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- PDB-8tdu: STX-478, a Mutant-Selective, Allosteric Inhibitor bound to PI3Kalpha -

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Basic information

Entry
Database: PDB / ID: 8tdu
TitleSTX-478, a Mutant-Selective, Allosteric Inhibitor bound to PI3Kalpha
Components
  • Phosphatidylinositol 3-kinase regulatory subunit alpha
  • Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
KeywordsTRANSFERASE/TRANSFERASE INHIBITOR / Kinase / Inhibitor / TRANSFERASE / TRANSFERASE-TRANSFERASE INHIBITOR complex
Function / homology
Function and homology information


perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / 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 / positive regulation of focal adhesion disassembly ...perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / 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 / positive regulation of focal adhesion disassembly / IRS-mediated signalling / phosphatidylinositol 3-kinase activator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / interleukin-18-mediated signaling pathway / myeloid leukocyte migration / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / T follicular helper cell differentiation / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase regulatory subunit binding / regulation of cellular respiration / neurotrophin TRKA receptor binding / positive regulation of protein localization to membrane / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / ErbB-3 class receptor binding / transmembrane receptor protein tyrosine kinase adaptor activity / phosphatidylinositol 3-kinase complex, class IB / vasculature development / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / cardiac muscle cell contraction / RHOD GTPase cycle / RHOF GTPase cycle / phosphatidylinositol 3-kinase complex, class IA / kinase activator activity / Nephrin family interactions / anoikis / Signaling by LTK in cancer / phosphatidylinositol-3-phosphate biosynthetic process / positive regulation of leukocyte migration / Signaling by LTK / MET activates PI3K/AKT signaling / PI3K/AKT activation / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / negative regulation of stress fiber assembly / RND1 GTPase cycle / phosphatidylinositol-4,5-bisphosphate 3-kinase / positive regulation of filopodium assembly / RND2 GTPase cycle / phosphatidylinositol 3-kinase / vascular endothelial growth factor signaling pathway / RND3 GTPase cycle / relaxation of cardiac muscle / insulin binding / growth hormone receptor signaling pathway / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / RHOV GTPase cycle / PI-3K cascade:FGFR3 / RHOB GTPase cycle / natural killer cell mediated cytotoxicity / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / negative regulation of macroautophagy / GP1b-IX-V activation signalling / PI-3K cascade:FGFR2 / phosphatidylinositol-mediated signaling / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / intracellular glucose homeostasis / phosphatidylinositol phosphate biosynthetic process / negative regulation of osteoclast differentiation / Synthesis of PIPs at the plasma membrane / response to dexamethasone / RHOU GTPase cycle / CDC42 GTPase cycle / negative regulation of anoikis / RET signaling / PI3K events in ERBB2 signaling / protein kinase activator activity / insulin receptor substrate binding / T cell differentiation / Interleukin-3, Interleukin-5 and GM-CSF signaling / extrinsic apoptotic signaling pathway via death domain receptors / PI3K Cascade / RHOG GTPase cycle / regulation of multicellular organism growth / intercalated disc / negative regulation of cell-matrix adhesion / CD28 dependent PI3K/Akt signaling / RHOA GTPase cycle / positive regulation of TOR signaling / RAC2 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 / Phosphatidylinositol 3-kinase, accessory domain (PIK) ...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 / Phosphatidylinositol 3-kinase, accessory domain (PIK) / 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. / C2 domain / 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 / SH2 domain superfamily / Src homology 3 domains / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat / Alpha Horseshoe / Armadillo-type fold / Ubiquitin-like domain superfamily / Protein kinase-like domain superfamily / Immunoglobulin-like / Sandwich / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
Chem-X3N / Chem-ZWE / Phosphatidylinositol 3-kinase regulatory subunit alpha / Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.11 Å
AuthorsHilbert, B.J. / Brooijmans, N. / Buckbinder, L. / St.Jean Jr., D.J.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: Cancer Discov / Year: 2023
Title: STX-478, a Mutant-Selective, Allosteric PI3K alpha Inhibitor Spares Metabolic Dysfunction and Improves Therapeutic Response in PI3K alpha-Mutant Xenografts.
Authors: Buckbinder, L. / St Jean Jr., D.J. / Tieu, T. / Ladd, B. / Hilbert, B. / Wang, W. / Alltucker, J.T. / Manimala, S. / Kryukov, G.V. / Brooijmans, N. / Dowdell, G. / Jonsson, P. / Huff, M. / ...Authors: Buckbinder, L. / St Jean Jr., D.J. / Tieu, T. / Ladd, B. / Hilbert, B. / Wang, W. / Alltucker, J.T. / Manimala, S. / Kryukov, G.V. / Brooijmans, N. / Dowdell, G. / Jonsson, P. / Huff, M. / Guzman-Perez, A. / Jackson, E.L. / Goncalves, M.D. / Stuart, D.D.
History
DepositionJul 5, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 6, 2023Provider: repository / Type: Initial release
Revision 1.1Nov 8, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.title / _citation_author.identifier_ORCID / _citation_author.name

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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
C: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
D: Phosphatidylinositol 3-kinase regulatory subunit alpha
B: Phosphatidylinositol 3-kinase regulatory subunit alpha
hetero molecules


Theoretical massNumber of molelcules
Total (without water)320,9118
Polymers319,2944
Non-polymers1,6174
Water81145
1
A: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
B: Phosphatidylinositol 3-kinase regulatory subunit alpha
hetero molecules


