3ZMF

Salmonella enterica SadA 303-358 fused to GCN4 adaptors (SadAK2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A New Expression System for Protein Crystallization Using Trimeric Coiled-Coil Adaptors.

Hernandez Alvarez, B.Hartmann, M.D.Albrecht, R.Lupas, A.N.Zeth, K.Linke, D.

(2008) Protein Eng.Des.Sel. 21: 11

  • DOI: 10.1093/protein/gzm071
  • Also Cited By: 2YNY, 2WPQ

  • PubMed Abstract: 
  • We repeatedly experienced difficulties in obtaining pure protein of a defined oligomeric state when expressing domains that consist partially or entirely of coiled coils. We therefore modified an established expression vector, pASK-IBA, to generate N ...

    We repeatedly experienced difficulties in obtaining pure protein of a defined oligomeric state when expressing domains that consist partially or entirely of coiled coils. We therefore modified an established expression vector, pASK-IBA, to generate N- and C-terminal fusions of the cloned domain in heptad register with the GCN4 leucine zipper. GCN4 is a well-characterized coiled coil, for which stable dimeric, trimeric and tetrameric forms exist. To test this expression system, we produced a series of constructs derived from the trimeric autotransporter adhesin STM3691 of Salmonella (SadA), which has a highly repetitive structure punctuated by coiled-coil regions. The constructs begin and end with predicted coiled-coil segments of SadA, each fused in the correct heptad register to the trimeric form of GCN4, GCN4pII. All constructs were expressed at high levels, trimerized either natively or after refolding from inclusion bodies, and yielded crystals that diffracted to high resolution. Thus, fusion to GCN4pII allows for the efficient expression and crystallization of proteins containing trimeric coiled coils. The structure of short constructs can be solved conveniently by molecular replacement using the known GCN4 structure as a search model. The system can be adapted for constructs with dimeric or tetrameric coiled coils, using the corresponding GCN4 variants.


    Related Citations: 
    • Complete Fiber Structures of Complex Trimeric Autotransporter Adhesins Conserved in Enterobacteria.
      Hartmann, M.D.,Grin, I.,Dunin-Horkawicz, S.,Deiss, S.,Linke, D.,Lupas, A.N.,Hernandez Alvarez, B.
      (2012) Proc.Natl.Acad.Sci.USA 109: 20907


    Organizational Affiliation

    Department Protein Evolution, Max Planck Institute for Developmental Biology, Spemannstr. 35, 72076 Tübingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GENERAL CONTROL PROTEIN GCN4, PUTATIVE INNER MEMBRANE PROTEIN, GENERAL CONTROL PROTEIN GCN4
A, B, C
113Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
This entity is chimeric
Mutation(s): 16 
Gene Names: sadA, GCN4 (AAS3, ARG9)
Find proteins for Q8ZL64 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  Q8ZL64
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P03069
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 46.590α = 90.00
b = 46.590β = 90.00
c = 128.980γ = 120.00
Software Package:
Software NamePurpose
XSCALEdata scaling
MOLREPphasing
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-20
    Type: Initial release
  • Version 1.1: 2017-03-15
    Type: Source and taxonomy