autosome genomic imprinting / IRS-mediated signalling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / PI3K events in ERBB4 signaling / myeloid leukocyte migration / 1-phosphatidylinositol-3-kinase regulator activity / phosphatidylinositol 3-kinase regulatory subunit binding / neurotrophin TRKA receptor binding / Activated NTRK2 signals through PI3K / positive regulation of protein localization to membrane / cis-Golgi network / Activated NTRK3 signals through PI3K / ErbB-3 class receptor binding / negative regulation of fibroblast apoptotic process / RHOF GTPase cycle / kinase activator activity / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IB / vasculature development / transmembrane receptor protein tyrosine kinase adaptor activity / RHOD GTPase cycle / Signaling by cytosolic FGFR1 fusion mutants / regulation of cellular respiration / positive regulation of endoplasmic reticulum unfolded protein response / enzyme-substrate adaptor activity / phosphatidylinositol 3-kinase complex, class IA / anoikis / phosphatidylinositol 3-kinase complex / Nephrin family interactions / RND1 GTPase cycle / Costimulation by the CD28 family / relaxation of cardiac muscle / 1-phosphatidylinositol-4-phosphate 3-kinase activity / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / RND2 GTPase cycle / MET activates PI3K/AKT signaling / PI3K/AKT activation / RND3 GTPase cycle / positive regulation of leukocyte migration / positive regulation of filopodium assembly / phosphatidylinositol-4,5-bisphosphate 3-kinase / vascular endothelial growth factor signaling pathway / negative regulation of stress fiber assembly / phosphatidylinositol 3-kinase / growth hormone receptor signaling pathway / insulin binding / phosphatidylinositol-3-phosphate biosynthetic process / RHOV GTPase cycle / negative regulation of macroautophagy / 1-phosphatidylinositol-3-kinase activity / RHOB GTPase cycle / negative regulation of cell-matrix adhesion / Signaling by ALK / GP1b-IX-V activation signalling / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / protein kinase activator activity / response to dexamethasone / PI-3K cascade:FGFR2 / RHOJ GTPase cycle / PI-3K cascade:FGFR4 / RHOC GTPase cycle / PI-3K cascade:FGFR1 / negative regulation of osteoclast differentiation / intracellular glucose homeostasis / phosphatidylinositol-mediated signaling / phosphatidylinositol phosphate biosynthetic process / CD28 dependent PI3K/Akt signaling / Synthesis of PIPs at the plasma membrane / CDC42 GTPase cycle / RHOU GTPase cycle / PI3K events in ERBB2 signaling / negative regulation of anoikis / RHOG GTPase cycle / intercalated disc / T cell differentiation / RET signaling / regulation of multicellular organism growth / extrinsic apoptotic signaling pathway via death domain receptors / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K Cascade / RHOA GTPase cycle / positive regulation of TOR signaling / endothelial cell migration / RAC2 GTPase cycle / RAC3 GTPase cycle / Role of phospholipids in phagocytosis Similarity search - Function | ||||||||||||||||||||||||||||||||||||||||||
Biological species | Homo sapiens (human) | ||||||||||||||||||||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.79 Å | ||||||||||||||||||||||||||||||||||||||||||
Authors | Liu X / Yang S | ||||||||||||||||||||||||||||||||||||||||||
Funding support | United States, China, 13 items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2021 Title: Cryo-EM structures of PI3Kα reveal conformational changes during inhibition and activation. Authors: Xiao Liu / Su Yang / Jonathan R Hart / Yingna Xu / Xinyu Zou / Huibing Zhang / Qingtong Zhou / Tian Xia / Yan Zhang / Dehua Yang / Ming-Wei Wang / Peter K Vogt / Abstract: Phosphoinositide 3-kinases (PI3Ks) are lipid kinases essential for growth and metabolism. Their aberrant activation is associated with many types of cancers. Here we used single-particle cryoelectron ...Phosphoinositide 3-kinases (PI3Ks) are lipid kinases essential for growth and metabolism. Their aberrant activation is associated with many types of cancers. Here we used single-particle cryoelectron microscopy (cryo-EM) to determine three distinct conformations of full-length PI3Kα (p110α-p85α): the unliganded heterodimer PI3Kα, PI3Kα bound to the p110α-specific inhibitor BYL-719, and PI3Kα exposed to an activating phosphopeptide. The cryo-EM structures of unbound and of BYL-719-bound PI3Kα are in general accord with published crystal structures. Local deviations are presented and discussed. BYL-719 stabilizes the structure of PI3Kα, but three regions of low-resolution extra density remain and are provisionally assigned to the cSH2, BH, and SH3 domains of p85. One of the extra density regions is in contact with the kinase domain blocking access to the catalytic site. This conformational change indicates that the effects of BYL-719 on PI3Kα activity extend beyond competition with adenosine triphosphate (ATP). In unliganded PI3Kα, the DFG motif occurs in the "in" and "out" positions. In BYL-719-bound PI3Kα, only the DFG-in position, corresponding to the active conformation of the kinase, was observed. The phosphopeptide-bound structure of PI3Kα is composed of a stable core resolved at 3.8 Å. It contains all p110α domains except the adaptor-binding domain (ABD). The p85α domains, linked to the core through the ABD, are no longer resolved, implying that the phosphopeptide activates PI3Kα by fully releasing the niSH2 domain from binding to p110α. The structures presented here show the basal form of the full-length PI3Kα dimer and document conformational changes related to the activated and inhibited states. | ||||||||||||||||||||||||||||||||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_24081.map.gz | 5.4 MB | EMDB map data format | |
