EOG8V45QH GO:0000166 25/90 nucleotide binding molecular_function "Interacting selectively and non-covalently with a nucleotide, any compound consisting of a nucleoside that is esterified with (ortho)phosphate or an oligophosphate at any hydroxyl group on the ribose or deoxyribose." [GOC:mah, ISBN:0198547684] EOG8V45QH GO:0003676 24/90 nucleic acid binding molecular_function "Interacting selectively and non-covalently with any nucleic acid." [GOC:jl] EOG8V45QH GO:0005634 1/90 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] EOG8V45QH GO:0005515 1/90 protein binding molecular_function "Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules)." [GOC:go_curators] EOG8V45QH GO:0003723 1/90 RNA binding molecular_function "Interacting selectively and non-covalently with an RNA molecule or a portion thereof." [GOC:mah] EOG8V45QH GO:0048025 1/90 negative regulation of mRNA splicing, via spliceosome biological_process "Any process that stops, prevents or reduces the rate or extent of mRNA splicing via a spliceosomal mechanism." [GOC:jid] EOG8V45QH GO:0071011 1/90 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] EOG8V45QH GO:0019013 1/90 viral nucleocapsid cellular_component "The complete protein-nucleic acid complex that is the packaged form of the genome in a virus particle." [ISBN:0781702534] EOG8V45QH GO:0016607 1/90 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/] EOG8V45QH GO:0007052 1/90 mitotic spindle organization biological_process "A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of the microtubule spindle during a mitotic cell cycle." [GOC:mah] EOG8V45QH GO:0000398 1/90 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] EOG8V45QH GO:0071013 1/90 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] EOG8V45QH GO:0005685 1/90 U1 snRNP cellular_component "A ribonucleoprotein complex that contains small nuclear RNA U1." [GOC:krc, GOC:mah] EOG8V45QH GO:0005681 1/90 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] EOG8V45QH GO:0003729 1/90 mRNA binding molecular_function "Interacting selectively and non-covalently with messenger RNA (mRNA), an intermediate molecule between DNA and protein. mRNA includes UTR and coding sequences, but does not contain introns." [GOC:kmv, SO:0000234] EOG8V45QH GO:0022008 1/90 neurogenesis biological_process "Generation of cells within the nervous system." [GO_REF:0000021, GOC:cls, GOC:curators, GOC:dgh, GOC:dph, GOC:jid, GOC:mtg_15jun06] EOG8V45QH GO:0000381 1/90 regulation of alternative mRNA splicing, via spliceosome biological_process "Any process that modulates the frequency, rate or extent of alternative splicing of nuclear mRNAs." [GOC:krc] EOG8V45QH GO:0030529 1/90 ribonucleoprotein complex cellular_component "A macromolecular complex containing both protein and RNA molecules." [GOC:krc] EOG8V45QH GO:0043484 1/90 regulation of RNA splicing biological_process "Any process that modulates the frequency, rate or extent of RNA splicing, the process of removing sections of the primary RNA transcript to remove sequences not present in the mature form of the RNA and joining the remaining sections to form the mature form of the RNA." [GOC:jl]