9IMW | pdb_00009imw

Crystal structure of N-terminal domain of human Hsp90

• PDB DOI: https://doi.org/10.2210/pdb9IMW/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-07-04 Released: 2025-07-09 
• Deposition Author(s): Huang, L.Q., Yu, F.
• Funding Organization(s): National Basic Research Program of China (973 Program)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.53 Å
• R-Value Free: 
  0.181 (Depositor), 0.185 (DCC) 
• R-Value Work: 
  0.163 (Depositor), 0.165 (DCC) 
• R-Value Observed: 
  0.164 (Depositor) 

Starting Model: experimental

Literature

Novel starting points for fragment-based drug design against human heat shock protein 90 identified using crystallographic fragment screening

Huang, L.Q., Feng, Y., Wang, Q.S., Wang, W.W., Zhu, Z.M., Li, Q.H., Zhou, H., Xu, Q., Li, M.J.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 25.66 kDa 
• Atom Count: 2,004 
• Modeled Residue Count: 209 
• Deposited Residue Count: 228 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Heat shock protein HSP 90-alpha	A	228	Homo sapiens	Mutation(s): 0  Gene Names: HSP90AA1, HSP90A, HSPC1, HSPCA EC: 3.6.4.10
UniProt & NIH Common Fund Data Resources
Find proteins for P07900 (Homo sapiens) Explore P07900  Go to UniProtKB:  P07900
PHAROS:  P07900 GTEx:  ENSG00000080824

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.53 Å
• R-Value Free:  0.181 (Depositor), 0.185 (DCC) 
• R-Value Work:  0.163 (Depositor), 0.165 (DCC) 
• R-Value Observed: 0.164 (Depositor) 

Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.849	α = 90
b = 89.309	β = 90
c = 99.998	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-09 
Deposition Author(s): Huang, L.Q., Yu, F.

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Funding Organization	Location	Grant Number
National Basic Research Program of China (973 Program)	China	2021YFC2301405

Revision History  

• Version 1.0: 2025-07-09
  Type: Initial release