Macromolecule Content

• Total Structure Weight: 2.20 kDa 
• Atom Count: 144 
• Modelled Residue Count: 20 
• Deposited Residue Count: 20 
• Unique protein chains: 1

1M4E

Solution Structure of Hepcidin-20

• DOI: 10.2210/pdb1M4E/pdb
• BMRB: 5501
• BMRB: 5502

• Classification: ANTIMICROBIAL PROTEIN
• Mutation(s): No 


• Deposited: 2002-07-02 Released: 2002-11-06 
• Deposition Author(s): Hunter, H.N., Fulton, D.B., Ganz, T., Vogel, H.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

The solution structure of human hepcidin, a peptide hormone with antimicrobial activity that is involved in iron uptake and hereditary hemochromatosis.

Hunter, H.N., Fulton, D.B., Ganz, T., Vogel, H.J.

(2002) J Biol Chem 277: 37597-37603

• PubMed: 12138110 
• DOI: 10.1074/jbc.M205305200
• Primary Citation of Related Structures:  
  1M4F, 1M4E


• PubMed Abstract: 
  

The antibacterial and antifungal peptide hepcidin (LEAP-1) is expressed in the liver. This circulating peptide has recently been found to also act as a signaling molecule in iron metabolism. As such, it plays an important role in hereditary hemochromatosis, a serious iron overload disease. In this study, we report the solution structures of the hepcidin-20 and -25 amino acid peptides determined by standard two-dimensional (1)H NMR spectroscopy. These small cysteine-rich peptides form a distorted beta-sheet with an unusual vicinal disulfide bridge found at the turn of the hairpin, which is probably of functional significance. Both peptides exhibit an overall amphipathic structure with six of the eight Cys involved in maintaining interstrand connectivity. Hepcidin-25 assumes major and minor conformations centered about the Pro residue near the N-terminal end. Further NMR diffusion studies indicate that hepcidin-20 exists as a monomer in solution, whereas hepcidin-25 readily aggregates, a property that may contribute to the different activities of the two peptides. The nuclear Overhauser enhancement spectroscopy spectra of the hepcidin-25 aggregates indicate an interface for peptide interactions that again involves the first five residues from the N-terminal end.

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Organizational Affiliation: 

Department of Biological Sciences, University of Calgary, Calgary, Alberta T2N 1N4, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hepcidin	A	20	N/A	Mutation(s): 0
Find proteins for P81172 (Homo sapiens) Explore P81172  Go to UniProtKB:  P81172
NIH Common Fund Data Resources
PHAROS:  P81172 GTEx:  ENSG00000105697

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1M4E Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-07-02 
• Released Date: 2002-11-06 
Deposition Author(s): Hunter, H.N., Fulton, D.B., Ganz, T., Vogel, H.J.

Revision History  

• Version 1.0: 2002-11-06
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance