6GS5

NMR structure of temporin L in SDS micelles


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Temporin L and aurein 2.5 have identical conformations but subtly distinct membrane and antibacterial activities.

Manzo, G.Ferguson, P.M.Hind, C.K.Clifford, M.Gustilo, V.B.Ali, H.Bansal, S.S.Bui, T.T.Drake, A.F.Atkinson, R.A.Sutton, J.M.Lorenz, C.D.Phoenix, D.A.Mason, A.J.

(2019) Sci Rep 9: 10934-10934

  • DOI: 10.1038/s41598-019-47327-w
  • Primary Citation of Related Structures:  
    6GS5, 6GS9

  • PubMed Abstract: 
  • Frogs such as Rana temporaria and Litoria aurea secrete numerous closely related antimicrobial peptides (AMPs) as an effective chemical dermal defence. Damage or penetration of the bacterial plasma membrane is considered essential for AMP activity an ...

    Frogs such as Rana temporaria and Litoria aurea secrete numerous closely related antimicrobial peptides (AMPs) as an effective chemical dermal defence. Damage or penetration of the bacterial plasma membrane is considered essential for AMP activity and such properties are commonly ascribed to their ability to form secondary amphipathic, α-helix conformations in membrane mimicking milieu. Nevertheless, despite the high similarity in physical properties and preference for adopting such conformations, the spectrum of activity and potency of AMPs often varies considerably. Hence distinguishing apparently similar AMPs according to their behaviour in, and effects on, model membranes will inform understanding of primary-sequence-specific antimicrobial mechanisms. Here we use a combination of molecular dynamics simulations, circular dichroism and patch-clamp to investigate the basis for differing anti-bacterial activities in representative AMPs from each species; temporin L and aurein 2.5. Despite adopting near identical, α-helix conformations in the steady-state in a variety of membrane models, these two AMPs can be distinguished both in vitro and in silico based on their dynamic interactions with model membranes, notably their differing conformational flexibility at the N-terminus, ability to form higher order aggregates and the characteristics of induced ion conductance. Taken together, these differences provide an explanation of the greater potency and broader antibacterial spectrum of activity of temporin L over aurein 2.5. Consequently, while the secondary amphipathic, α-helix conformation is a key determinant of the ability of a cationic AMP to penetrate and disrupt the bacterial plasma membrane, the exact mechanism, potency and spectrum of activity is determined by precise structural and dynamic contributions from specific residues in each AMP sequence.


    Organizational Affiliation

    Institute of Pharmaceutical Science, School of Cancer & Pharmaceutical Science, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NH, United Kingdom. james.mason@kcl.ac.uk.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Temporin-LA13Rana temporariaMutation(s): 0 
Find proteins for P57104 (Rana temporaria)
Explore P57104 
Go to UniProtKB:  P57104
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 6GS5 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2018-06-13 
  • Released Date: 2018-07-18 
  • Deposition Author(s): Manzo, G., Mason, J.A.

Revision History 

  • Version 1.0: 2018-07-18
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection
  • Version 1.2: 2019-08-14
    Changes: Data collection, Database references