Theoretical massNumber of molelcules
Total (without water)160,4554
Polymers159,6472
Non-polymers8092
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area5540 Å2
ΔGint-21 kcal/mol
Surface area58270 Å2
MethodPISA
2
C: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
D: Phosphatidylinositol 3-kinase regulatory subunit alpha
hetero molecules


Theoretical massNumber of molelcules
Total (without water)160,4554
Polymers159,6472
Non-polymers8092
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area5690 Å2
ΔGint-19 kcal/mol
Surface area57690 Å2
MethodPISA
Unit cell
Length a, b, c (Å)86.340, 124.720, 165.840
Angle α, β, γ (deg.)90.00, 92.80, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform / PI3-kinase subunit alpha / PI3K-alpha / PI3Kalpha / PtdIns-3-kinase subunit alpha / ...PI3-kinase subunit alpha / PI3K-alpha / PI3Kalpha / PtdIns-3-kinase subunit alpha / Phosphatidylinositol 4 / 5-bisphosphate 3-kinase 110 kDa catalytic subunit alpha / PtdIns-3-kinase subunit p110-alpha / p110alpha / Phosphoinositide 3-kinase alpha / Phosphoinositide-3-kinase catalytic alpha polypeptide / Serine/threonine protein kinase PIK3CA


Mass: 124445.000 Da / Num. of mol.: 2
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
#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: 35201.758 Da / Num. of mol.: 2
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
#3: Chemical ChemComp-X3N / N~2~-{(4S,11aP)-2-[(4S)-4-(difluoromethyl)-2-oxo-1,3-oxazolidin-3-yl]-5,6-dihydroimidazo[1,2-d][1,4]benzoxazepin-9-yl}-L-alaninamide


Mass: 407.371 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C18H19F2N5O4 / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-ZWE / N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea


Mass: 401.291 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C16H12F5N5O2 / Feature type: SUBJECT OF INVESTIGATION
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 45 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.79 Å3/Da / Density % sol: 55.96 %
Crystal growTemperature: 298 K / Method: vapor diffusion / Details: 0.1 M MES pH 6.8, 500mM NaCl, 8% w/v PEG 3350

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: SPring-8 / Beamline: BL45XU / Wavelength: 1 Å
DetectorType: RIGAKU JUPITER 210 / Detector: CCD / Date: Jul 15, 2022
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 3.11→48.77 Å / Num. obs: 63223 / % possible obs: 100 % / Redundancy: 6.9 % / CC1/2: 0.999 / Rmerge(I) obs: 0.088 / Rpim(I) all: 0.036 / Rrim(I) all: 0.095 / Χ2: 1 / Net I/σ(I): 14.4
Reflection shellResolution: 3.11→3.19 Å / % possible obs: 99.9 % / Redundancy: 7.1 % / Rmerge(I) obs: 0.841 / Num. measured all: 31345 / Num. unique obs: 4440 / CC1/2: 0.786 / Rpim(I) all: 0.34 / Rrim(I) all: 0.908 / Χ2: 0.91 / Net I/σ(I) obs: 2.3

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Processing

Software
NameVersionClassification
REFMAC5.8.0405refinement
Aimlessdata scaling
REFMACphasing
XDSdata reduction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 3.11→48.77 Å / Cor.coef. Fo:Fc: 0.946 / Cor.coef. Fo:Fc free: 0.913 / SU B: 22.969 / SU ML: 0.396 / Cross valid method: THROUGHOUT / ESU R Free: 0.495 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.26653 3067 4.9 %RANDOM
Rwork0.20812 ---
obs0.21098 60150 99.95 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 106.05 Å2
Baniso -1Baniso -2Baniso -3
1-4.54 Å2-0 Å20.33 Å2
2---1.95 Å2-0 Å2
3----2.62 Å2
Refinement stepCycle: 1 / Resolution: 3.11→48.77 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms20529 0 114 45 20688
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0030.01221109
X-RAY DIFFRACTIONr_bond_other_d0.0020.01620167
X-RAY DIFFRACTIONr_angle_refined_deg0.971.65928490
X-RAY DIFFRACTIONr_angle_other_deg0.3451.57846497
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.65452470
X-RAY DIFFRACTIONr_dihedral_angle_2_deg5.4225148
X-RAY DIFFRACTIONr_dihedral_angle_3_deg15.963103972
X-RAY DIFFRACTIONr_dihedral_angle_4_deg
X-RAY DIFFRACTIONr_chiral_restr0.0480.23071
X-RAY DIFFRACTIONr_gen_planes_refined0.0040.0224370
X-RAY DIFFRACTIONr_gen_planes_other0.0010.024926
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it5.88310.4899931
X-RAY DIFFRACTIONr_mcbond_other5.87910.4899931
X-RAY DIFFRACTIONr_mcangle_it9.36618.84512384
X-RAY DIFFRACTIONr_mcangle_other9.36718.84512385
X-RAY DIFFRACTIONr_scbond_it5.52810.92211178
X-RAY DIFFRACTIONr_scbond_other5.52710.92311179
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other9.24719.94216107
X-RAY DIFFRACTIONr_long_range_B_refined13.206100.4223831
X-RAY DIFFRACTIONr_long_range_B_other13.206100.4323831
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 3.11→3.19 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.376 228 -
Rwork0.313 4413 -
obs--99.94 %

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