8C83

Cryo-EM structure of in vitro reconstituted Otu2-bound Ub-40S complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Literature

Molecular basis for recognition and deubiquitination of 40S ribosomes by Otu2.

Ikeuchi, K.Ivic, N.Buschauer, R.Cheng, J.Frohlich, T.Matsuo, Y.Berninghausen, O.Inada, T.Becker, T.Beckmann, R.

(2023) Nat Commun 14: 2730-2730

  • DOI: https://doi.org/10.1038/s41467-023-38161-w
  • Primary Citation of Related Structures:  
    8C83, 8CAH, 8CAS, 8CBJ

  • PubMed Abstract: 

    In actively translating 80S ribosomes the ribosomal protein eS7 of the 40S subunit is monoubiquitinated by the E3 ligase Not4 and deubiquitinated by Otu2 upon ribosomal subunit recycling. Despite its importance for translation efficiency the exact role and structural basis for this translational reset is poorly understood. Here, structural analysis by cryo-electron microscopy of native and reconstituted Otu2-bound ribosomal complexes reveals that Otu2 engages 40S subunits mainly between ribosome recycling and initiation stages. Otu2 binds to several sites on the intersubunit surface of the 40S that are not occupied by any other 40S-binding factors. This binding mode explains the discrimination against 80S ribosomes via the largely helical N-terminal domain of Otu2 as well as the specificity for mono-ubiquitinated eS7 on 40S. Collectively, this study reveals mechanistic insights into the Otu2-driven deubiquitination steps for translational reset during ribosome recycling/(re)initiation.


  • Organizational Affiliation

    Department of Biochemistry, Gene Center, Feodor-Lynen-Str. 25, University of Munich, 81377, Munich, Germany.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
OTU domain-containing protein 2A [auth x]307Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: OTU2YHL013C
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
UbiquitinB [auth y]76Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: RPS31RPS37UBI3YLR167WL9470.14
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S0-AD [auth P]252Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S2E [auth R]254Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S4-AF [auth S]261Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S6-AG [auth T]236Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S7-AH [auth U]190Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S8-BI [auth V]200Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S9-AJ [auth W]197Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S11-AK [auth X]156Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S13L [auth Y]151Saccharomyces 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 S27-AQ [auth f]82Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S30-AR [auth g]63Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanySFB/TRR-174
German Research Foundation (DFG)GermanyBE1814/15-1
German Research Foundation (DFG)GermanyBE1814/1-1
Japan Society for the Promotion of Science (JSPS)Japan--
Boehringer Ingelheim Fonds (BIF)Germany--

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-24
    Type: Initial release
  • Version 1.1: 2024-07-24
    Changes: Data collection