9LWR | pdb_00009lwr

Cryo-EM structure of PI3Kalpha H1047R in complex with compound UCL-TRO-1938

• PDB DOI: https://doi.org/10.2210/pdb9LWR/pdb
• EM Map EMD-63457: EMDB EMDataResource

• Classification: CYTOSOLIC PROTEIN
• Organism(s): Homo sapiens
• Expression System: Trichoplusia ni
• Mutation(s): Yes 


• Deposited: 2025-02-16 Released: 2025-10-01 
• Deposition Author(s): Liu, X., Zhou, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC), National Science Foundation (NSF, China), Other government

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Molecular mechanisms of PI3K alpha activation by small-molecule activator 1938 and cancer-specific mutation H1047R.

Liu, X., Zhou, Q., Chen, Y., Han, W., Li, J., Mai, Y., Wang, M.W.

(2025) Cell Discov 11: 77-77

• PubMed: 40968123 
• DOI: https://doi.org/10.1038/s41421-025-00833-w
• Primary Citation of Related Structures:  
  9LWQ, 9LWR, 9LWS

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Organizational Affiliation: 
• Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
Research Center for Medicinal Structural Biology, National Research Center for Translational Medicine at Shanghai, State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Research Center for Deepsea Bioresources, Sanya, Hainan, China.
Department of Pharmacology, School of Basic Medical Sciences, Fudan University, Shanghai, China. [e-mail].
Research Center for Medicinal Structural Biology, National Research Center for Translational Medicine at Shanghai, State Key Laboratory of Medical Genomics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. [e-mail].
Research Center for Deepsea Bioresources, Sanya, Hainan, China. [e-mail].
Engineering Research Center of Tropical Medicine Innovation and Transformation of Ministry of Education, School of Pharmacy, Hainan Medical University, Haikou, China. [e-mail].
Department of Chemistry, School of Science, The University of Tokyo, Tokyo, Japan. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 211.46 kDa 
• Atom Count: 10,398 
• Modeled Residue Count: 1,261 
• Deposited Residue Count: 1,819 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform	A	1,096	Homo sapiens	Mutation(s): 1  Gene Names: PIK3CA EC: 2.7.1.137 (PDB Primary Data), 2.7.1.153 (PDB Primary Data), 2.7.11.1 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P42336 (Homo sapiens) Explore P42336  Go to UniProtKB:  P42336
PHAROS:  P42336 GTEx:  ENSG00000121879

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol 3-kinase regulatory subunit alpha	B	723	Homo sapiens	Mutation(s): 0  Gene Names: PIK3R1, GRB1
UniProt & NIH Common Fund Data Resources
Find proteins for P27986 (Homo sapiens) Explore P27986  Go to UniProtKB:  P27986
PHAROS:  P27986 GTEx:  ENSG00000145675

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.30 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-10-01 
Deposition Author(s): Liu, X., Zhou, Q.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	82273961
National Natural Science Foundation of China (NSFC)	China	82073904
National Science Foundation (NSF, China)	China	81872915
Other government		2021ZD0203400
Other government		ZDKJ2021028

Revision History  

• Version 1.0: 2025-10-01
  Type: Initial release