1AL1

CRYSTAL STRUCTURE OF ALPHA1: IMPLICATIONS FOR PROTEIN DESIGN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Observed: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of alpha 1: implications for protein design.

Hill, C.P.Anderson, D.H.Wesson, L.DeGrado, W.F.Eisenberg, D.

(1990) Science 249: 543-546

  • DOI: 10.1126/science.2382133
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • X-ray diffraction shows the structure of a synthetic protein model, formed from noncovalent self-association of a 12-residue peptide and of sulfate ions at low pH. This peptide is a fragment of a 16-residue polypeptide that was designed to form an am ...

    X-ray diffraction shows the structure of a synthetic protein model, formed from noncovalent self-association of a 12-residue peptide and of sulfate ions at low pH. This peptide is a fragment of a 16-residue polypeptide that was designed to form an amphiphilic alpha helix with a ridge of Leu residues along one helical face. By interdigitation of the leucines of four such helices, the design called for self-association into a four-alpha-helical bundle. The crystal structure (2.7 angstrom resolution; R factor = 0.215) reveals a structure more complex than the design, with both a tetramer and a hexamer. The alpha-helical tetramer with leucine interior has more oblique crossing angles than most four-alpha-helical bundles; the hexamer has a globular hydrophobic core of 12 leucine residues and three associated sulfate ions. Computational analysis suggests that the hexameric association is tighter than the tetrameric one. The consistency of the structure with the design is discussed, as well as the divergence.


    Related Citations: 
    • The Design, Synthesis, and Crystallization of an Alpha-Helical Peptide
      Eisenberg, D., Wilcox, W., Eshita, S.M., Pryciak, P.M., Ho, S.P.
      (1986) Proteins 1: 16

    Organizational Affiliation

    Molecular Biology Institute, University of California, Los Angeles 90024-1569.



Macromolecules
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA HELIX PEPTIDE: ELLKKLLEELKG
A
13synthetic constructMutation(s): 0 
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Observed: 0.211 
  • Space Group: I 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.35α = 90
b = 62.35β = 90
c = 62.35γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1991-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance