ribosome

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Related to ribosomal: ribosomal RNA, Ribosomal DNA, Ribosomal proteins

ribosome

 [ri´bo-sōm]
any of the intracellular ribonucleoprotein organelles concerned with protein synthesis, found either bound to cell membranes or free in the cytoplasm. They may occur singly or in clusters (polyribosomes). The genetic code is translated when ribosomes attach to messenger RNA.

ri·bo·some

(rī'bō-sōm),
A granule of ribonucleoprotein, 120-200 Ǻ in diameter, that is the site of protein synthesis from aminoacyl-tRNAs as directed by mRNAs.
Synonym(s): Palade granule

ribosome

/ri·bo·some/ (ri´bo-sōm) any of the intracellular ribonucleoprotein particles concerned with protein synthesis; they consist of reversibly dissociable units and are found either bound to cell membranes or free in the cytoplasm. They may occur singly or occur in clusters (polyribosomes).riboso´mal

ribosome

(rī′bə-sōm′)
n.
A structure composed of RNA and protein, present in large numbers in the cytoplasm of living cells and serving as the site for assembly of polypeptides encoded by messenger RNA.

ri′bo·so′mal (-sō′məl) adj.

ribosome

[rī′bəsōm]
Etymology: ribose + Gk, soma, body
an organelle composed of RNA and protein that functions in the synthesis of protein. Ribosomes interact with messenger RNA and transfer RNA to link amino acid into a polypeptide chain in a sequence determined by the sequence of nucleotides in the messenger RNA. Ribosomes may exist singly, in clusters as polysomes, or attached to the "rough" endoplasmic reticulum. See also translation.
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Ribosome

ri·bo·some

(rī'bŏ-sōm)
A granule of ribonucleoprotein, 120-150 Å in diameter, which is the site of protein synthesis from aminoacyl-tRNAs as directed by mRNAs.

ribosome

A spherical cell ORGANELLE made of RNA and protein which is the site of protein synthesis in the cell by linking amino acids into chains. Ribosomes may be free or may be attached to the endoplasmic reticulum. During translation, ribosomes attach to MESSENGER RNA molecules and travel along them, synthesizing polypeptides as they go.

ribosome

a small particle (not an ORGANELLE) found in the cytoplasm of all cells, composed of protein and RIBOSOMAL RNA. Each ribosome is composed of two subunits of different sizes which sediment at different rates during centrifugation (see ULTRACENTRIFUGE). PROKARYOTES have ribosome with 70 S size and mass; EUKARYOTES have larger ribosomes with 80 S size and mass. Ribosomes bind to the 5′ end of MESSENGER RNA (see POLYNUCLEOTIDE CHAIN) and travel towards the 3′ end, with TRANSLATION and POLYPEPTIDE synthesis occurring as they go along. Frequently several ribosomes are attached to one piece of mRNA, forming a POLYRIBOSOME.

Palade,

George Emil, Romanian-U.S. cell biologist and Nobel laureate, 1912–.
Palade granule - a granule of ribonucleoprotein, the site of protein synthesis from aminoacyl-tRNAs as directed by mRNAs. Synonym(s): ribosome
Weibel-Palade bodies - see under Weibel

ribosome

cell organelle; granule formed of ribonucleoprotein; site of protein synthesis, under influence of nuclear m-RNA

ribosome

ribonucleoprotein particles concerned with protein synthesis; they consist of two, one large and one small, reversibly dissociable units (called also 50S and 30S subunits) that are found either bound to cell membranes, particularly rough endoplasmic reticulum, or free in the cytoplasm. They may occur singly or in clusters, called polyribosomes or polysomes, which are ribosomes linked by mRNA and are actively engaged in protein synthesis.

ribosome binding site
a nucleotide sequence near the 5′ terminus of mRNA required for binding of mRNA to the small ribosomal subunit. Called also Shine-Dalgarno sequence.
References in periodicals archive ?
What happens next provides clues to how oak wood extracts, with their ribosomal support properties, may help fight chronic fatigue syndrome.
The RPS23 belongs to the ribosomal protein family, known as S12 in bacteria and as either S12 or S23 in Archaea (Kitaoka et al.
VIO has been shown to bind both the 30S and 50S ribosome subunits and to inhibit ribosomal translocation by interference with the peptidyl tRNA acceptor site [13,14].
Novel ribosomal mutations in Staphylococcus aureus strains identified through selection with the oxazolidinones linezolid and torezolid (TR-700).
S6 was the first identified member of the p70 ribosomal S6 kinase (S6K) substrates family, and its phosphorylation has been studied thoroughly at the structural, kinetic and functional level.
1 Bacillus cereus strain D3-1 16S ribosomal RNA gene, partial sequence 3 HQ844470.
Ribosomal DNA (rDNA) has both fast- and slow-evolving regions, and is particularly useful to infer taxonomic and phylogenetic relationships in bivalves (Mindell & Honeycutt 1990).
Use of subgenic 18S ribosomal DNA PCR and sequencing for genus and genotype identification of acanthamoebae from humans with keratitis and from sewage sludge.
Almost every biology textbook now describes the structure of DNA and the roles of messenger RNAs, transfer RNAs, and ribosomal RNAs in protein synthesis.
Phylogenetic analysis using combined nuclear ribosomal Internally Transcribed Spacer 2 and large ribosomal subunit 26S rRNA gene DNA sequences suggest that the two disjuncts are not phylogenetically distinct from each other.
Inside of cells are three major types of RNA: transfer RNA to decode DNA, messenger RNA that is a temporary copy of genes, and ribosomal RNA to trigger protein synthesis.