Human H chain ferritin mutant-MBP

Experimental Data Snapshot

  • Resolution: 3.50 Å
  • R-Value Free: 0.399 
  • R-Value Work: 0.339 
  • R-Value Observed: 0.341 

wwPDB Validation   3D Report Full Report

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Re-designing ferritin nanocages for mercuric ion detection.

Wang, Y.Chen, H.Zang, J.Zhang, X.Zhao, G.

(2019) Analyst 144: 5890-5897

  • DOI: https://doi.org/10.1039/c9an01110b
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Protein nanocages have recently received considerable attention in the fields of nanoscience and nanomedicine and have been used as either biotemplates for the preparation of a variety of nanomaterials or vehicles for drugs or imaging agents. However, their utilization for detection of heavy metal ions has yet to be explored. In this study, by grafting a mercury binding peptide (MBP) on the exterior surface of a recombinant human H-chain ferritin (rHuHF) nanocage, we successfully prepared a new protein nanocage (HuHF-MBP) which exhibits high binding capacity and affinity for Hg2+. The fluorescence of HuHF-MBP labeled with a green fluorescent dye fluorescein isothiocyanate (FITC) can be quenched by graphene oxide (GO), while addition of Hg2+ to the above solution recovered the quenched fluorescence in a dose-dependent manner. Thus, this system consisting of FITC-labeled HuHF-MBP and GO, where FITC and graphene oxide were used as fluorescent reporter probes, has great potential to be explored as a sensor for Hg2+ detection. Indeed, this newly constructed protein sensor exhibited high sensitivity and selectivity for Hg2+, and the limit of detection was 1.0 nM. The construction of this system provides an alternative strategy for the preparation of heavy metal ion sensors by using protein nanocages as biotemplates.

  • Organizational Affiliation

    Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing Key Laboratory of Functional Food from Plant Resources, Beijing, 100083, China. xiuqingzhang@cau.edu.cn gzhao@cau.edu.cn.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X
189Homo sapiensMutation(s): 1 
Gene Names: FTH1
UniProt & NIH Common Fund Data Resources
Find proteins for P02794 (Homo sapiens)
Explore P02794 
Go to UniProtKB:  P02794
GTEx:  ENSG00000167996 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02794
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.50 Å
  • R-Value Free: 0.399 
  • R-Value Work: 0.339 
  • R-Value Observed: 0.341 
  • Space Group: P 42
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 217.524α = 90
b = 217.524β = 90
c = 146.821γ = 90
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (China)China2018YFD0901004

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-09
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Refinement description