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Gene Review

RPS14B  -  ribosomal 40S subunit protein S14B

Saccharomyces cerevisiae S288c

Synonyms: 40S ribosomal protein S14-B, CRY2, J0354, RP59B, YJL191W
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Disease relevance of RPS14B


High impact information on RPS14B

  • Production of ribosomal protein S14 in Saccharomyces cerevisiae is coordinated with the rate of ribosome assembly by a feedback mechanism that represses expression of RPS14B [3].
  • Deletion or inactivation of CRY1 leads to 5- to 10-fold-increased levels of CRY2 mRNA [4].
  • Increased levels of CRY2 pre-mRNA are present in mtr mutants, defective in mRNA transport, and in upf1 mutants, defective in degradation of cytoplasmic RNA, suggesting that in wild-type repressed cells, unspliced CRY2 pre-mRNA is degraded in the cytoplasm [4].
  • Feedback inhibition of the yeast ribosomal protein gene CRY2 is mediated by the nucleotide sequence and secondary structure of CRY2 pre-mRNA [4].
  • Analysis of CRY2 point mutations corroborates these results and indicates that both the secondary structure and sequence of the regulatory region of CRY2 pre-mRNA are necessary for repression [4].

Biological context of RPS14B

  • Transformation of these CryR yeast with CRY2 on a low copy CEN plasmid does not confer a CryS phenotype [1].
  • Ribosomal protein 59 is an essential protein; upon sporulation of a diploid doubly heterozygous for cry1-delta 2::TRP1 cry2-delta 1::LEU2 null alleles, no spore clones containing both null alleles were recovered [1].
  • (2) Haploids containing the cry1-delta 2::TRP1 null allele have a deficit of 40S ribosomal subunits, but cry2-delta 1::LEU2 strains have wild-type amounts of 40S ribosomal subunits [1].

Analytical, diagnostic and therapeutic context of RPS14B

  • Expression was confirmed by Northern-blot analysis of 2.0 kb transcripts, obtained from clones induced for RNA transcripts, which hybridized with a [(32)P]dCTP-labelled probe prepared from a 641 bp fragment of restriction-endonuclease- Hae II-digested PCR product of the cry2 gene [2].


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