Exploring Cystine Dense Peptide Space to Open a Unique Molecular Toolbox

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 

wwPDB Validation   3D Report Full Report

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Screening, large-scale production and structure-based classification of cystine-dense peptides.

Correnti, C.E.Gewe, M.M.Mehlin, C.Bandaranayake, A.D.Johnsen, W.A.Rupert, P.B.Brusniak, M.Y.Clarke, M.Burke, S.E.De Van Der Schueren, W.Pilat, K.Turnbaugh, S.M.May, D.Watson, A.Chan, M.K.Bahl, C.D.Olson, J.M.Strong, R.K.

(2018) Nat Struct Mol Biol 25: 270-278

  • DOI: https://doi.org/10.1038/s41594-018-0033-9
  • Primary Citation of Related Structures:  
    6ATL, 6ATN, 6ATS, 6ATU, 6ATW, 6AU7, 6AUP, 6AV8, 6AVA, 6AVC, 6AVD

  • PubMed Abstract: 

    Peptides folded through interwoven disulfides display extreme biochemical properties and unique medicinal potential. However, their exploitation has been hampered by the limited amounts isolatable from natural sources and the expense of chemical synthesis. We developed reliable biological methods for high-throughput expression, screening and large-scale production of these peptides: 46 were successfully produced in multimilligram quantities, and >600 more were deemed expressible through stringent screening criteria. Many showed extreme resistance to temperature, proteolysis and/or reduction, and all displayed inhibitory activity against at least 1 of 20 ion channels tested, thus confirming their biological functionality. Crystal structures of 12 confirmed proper cystine topology and the utility of crystallography to study these molecules but also highlighted the need for rational classification. Previous categorization attempts have focused on limited subsets featuring distinct motifs. Here we present a global definition, classification and analysis of >700 structures of cystine-dense peptides, providing a unifying framework for these molecules.

  • Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA, USA.


Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Potassium channel toxin kappa-KTx 1.225Chersonesometrus fulvipesMutation(s): 0 
Find proteins for P82851 (Chersonesometrus fulvipes)
Explore P82851 
Go to UniProtKB:  P82851
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP82851
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.102α = 90
b = 21.323β = 92.6
c = 20.368γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-02-28
    Type: Initial release
  • Version 1.1: 2018-03-14
    Changes: Database references