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- PDB-5fi4: Discovery of imidazo[1,2-a]-pyridine inhibitors of pan-PI3 kinase... -

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Basic information

Entry
Database: PDB / ID: 5fi4
TitleDiscovery of imidazo[1,2-a]-pyridine inhibitors of pan-PI3 kinases that are efficacious in a mouse xenograft model
Components
  • Phosphatidylinositol 3-kinase regulatory subunit alpha
  • Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
KeywordsTRANSFERASE/TRANSFERASE INHIBITOR / Lipid kinase inhibitor / 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 / phosphatidylinositol kinase activity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / positive regulation of focal adhesion disassembly / response to butyrate / 1-phosphatidylinositol-3-kinase regulator activity ...perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / phosphatidylinositol kinase activity / negative regulation of actin filament depolymerization / regulation of actin filament organization / response to L-leucine / positive regulation of focal adhesion disassembly / response to butyrate / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / T follicular helper cell differentiation / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase regulatory subunit binding / myeloid leukocyte migration / regulation of cellular respiration / neurotrophin TRKA receptor binding / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / transmembrane receptor protein tyrosine kinase adaptor activity / ErbB-3 class receptor binding / phosphatidylinositol 3-kinase complex, class IB / positive regulation of protein localization to membrane / vasculature development / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / RHOD GTPase cycle / cardiac muscle cell contraction / 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 / relaxation of cardiac muscle / Signaling by LTK / MET activates PI3K/AKT signaling / PI3K/AKT activation / negative regulation of stress fiber assembly / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / RND1 GTPase cycle / positive regulation of filopodium assembly / phosphatidylinositol-4,5-bisphosphate 3-kinase / RND2 GTPase cycle / vascular endothelial growth factor signaling pathway / RND3 GTPase cycle / phosphatidylinositol 3-kinase / insulin binding / growth hormone receptor signaling pathway / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / RHOB GTPase cycle / RHOV GTPase cycle / PI-3K cascade:FGFR3 / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / GP1b-IX-V activation signalling / negative regulation of macroautophagy / natural killer cell mediated cytotoxicity / PI-3K cascade:FGFR2 / response to dexamethasone / 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 / energy homeostasis / RHOU GTPase cycle / CDC42 GTPase cycle / RET signaling / negative regulation of anoikis / PI3K events in ERBB2 signaling / insulin receptor substrate binding / Interleukin-3, Interleukin-5 and GM-CSF signaling / PI3K Cascade / T cell differentiation / intercalated disc / protein kinase activator activity / RHOG GTPase cycle / extrinsic apoptotic signaling pathway via death domain receptors / negative regulation of cell-matrix adhesion / regulation of multicellular organism growth / CD28 dependent PI3K/Akt signaling / RHOA GTPase cycle / positive regulation of TOR signaling
Similarity search - Function
Ubiquitin-like (UB roll) - #770 / Helix Hairpins - #1490 / 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 / Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 4 ...Ubiquitin-like (UB roll) - #770 / Helix Hairpins - #1490 / 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 / Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 4 / Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, domain 4 / Phosphatidylinositol 3-/4-kinase, catalytic domain / Phosphatidylinositol 3-kinase Catalytic Subunit; Chain A, Domain 5 / 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 / Src homology 3 domains / SH2 domain superfamily / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat / Ubiquitin-like (UB roll) / Helix Hairpins / Alpha Horseshoe / Armadillo-type fold / Ubiquitin-like domain superfamily / Roll / Protein kinase-like domain superfamily / Immunoglobulin-like / Sandwich / 2-Layer Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
Chem-5XV / 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 / Resolution: 2.5 Å
AuthorsElling, R.A. / Knapp, M.S. / Han, W. / Daniel, L.M. / Xy, Y. / Burger, M.T. / Ni, Z. / Smith, A. / Lan, J. / Williams, T. ...Elling, R.A. / Knapp, M.S. / Han, W. / Daniel, L.M. / Xy, Y. / Burger, M.T. / Ni, Z. / Smith, A. / Lan, J. / Williams, T. / Verhagen, J. / Huh, K. / Merritt, H. / Chan, J. / Kaufman, S. / Voliva, C.F. / Pecchi, S.
CitationJournal: Bioorg.Med.Chem.Lett. / Year: 2016
Title: Discovery of imidazo[1,2-a]-pyridine inhibitors of pan-PI3 kinases that are efficacious in a mouse xenograft model.
Authors: Han, W. / Menezes, D.L. / Xu, Y. / Knapp, M.S. / Elling, R. / Burger, M.T. / Ni, Z.J. / Smith, A. / Lan, J. / Williams, T.E. / Verhagen, J. / Huh, K. / Merritt, H. / Chan, J. / Kaufman, S. / ...Authors: Han, W. / Menezes, D.L. / Xu, Y. / Knapp, M.S. / Elling, R. / Burger, M.T. / Ni, Z.J. / Smith, A. / Lan, J. / Williams, T.E. / Verhagen, J. / Huh, K. / Merritt, H. / Chan, J. / Kaufman, S. / Voliva, C.F. / Pecchi, S.
History
DepositionDec 22, 2015Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 3, 2016Provider: repository / Type: Initial release
Revision 1.1Jul 20, 2016Group: Data collection
Revision 1.2Mar 6, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_oper_list
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_oper_list.symmetry_operation

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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
B: Phosphatidylinositol 3-kinase regulatory subunit alpha
hetero molecules


