Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Octahedral - O  (3D View)
Global Stoichiometry: Homo 24-mer - A24 

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

Biological Assembly Evidence: equilibrium centrifugation

Macromolecule Content

• Total Structure Weight: 20.38 kDa 
• Atom Count: 1367 
• Residue Count: 166 
• Unique protein chains: 1

6IPQ

Non-native ferritin 8-mer mutant-C90A/C102A/C130A

• DOI: 10.2210/pdb6IPQ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2018-11-03 Released: 2019-03-13 
• Deposition Author(s): Zang, J., Chen, H., Wang, Y., Zhao, G.
• Funding Organization(s): National Natural Science Foundation of China

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Free: 0.276 
• R-Value Work: 0.196 
• R-Value Observed: 0.200 

Literature

Disulfide-mediated conversion of 8-mer bowl-like protein architecture into three different nanocages.

Zang, J., Chen, H., Zhang, X., Zhang, C., Guo, J., Du, M., Zhao, G.

(2019) Nat Commun 10: 778-778

• PubMed: 30770832 
• DOI: 10.1038/s41467-019-08788-9
• Primary Citation of Related Structures:  
  6IPP, 6IPO, 6IPQ, 6IPC, 6J7G


• PubMed Abstract: 
  

Constructing different protein nanostructures with high-order discrete architectures by using one single building block remains a challenge. Here, we present a simple, effective disulfide-mediated approach to prepare a set of protein nanocages with different geometries from single building block. By genetically deleting an inherent intra-subunit disulfide bond, we can render the conversion of an 8-mer bowl-like protein architecture (NF-8) into a 24-mer ferritin-like nanocage in solution, while selective insertion of an inter-subunit disulfide bond into NF-8 triggers its conversion into a 16-mer lenticular nanocage. Deletion of the same intra-subunit disulfide bond and insertion of the inter-subunit disulfide bond results in the conversion of NF-8 into a 48-mer protein nanocage in solution. Thus, in the laboratory, simple mutation of one protein building block can generate three different protein nanocages in a manner that is highly reminiscent of natural pentamer building block originating from viral capsids that self-assemble into protein assemblies with different symmetries.

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Organizational Affiliation: 

Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Key Laboratory of Functional Dairy, Ministry of Education, 100083, Beijing, China. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ferritin heavy chain	A	176	Homo sapiens	Mutation(s): 3  Gene Names: FTH1, FTH, FTHL6, OK/SW-cl.84, PIG15 EC: 1.16.3.1
Find proteins for P02794 (Homo sapiens) Explore P02794  Go to UniProtKB:  P02794
NIH Common Fund Data Resources
PHAROS:  P02794 GTEx:  ENSG00000167996

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.10 Å
• R-Value Free: 0.276 
• R-Value Work: 0.196 
• R-Value Observed: 0.200 
• Space Group: F 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 181.844	α = 90
b = 181.844	β = 90
c = 181.844	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2018-11-03 
• Released Date: 2019-03-13 
Deposition Author(s): Zang, J., Chen, H., Wang, Y., Zhao, G.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China	China	31730069

Revision History 

• Version 1.0: 2019-03-13
  Type: Initial release