1TFE

DIMERIZATION DOMAIN OF EF-TS FROM T. THERMOPHILUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure and importance of the dimerization domain in elongation factor Ts from Thermus thermophilus.

Jiang, Y.Nock, S.Nesper, M.Sprinzl, M.Sigler, P.B.

(1996) Biochemistry 35: 10269-10278

  • DOI: 10.1021/bi960918w
  • Primary Citation of Related Structures:  
    1TFE

  • PubMed Abstract: 
  • Elongation factor Ts (EF-Ts) functions as a nucleotide-exchange factor by binding elongation factor Tu (EF-Tu) and accelerating the GDP dissociation from EF-Tu; thus EF-Ts promotes the transition of EF-Tu from the inactive GDP form to the active GTP form ...

    Elongation factor Ts (EF-Ts) functions as a nucleotide-exchange factor by binding elongation factor Tu (EF-Tu) and accelerating the GDP dissociation from EF-Tu; thus EF-Ts promotes the transition of EF-Tu from the inactive GDP form to the active GTP form. Thermus thermophilus EF-Ts exists as a stable dimer in solution which binds two molecules of EF-Tu to form a (EF-Tu.EF-Ts)2 heterotetramer. Here we report the crystal structure of the dimerization domain of EF-Ts from T. thermophilus refined to 1.7 A resolution. A three-stranded antiparallel beta-sheet from each subunit interacts to form a beta-sandwich that serves as an extensive dimer interface tethered by a disulfide bond. This interface is distinctly different from the predominantly alpha-helical one that stabilizes the EF-Ts dimer from Escherichia coli [Kawashima, T., et al. (1996) Nature 379, 511-518]. To test whether the homodimeric form of T. thermophilus EF-Ts is necessary for catalyzing nucleotide exchange, the present structure was used to design mutational changes within the dimer interface that disrupt the T. thermophilus EF-Ts dimer but not the tertiary structure of the subunits. Surprisingly, EF-Ts monomers created in this manner failed to catalyze nucleotide exchange in EF-Tu, indicating that, in vitro. T. thermophilus EF-Ts functions only as a homodimer.


    Organizational Affiliation

    Department of Chemistry, Howard Hughes Medical Institute, Yale University, New Haven, Connecticut 06520, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ELONGATION FACTOR TSA145Thermus thermophilusMutation(s): 0 
Gene Names: tsf
Find proteins for P43895 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Explore P43895 
Go to UniProtKB:  P43895
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.1α = 90
b = 60.1β = 90
c = 94.3γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
DPHASEmodel building
X-PLORmodel building
X-PLORrefinement
DPHASEphasing
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-11-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-21
    Changes: Data collection