1JCD

Crystal Structure of a Novel Alanine-Zipper Trimer at 1.3 A Resolution, I6A,L9A,V13A,L16A,V20A,L23A,V27A,M30A,V34A,L48A,M51A mutations


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

An Alanine-Zipper Structure Determined by Long Range Intermolecular Interactions

Liu, J.Lu, M.

(2002) J.Biol.Chem. 277: 48708-48713

  • DOI: 10.1074/jbc.M208773200

  • PubMed Abstract: 
  • A major challenge in protein folding is to identify and quantify specific structural determinants that allow native proteins to acquire their unique folded structures. Here we report the engineering of a 52-residue protein (Ala-14) that contains excl ...

    A major challenge in protein folding is to identify and quantify specific structural determinants that allow native proteins to acquire their unique folded structures. Here we report the engineering of a 52-residue protein (Ala-14) that contains exclusively alanine residues at the hydrophobic a and d positions of a natural heptad-repeat sequence. Ala-14 is unfolded under normal solution conditions yet forms a parallel three-stranded alpha-helical coiled coil in crystals. Ala-14 trimers in the solid state associate with each other through the pairing of polar side chains and formation of an extended network of water-mediated hydrogen bonds. In contrast to the classical view that local intramolecular tertiary interactions dictate the three-dimensional structure of small single-domain proteins, Ala-14 shows that long range intermolecular interactions can be essential in determining the metastable alanine-zipper structure. A similar interplay between short range local and longer range global forces may underlie the conformational properties of the growing class of natively unstructured proteins in biological processes.


    Organizational Affiliation

    Department of Biochemistry, Weill Medical College of Cornell University, New York, New York 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAJOR OUTER MEMBRANE LIPOPROTEIN
A, B, C
52Escherichia coli (strain K12)Gene Names: lpp (mlpA, mulI)
Find proteins for P69776 (Escherichia coli (strain K12))
Go to UniProtKB:  P69776
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.149 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 21.842α = 88.05
b = 26.935β = 84.95
c = 45.805γ = 87.56
Software Package:
Software NamePurpose
AMoREphasing
MADNESSdata collection
MADNESSdata reduction
SCALEPACKdata scaling
SHELXL-97refinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-06-08 
  • Released Date: 2003-06-17 
  • Deposition Author(s): Liu, J., Lu, M.

Revision History 

  • Version 1.0: 2003-06-17
    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