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Gene Review

RPS9B  -  ribosomal 40S subunit protein S9B

Saccharomyces cerevisiae S288c

Synonyms: 40S ribosomal protein S9-B, RP21, RPS13A, RPS13B, S13, ...
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Disease relevance of RPS9B

  • Other alterations, found in the more conserved carboxyl-terminal portion, counteract SUP44- or SUP46-associated antibiotic sensitivity, mimicking E. coli results [1].

High impact information on RPS9B

  • In the eukaryotic ribosome of Saccharomyces cerevisiae, mutations in SUP46 and SUP44, encoding the proteins equivalent to S4 and S5, lead to omnipotent suppression--i.e., to less accurate translation [2].
  • The isolated proteins are YP 6, YP 7, YP 9, YP 12, YP 14', YP 14'', YP 28, YP 38, YP 45, YP 50, YP 52, YP 58, YP 63, and YP 70 [3].
  • Two of them are contiguous and represent two ribosomal protein genes: SUP46 and URP1 [4].
  • The covalent structure of the rat 40S ribosomal subunit protein S13 was deduced from the sequence of nucleotides in a recombinant cDNA and confirmed from the NH2-terminal amino acid sequence of the protein [5].
  • These suppressors, like SUP46, manifest sensitivity to increased temperature and the antibiotics paromomycin and hygromycin B [6].

Biological context of RPS9B

  • These two mutants have previously been shown to exhibit a translation termination error phenotype and the sup44+ and sup46+ genes encode the yeast ribosomal proteins S4 and S9, respectively [7].
  • At 2.5 microM CCCP or 4 microM S13, transient inhibition of oscillatory respiration (for 5 h) preceded synchronisation of the cell division cycle seen as a slow (9 h period) wave that enveloped the 48 min oscillation [8].

Associations of RPS9B with chemical compounds

  • Proteins S7, S10, S13, S21, S22 and S27 in the small subunit and L2/3, L5, L10/12, L19/20, L22, L23, L36/37, L42 and L43' in the large subunit are labelled when cross linked to [14C]spermidine using 1,5-difluoro 2,4-dinitrobenzene and are good candidates to be RNA-binding proteins in ribosomes from Saccharomyces cerevisiae [9].

Other interactions of RPS9B

  • The His195 to Tyr195 missense error assay was used to demonstrate increased frequencies of missense error at codon 195 in SUP44 and SUP46 mutants [7].


  1. Alterations in ribosomal protein RPS28 can diversely affect translational accuracy in Saccharomyces cerevisiae. Anthony, R.A., Liebman, S.W. Genetics (1995) [Pubmed]
  2. An accuracy center in the ribosome conserved over 2 billion years. Alksne, L.E., Anthony, R.A., Liebman, S.W., Warner, J.R. Proc. Natl. Acad. Sci. U.S.A. (1993) [Pubmed]
  3. Isolation and characterization of fourteen ribosomal proteins from small subunits of yeast. Higo, K., Otaka, E. Biochemistry (1979) [Pubmed]
  4. A 12.5 kb fragment of the yeast chromosome II contains two adjacent genes encoding ribosomal proteins and six putative new genes, one of which encodes a putative transcriptional factor. Démolis, N., Mallet, L., Jacquet, M. Yeast (1994) [Pubmed]
  5. The primary structure of rat ribosomal protein S13. Suzuki, K., Olvera, J., Wool, I.G. Biochem. Biophys. Res. Commun. (1990) [Pubmed]
  6. Two new loci that give rise to dominant omnipotent suppressors in Saccharomyces cerevisiae. Ono, B., Tanaka, M., Awano, I., Okamoto, F., Satoh, R., Yamagishi, N., Ishino-Arao, Y. Curr. Genet. (1989) [Pubmed]
  7. Missense translation errors in Saccharomyces cerevisiae. Stansfield, I., Jones, K.M., Herbert, P., Lewendon, A., Shaw, W.V., Tuite, M.F. J. Mol. Biol. (1998) [Pubmed]
  8. Effects of uncoupling of mitochondrial energy conservation on the ultradian clock-driven oscillations in Saccharomyces cerevisiae continuous culture. Lloyd, D. Mitochondrion (2003) [Pubmed]
  9. Structure of the yeast ribosomes. Proteins associated with the rRNA. Reyes, R., Vazquez, D., Ballesta, J.P. Biochim. Biophys. Acta (1978) [Pubmed]
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