Search Ontology:
GO: Cellular Component

ribosome

Term ID
GO:0005840
Synonyms
  • free ribosome
  • membrane bound ribosome
  • ribosomal RNA
Definition
An intracellular organelle, about 200 A in diameter, consisting of RNA and protein. It is the site of protein biosynthesis resulting from translation of messenger RNA (mRNA). It consists of two subunits, one large and one small, each containing only protein and RNA. Both the ribosome and its subunits are characterized by their sedimentation coefficients, expressed in Svedberg units (symbol: S). Hence, the prokaryotic ribosome (70S) comprises a large (50S) subunit and a small (30S) subunit, while the eukaryotic ribosome (80S) comprises a large (60S) subunit and a small (40S) subunit. Two sites on the ribosomal large subunit are involved in translation, namely the aminoacyl site (A site) and peptidyl site (P site). Ribosomes from prokaryotes, eukaryotes, mitochondria, and chloroplasts have characteristically distinct ribosomal proteins. 0198506732
References
Ontology
GO: Cellular Component    QuickGO    AmiGO
Relationships
has parts
is a type of
has subtype
inverse has_part
inverse lacks_part
inverse occurs_in
Phenotype
Phenotype caused by Genes