Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 

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Conformational variability of the N-terminal helix in the structure of ribosomal protein S15.

Clemons Jr., W.M.Davies, C.White, S.W.Ramakrishnan, V.

(1998) Structure 6: 429-438

  • DOI: https://doi.org/10.1016/s0969-2126(98)00045-8
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Ribosomal protein S15 is a primary RNA-binding protein that binds to the central domain of 16S rRNA. S15 also regulates its own synthesis by binding to its own mRNA. The binding sites for S15 on both mRNA and rRNA have been narrowed down to less than a hundred nucleotides each, making the protein an attractive candidate for the study of protein-RNA interactions. The crystal structure of S15 from Bacillus stearothermophilus has been solved to 2.1 A resolution. The structure consists of four alpha helices. Three of these helices form the core of the protein, while the N-terminal helix protrudes out from the body of the molecule to make contacts with a neighboring molecule in the crystal lattice. S15 contains a large conserved patch of basic residues which could provide a site for binding 16S rRNA. The conformation of the N-terminal alpha helix is quite different from that reported in a recent NMR structure of S15 from Thermus thermophilus. The intermolecular contacts that this alpha helix makes with a neighboring molecule in the crystal, however, closely resemble the intramolecular contacts that occur in the NMR structure. This conformational variability of the N-terminal helix has implications for the range of possible S15-RNA interactions. A large, conserved basic patch at one end of S15 and a cluster of conserved but exposed aromatic residues at the other end provide two possible RNA-binding sites on S15.

  • Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RIBOSOMAL PROTEIN S1588Geobacillus stearothermophilusMutation(s): 0 
Find proteins for P05766 (Geobacillus stearothermophilus)
Explore P05766 
Go to UniProtKB:  P05766
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05766
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.02α = 90
b = 33.75β = 90
c = 75.67γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-05-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references