5GWG

Solution structure of rattusin


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Rattusin structure reveals a novel defensin scaffold formed by intermolecular disulfide exchanges

Min, H.J.Yun, H.Ji, S.Rajasekaran, G.Kim, J.I.Kim, J.S.Shin, S.Y.Lee, C.W.

(2017) Sci Rep 7: 45282-45282

  • DOI: 10.1038/srep45282

  • PubMed Abstract: 
  • Defensin peptides are essential for innate immunity in humans and other living systems, as they provide protection against infectious pathogens and regulate the immune response. Here, we report the solution structure of rattusin (RTSN), an α-defensin ...

    Defensin peptides are essential for innate immunity in humans and other living systems, as they provide protection against infectious pathogens and regulate the immune response. Here, we report the solution structure of rattusin (RTSN), an α-defensin-related peptide, which revealed a novel C 2 -symmetric disulfide-linked dimeric structure. RTSN was synthesized by solid-phase peptide synthesis (SPPS) and refolded by air oxidation in vitro. Dimerization of the refolded RTSN (r-RTSN) resulted from five intermolecular disulfide (SS) bond exchanges formed by ten cysteines within two protomer chains. The SS bond pairings of r-RTSN were determined by mass analysis of peptide fragments cleaved by trypsin digestion. In addition to mass analysis, nuclear magnetic resonance (NMR) experiments for a C15S mutant and r-RTSN confirmed that the intermolecular SS bond structure of r-RTSN showed an I-V', II-IV', III-III', IV-II', V-I' arrangement. The overall structure of r-RTSN exhibited a cylindrical array, similar to that of β-sandwich folds, with a highly basic surface. Furthermore, fluorescence spectroscopy results suggest that r-RTSN exerts bactericidal activity by damaging membrane integrity. Collectively, these results provide a novel structural scaffold for designing highly potent peptide-based antibiotics suitable for use under various physiological conditions.


    Organizational Affiliation

    Department of Chemistry, Chonnam National University, Gwangju 61186, South Korea.,Department of Pharmaceutical Cosmetics, Kwangju Women's University, Gwangju 62396, South Korea.,Department of Life Science, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea.,Department of Medical Science, Graduate School and Department of Cellular and Molecular Medicine, School of Medicine, Chosun University, Gwangju 61452, South Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Defensin alpha-related sequence 1
A, B
31Rattus norvegicusMutation(s): 0 
Gene Names: Defal1 (Defa-rs1)
Find proteins for Q4JEI2 (Rattus norvegicus)
Go to UniProtKB:  Q4JEI2
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-09-11 
  • Released Date: 2017-04-12 
  • Deposition Author(s): Lee, C.W., Min, H.J.

Revision History 

  • Version 1.0: 2017-04-12
    Type: Initial release