7EEK | pdb_00007eek

Structure of Human serum albumin-Au compound complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 
    0.300 (DCC) 
  • R-Value Work: 
    0.238 (Depositor), 0.240 (DCC) 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Developing a Novel Anticancer Gold(III) Agent to Integrate Chemotherapy and Immunotherapy.

Zhang, J.Jiang, M.Li, S.Zhang, Z.Sun, H.Yang, F.Liang, H.

(2021) J Med Chem 64: 6777-6791

  • DOI: https://doi.org/10.1021/acs.jmedchem.1c00050
  • Primary Citation of Related Structures:  
    7EEK

  • PubMed Abstract: 

    To effectively treat gastric cancer, we innovatively attempted to develop a metal agent to integrate immunotherapy and chemotherapy by dual targeting the cellular components in the tumor microenvironment (TME) based on the specific residue of human serum albumin (HSA) nanoparticles (NPs). We synthesized a series of Au(III) α-N-heterocyclic thiosemicarbazone compounds and obtained a Au agent ( 5b ) with remarkable cytotoxicity to gastric cancer cells; moreover, we successfully constructed a novel HSA-5b complex NP delivery system. Importantly, the in vivo results showed that 5b / HSA-5b NPs effectively inhibited gastric tumor growth and HSA-5b NPs enhanced the therapeutic efficiency, bioavailability, and targeting ability compared with those of 5b alone. Furthermore, the in vitro / in vivo results revealed that 5b / HSA-5b NPs could integrate chemotherapy and immunotherapy by synergistically attacking two different cellular components in TME at the same time, namely, polarizing the tumor-associated macrophages and inducing apoptosis of gastric cancer cells.


  • Organizational Affiliation
    • State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, Guangxi 541004, P. R. China.

Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serum albumin
A, B
583Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P02768 (Homo sapiens)
Explore P02768 
Go to UniProtKB:  P02768
PHAROS:  P02768
GTEx:  ENSG00000163631 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02768
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
J2O (Subject of Investigation/LOI)
Query on J2O

Download Ideal Coordinates CCD File 
I [auth A],
P [auth B]
11-methyl-2-oxa-4-thia-6,7-diaza-3$l^{3}-auratricyclo[7.4.0.0^{3,7}]trideca-1(13),5,9,11-tetraen-5-amine
C9 H10 Au N3 O S
MCPPSWFCAHTLOQ-UHFFFAOYSA-L
PAM (Subject of Investigation/LOI)
Query on PAM

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
J [auth B],
K [auth B],
L [auth B],
M [auth B],
N [auth B],
O [auth B]
PALMITOLEIC ACID
C16 H30 O2
SECPZKHBENQXJG-FPLPWBNLSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free:  0.300 (DCC) 
  • R-Value Work:  0.238 (Depositor), 0.240 (DCC) 
Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.187α = 105.21
b = 92.207β = 89.68
c = 95.435γ = 100.1
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-23
    Type: Initial release
  • Version 1.1: 2023-11-29
    Changes: Data collection, Refinement description
  • Version 1.2: 2024-10-23
    Changes: Structure summary
  • Version 1.3: 2025-08-20
    Changes: Database references