3AZD

Crystal structure of tropomyosin N-terminal fragment at 0.98A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.98 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structure of a tropomyosin N-terminal fragment at 0.98 A resolution

Meshcheryakov, V.A.Krieger, I.Kostyukova, A.S.Samatey, F.A.

(2011) Acta Crystallogr D Biol Crystallogr 67: 822-825

  • DOI: https://doi.org/10.1107/S090744491102645X
  • Primary Citation of Related Structures:  
    3AZD

  • PubMed Abstract: 

    Tropomyosin (TM) is an elongated two-chain protein that binds along actin filaments. Important binding sites are localized in the N-terminus of tropomyosin. The structure of the N-terminus of the long muscle α-TM has been solved by both NMR and X-ray crystallography. Only the NMR structure of the N-terminus of the short nonmuscle α-TM is available. Here, the crystal structure of the N-terminus of the short nonmuscle α-TM (αTm1bZip) at a resolution of 0.98 Å is reported, which was solved from crystals belonging to space group P3(1) with unit-cell parameters a = b = 33.00, c = 52.03 Å, α = β = 90, γ = 120°. The first five N-terminal residues are flexible and residues 6-35 form an α-helical coiled coil. The overall fold and the secondary structure of the crystal structure of αTM1bZip are highly similar to the NMR structure and the atomic coordinates of the corresponding C(α) atoms between the two structures superimpose with a root-mean-square deviation of 0.60 Å. The crystal structure validates the NMR structure, with the positions of the side chains being determined precisely in our structure.


  • Organizational Affiliation

    Trans-Membrane Trafficking Unit, Okinawa Institute of Science and Technology, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
short alpha-tropomyosin,transcription factor GCN4
A, B
37Rattus norvegicusSaccharomyces cerevisiae S288C
This entity is chimeric
Mutation(s): 0 
UniProt
Find proteins for P03069 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P03069 
Go to UniProtKB:  P03069
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03069
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.98 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.168 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33α = 90
b = 33β = 90
c = 52.03γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-10-19
    Type: Initial release
  • Version 1.1: 2017-06-14
    Changes: Source and taxonomy, Structure summary
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Refinement description