Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 57934.46 
• Atom Count: 3526 
• Residue Count: 502 
• Unique protein chains: 1

4Z1F

Crystal structure of human Trap1 with PU-H71

• DOI: 10.2210/pdb4Z1F/pdb

• Classification: CHAPERONE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2015-03-27 Released: 2015-04-22 
• Deposition Author(s): Lee, C., Park, H.K., Ryu, J.H., Kang, B.H.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.703 Å
• R-Value Free: 0.280 
• R-Value Work: 0.222 

Literature

Development of a Mitochondria-Targeted Hsp90 Inhibitor Based on the Crystal Structures of Human TRAP1

Lee, C., Park, H.K., Jeong, H., Lim, J., Lee, A.J., Cheon, K.Y., Kim, C.S., Thomas, A.P., Bae, B., Kim, N.D., Kim, S.H., Suh, P.G., Ryu, J.H., Kang, B.H.

(2015) J.Am.Chem.Soc. 137: 4358-4367

• PubMed: 25785725 
• DOI: 10.1021/ja511893n
• Primary Citation of Related Structures:  
  4Z1I, 4Z1H, 4Z1G


• PubMed Abstract: 
  

The mitochondrial pool of Hsp90 and its mitochondrial paralogue, TRAP1, suppresses cell death and reprograms energy metabolism in cancer cells; therefore, Hsp90 and TRAP1 have been suggested as target proteins for anticancer drug development. Here, we report that the actual target protein in cancer cell mitochondria is TRAP1, and current Hsp90 inhibitors cannot effectively inactivate TRAP1 because of their insufficient accumulation in the mitochondria. To develop mitochondrial TRAP1 inhibitors, we determined the crystal structures of human TRAP1 complexed with Hsp90 inhibitors. The isopropyl amine of the Hsp90 inhibitor PU-H71 was replaced with the mitochondria-targeting moiety triphenylphosphonium to produce SMTIN-P01. SMTIN-P01 showed a different mode of action from the nontargeted PU-H71, as well as much improved cytotoxicity to cancer cells. In addition, we determined the structure of a TRAP1-adenylyl-imidodiphosphate (AMP-PNP) complex. On the basis of comparative analysis of TRAP1 structures, we propose a molecular mechanism of ATP hydrolysis that is crucial for chaperone function.

---

Organizational Affiliation: 

∥New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, 701-310, Korea.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Heat shock protein 75 kDa, mitochondrial	A	502	Homo sapiens	Mutation(s): 0  Gene Names: TRAP1 (HSP75)
Find proteins for Q12931 (Homo sapiens) Go to Gene View: TRAP1 Go to UniProtKB:  Q12931

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
H71	A	8-[(6-IODO-1,3-BENZODIOXOL-5-YL)THIO]-9-[3-(ISOPROPYLAMINO)PROPYL]-9H-PURIN-6-AMINE C18 H21 I N6 O2 S SUPVGFZUWFMATN-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
H71	IC50: 205 nM (100) BINDINGDB

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.703 Å
• R-Value Free: 0.280 
• R-Value Work: 0.222 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 69.223	α = 90.00
b = 69.223	β = 90.00
c = 252.522	γ = 90.00

Software Package:

Software Name	Purpose
PHENIX	phasing
HKL-2000	data processing
Coot	model building
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-03-27 
• Released Date: 2015-04-22 
• Deposition Author(s): Lee, C., Park, H.K., Ryu, J.H., Kang, B.H.

Revision History 

• Version 1.0: 2015-04-22
  Type: Initial release