UniProt:P05750 RPS3

chain
  • initiator methionine:1
  • chain:2-240
checksum B85C0DFEB011745F
comment
  • FUNCTION Component of the ribosome, a large ribonucleoprotein complex responsible for the synthesis of proteins in the cell. The small ribosomal subunit (SSU) binds messenger RNAs (mRNAs) and translates the encoded message by selecting cognate aminoacyl-transfer RNA (tRNA) molecules. The large subunit (LSU) contains the ribosomal catalytic site termed the peptidyl transferase center (PTC), which catalyzes the formation of peptide bonds, thereby polymerizing the amino acids delivered by tRNAs into a polypeptide chain. The nascent polypeptides leave the ribosome through a tunnel in the LSU and interact with protein factors that function in enzymatic processing, targeting, and the membrane insertion of nascent chains at the exit of the ribosomal tunnel.SUBUNIT Component of the small ribosomal subunit (SSU). Mature yeast ribosomes consist of a small (40S) and a large (60S) subunit. The 40S small subunit contains 1 molecule of ribosomal RNA (18S rRNA) and 33 different proteins (encoded by 57 genes). The large 60S subunit contains 3 rRNA molecules (25S, 5.8S and 5S rRNA) and 46 different proteins (encoded by 81 genes) (PubMed:22096102, PubMed:9559554).INTERACTION Ubiquitinated at Lys-212 in response to stalled ribosomes (PubMed:28757607, PubMed:28943311, PubMed:30718516, PubMed:30893611, PubMed:31819057). Ubiquitination leads to activation of the No-Go Decay (NGD) pathway and degradation of non-functional 18S rRNA: first monoubiquitinated at Lys-212 by MAG2, followed by formation of 'Lys-63'-linked polyubiquitin chains on monoubiquitin by HEL2 and RSP5 (PubMed:30893611).MASS SPECTROMETRY The measured mass is that of the monomethylated protein.MISCELLANEOUS Present with 146000 molecules/cell in log phase SD medium.SIMILARITY Belongs to the universal ribosomal protein uS3 family.
crossReference
databaseName UniProt
dbId 100722
description
  • recommendedName: fullName evidence="15"Small ribosomal subunit protein uS3 alternativeName: fullName evidence="16"40S ribosomal protein S3 alternativeName: fullName evidence="16"RP13 alternativeName: fullName evidence="16"YS3
displayName UniProt:P05750 RPS3
geneName
  • RPS3
  • SUF14
  • YNL178W
  • N1653
identifier P05750
isSequenceChanged false
keyword
  • 3D-structure
  • Cytoplasm
  • Direct protein sequencing
  • Isopeptide bond
  • Methylation
  • Phosphoprotein
  • Reference proteome
  • Ribonucleoprotein
  • Ribosomal protein
  • RNA-binding
  • Ubl conjugation
modified [InstanceEdit:9963647] Weiser, Joel, 2025-08-15
moleculeType Protein
name
  • RPS3
otherIdentifier
  • 855543
  • GO:0000054
  • GO:0000056
  • GO:0002181
  • GO:0003723
  • GO:0003735
  • GO:0003906
  • GO:0005198
  • GO:0005515
  • GO:0005575
  • GO:0005634
  • GO:0005737
  • GO:0005829
  • GO:0005840
  • GO:0006259
  • GO:0006401
  • GO:0006407
  • GO:0006412
  • GO:0008150
  • GO:0015935
  • GO:0019899
  • GO:0022626
  • GO:0022627
  • GO:0030686
  • GO:0030688
  • GO:0034236
  • GO:0051169
  • GO:0070651
  • GO:1990145
  • GO:1990904
physicalEntity
referenceDatabase [ReferenceDatabase:2] UniProt
referenceGene
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • RS3_YEAST
  • D6W107
sequenceLength 240
species [Species:68322] Saccharomyces cerevisiae
stId uniprot:P05750
url http://purl.uniprot.org/uniprot/P05750
Cite Us!