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Header (meta data) | emd-24081-v30.xml emd-24081.xml | 22.7 KB 22.7 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_24081_fsc.xml | 570.7 KB | Display | FSC data file |
Images | emd_24081.png | 40 KB | ||
Masks | emd_24081_msk_1.map | 5.8 MB | Mask map | |
Filedesc metadata | emd-24081.cif.gz | 7.6 KB | ||
Others | emd_24081_half_map_1.map.gz emd_24081_half_map_2.map.gz | 5.4 MB 5.4 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-24081 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-24081 | HTTPS FTP |
-Related structure data
Related structure data | 7mynMC 7myoC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_24081.map.gz / Format: CCP4 / Size: 5.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Full map | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.045 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Mask #1
File | emd_24081_msk_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Half Map 1
File | emd_24081_half_map_1.map | ||||||||||||
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Annotation | Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Half Map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Half Map 2
File | emd_24081_half_map_2.map | ||||||||||||
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Annotation | Structure of human PI 3-kinase PIK3CA PIK3R1 heterodimer Half Map 2 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Sample components
-Entire : Heterodimer of PIK3CA with PIK3R1
Entire | Name: Heterodimer of PIK3CA with PIK3R1 |
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Components |
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-Supramolecule #1: Heterodimer of PIK3CA with PIK3R1
Supramolecule | Name: Heterodimer of PIK3CA with PIK3R1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: Homo sapiens (human) / Location in cell: Membrane associated |
Molecular weight | Theoretical: 200 KDa |
-Macromolecule #1: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit ...
Macromolecule | Name: 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-4,5-bisphosphate 3-kinase |
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Source (natural) | Organism: Homo sapiens (human) |
Molecular weight | Theoretical: 127.822578 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: 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 TRDPLSEITE 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 |
-Macromolecule #2: Phosphatidylinositol 3-kinase regulatory subunit alpha
Macromolecule | Name: Phosphatidylinositol 3-kinase regulatory subunit alpha type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: Homo sapiens (human) |
Molecular weight | Theoretical: 83.623203 KDa |
Recombinant expression | Organism: Trichoplusia ni (cabbage looper) |
Sequence | String: MAEGYQYRAL YDYKKEREED IDLHLGDILT VNKGSLVALG FSDGQEARPE EIGWLNGYNE TTGERGDFPG TYVEYIGRKK ISPPTPKPR PPRPLPVAPG SSKTEADVEQ QALTLPDLAE QFAPPDIAPP LLIKLVEAIE KKGLECSTLY RTQSSSNLAE L RQLLDCDT ...String: MAEGYQYRAL YDYKKEREED IDLHLGDILT VNKGSLVALG FSDGQEARPE EIGWLNGYNE TTGERGDFPG TYVEYIGRKK ISPPTPKPR PPRPLPVAPG SSKTEADVEQ QALTLPDLAE QFAPPDIAPP LLIKLVEAIE KKGLECSTLY RTQSSSNLAE L RQLLDCDT PSVDLEMIDV HVLADAFKRY LLDLPNPVIP AAVYSEMISL APEVQSSEEY IQLLKKLIRS PSIPHQYWLT LQ YLLKHFF KLSQTSSKNL LNARVLSEIF SPMLFRFSAA SSDNTENLIK VIEILISTEW NERQPAPALP PKPPKPTTVA NNG MNNNMS LQDAEWYWGD ISREEVNEKL RDTADGTFLV RDASTKMHGD YTLTLRKGGN NKLIKIFHRD GKYGFSDPLT FSSV VELIN HYRNESLAQY NPKLDVKLLY PVSKYQQDQV VKEDNIEAVG KKLHEYNTQF QEKSREYDRL YEEYTRTSQE IQMKR TAIE AFNETIKIFE EQCQTQERYS KEYIEKFKRE GNEKEIQRIM HNYDKLKSRI SEIIDSRRRL EEDLKKQAAE YREIDK RMN SIKPDLIQLR KTRDQYLMWL TQKGVRQKKL NEWLGNENTE DQYSLVEDDE DLPHHDEKTW NVGSSNRNKA ENLLRGK RD GTFLVRESSK QGCYACSVVV DGEVKHCVIN KTATGYGFAE PYNLYSSLKE LVLHYQHTSL VQHNDSLNVT LAYPVYAQ Q RR UniProtKB: Phosphatidylinositol 3-kinase regulatory subunit alpha |
-Macromolecule #3: water
Macromolecule | Name: water / type: ligand / ID: 3 / Number of copies: 8 / Formula: HOH |
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Molecular weight | Theoretical: 18.015 Da |
Chemical component information | ChemComp-HOH: |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 1.0 mg/mL |
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Buffer | pH: 7.6 |
Grid | Model: Quantifoil R1.2/1.3 / Material: GRAPHENE OXIDE / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE |
Vitrification | Cryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: OTHER |
Electron optics | Calibrated defocus max: -2.5 µm / Calibrated defocus min: -1.5 µm / Calibrated magnification: 46685 / Illumination mode: OTHER / Imaging mode: BRIGHT FIELDBright-field microscopy |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number real images: 4023 / Average electron dose: 70.0 e/Å2 |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
-Atomic model buiding 1
Initial model |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT / Overall B value: 98.68 / Target criteria: Correlation coefficient | ||||||||||
Output model | PDB-7myn: |