1OMS

Structure determination by MAD: E.coli Trigger Factor binding at the ribosomal exit tunnel.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Chaperone binding at the ribosomal exit tunnel.

Kristensen, O.Gajhede, M.

(2003) Structure 11: 1547-1556

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The exit tunnel region of the ribosome is well established as a focal point for interaction between the components that guide the fate of nascent polypeptides. One of these, the chaperone trigger factor (TF), associates with the 50S ribosomal subunit ...

    The exit tunnel region of the ribosome is well established as a focal point for interaction between the components that guide the fate of nascent polypeptides. One of these, the chaperone trigger factor (TF), associates with the 50S ribosomal subunit through its N-terminal domain. Targeting of TF to ribosomes is crucial to achieve its remarkable efficiency in protein folding. A similar tight coupling to translation is found in signal recognition particle (SRP)-dependent protein translocation. Here, we report crystal structures of the E. coli TF ribosome binding domain. TF is structurally related to the Hsp33 chaperone but has a prominent ribosome anchor located as a tip of the molecule. This tip includes the previously established unique TF signature motif. Comparison reveals that this feature is not found in SRP structures. We identify a conserved helical kink as a hallmark of the TF structure that is most likely critical to ensure ribosome association.


    Related Citations: 
    • Localization of the Trigger Factor Binding Site on the Ribosomal 50S Subunit.
      Blaha, G.,Wilson, D.N.,Stoller, G.,Fischer, G.,Willumeit, R.,Nierhaus, K.H.
      (2003) J.Mol.Biol. 326: 887
    • Interaction of trigger factor with the ribosome.
      Maier, R.,Eckert, B.,Scholz, C.,Lilie, H.,Schmid, F.X.
      (2003) J.Mol.Biol. 326: 585
    • L23 protein functions as a chaperone docking site on the ribosome.
      Kramer, G.,Rauch, T.,Rist, W.,Vorderwulbecke, S.,Patzelt, H.,Schulze-Specking, A.,Ban, N.,Deuerling, E.,Bukau, B.
      (2002) Nature 419: 171


    Organizational Affiliation

    Structural Biology, Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, DK-2100 Copenhagen, Denmark. ok@dfh.dk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Trigger Factor
A, B, C
121Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: tig
EC: 5.2.1.8
Find proteins for P0A850 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A850
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

Download SDF File 
Download CCD File 
B, C
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
SO2
Query on SO2

Download SDF File 
Download CCD File 
B
SULFUR DIOXIDE
O2 S
RAHZWNYVWXNFOC-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.208 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 71.644α = 90.00
b = 71.644β = 90.00
c = 375.409γ = 120.00
Software Package:
Software NamePurpose
SHARPphasing
CCP4data scaling
CNSrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-12-16
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance