1TFE

DIMERIZATION DOMAIN OF EF-TS FROM T. THERMOPHILUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.285 
  • R-Value Work: 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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ELONGATION FACTOR TS
A
145Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)Mutation(s): 0 
Gene Names: tsf
Find proteins for P43895 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Go to UniProtKB:  P43895
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.207 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 60.100α = 90.00
b = 60.100β = 90.00
c = 94.300γ = 120.00
Software Package:
Software NamePurpose
DPHASEphasing
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
DPHASEmodel building
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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