Theoretical massNumber of molelcules
Total (without water)164,5044
Polymers164,0312
Non-polymers4722
Water4,738263
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6700 Å2
ΔGint-17 kcal/mol
Surface area54010 Å2
MethodPISA
Unit cell
Length a, b, c (Å)105.200, 105.320, 134.390
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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


Mass: 125287.828 Da / Num. of mol.: 1 / Mutation: M232K L233K
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PIK3CA / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: P42336, phosphatidylinositol-4,5-bisphosphate 3-kinase, non-specific serine/threonine protein kinase
#2: Protein Phosphatidylinositol 3-kinase regulatory subunit alpha


Mass: 38743.484 Da / Num. of mol.: 1 / Fragment: UNP residues 2-317
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PIK3R1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P27986
#3: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H8O3
#4: Chemical ChemComp-5XV / ~{N}-[6-[5-azanyl-6-[(2~{S})-1,1,1-tris(fluoranyl)propan-2-yl]oxy-pyrazin-2-yl]imidazo[1,2-a]pyridin-2-yl]ethanamide


Mass: 380.325 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H15F3N6O2
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 263 / Source method: isolated from a natural source / Formula: H2O

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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: 2.27 Å3/Da / Density % sol: 45.8 %
Crystal growTemperature: 303.15 K / Method: vapor diffusion, hanging drop
Details: 12.5% PEG 3350, 125 mM KSCN Drops were 5uL protein: 3uL well solutions and streak seeded.

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 17-ID / Wavelength: 1 Å
DetectorType: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Jul 14, 2011
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.5→38.56 Å / Num. obs: 52363 / % possible obs: 100 % / Redundancy: 6.2 % / Biso Wilson estimate: 57.46 Å2 / Rmerge(I) obs: 0.061 / Net I/σ(I): 17.3
Reflection shellResolution: 2.5→2.64 Å / Redundancy: 6 % / Rmerge(I) obs: 0.277 / Mean I/σ(I) obs: 4.2 / % possible all: 100

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Processing

Software
NameVersionClassification
BUSTER2.11.5refinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
RefinementResolution: 2.5→38.56 Å / Cor.coef. Fo:Fc: 0.9368 / Cor.coef. Fo:Fc free: 0.9043 / SU R Cruickshank DPI: 0.487 / Cross valid method: THROUGHOUT / σ(F): 0 / SU R Blow DPI: 0.487 / SU Rfree Blow DPI: 0.27 / SU Rfree Cruickshank DPI: 0.273
RfactorNum. reflection% reflectionSelection details
Rfree0.2452 2669 5.1 %RANDOM
Rwork0.1938 ---
obs0.1964 52298 99.99 %-
Displacement parametersBiso mean: 52.92 Å2
Baniso -1Baniso -2Baniso -3
1-6.2862 Å20 Å20 Å2
2---5.8874 Å20 Å2
3----0.3988 Å2
Refinement stepCycle: LAST / Resolution: 2.5→38.56 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms10180 0 33 263 10476
Refine LS restraints
Refine-IDTypeDev idealNumberRestraint functionWeight
X-RAY DIFFRACTIONt_bond_d0.0110458HARMONIC2
X-RAY DIFFRACTIONt_angle_deg1.1114171HARMONIC2
X-RAY DIFFRACTIONt_dihedral_angle_d3704SINUSOIDAL2
X-RAY DIFFRACTIONt_incorr_chiral_ct
X-RAY DIFFRACTIONt_pseud_angle
X-RAY DIFFRACTIONt_trig_c_planes287HARMONIC2
X-RAY DIFFRACTIONt_gen_planes1487HARMONIC5
X-RAY DIFFRACTIONt_it10458HARMONIC20
X-RAY DIFFRACTIONt_nbd
X-RAY DIFFRACTIONt_omega_torsion2.78
X-RAY DIFFRACTIONt_other_torsion18.56
X-RAY DIFFRACTIONt_improper_torsion
X-RAY DIFFRACTIONt_chiral_improper_torsion1348SEMIHARMONIC5
X-RAY DIFFRACTIONt_sum_occupancies
X-RAY DIFFRACTIONt_utility_distance
X-RAY DIFFRACTIONt_utility_angle
X-RAY DIFFRACTIONt_utility_torsion
X-RAY DIFFRACTIONt_ideal_dist_contact11930SEMIHARMONIC4
LS refinement shellResolution: 2.5→2.56 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.2621 215 5.63 %
Rwork0.2203 3606 -
all0.2227 3821 -
obs--99.99 %
Refinement TLS params.

L11: 0 °2 / L12: 0 °2 / L13: 0 °2 / L22: 0 °2 / L23: 0 °2 / L33: 0 °2 / S11: 0 Å ° / S12: 0 Å ° / S13: 0 Å ° / S21: 0 Å ° / S22: 0 Å ° / S23: 0 Å ° / S31: 0 Å ° / S32: 0 Å ° / S33: 0 Å ° / T11: 0 Å2 / T12: 0 Å2 / T13: 0 Å2 / T22: 0 Å2 / T23: 0 Å2 / T33: 0 Å2 / Method: refined / Refine-ID: X-RAY DIFFRACTION

IDOrigin x (Å)Origin y (Å)Origin z (Å)
1-0.6972-16.9596-6.3012
210.2934-11.908614.9505
Refinement TLS group
IDRefine-IDRefine TLS-IDSelection details
1X-RAY DIFFRACTION1{ A|* }
2X-RAY DIFFRACTION2{ B|* }

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