2V9V

Crystal Structure of Moorella thermoacetica SelB(377-511)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.141 
  • R-Value Work: 0.120 
  • R-Value Observed: 0.121 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Conformational Switches in Winged-Helix Domains 1 and 2 of Bacterial Translation Elongation Factor Selb.

Ganichkin, O.Wahl, M.C.

(2007) Acta Crystallogr D Biol Crystallogr 63: 1075

  • DOI: 10.1107/S0907444907042229
  • Primary Citation of Related Structures:  
    2V9V

  • PubMed Abstract: 
  • The crystal structure of the first two winged-helix motifs of translation elongation factor SelB from Moorella thermoacetica has been determined at 1.1 A resolution. Compared with the previous structure of the two domains in conjunction with winged-helix modules 3 and 4, the first winged-helix domain underwent a substantial conformational change during which the alpha-helical and beta-sheet portions of the element opened up like a shell ...

    The crystal structure of the first two winged-helix motifs of translation elongation factor SelB from Moorella thermoacetica has been determined at 1.1 A resolution. Compared with the previous structure of the two domains in conjunction with winged-helix modules 3 and 4, the first winged-helix domain underwent a substantial conformational change during which the alpha-helical and beta-sheet portions of the element opened up like a shell. This conformational rearrangement was elicited by a change in the orientation of Trp396, leading to the disclosure of a bona fide ligand-binding site in the direct vicinity of Trp396. Additionally, the C-terminal tail of the second domain followed a different path compared with the previous structure. It is conceivable that these conformational switches constitute part of the molecular mechanism that underlies the communication between the N-terminal part of SelB, which binds Sec-tRNA(Sec) and GTP, and the C-terminal part of the protein, which binds selenocysteine-insertion sequences.


    Organizational Affiliation

    Max-Planck-Institut für Biophysikalische Chemie, Makromolekulare Röntgenkristallographie, Am Fassberg 11, D-37077 Göttingen, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SELENOCYSTEINE-SPECIFIC ELONGATION FACTORA135Moorella thermoaceticaMutation(s): 0 
Gene Names: selB
UniProt
Find proteins for Q46455 (Moorella thermoacetica)
Explore Q46455 
Go to UniProtKB:  Q46455
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ46455
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.141 
  • R-Value Work: 0.120 
  • R-Value Observed: 0.121 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.349α = 90
b = 46.087β = 120.45
c = 58.683γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-03-06
    Changes: Data collection, Experimental preparation, Other
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation