| GO term | GO name | GO namespace | GO def |
| GO:0006376 | mRNA splice site selection | biological_process | Selection of a splice site by components of the assembling spliceosome. [GOC:krc, ISBN:0879695897] |
| GO:0005686 | U2 snRNP | cellular_component | A ribonucleoprotein complex that contains small nuclear RNA U2, a heptameric ring of Sm proteins, as well as several proteins that are unique to the U2 snRNP, most of which remain associated with the U2 snRNA both while the U2 snRNP is free or assembled into a series of spliceosomal complexes. [GOC:krc, GOC:mah, ISBN:0879695897] |
| GO:1990904 | ribonucleoprotein complex | cellular_component | A macromolecular complex that contains both RNA and protein molecules. [GOC:krc, GOC:vesicles] |
| GO:0006397 | mRNA processing | biological_process | Any process involved in the conversion of a primary mRNA transcript into one or more mature mRNA(s) prior to translation into polypeptide. [GOC:mah] |
| GO:0005634 | nucleus | cellular_component | 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. [GOC:go_curators] |
| GO:0000398 | mRNA splicing, via spliceosome | biological_process | The joining together of exons from one or more primary transcripts of messenger RNA (mRNA) and the excision of intron sequences, via a spliceosomal mechanism, so that mRNA consisting only of the joined exons is produced. [GOC:krc, ISBN:0198506732, ISBN:0879695897] |
| GO:0065003 | protein-containing complex assembly | biological_process | The aggregation, arrangement and bonding together of a set of macromolecules to form a protein-containing complex. [GOC:jl] |
| GO:0009987 | cellular process | biological_process | Any process that is carried out at the cellular level, but not necessarily restricted to a single cell. For example, cell communication occurs among more than one cell, but occurs at the cellular level. [GOC:go_curators, GOC:isa_complete] |
| GO:0043933 | protein-containing complex organization | biological_process | Any process in which macromolecules aggregate, disaggregate, or are modified, resulting in the formation, disassembly, or alteration of a protein complex. [GOC:mah] |
| GO:0032991 | protein-containing complex | cellular_component | A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together. [GOC:dos, GOC:mah] |
| GO:0003723 | RNA binding | molecular_function | Binding to an RNA molecule or a portion thereof. [GOC:jl, GOC:mah] |
| GO:0071840 | cellular component organization or biogenesis | biological_process | A process that results in the biosynthesis of constituent macromolecules, assembly, arrangement of constituent parts, or disassembly of a cellular component. [GOC:mah] |
| GO:0005681 | spliceosomal complex | cellular_component | Any of a series of ribonucleoprotein complexes that contain snRNA(s) and small nuclear ribonucleoproteins (snRNPs), and are formed sequentially during the spliceosomal splicing of one or more substrate RNAs, and which also contain the RNA substrate(s) from the initial target RNAs of splicing, the splicing intermediate RNA(s), to the final RNA products. During cis-splicing, the initial target RNA is a single, contiguous RNA transcript, whether mRNA, snoRNA, etc., and the released products are a spliced RNA and an excised intron, generally as a lariat structure. During trans-splicing, there are two initial substrate RNAs, the spliced leader RNA and a pre-mRNA. [GOC:editors, GOC:mah, ISBN:0198547684, PMID:19239890] |
| GO:0071826 | ribonucleoprotein complex subunit organization | biological_process | Any process in which macromolecules aggregate, disaggregate, or are modified, resulting in the formation, disassembly, or alteration of a ribonucleoprotein complex. [GOC:mah] |
| GO:0000375 | RNA splicing, via transesterification reactions | biological_process | Splicing of RNA via a series of two transesterification reactions. [GOC:krc] |
| GO:0005515 | protein binding | molecular_function | Binding to a protein. [GOC:go_curators] |
| GO:0005684 | U2-type spliceosomal complex | cellular_component | Any spliceosomal complex that forms during the splicing of a messenger RNA primary transcript to excise an intron that has canonical consensus sequences near the 5' and 3' ends. [GOC:krc, GOC:mah, PMID:11343900] |
| GO:0000245 | spliceosomal complex assembly | biological_process | The aggregation, arrangement and bonding together of a spliceosomal complex, a ribonucleoprotein apparatus that catalyzes nuclear mRNA splicing via transesterification reactions. [PMID:9476892] |
| GO:0016607 | nuclear speck | cellular_component | A discrete extra-nucleolar subnuclear domain, 20-50 in number, in which splicing factors are seen to be localized by immunofluorescence microscopy. [http://www.cellnucleus.com/] |
| GO:0071013 | catalytic step 2 spliceosome | cellular_component | A spliceosomal complex that contains three snRNPs, including U5, bound to a splicing intermediate in which the first catalytic cleavage of the 5' splice site has occurred. The precise subunit composition differs significantly from that of the catalytic step 1, or activated, spliceosome, and includes many proteins in addition to those found in the associated snRNPs. [GOC:ab, GOC:krc, GOC:mah, ISBN:0879695897, ISBN:0879697393, PMID:18322460, PMID:19239890] |
| GO:0005654 | nucleoplasm | cellular_component | That part of the nuclear content other than the chromosomes or the nucleolus. [GOC:ma, ISBN:0124325653] |
| GO:0016043 | cellular component organization | biological_process | A process that results in the assembly, arrangement of constituent parts, or disassembly of a cellular component. [GOC:ai, GOC:jl, GOC:mah] |
| GO:0071011 | precatalytic spliceosome | cellular_component | A spliceosomal complex that is formed by the recruitment of a preassembled U5-containing tri-snRNP to the prespliceosome. Although all 5 snRNPs are present, the precatalytic spliceosome is catalytically inactive. The precatalytic spliceosome includes many proteins in addition to those found in the associated snRNPs. [GOC:ab, GOC:krc, GOC:mah, PMID:18322460, PMID:19239890] |
| GO:0008270 | zinc ion binding | molecular_function | Binding to a zinc ion (Zn). [GOC:ai] |
| GO:0022618 | ribonucleoprotein complex assembly | biological_process | The aggregation, arrangement and bonding together of proteins and RNA molecules to form a ribonucleoprotein complex. [GOC:jl] |
| GO:0022607 | cellular component assembly | biological_process | The aggregation, arrangement and bonding together of a cellular component. [GOC:isa_complete] |