1HQJ

CRYSTAL STRUCTURE OF A DE NOVO DESIGNED TRIMERIC COILED-COIL PEPTIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Design of a minimal protein oligomerization domain by a structural approach.

Burkhard, P.Meier, M.Lustig, A.

(2000) Protein Sci. 9: 2294-2301

  • DOI: 10.1110/ps.9.12.2294

  • PubMed Abstract: 
  • Because of the simplicity and regularity of the alpha-helical coiled coil relative to other structural motifs, it can be conveniently used to clarify the molecular interactions responsible for protein folding and stability. Here we describe the de no ...

    Because of the simplicity and regularity of the alpha-helical coiled coil relative to other structural motifs, it can be conveniently used to clarify the molecular interactions responsible for protein folding and stability. Here we describe the de novo design and characterization of a two heptad-repeat peptide stabilized by a complex network of inter- and intrahelical salt bridges. Circular dichroism spectroscopy and analytical ultracentrifugation show that this peptide is highly alpha-helical and 100% dimeric tinder physiological buffer conditions. Interestingly, the peptide was shown to switch its oligomerization state from a dimer to a trimer upon increasing ionic strength. The correctness of the rational design principles used here is supported by details of the atomic structure of the peptide deduced from X-ray crystallography. The structure of the peptide shows that it is not a molten globule but assumes a unique, native-like conformation. This de novo peptide thus represents an attractive model system for the design of a molecular recognition system.


    Organizational Affiliation

    M.E. Muller Institute for Structural Biology, Biozentrum, University of Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIN-ASP-GLU-LEU-GLU-ALA-ARG-ILE-ARG-GLU-LEU-GLU-ALA-ARG-ILE-LYS-NH2
A, B, C, D, E, F, G, H, I, J, K, L
15N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, C, F, I
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
SIN
Query on SIN

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L
SUCCINIC ACID
C4 H6 O4
KDYFGRWQOYBRFD-UHFFFAOYSA-N
 Ligand Interaction
PB
Query on PB

Download SDF File 
Download CCD File 
A, D, E, F, G, H, I, K, L
LEAD (II) ION
Pb
RVPVRDXYQKGNMQ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.2 Å
  • R-Value Free: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.334α = 90.00
b = 44.874β = 90.00
c = 81.043γ = 90.00
Software Package:
Software NamePurpose
SHELXLrefinement
CNSphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-03-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description