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

NIF_Subcellular:sao1429207766
Wikipedia:Ribosome

Ontology

GO: Cellular Component QuickGO AmiGO

Relationships

has parts: ribosomal subunit

ribosomal subunit Show first 5 Terms
is a type of: intracellular membraneless organelle

intracellular membraneless organelle Show first 5 Terms
has subtype: chloroplast ribosome cytosolic ribosome mitochondrial ribosome organellar ribosome plastid ribosome

chloroplast ribosome cytosolic ribosome mitochondrial ribosome organellar ribosome plastid ribosome Show first 5 Terms
inverse has_part: enucleated reticulocyte

enucleated reticulocyte Show first 5 Terms
inverse lacks_part: erythrocyte

erythrocyte Show first 5 Terms
inverse occurs_in: structural constituent of ribosome

structural constituent of ribosome Show first 5 Terms

Phenotype

Phenotype caused by Genes