Protein: Exosome complex component mtr3 (Q9P7R3)
Organism: Schizosaccharomyces pombe (strain 972 / ATCC 24843) (Fission yeast)
Function: Non-catalytic component of the RNA exosome complex which has 3'->5' exoribonuclease activity and participates in a multitude of cellular RNA processing and degradation events. In the nucleus, the RNA exosome complex is involved in proper maturation of stable RNA species such as rRNA, snRNA and snoRNA, in the elimination of RNA processing by-products and non-coding 'pervasive' transcripts, such as antisense RNA species and cryptic unstable transcripts (CUTs), and of mRNAs with processing defects, thereby limiting or excluding their export to the cytoplasm. In the cytoplasm, the RNA exosome complex is involved in general mRNA turnover and in RNA surveillance pathways, preventing translation of aberrant mRNAs. The catalytic inactive RNA exosome core complex of 9 subunits (Exo-9) is proposed to play a pivotal role in the binding and presentation of RNA for ribonucleolysis, and to serve as a scaffold for the association with catalytic subunits and accessory proteins or complexes. ski6 is part of the hexameric ring of RNase PH domain-containing subunits proposed to form a central channel which threads RNA substrates for degradation (By similarity).
Subcellular location: Cytoplasm {ECO:0000269|PubMed:16823372}. Nucleus, nucleolus {ECO:0000269|PubMed:16823372}.
Sequence: MSDRKRVYGPSVSVPPYFEEPEQPVFTRTRDVDRCRKIYLKLGWATKAVGSSYFESEKIKIACTVSGPRPSKTFAFRSSAKLNCEFRLSPFSTSVRQGHVQTVEEKSYSQMIEAAISPSILLHLYPKSSIDVYIQVIESDGALATLAAAISCASSAIADANIDCIDLVTGSSVLFNPNTDEYWIDPDYVDERARAAKGSVVMGYMASLGHVTQVWERGTCSPSRLSFLTEKCIKNAKDTRLVINHALLLEKSKSEDP
InterPro domains: - IPR036345: Exoribonuclease, PH domain 2 superfamily (homologous_superfamily) [166-247]
- IPR001247: Exoribonuclease, phosphorolytic domain 1 (domain) [35-162]
- IPR027408: PNPase/RNase PH domain superfamily (homologous_superfamily) [1-252]
- IPR020568: Ribosomal protein uS5 domain 2-type superfamily (homologous_superfamily) [30-162]
- IPR050080: Ribonuclease PH (family) [29-243]
Interaction partners: - Exosome complex exonuclease dis3
- Exosome complex component rrp42
- Exosome complex component rrp4
- Exosome complex component rrp40
- Exosome complex component rrp43
- Exosome complex component rrp46
- Exosome complex component rrp45
- Exosome complex component csl4
- Exosome complex component ski6
- Exosome complex protein C1739.07
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0009056 (catabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:1901575 (organic substance catabolic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0044260 (cellular macromolecule metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0044248 (cellular catabolic process), GO:0046700 (heterocycle catabolic process), GO:0034655 (nucleobase-containing compound catabolic process), GO:0009057 (macromolecule catabolic process), GO:0044270 (cellular nitrogen compound catabolic process), GO:0090304 (nucleic acid metabolic process), GO:0044265 (cellular macromolecule catabolic process), GO:0019439 (aromatic compound catabolic process), GO:1901361 (organic cyclic compound catabolic process), GO:0016070 (RNA metabolic process), GO:0006401 (RNA catabolic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0032991 (protein-containing complex), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005829 (cytosol), GO:1902494 (catalytic complex), GO:0140513 (nuclear protein-containing complex), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0043233 (organelle lumen), GO:0000176 (nuclear exosome (RNase complex)), GO:0000178 (exosome (RNase complex)), GO:1905354 (exoribonuclease complex), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)