2VRH

Structure of the E. coli trigger factor bound to a translating ribosome


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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This is version 1.4 of the entry. See complete history


Literature

Molecular Mechanism and Structure of Trigger Factor Bound to the Translating Ribosome.

Merz, F.Boehringer, D.Schaffitzel, C.Preissler, S.Hoffmann, A.Maier, T.Rutkowska, A.Lozza, J.Ban, N.Bukau, B.Deuerling, E.

(2008) EMBO J 27: 1622

  • DOI: https://doi.org/10.1038/emboj.2008.89
  • Primary Citation of Related Structures:  
    2VRH

  • PubMed Abstract: 

    Ribosome-associated chaperone Trigger Factor (TF) initiates folding of newly synthesized proteins in bacteria. Here, we pinpoint by site-specific crosslinking the sequence of molecular interactions of Escherichia coli TF and nascent chains during translation. Furthermore, we provide the first full-length structure of TF associated with ribosome-nascent chain complexes by using cryo-electron microscopy. In its active state, TF arches over the ribosomal exit tunnel accepting nascent chains in a protective void. The growing nascent chain initially follows a predefined path through the entire interior of TF in an unfolded conformation, and even after folding into a domain it remains accommodated inside the protective cavity of ribosome-bound TF. The adaptability to accept nascent chains of different length and folding states may explain how TF is able to assist co-translational folding of all kinds of nascent polypeptides during ongoing synthesis. Moreover, we suggest a model of how TF's chaperoning function can be coordinated with the co-translational processing and membrane targeting of nascent polypeptides by other ribosome-associated factors.


  • Organizational Affiliation

    Zentrum für Molekulare Biologie Heidelberg, DKFZ-ZMBH Alliance, Universität Heidelberg, Heidelberg, Germany.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TRIGGER FACTOR432Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A850 (Escherichia coli (strain K12))
Explore P0A850 
Go to UniProtKB:  P0A850
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UniProt GroupP0A850
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
50S RIBOSOMAL PROTEIN L23100Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0ADZ0 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0ADZ0
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UniProt GroupP0ADZ0
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
50S RIBOSOMAL PROTEIN L24103Escherichia coliMutation(s): 0 
UniProt
Find proteins for P60624 (Escherichia coli (strain K12))
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Go to UniProtKB:  P60624
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UniProt GroupP60624
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
50S RIBOSOMAL PROTEIN L2963Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7M6 (Escherichia coli (strain K12))
Explore P0A7M6 
Go to UniProtKB:  P0A7M6
Entity Groups  
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UniProt GroupP0A7M6
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONIMAGIC5
RECONSTRUCTIONSPIDER

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-17
    Type: Initial release
  • Version 1.1: 2011-12-14
    Changes: Derived calculations, Other, Version format compliance
  • Version 1.2: 2013-08-07
    Changes: Other, Refinement description
  • Version 1.3: 2017-08-23
    Changes: Data collection, Refinement description
  • Version 1.4: 2024-05-08
    Changes: Data collection, Database references, Refinement description