SMTL ID : 8tgd.2 (1 other biounit)

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

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 2.93 Å

Oligo State

hetero-1-1-mer

Ligands

3 x EDO: 1,2-ETHANEDIOL(Non-functional Binders)

EDO.1: 6 residues within 4Å: Chain A: E.784, N.785, P.786, D.787, S.790, Q.795 1 PLIP interactions: 1 interactions with chain A Hydrogen bonds: A:Q.795 EDO.2: 3 residues within 4Å: Chain A: E.263, K.264, Y.265 1 PLIP interactions: 1 interactions with chain A Hydrogen bonds: A:K.264 EDO.3: 6 residues within 4Å: Chain A: E.620, L.623, T.624, F.652, K.655, K.656 2 PLIP interactions: 2 interactions with chain A Hydrogen bonds: A:K.656 Water bridges: A:D.625

1 x 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(Non-covalent)

X3N.4: 21 residues within 4Å: Chain A: R.770, M.772, S.774, P.778, W.780, I.800, K.802, D.810, Y.836, I.848, E.849, V.850, V.851, S.854, H.855, T.856, Q.859, M.922, F.930, I.932, D.933 10 PLIP interactions: 10 interactions with chain A Hydrophobic interactions: A:W.780, A:W.780, A:I.800 Hydrogen bonds: A:D.810, A:Y.836, A:V.851, A:S.854, A:Q.859, A:Q.859, A:D.933

1 x ZWE: N-(2-aminopyrimidin-5-yl)-N'-[(1R)-1-(5,7-difluoro-3-methyl-1-benzofuran-2-yl)-2,2,2-trifluoroethyl]urea(Non-covalent)

ZWE.5: 19 residues within 4Å: Chain A: Q.809, L.812, T.813, L.911, G.912, F.937, L.938, K.941, R.949, E.950, V.952, F.1002, M.1010, E.1012, L.1013, D.1018, I.1019, Y.1021, I.1022 10 PLIP interactions: 10 interactions with chain A Hydrophobic interactions: A:L.938, A:L.1013, A:L.1013 Hydrogen bonds: A:L.911, A:L.911, A:K.941, A:E.950 Salt bridges: A:E.950 pi-Stacking: A:Y.1021 pi-Cation interactions: A:Y.1021

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Buckbinder, L. et al., STX-478, a Mutant-Selective, Allosteric PI3K alpha Inhibitor Spares Metabolic Dysfunction and Improves Therapeutic Response in PI3K alpha-Mutant Xenografts. Cancer Discov (2023)

Release Date

2023-09-06

Peptides

Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform: A
Phosphatidylinositol 3-kinase regulatory subunit alpha: B

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
C

B
D

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

Phosphatidylinositol 3-kinase regulatory subunit alpha

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