7WTM

Cryo-EM structure of a yeast pre-40S ribosomal subunit - State Dis-E


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

In vitro structural maturation of an early stage pre-40S particle coupled with U3 snoRNA release and central pseudoknot formation.

Cheng, J.La Venuta, G.Lau, B.Berninghausen, O.Beckmann, R.Hurt, E.

(2022) Nucleic Acids Res 50: 11916-11923

  • DOI: https://doi.org/10.1093/nar/gkac910
  • Primary Citation of Related Structures:  
    7WTL, 7WTM

  • PubMed Abstract: 

    The transition of the 90S to the pre-40S pre-ribosome is a decisive step in eukaryotic small subunit biogenesis leading to a first pre-40S intermediate (state Dis-C or primordial pre-40S), where the U3 snoRNA keeps the nascent 18S rRNA locally immature. We in vitro reconstitute the ATP-dependent U3 release from this particle, catalyzed by the helicase Dhr1, and follow this process by cryo-EM revealing two successive pre-40S intermediates, Dis-D and Dis-E. The latter has lost not only U3 but all residual 90S factors including the GTPase Bms1. In vitro remodeling likewise induced the formation of the central pseudoknot, a universally conserved tertiary RNA structure that comprises the core of the small subunit decoding center. Thus, we could structurally reveal a key tertiary RNA folding step that is essential to form the active 40S subunit.


  • Organizational Affiliation

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


Macromolecules

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S1-AB [auth SB]255Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S4-AC [auth SE]261Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S6-AD [auth SG]236Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S7-AE [auth SH]190Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S8-AF [auth SI]200Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S9-AG [auth SJ]197Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S11-AH [auth SL]156Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S13I [auth SN]151Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S14-AJ [auth SO]137Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S22-AK [auth SW]130Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S23-AL [auth SX]145Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S24-AM [auth SY]135Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S27-AN [auth Sb]82Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
40S ribosomal protein S30-AO [auth Se]63Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
Pre-rRNA-processing protein PNO1P [auth CA]274Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Dimethyladenosine transferaseQ [auth JL]318Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.1.1.183
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Entity ID: 1
MoleculeChains LengthOrganismImage
18S rRNAA [auth C2]1,800Saccharomyces cerevisiae
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Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
R [auth Sb]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2022-10-19
    Type: Initial release
  • Version 1.1: 2022-11-09
    Changes: Database references
  • Version 1.2: 2022-12-21
    Changes: Database references