1TUD

ALPHA-SPECTRIN SRC HOMOLOGY 3 DOMAIN, CIRCULAR PERMUTANT, CUT AT N47-D48


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The order of secondary structure elements does not determine the structure of a protein but does affect its folding kinetics.

Viguera, A.R.Blanco, F.J.Serrano, L.

(1995) J Mol Biol 247: 670-681

  • DOI: 10.1006/jmbi.1994.0171
  • Primary Citation of Related Structures:  
    1TUD, 1TUC

  • PubMed Abstract: 
  • We have analyzed the structure, stability and folding kinetics of circularly permuted forms of alpha-spectrin SH3 domain. All the possible permutations involving the disruption of the covalent linkage between two beta-strands forming a beta-hairpin have been done ...

    We have analyzed the structure, stability and folding kinetics of circularly permuted forms of alpha-spectrin SH3 domain. All the possible permutations involving the disruption of the covalent linkage between two beta-strands forming a beta-hairpin have been done. The different proteins constructed here fold to a native conformation similar to that of wild-type protein, as demonstrated by nuclear magnetic resonance and circular dichroism. Although all the mutants have similar stabilities (they are 1 to 2 kcal mol-1 less stable than the wild-type) their rate constants for folding and unfolding are quite different. Protein engineering, in combination with kinetics indicates that the folding pathway has been changed in the circularly permuted proteins. We conclude that neither the order of secondary structure elements, nor the preservation of any of the beta-hairpins present in this domain, is crucial for the ability of the polypeptide to fold, but they influence the folding and unfolding kinetics and could determine its folding pathway.


    Organizational Affiliation

    EMBL, Heidelberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-SPECTRIN A62Gallus gallusMutation(s): 2 
Gene Names: SPTAN1SPTA2
Find proteins for P07751 (Gallus gallus)
Explore P07751 
Go to UniProtKB:  P07751
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 31.95α = 90
b = 42.88β = 90
c = 54.19γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-08-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance