The clavanin peptide in the presence of TFE (2,2,2-trifluoroethanol), presented a amphipathic alpha-helices from Phe-2 to Val-22 residues

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural Studies of a Lipid-Binding Peptide from Tunicate Hemocytes with Anti-Biofilm Activity.

Silva, O.N.Alves, E.S.de la Fuente-Nunez, C.Ribeiro, S.M.Mandal, S.M.Gaspar, D.Veiga, A.S.Castanho, M.A.Andrade, C.A.Nascimento, J.M.Fensterseifer, I.C.Porto, W.F.Correa, J.R.Hancock, R.E.Korpole, S.Oliveira, A.L.Liao, L.M.Franco, O.L.

(2016) Sci Rep 6: 27128

  • DOI: https://doi.org/10.1038/srep27128
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Clavanins is a class of peptides (23aa) histidine-rich, free of post-translational modifications. Clavanins have been studied largely for their ability to disrupt bacterial membranes. In the present study, the interaction of clavanin A with membranes was assessed by dynamic light scattering, zeta potential and permeabilization assays. We observed through those assays that clavanin A lysis bacterial cells at concentrations corresponding to its MIC. Further, the structure and function of clavanin A was investigated. To better understand how clavanin interacted with bacteria, its NMR structure was elucidated. The solution state NMR structure of clavanin A in the presence of TFE-d3 indicated an α-helical conformation. Secondary structures, based on circular dichroism measurements in anionic sodium dodecyl sulfate (SDS) and TFE (2,2,2-trifluorethanol), in silico lipid-peptide docking and molecular simulations with lipids DPPC and DOPC revealed that clavanin A can adopt a variety of folds, possibly influencing its different functions. Microcalorimetry assays revealed that clavanin A was capable of discriminating between different lipids. Finally, clavanin A was found to eradicate bacterial biofilms representing a previously unrecognized function.

  • Organizational Affiliation

    Departamento Biologia, Instituto de Ciências Biológicas, Programa de pós-graduação em Genética e Biotecnologia, Universidade Federal de Juiz de Fora, Juiz de Fora-MG, 36036-900, Brazil.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Clavanin-A24Styela clavaMutation(s): 1 
Membrane Entity: Yes 
Find proteins for P80710 (Styela clava)
Explore P80710 
Go to UniProtKB:  P80710
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP80710
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Brazilian National Council for Scientific and Technological Development (CNPq)Brazil+55613211-9000

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-07
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2020-01-08
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2023-06-14
    Changes: Database references, Derived calculations, Other