6Q5H

Crystal structure of a CC-Hex mutant that forms an antiparallel four-helix coiled coil CC-Hex*-L24D


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.151 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Navigating the Structural Landscape of De Novo alpha-Helical Bundles.

Rhys, G.G.Wood, C.W.Beesley, J.L.Zaccai, N.R.Burton, A.J.Brady, R.L.Thomson, A.R.Woolfson, D.N.

(2019) J.Am.Chem.Soc. 141: 8787-8797

  • DOI: 10.1021/jacs.8b13354
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The association of amphipathic α helices in water leads to α-helical-bundle protein structures. However, the driving force for this-the hydrophobic effect-is not specific and does not define the number or the orientation of helices in the associated ...

    The association of amphipathic α helices in water leads to α-helical-bundle protein structures. However, the driving force for this-the hydrophobic effect-is not specific and does not define the number or the orientation of helices in the associated state. Rather, this is achieved through deeper sequence-to-structure relationships, which are increasingly being discerned. For example, for one structurally extreme but nevertheless ubiquitous class of bundle-the α-helical coiled coils-relationships have been established that discriminate between all-parallel dimers, trimers, and tetramers. Association states above this are known, as are antiparallel and mixed arrangements of the helices. However, these alternative states are less well understood. Here, we describe a synthetic-peptide system that switches between parallel hexamers and various up-down-up-down tetramers in response to single-amino-acid changes and solution conditions. The main accessible states of each peptide variant are characterized fully in solution and, in most cases, to high resolution with X-ray crystal structures. Analysis and inspection of these structures helps rationalize the different states formed. This navigation of the structural landscape of α-helical coiled coils above the dimers and trimers that dominate in nature has allowed us to design rationally a well-defined and hyperstable antiparallel coiled-coil tetramer (apCC-Tet). This robust de novo protein provides another scaffold for further structural and functional designs in protein engineering and synthetic biology.


    Organizational Affiliation

    School of Chemistry , University of Glasgow , Glasgow G12 8QQ , United Kingdom.,BrisSynBio , University of Bristol , Life Sciences Building, Tyndall Avenue , Bristol BS8 1TQ , United Kingdom.,School of Chemistry , University of Bristol , Cantock's Close , Bristol BS8 1TS , United Kingdom.,School of Biochemistry , University of Bristol , Medical Sciences Building, University Walk , Bristol BS8 1TD , United Kingdom.,Frick Chemistry Laboratory , Princeton University , Princeton , New Jersey 08544 , United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CC-Hex*-L24D
A, B
32N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NH4
Query on NH4

Download SDF File 
Download CCD File 
A
AMMONIUM ION
H4 N
QGZKDVFQNNGYKY-UHFFFAOYSA-O
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B
NON-POLYMERH2 N

--

ACE
Query on ACE
A, B
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.151 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 70.200α = 90.00
b = 70.200β = 90.00
c = 35.580γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/J014400/1
Engineering and Physical Sciences Research CouncilUnited KingdomEP/G036764/1
European Research CouncilBelgium340764
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/R00661X/1
Engineering and Physical Sciences Research CouncilUnited KingdomEP/K03927X/1

Revision History 

  • Version 1.0: 2019-05-22
    Type: Initial release
  • Version 1.1: 2019-06-19
    Type: Data collection, Database references