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GO:0005634
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nucleus
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A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent. |
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GO:0005622
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intracellular
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The living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm. |
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GO:0043231
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intracellular membrane-bounded organelle
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Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane and occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane. |
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GO:0030529
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intracellular ribonucleoprotein complex
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An intracellular macromolecular complex containing both protein and RNA molecules. |
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GO:0046540
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U4/U6 x U5 tri-snRNP complex
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A ribonucleoprotein complex formed by the association of the U4/U6 and U5 small nuclear ribonucleoproteins. |
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GO:0030532
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small nuclear ribonucleoprotein complex
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A complex composed of RNA of the small nuclear RNA (snRNA) class and protein, found in the nucleus of a eukaryotic cell. These are typically named after the snRNA(s) they contain, e.g. U1 snRNP or U4/U6 snRNP. Many, but not all, of these complexes are involved in splicing of nuclear mRNAs. |
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GO:1990904
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ribonucleoprotein complex
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A macromolecular complex containing both protein and RNA molecules. |
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GO:0005682
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U5 snRNP
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A ribonucleoprotein complex that contains small nuclear RNA U5. |
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GO:0044464
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cell part
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Any constituent part of a cell, the basic structural and functional unit of all organisms. |
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GO:0044424
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intracellular part
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Any constituent part of the living contents of a cell; the matter contained within (but not including) the plasma membrane, usually taken to exclude large vacuoles and masses of secretory or ingested material. In eukaryotes it includes the nucleus and cytoplasm. |
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GO:0032991
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macromolecular complex
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A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which the constituent parts function together. |
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GO:0005575
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cellular_component
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The part of a cell or its extracellular environment in which a gene product is located. A gene product may be located in one or more parts of a cell and its location may be as specific as a particular macromolecular complex, that is, a stable, persistent association of macromolecules that function together. |
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GO:0005623
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cell
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The basic structural and functional unit of all organisms. Includes the plasma membrane and any external encapsulating structures such as the cell wall and cell envelope. |
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GO:0044428
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nuclear part
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Any constituent part of the nucleus, a membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. |
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GO:0043227
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membrane-bounded organelle
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Organized structure of distinctive morphology and function, bounded by a single or double lipid bilayer membrane. Includes the nucleus, mitochondria, plastids, vacuoles, and vesicles. Excludes the plasma membrane. |
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GO:0043226
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organelle
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Organized structure of distinctive morphology and function. Includes the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton, and prokaryotic structures such as anammoxosomes and pirellulosomes. Excludes the plasma membrane. |
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GO:0043229
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intracellular organelle
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Organized structure of distinctive morphology and function, occurring within the cell. Includes the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton. Excludes the plasma membrane. |
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GO:0044422
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organelle part
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Any constituent part of an organelle, an organized structure of distinctive morphology and function. Includes constituent parts of the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton, but excludes the plasma membrane. |
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GO:0044446
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intracellular organelle part
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A constituent part of an intracellular organelle, an organized structure of distinctive morphology and function, occurring within the cell. Includes constituent parts of the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton but excludes the plasma membrane. |
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GO:0097525
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spliceosomal snRNP complex
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A ribonucleoprotein complex involved in formation of the spliceosome and composed of one or more snRNA and multiple protein components. |
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GO:0005687
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U4 snRNP
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A ribonucleoprotein complex that contains small nuclear RNA U4. |
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GO:0005688
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U6 snRNP
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A ribonucleoprotein complex that contains small nuclear RNA U6. |
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GO:0071001
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U4/U6 snRNP
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A ribonucleoprotein complex that contains base-paired U4 and U6 small nuclear RNAs. |
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GO:0097526
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spliceosomal tri-snRNP complex
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A spliceosomal snRNP complex containing U4 and U6 (or U4atac and U6atac) snRNAs and U5 snRNAs and associated proteins. |
