go_id,ontology,go_term,term_definition,evidence GO:0000287,MF,"magnesium ion binding","Interacting selectively and non-covalently with magnesium (Mg) ions.",IDA GO:0000398,BP,"mRNA splicing, via spliceosome","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.",IGI GO:0003723,MF,"RNA binding","Interacting selectively and non-covalently with an RNA molecule or a portion thereof.",IEA GO:0004652,MF,"polynucleotide adenylyltransferase activity","Catalysis of the template-independent extension of the 3'- end of an RNA or DNA strand by addition of one adenosine molecule at a time. Cannot initiate a chain 'de novo'. The primer, depending on the source of the enzyme, may be an RNA or DNA fragment, or oligo(A) bearing a 3'-OH terminal group.",IDA|ISS|TAS GO:0005515,MF,"protein binding","Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).",IPI GO:0005524,MF,"ATP binding","Interacting selectively and non-covalently with ATP, adenosine 5'-triphosphate, a universally important coenzyme and enzyme regulator.",IEA GO:0005634,CC,nucleus,"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.",IEA GO:0005654,CC,nucleoplasm,"That part of the nuclear content other than the chromosomes or the nucleolus.",IDA GO:0005737,CC,cytoplasm,"All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.",IDA GO:0006369,BP,"termination of RNA polymerase II transcription","The process in which the synthesis of an RNA molecule by RNA polymerase II using a DNA template is completed.",TAS GO:0006378,BP,"mRNA polyadenylation","The enzymatic addition of a sequence of 40-200 adenylyl residues at the 3' end of a eukaryotic mRNA primary transcript.",IMP GO:0030145,MF,"manganese ion binding","Interacting selectively and non-covalently with manganese (Mn) ions.",IEA GO:0031124,BP,"mRNA 3'-end processing","Any process involved in forming the mature 3' end of an mRNA molecule.",TAS GO:0031440,BP,"regulation of mRNA 3'-end processing","Any process that modulates the frequency, rate or extent of mRNA 3'-end processing, any process involved in forming the mature 3' end of an mRNA molecule.",IDA GO:0043631,BP,"RNA polyadenylation","The enzymatic addition of a sequence of adenylyl residues at the 3' end of an RNA molecule.",ISS