Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

 3D View: Structure | Electron Density

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Protein Workshop | Ligand Explorer

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 6992.24 
• Atom Count: 470 
• Residue Count: 60 
• Unique protein chains: 1

1DFN

CRYSTAL STRUCTURE OF DEFENSIN HNP-3, AN AMPHIPHILIC DIMER: MECHANISMS OF MEMBRANE PERMEABILIZATION

• DOI: 10.2210/pdb1DFN/pdb

• Classification: DEFENSIN
• Organism(s): Homo sapiens


• Deposited: 1991-01-18 Released: 1992-07-15 
• Deposition Author(s): Hill, C.P., Yee, J., Selsted, M.E., Eisenberg, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å

Literature

Crystal structure of defensin HNP-3, an amphiphilic dimer: mechanisms of membrane permeabilization.

Hill, C.P., Yee, J., Selsted, M.E., Eisenberg, D.

(1991) Science 251: 1481-1485

• PubMed: 2006422 


• PubMed Abstract: 
  

Defensins (molecular weight 3500 to 4000) act in the mammalian immune response by permeabilizing the plasma membranes of a broad spectrum of target organisms, including bacteria, fungi, and enveloped viruses. The high-resolution crystal structure of defensin HNP-3 (1.9 angstrom resolution, R factor 0.19) reveals a dimeric beta sheet that has an architecture very different from other lytic peptides. The dimeric assembly suggests mechanisms by which defensins might bind to and permeabilize the lipid bilayer.

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Related Citations: 

• Defensins. Natural Peptide Antibiotics of Human Neutrophils
  Ganz, T.,Selsted, M.E.,Szklarek, D.,Harwig, S.S.L.,Daher, K.,Bainton, D.F.,Lehrer, R.I.
  (1985) J.Clin.Invest. 76: 1427
• Primary Structures of Three Human Neutrophil Defensins
  Selsted, M.E.,Harwig, S.S.L.,Ganz, T.,Schilling, J.W.,Lehrer, R.I.
  (1985) J.Clin.Invest. 76: 1436




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Organizational Affiliation: 

Eisenberg, Molecular Biology Institute, Los Angeles, CA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
DEFENSIN HNP-3	A, B	30	Homo sapiens	Mutation(s): 0  Gene Names: DEFA3 (DEF3)
Find proteins for P59666 (Homo sapiens) Go to Gene View: DEFA3 Go to UniProtKB:  P59666

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 30.800	α = 90.00
b = 45.000	β = 90.00
c = 40.300	γ = 90.00

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1991-01-18 
• Released Date: 1992-07-15 
• Deposition Author(s): Hill, C.P., Yee, J., Selsted, M.E., Eisenberg, D.

Revision History 

• Version 1.0: 1992-07-15
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-11-29
  Type: Derived calculations, Other