3J5S

EttA binds to ribosome exit site and regulates translation by restricting ribosome and tRNA dynamics


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

EttA regulates translation by binding the ribosomal E site and restricting ribosome-tRNA dynamics.

Chen, B.Boel, G.Hashem, Y.Ning, W.Fei, J.Wang, C.Gonzalez, R.L.Hunt, J.F.Frank, J.

(2014) Nat.Struct.Mol.Biol. 21: 152-159

  • DOI: 10.1038/nsmb.2741

  • PubMed Abstract: 
  • Cells express many ribosome-interacting factors whose functions and molecular mechanisms remain unknown. Here, we elucidate the mechanism of a newly characterized regulatory translation factor, energy-dependent translational throttle A (EttA), which ...

    Cells express many ribosome-interacting factors whose functions and molecular mechanisms remain unknown. Here, we elucidate the mechanism of a newly characterized regulatory translation factor, energy-dependent translational throttle A (EttA), which is an Escherichia coli representative of the ATP-binding cassette F (ABC-F) protein family. Using cryo-EM, we demonstrate that the ATP-bound form of EttA binds to the ribosomal tRNA-exit site, where it forms bridging interactions between the ribosomal L1 stalk and the tRNA bound in the peptidyl-tRNA-binding site. Using single-molecule fluorescence resonance energy transfer, we show that the ATP-bound form of EttA restricts ribosome and tRNA dynamics required for protein synthesis. This work represents the first example, to our knowledge, in which the detailed molecular mechanism of any ABC-F family protein has been determined and establishes a framework for elucidating the mechanisms of other regulatory translation factors.


    Related Citations: 
    • The ABC-F protein EttA gates ribosome entry into the translation elongation cycle.
      Boel, G.,Smith, P.C.,Ning, W.,Englander, M.T.,Chen, B.,Hashem, Y.,Testa, A.J.,Fischer, J.J.,Wieden, H.J.,Frank, J.,Gonzalez, R.L.,Hunt, J.F.
      (2014) Nat.Struct.Mol.Biol. --: --


    Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Energy-dependent translational throttle A (EttA)
D
561Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ettA (yjjK)
Find proteins for P0A9W3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9W3
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
50S ribosomal protein L1
F
234Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rplA
Find proteins for P0A7L0 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7L0
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
50S ribosomal protein L5
G
178Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rplE
Find proteins for P62399 (Escherichia coli (strain K12))
Go to UniProtKB:  P62399
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
50S ribosomal protein L33
H
50Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpmG
Find proteins for P0A7N9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7N9
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
30S ribosomal protein S7
I
151Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: rpsG
Find proteins for P02359 (Escherichia coli (strain K12))
Go to UniProtKB:  P02359
Entity ID: 1
MoleculeChainsLengthOrganism
16S ribosomal RNAB101Escherichia coli
Entity ID: 2
MoleculeChainsLengthOrganism
23S ribosomal RNAA360Escherichia coli
Entity ID: 3
MoleculeChainsLengthOrganism
P-site tRNA FMetE77Escherichia coli
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-11-15 
  • Released Date: 2014-01-08 
  • Deposition Author(s): Hashem, Y.

Revision History 

  • Version 1.0: 2014-01-08
    Type: Initial release
  • Version 1.1: 2014-01-22
    Type: Database references
  • Version 1.2: 2014-02-19
    Type: Database references
  • Version 1.3: 2018-07-18
    Type: Data collection