1NEG

Crystal Structure Analysis of N-and C-terminal labeled SH3-domain of alpha-Chicken Spectrin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Rapid purification and crystal structure analysis of a small protein carrying two terminal affinity tags

Mueller, U.Buessow, K.Diehl, A.Bartl, F.J.Niesen, F.H.Nyarsik, L.Heinemann, U.

(2003) J.STRUCT.FUNCT.GENOM. 4: 217-225


  • PubMed Abstract: 
  • Small peptide tags are often fused to proteins to allow their affinity purification in high-throughput structure analysis schemes. To assess the compatibility of small peptide tags with protein crystallization and to examine if the tags alter the thr ...

    Small peptide tags are often fused to proteins to allow their affinity purification in high-throughput structure analysis schemes. To assess the compatibility of small peptide tags with protein crystallization and to examine if the tags alter the three-dimensional structure, the N-terminus of the chicken alpha-spectrin SH3 domain was labeled with a His6 tag and the C-terminus with a StrepII tag. The resulting protein, His6-SH3-StrepII, consists of 83 amino-acid residues, 23 of which originate from the tags. His6-SH3-StrepII is readily purified by dual affinity chromatography, has very similar biophysical characteristics as the untagged protein domain and crystallizes readily from a number of sparse-matrix screen conditions. The crystal structure analysis at 2.3 A resolution proves native-like structure of His6-SH3-StrepII and shows the entire His6 tag and part of the StrepII tag to be disordered in the crystal. Obviously, the fused affinity tags did not interfere with crystallization and structure analysis and did not change the protein structure. From the extreme case of His6-SH3-StrepII, where affinity tags represent 27% of the total fusion protein mass, we extrapolate that protein constructs with N- and C-terminal peptide tags may lend themselves to biophysical and structural investigations in high-throughput regimes.


    Organizational Affiliation

    Institut für Chemie/Kristallographie, Freie Universität Berlin, Takustr. 6, D-14195 Berlin, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spectrin alpha chain, brain
A
83Gallus gallusGene Names: SPTAN1 (SPTA2)
Find proteins for P07751 (Gallus gallus)
Go to Gene View: SPTAN1
Go to UniProtKB:  P07751
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AZI
Query on AZI

Download SDF File 
Download CCD File 
A
AZIDE ION
N3
IVRMZWNICZWHMI-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.200 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 41.865α = 90.00
b = 41.865β = 90.00
c = 92.865γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-14
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance