+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-35543 | ||||||||||||||||||||||||||||||||||||
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Title | Cryo-EM structure of PI3Kalpha in complex with compound 16 | ||||||||||||||||||||||||||||||||||||
Map data | |||||||||||||||||||||||||||||||||||||
Sample |
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Keywords | Phosphoinositide 3-kinase / drug target / ligand / binding pocket / chemical scaffold / STRUCTURAL PROTEIN | ||||||||||||||||||||||||||||||||||||
Function / homology | Function and homology information perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / negative regulation of actin filament depolymerization / phosphatidylinositol kinase activity / response to L-leucine / regulation of actin filament organization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling ...perinuclear endoplasmic reticulum membrane / response to muscle inactivity / regulation of toll-like receptor 4 signaling pathway / negative regulation of actin filament depolymerization / phosphatidylinositol kinase activity / response to L-leucine / regulation of actin filament organization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling / positive regulation of focal adhesion disassembly / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase activator activity / autosome genomic imprinting / 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 / Activated NTRK3 signals through PI3K / negative regulation of fibroblast apoptotic process / cis-Golgi network / ErbB-3 class receptor binding / kinase activator activity / phosphatidylinositol 3-kinase complex, class IB / vasculature development / transmembrane receptor protein tyrosine kinase adaptor activity / RHOF GTPase cycle / regulation of cellular respiration / Signaling by cytosolic FGFR1 fusion mutants / positive regulation of endoplasmic reticulum unfolded protein response / RHOD GTPase cycle / cardiac muscle cell contraction / phosphatidylinositol 3-kinase complex, class IA / phosphatidylinositol 3-kinase complex / enzyme-substrate adaptor activity / Nephrin family interactions / anoikis / Signaling by LTK in cancer / Costimulation by the CD28 family / RND1 GTPase cycle / Signaling by LTK / 1-phosphatidylinositol-4-phosphate 3-kinase activity / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / relaxation of cardiac muscle / MET activates PI3K/AKT signaling / positive regulation of leukocyte migration / PI3K/AKT activation / RND2 GTPase cycle / phosphatidylinositol-4,5-bisphosphate 3-kinase / positive regulation of filopodium assembly / RND3 GTPase cycle / growth hormone receptor signaling pathway / vascular endothelial growth factor signaling pathway / negative regulation of stress fiber assembly / phosphatidylinositol 3-kinase / insulin binding / phosphatidylinositol-3-phosphate biosynthetic process / natural killer cell mediated cytotoxicity / 1-phosphatidylinositol-3-kinase activity / RHOV GTPase cycle / negative regulation of cell-matrix adhesion / Signaling by ALK / negative regulation of macroautophagy / RHOB GTPase cycle / GP1b-IX-V activation signalling / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / PI-3K cascade:FGFR2 / protein kinase activator activity / PI-3K cascade:FGFR4 / response to dexamethasone / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / intracellular glucose homeostasis / negative regulation of osteoclast differentiation / Synthesis of PIPs at the plasma membrane / phosphatidylinositol-mediated signaling / phosphatidylinositol phosphate biosynthetic process / CD28 dependent PI3K/Akt signaling / RHOU GTPase cycle / CDC42 GTPase cycle / PI3K events in ERBB2 signaling / negative regulation of anoikis / RET signaling / intercalated disc / Interleukin-3, Interleukin-5 and GM-CSF signaling / insulin receptor substrate binding / T cell differentiation / RHOG GTPase cycle / PI3K Cascade / regulation of multicellular organism growth / extrinsic apoptotic signaling pathway via death domain receptors / endothelial cell migration / positive regulation of TOR signaling / RHOA GTPase cycle Similarity search - Function | ||||||||||||||||||||||||||||||||||||
Biological species | Homo sapiens (human) | ||||||||||||||||||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.05 Å | ||||||||||||||||||||||||||||||||||||
Authors | Zhou Q / Liu X / Neri D / Li W / Favalli N / Bassi G / Yang S / Yang D / Vogt PK / Wang M-W | ||||||||||||||||||||||||||||||||||||
Funding support | China, United States, 11 items
