3R4A

Crystal structure of the 4-helix coiled coil CC-tet


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0701 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A de novo peptide hexamer with a mutable channel.

Zaccai, N.R.Chi, B.Thomson, A.R.Boyle, A.L.Bartlett, G.J.Bruning, M.Linden, N.Sessions, R.B.Booth, P.J.Brady, R.L.Woolfson, D.N.

(2011) Nat.Chem.Biol. 7: 935-941

  • DOI: 10.1038/nchembio.692
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The design of new proteins that expand the repertoire of natural protein structures represents a formidable challenge. Success in this area would increase understanding of protein structure and present new scaffolds that could be exploited in biotech ...

    The design of new proteins that expand the repertoire of natural protein structures represents a formidable challenge. Success in this area would increase understanding of protein structure and present new scaffolds that could be exploited in biotechnology and synthetic biology. Here we describe the design, characterization and X-ray crystal structure of a new coiled-coil protein. The de novo sequence forms a stand-alone, parallel, six-helix bundle with a channel running through it. Although lined exclusively by hydrophobic leucine and isoleucine side chains, the 6-Å channel is permeable to water. One layer of leucine residues within the channel is mutable, accepting polar aspartic acid and histidine side chains, which leads to subdivision and organization of solvent within the lumen. Moreover, these mutants can be combined to form a stable and unique (Asp-His)(3) heterohexamer. These new structures provide a basis for engineering de novo proteins with new functions.


    Organizational Affiliation

    School of Biochemistry, University of Bristol, Bristol, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
coiled coil helix CC-tet
A, B, C, D
34N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B, C, D
NON-POLYMERH2 N

--

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

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.0701 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.209 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 44.730α = 90.00
b = 50.900β = 90.00
c = 103.060γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
PHENIXrefinement
SCALEPACKdata scaling
CNSrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-16
    Type: Initial release
  • Version 1.1: 2011-11-30
    Type: Database references
  • Version 1.2: 2017-10-25
    Type: Author supporting evidence
  • Version 1.3: 2019-07-17
    Type: Data collection, Refinement description, Source and taxonomy