A collapsed hexameric state of a de novo coiled-coil assembly: CC-Type2-(GgLaId)4-W19BrPhe.

Experimental Data Snapshot

  • Resolution: 1.42 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.149 
  • R-Value Observed: 0.151 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


Coiled coils 9-to-5: rational de novo design of alpha-helical barrels with tunable oligomeric states.

Dawson, W.M.Martin, F.J.O.Rhys, G.G.Shelley, K.L.Brady, R.L.Woolfson, D.N.

(2021) Chem Sci 12: 6923-6928

  • DOI: https://doi.org/10.1039/d1sc00460c
  • Primary Citation of Related Structures:  
    7A1T, 7BAS, 7BAT, 7BAU, 7BAV, 7BAW, 7BIM

  • PubMed Abstract: 

    The rational design of linear peptides that assemble controllably and predictably in water is challenging. Short sequences must encode unique target structures and avoid alternative states. However, the non-covalent forces that stabilize and discriminate between states are weak. Nonetheless, for α-helical coiled-coil assemblies considerable progress has been made in rational de novo design. In these, sequence repeats of nominally hydrophobic ( h ) and polar ( p ) residues, hpphppp , direct the assembly of amphipathic helices into dimeric to tetrameric bundles. Expanding this pattern to hpphhph can produce larger α-helical barrels. Here, we show that pentameric to nonameric barrels are accessed by varying the residue at one of the h sites. In peptides with four L/I-K-E-I-A-x-Z repeats, decreasing the size of Z from threonine to serine to alanine to glycine gives progressively larger oligomers. X-ray crystal structures of the resulting α-helical barrels rationalize this: side chains at Z point directly into the helical interfaces, and smaller residues allow closer helix contacts and larger assemblies.

  • Organizational Affiliation

    School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK w.dawson@bristol.ac.uk d.n.woolfson@bristol.ac.uk.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
32synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.42 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.149 
  • R-Value Observed: 0.151 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.646α = 90
b = 129.687β = 90
c = 59.141γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DIALSdata reduction
xia2data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research Council (ERC)European Union340764

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-19
    Type: Initial release
  • Version 1.1: 2021-11-17
    Changes: Data collection, Database references, Structure summary