3J5S

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

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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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
  • Primary Citation of Related Structures:  
    3J5S

  • 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 is an Escherichia coli representative of the ATP-binding cassette F (ABC-F) protein family ...

    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: 

    1] Department of Biological Sciences, Columbia University, New York, New York, USA. [2] Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York, USA.



Macromolecules

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Energy-dependent translational throttle A (EttA)D561Escherichia coli str. K-12 substr. MG1655Mutation(s): 0 
Gene Names: yjjK
EC: 3.6.1
UniProt
Find proteins for P0A9W3 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0A9W3
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UniProt GroupP0A9W3
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L1E [auth F]234Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7L0 (Escherichia coli (strain K12))
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UniProt GroupP0A7L0
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L5F [auth G]178Escherichia coliMutation(s): 0 
UniProt
Find proteins for P62399 (Escherichia coli (strain K12))
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UniProt GroupP62399
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
50S ribosomal protein L33G [auth H]50Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A7N9 (Escherichia coli (strain K12))
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UniProt GroupP0A7N9
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
30S ribosomal protein S7H [auth I]151Escherichia coliMutation(s): 0 
UniProt
Find proteins for P02359 (Escherichia coli (strain K12))
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UniProt GroupP02359
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Entity ID: 1
MoleculeChainsLengthOrganismImage
16S ribosomal RNAA [auth B]101Escherichia coli
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Entity ID: 2
MoleculeChainsLengthOrganismImage
23S ribosomal RNAB [auth A]360Escherichia coli
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Entity ID: 3
MoleculeChainsLengthOrganismImage
P-site tRNA FMetC [auth E]77Escherichia coli
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION
RECONSTRUCTIONSPIDER

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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