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Citation | Journal: Proc Natl Acad Sci U S A / Year: 2023 Title: Structural insights into the interaction of three Y-shaped ligands with PI3Kα. Authors: Qingtong Zhou / Xiao Liu / Dario Neri / Wenxin Li / Nicholas Favalli / Gabriele Bassi / Su Yang / Dehua Yang / Peter K Vogt / Ming-Wei Wang / Abstract: Class IA phosphoinositide 3-kinase alpha (PI3Kα) is an important drug target because it is one of the most frequently mutated proteins in human cancers. However, small molecule inhibitors currently ...Class IA phosphoinositide 3-kinase alpha (PI3Kα) is an important drug target because it is one of the most frequently mutated proteins in human cancers. However, small molecule inhibitors currently on the market or under development have safety concerns due to a lack of selectivity. Therefore, other chemical scaffolds or unique mechanisms of catalytic kinase inhibition are needed. Here, we report the cryo-electron microscopy structures of wild-type PI3Kα, the dimer of p110α and p85α, in complex with three Y-shaped ligands [cpd16 (compound 16), cpd17 (compound 17), and cpd18 (compound 18)] of different affinities and no inhibitory effect on the kinase activity. Unlike ATP-competitive inhibitors, cpd17 adopts a Y-shaped conformation with one arm inserted into a binding pocket formed by R770 and W780 and the other arm lodged in the ATP-binding pocket at an angle that is different from that of the ATP phosphate tail. Such a special interaction induces a conformation of PI3Kα resembling that of the unliganded protein. These observations were confirmed with two isomers (cpd16 and cpd18). Further analysis of these Y-shaped ligands revealed the structural basis of differential binding affinities caused by stereo- or regiochemical modifications. Our results may offer a different direction toward the design of therapeutic agents against PI3Kα. | ||||||||||||||||||||||||||||||||||||
History |
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-Structure visualization
Supplemental images |
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-Downloads & links
-EMDB archive
Map data | emd_35543.map.gz | 59.7 MB | EMDB map data format | |
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Header (meta data) | emd-35543-v30.xml emd-35543.xml | 19.7 KB 19.7 KB | Display Display | EMDB header |
FSC (resolution estimation) | emd_35543_fsc.xml | 9.1 KB | Display | FSC data file |
Images | emd_35543.png | 59 KB | ||
Others | emd_35543_half_map_1.map.gz emd_35543_half_map_2.map.gz | 59.4 MB 59.4 MB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-35543 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-35543 | HTTPS FTP |
-Validation report
Summary document | emd_35543_validation.pdf.gz | 763 KB | Display | EMDB validaton report |
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Full document | emd_35543_full_validation.pdf.gz | 762.6 KB | Display | |
Data in XML | emd_35543_validation.xml.gz | 16.3 KB | Display | |
Data in CIF | emd_35543_validation.cif.gz | 21.4 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35543 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-35543 | HTTPS FTP |
-Related structure data
Related structure data | 8ilrMC 8ilsC 8ilvC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_35543.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.071 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_35543_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_35543_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Sample components
-Entire : Human PI3Kalpha in complex with compound 16
Entire | Name: Human PI3Kalpha in complex with compound 16 |
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Components |
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-Supramolecule #1: Human PI3Kalpha in complex with compound 16
Supramolecule | Name: Human PI3Kalpha in complex with compound 16 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 |
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Source (natural) | Organism: Homo sapiens (human) |
-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 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: N-[(2S)-1-(ethylamino)-1-oxidanylidene-3-[4-(2-quinoxalin-6-yleth...
Macromolecule | Name: N-[(2S)-1-(ethylamino)-1-oxidanylidene-3-[4-(2-quinoxalin-6-ylethynyl)phenyl]propan-2-yl]-2,3-dimethyl-quinoxaline-6-carboxamide type: ligand / ID: 3 / Number of copies: 1 / Formula: 7TZ |
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Molecular weight | Theoretical: 528.604 Da |
Chemical component information | ChemComp-7TZ: |
-Macromolecule #4: water
Macromolecule | Name: water / type: ligand / ID: 4 / Number of copies: 7 / 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 |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 70.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: OTHER |
Electron optics | Illumination 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 |