Crystal structure of Rsa4 from Chaetomium thermophilum

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.168 

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This is version 1.3 of the entry. See complete history


A network of assembly factors is involved in remodeling rRNA elements during preribosome maturation.

Baler, J.Paternoga, H.Holdermann, I.Thoms, M.Granneman, S.Barrio-Garcia, C.Nyarko, A.Stier, G.Clark, S.A.Schraivogel, D.Kallas, M.Beckmann, R.Tollervey, D.Barbar, E.Sinning, I.Hurt, E.

(2014) J Cell Biol 207: 481-498

  • DOI: https://doi.org/10.1083/jcb.201408111
  • Primary Citation of Related Structures:  
    2MVF, 4WJS, 4WJU, 4WJV

  • PubMed Abstract: 

    Eukaryotic ribosome biogenesis involves ∼200 assembly factors, but how these contribute to ribosome maturation is poorly understood. Here, we identify a network of factors on the nascent 60S subunit that actively remodels preribosome structure. At its hub is Rsa4, a direct substrate of the force-generating ATPase Rea1. We show that Rsa4 is connected to the central protuberance by binding to Rpl5 and to ribosomal RNA (rRNA) helix 89 of the nascent peptidyl transferase center (PTC) through Nsa2. Importantly, Nsa2 binds to helix 89 before relocation of helix 89 to the PTC. Structure-based mutations of these factors reveal the functional importance of their interactions for ribosome assembly. Thus, Rsa4 is held tightly in the preribosome and can serve as a "distribution box," transmitting remodeling energy from Rea1 into the developing ribosome. We suggest that a relay-like factor network coupled to a mechano-enzyme is strategically positioned to relocate rRNA elements during ribosome maturation.

  • Organizational Affiliation

    Biochemistry Center of Heidelberg University, INF328, D-69120 Heidelberg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Rsa4485Thermochaetoides thermophilaMutation(s): 0 
Gene Names: CTHT_0055700
Find proteins for G0SC29 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SC29 
Go to UniProtKB:  G0SC29
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG0SC29
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.168 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.155α = 67.47
b = 48.832β = 88.39
c = 58.625γ = 62.65
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-11-19
    Type: Initial release
  • Version 1.1: 2014-12-03
    Changes: Database references
  • Version 1.2: 2014-12-10
    Changes: Database references
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Refinement description