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Nucleolus

Name: Nucleolus
Description: A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome (Gene Ontology).
Is part of: Nucleus
Super-category: Nuclear Subcomponent
Id: GO:0005730
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  • Example: nucleoli_sw_512x512.jpg

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Facts about NucleolusRDF feed
CurationStatusuncurated  +
DefinitionA small, dense body one or more of which a A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome (Gene Ontology). subunits of the ribosome (Gene Ontology).
Examplehttp://ccdb.ucsd.edu/SAO/images/nucleoli_sw_512x512.jpg  +
IdGO:0005730  +
Is part ofNucleus  +
LabelNucleolus  +
ModifiedDate26 July 2013  +
SuperCategoryNuclear Subcomponent  +