5IW7

Crystal structure of yeast Tsr1, a pre-40S ribosome synthesis factor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Pre-40S ribosome biogenesis factor Tsr1 is an inactive structural mimic of translational GTPases.

McCaughan, U.M., Jayachandran, U., Shchepachev, V., Chen, Z.A., Rappsilber, J., Tollervey, D., Cook, A.G.

(2016) Nat Commun 7: 11789-11789

  • DOI: 10.1038/ncomms11789

  • PubMed Abstract: 

    • Budding yeast Tsr1 is a ribosome biogenesis factor with sequence similarity to GTPases, which is essential for cytoplasmic steps in 40S subunit maturation. Here we present the crystal structure of Tsr1 at 3.6 Å. Tsr1 has a similar domain architecture ...

    Budding yeast Tsr1 is a ribosome biogenesis factor with sequence similarity to GTPases, which is essential for cytoplasmic steps in 40S subunit maturation. Here we present the crystal structure of Tsr1 at 3.6 Å. Tsr1 has a similar domain architecture to translational GTPases such as EF-Tu and the selenocysteine incorporation factor SelB. However, active site residues required for GTP binding and hydrolysis are absent, explaining the lack of enzymatic activity in previous analyses. Modelling of Tsr1 into cryo-electron microscopy maps of pre-40S particles shows that a highly acidic surface of Tsr1 is presented on the outside of pre-40S particles, potentially preventing premature binding to 60S subunits. Late pre-40S maturation also requires the GTPase eIF5B and the ATPase Rio1. The location of Tsr1 is predicted to block binding by both factors, strongly indicating that removal of Tsr1 is an essential step during cytoplasmic maturation of 40S ribosomal subunits.

    Organizational Affiliation: 

    Wellcome Trust Centre for Cell Biology, University of Edinburgh, Michael Swann Building, Max Born Crescent, Edinburgh EH9 3BF, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribosome biogenesis protein TSR1,Ribosome biogenesis protein TSR1
A, B, C, D
704Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: TSR1
Find proteins for Q07381 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: TSR1
Go to UniProtKB:  Q07381
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.268 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.687α = 90.00
b = 174.199β = 90.00
c = 320.474γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing
PHENIXphasing
autoSHARPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomG1000520/1
Wellcome TrustUnited Kingdom092076
Wellcome TrustUnited Kingdom093851

Revision History 

  • Version 1.0: 2016-06-15
    Type: Initial release
  • Version 1.1: 2017-09-13
    Type: Author supporting evidence
  • Version 1.2: 2017-09-20
    Type: Database references