8tgd

STX-478, a Mutant-Selective, Allosteric Inhibitor bound to H1047R PI3Kalpha

Method: X-RAY DIFFRACTION Dmax: 195.2 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

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

Homo sapiens

UniProt P42336

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–1068 Mutation:H1047R Phosphatidylinositol 3-kinase regulatory subunit alpha × 1 (P27986) EDO 1,2-ETHANEDIOL × 10 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 × 1 ZWE N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.8;293 K;0.5 M NaCl, 0.1 M MES-NaOH pH 6.8, 5% w/v PEG 3350 Resolution 2.93 Å R-free 0.252
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 1–1068 Mutation:H1047R Phosphatidylinositol 3-kinase regulatory subunit alpha × 1 (P27986) EDO 1,2-ETHANEDIOL × 3 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 × 1 ZWE N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.8;293 K;0.5 M NaCl, 0.1 M MES-NaOH pH 6.8, 5% w/v PEG 3350 Resolution 2.93 Å R-free 0.252

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

134 other PDB entries and 144 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name PK3CA_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–1068; UniProt 1–1068 Author chain C; PDBConstruct 1–1068; UniProt 1–1068

Phosphatidylinositol 3-kinase regulatory subunit alpha

Homo sapiens

UniProt P27986

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 8–293 Not recorded Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform × 1 (P42336) EDO 1,2-ETHANEDIOL × 10 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 × 1 ZWE N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.8;293 K;0.5 M NaCl, 0.1 M MES-NaOH pH 6.8, 5% w/v PEG 3350 Resolution 2.93 Å R-free 0.252
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain D; UniProt 8–293 Not recorded Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform × 1 (P42336) EDO 1,2-ETHANEDIOL × 3 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 × 1 ZWE N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.8;293 K;0.5 M NaCl, 0.1 M MES-NaOH pH 6.8, 5% w/v PEG 3350 Resolution 2.93 Å R-free 0.252

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

103 other PDB entries and 115 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name P85A_HUMAN
Isoform P27986-3
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 8–293; UniProt 8–293 Author chain D; PDBConstruct 8–293; UniProt 8–293

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 8tgd

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8tgd
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8tgd
Deposition date deposition_date2023-07-12
Structure title titleSTX-478, a Mutant-Selective, Allosteric Inhibitor bound to H1047R PI3Kalpha
Keywords keywordsKinase, Inhibitor, TRANSFERASE, TRANSFERASE-TRANSFERSE INHIBITOR complex; TRANSFERASE/TRANSFERSE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier51.71
Radius of gyration Rg (electron density) rg_electron51.73
Forward intensity I(0) i01266770000.00
Molecular weight molecular_weight299200.0 kDa
Excluded volume excluded_volume375510 ų
Envelope volume envelope_volume527260 ų
Hydration-shell volume shell_volume85904 ų
Envelope diameter envelope_diameter210.4
Shell Rg shell_rg54.34
Envelope Rg envelope_rg51.03
Shape Rg shape_rg51.70
Total Rg total_rg51.91
Total atoms total_atoms41830
Residues n_residues2525
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax195.2
Rg (real space) rg_real51.94
Rg uncertainty (real space) rg_real_error2.69
I(0) (real space) i0_real1.2670e+09
I(0) uncertainty (real space) i0_real_error2.8980e+07
Rg (reciprocal space) rg_reciprocal51.51
I(0) (reciprocal space) i0_reciprocal1266000000.0000
Solution quality estimate total_estimate0.8265
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary52.0
Skewness Skewness skewness0.541
Kurtosis Kurtosis kurtosis-0.039
Angular range angular_range— – 0.1500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha172500000.0000
Real-space data points n_real_points31
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.615; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.978; Smooth: 0.919

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id8tgdA01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily150 — C2 domain
Domain ID domain_id8tgdA02
Class class1 — Mainly Alpha
Architecture architecture25 — Alpha Horseshoe
Topology topology40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily70 — Phosphatidylinositol 3-kinase, accessory domain (PIK)
Domain ID domain_id8tgdC01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily150 — C2 domain
Domain ID domain_id8tgdC02
Class class1 — Mainly Alpha
Architecture architecture25 — Alpha Horseshoe
Topology topology40 — Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat
Homologous superfamily homologous superfamily70 — Phosphatidylinositol 3-kinase, accessory domain (PIK)

8. Citations (1)

9. Files and Curves (10)