5LL6

Structure of the 40S ABCE1 post-splitting complex in ribosome recycling and translation initiation


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history


Literature

Structure of the 40S-ABCE1 post-splitting complex in ribosome recycling and translation initiation.

Heuer, A.Gerovac, M.Schmidt, C.Trowitzsch, S.Preis, A.Kotter, P.Berninghausen, O.Becker, T.Beckmann, R.Tampe, R.

(2017) Nat Struct Mol Biol 24: 453-460

  • DOI: https://doi.org/10.1038/nsmb.3396
  • Primary Citation of Related Structures:  
    5LL6

  • PubMed Abstract: 

    The essential ATP-binding cassette protein ABCE1 splits 80S ribosomes into 60S and 40S subunits after canonical termination or quality-control-based mRNA surveillance processes. However, the underlying splitting mechanism remains enigmatic. Here, we present a cryo-EM structure of the yeast 40S-ABCE1 post-splitting complex at 3.9-Å resolution. Compared to the pre-splitting state, we observe repositioning of ABCE1's iron-sulfur cluster domain, which rotates 150° into a binding pocket on the 40S subunit. This repositioning explains a newly observed anti-association activity of ABCE1. Notably, the movement implies a collision with A-site factors, thus explaining the splitting mechanism. Disruption of key interactions in the post-splitting complex impairs cellular homeostasis. Additionally, the structure of a native post-splitting complex reveals ABCE1 to be part of the 43S initiation complex, suggesting a coordination of termination, recycling, and initiation.


  • Organizational Affiliation

    Gene Center and Center of Integrated Protein Science Munich, Department of Biochemistry, University of Munich, Munich, Germany.


Macromolecules

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S0-AB [auth P]252Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S1-AC [auth Q]255Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S2D [auth R]254Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S4-AE [auth S]261Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S6-AF [auth T]236Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S7-AG [auth U]190Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S8-AH [auth V]200Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S9-AI [auth W]197Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S11-AJ [auth X]156Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S13K [auth Y]151Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S14-AL [auth Z]137Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S21-AM [auth a]87Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S22-AN [auth b]130Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S23-AO [auth c]145Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S24-AP [auth d]135Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S26-AQ [auth e]119Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S27-AR [auth f]82Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S30-AS [auth g]63Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 20
MoleculeChains Sequence LengthOrganismDetailsImage
Translation initiation factor RLI1T [auth h]608Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 1
MoleculeChains LengthOrganismImage
18S ribosomal RNAA [auth 2]1,798Saccharomyces cerevisiae
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.0
MODEL REFINEMENTPHENIX
MODEL REFINEMENTREFMAC

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-12
    Type: Initial release
  • Version 1.1: 2017-05-17
    Changes: Database references
  • Version 1.2: 2017-08-30
    Changes: Data collection
  • Version 1.3: 2018-11-21
    Changes: Advisory, Data collection, Derived calculations