UniProt functional annotation for P07280

UniProt code: P07280.

Organism: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast).
Taxonomy: Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes; Saccharomycetales; Saccharomycetaceae; Saccharomyces.
 
Function: Required for proper maturation of the small (40S) ribosomal subunit. Binds to 40s pre-ribosomal particles, probably required after association of NOC4 but before association of ENP1, TSR1 and RIO2 with 20/21S pre-rRNA.
 
Subunit: Component of the small ribosomal subunit. Mature ribosomes consist of a small (40S) and a large (60S) subunit. The 40S subunit contains 32 different proteins (encoded by 56 genes) and 1 molecule of RNA (18S). The 60S subunit contains 46 different proteins (encoded by 81 genes) and 3 molecules of RNA (25S, 5.8S and 5S).
Subcellular location: Cytoplasm.
Disruption phenotype: Disruption of a single RPS19 gene reduces cell growth; a double disruption is lethal. Depletion experiments show the proteins are required for correct maturation of precursor rRNA to generate the 18S small rRNA. A specific site between the 18S and 5.8S precursors (site A2 in ETS1) is not cleaved in disruption mutants. Partially assembled ribosomes are retained in the nucleolus rather than being exported to the cytoplasm. All effects are exacerbated in the double disruption. Increases association of NOC4 with 20S/21S pre-rRNA, decreases association of ENP1, TSR1 and RIO2 with 20S/21S pre-rRNA.
Miscellaneous: Present with 29000 molecules/cell in log phase SD medium.
Miscellaneous: There are 2 genes for S19 in yeast.
Similarity: Belongs to the ribosomal protein S19e family.

Annotations taken from UniProtKB at the EBI.