Protein: Superkiller complex protein 2 (Q15477)
Organism: Homo sapiens (Human)
Function: Helicase component of the SKI complex, a multiprotein complex that assists the RNA-degrading exosome during the mRNA decay and quality-control pathways. The SKI complex catalyzes mRNA extraction from 80S ribosomal complexes in the 3'-5' direction and channels mRNA to the cytosolic exosome for degradation. SKI-mediated extraction of mRNA from stalled ribosomes allow binding of the Pelota-HBS1L complex and subsequent ribosome disassembly by ABCE1 for ribosome recycling. In the nucleus, the SKI complex associates with transcriptionally active genes in a manner dependent on PAF1 complex (PAF1C)
Subcellular location: Nucleus. Cytoplasm
Sequence: MMETERLVLPPPDPLDLPLRAVELGCTGHWELLNLPGAPESSLPHGLPPCAPDLQQEAEQLFLSSPAWLPLHGVEHSARKWQRKTDPWSLLAVLGAPVPSDLQAQRHPTTGQILGYKEVLLENTNLSATTSLSLRRPPGPASQSLWGNPTQYPFWPGGMDEPTITDLNTREEAEEEIDFEKDLLTIPPGFKKGMDFAPKDCPTPAPGLLSLSCMLEPLDLGGGDEDENEAVGQPGGPRGDTVSASPCSAPLARASSLEDLVLKEASTAVSTPEAPEPPSQEQWAIPVDATSPVGDFYRLIPQPAFQWAFEPDVFQKQAILHLERHDSVFVAAHTSAGKTVVAEYAIALAQKHMTRTIYTSPIKALSNQKFRDFRNTFGDVGLLTGDVQLHPEASCLIMTTEILRSMLYSGSDVIRDLEWVIFDEVHYINDVERGVVWEEVLIMLPDHVSIILLSATVPNALEFADWIGRLKRRQIYVISTVTRPVPLEHYLFTGNSSKTQGELFLLLDSRGAFHTKGYYAAVEAKKERMSKHAQTFGAKQPTHQGGPAQDRGVYLSLLASLRTRAQLPVVVFTFSRGRCDEQASGLTSLDLTTSSEKSEIHLFLQRCLARLRGSDRQLPQVLHMSELLNRGLGVHHSGILPILKEIVEMLFSRGLVKVLFATETFAMGVNMPARTVVFDSMRKHDGSTFRDLLPGEYVQMAGRAGRRGLDPTGTVILLCKGRVPEMADLHRMMMGKPSQLQSQFRLTYTMILNLLRVDALRVEDMMKRSFSEFPSRKDSKAHEQALAELTKRLGALEEPDMTGQLVDLPEYYSWGEELTETQHMIQRRIMESVNGLKSLSAGRVVVVKNQEHHNALGVILQVSSNSTSRVFTTLVLCDKPLSQDPQDRGPATAEVPYPDDLVGFKLFLPEGPCDHTVVKLQPGDMAAITTKVLRVNGEKILEDFSKRQQPKFKKDPPLAAVTTAVQELLRLAQAHPAGPPTLDPVNDLQLKDMSVVEGGLRARKLEELIQGAQCVHSPRFPAQYLKLRERMQIQKEMERLRFLLSDQSLLLLPEYHQRVEVLRTLGYVDEAGTVKLAGRVACAMSSHELLLTELMFDNALSTLRPEEIAALLSGLVCQSPGDAGDQLPNTLKQGIERVRAVAKRIGEVQVACGLNQTVEEFVGELNFGLVEVVYEWARGMPFSELAGLSGTPEGLVVRCIQRLAEMCRSLRGAARLVGEPVLGAKMETAATLLRRDIVFAASLYTQ
InterPro domains: - IPR025696: Exosome RNA helicase MTR4-like, beta-barrel domain (domain) [832-1046]
- IPR011545: DEAD/DEAH-box helicase domain (domain) [314-460]
- IPR040801: Ski2, N-terminal domain (domain) [79-200]
- IPR001650: Helicase, C-terminal domain-like (domain) [585-755]
- IPR050699: RNA/DNA Helicase (family) [108-1229]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [276-741]
- IPR014001: Helicase superfamily 1/2, ATP-binding domain (domain) [307-490]
- IPR012961: ATP-dependent RNA helicase Ski2/MTR4, C-terminal (domain) [1069-1245]
- IPR048392: Exosome RNA helicase MTR4-like, stalk (domain) [763-829]
- IPR016438: ATP-dependent RNA helicase SKI2-like (family) [50-1245]
Interaction partners: - Superkiller complex protein 8
- Superkiller complex protein 3
- Exosome complex component RRP41
- Exosome complex component CSL4
- Exosome complex component RRP46
- Exosome complex component RRP42
- Exosome complex component RRP40
- Exosome complex component MTR3
- 5'-3' exoribonuclease 1
- Exosome complex component RRP43
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:0006807 (nitrogen compound metabolic process), GO:0044238 (primary metabolic process), GO:0071704 (organic substance metabolic process), GO:0043170 (macromolecule metabolic process), GO:1901564 (organonitrogen compound metabolic process), GO:0019538 (protein metabolic process), GO:0036211 (protein modification process), GO:0043412 (macromolecule modification), GO:0070647 (protein modification by small protein conjugation or removal), GO:0032446 (protein modification by small protein conjugation), GO:0016567 (protein ubiquitination)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043233 (organelle lumen), 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)