Protein: Targeting protein for Xklp2 (A2APB8)
Organism: Mus musculus (Mouse)
Function: Spindle assembly factor required for normal assembly of mitotic spindles. Required for normal assembly of microtubules during apoptosis. Required for chromatin and/or kinetochore dependent microtubule nucleation. Mediates AURKA localization to spindle microtubules. Activates AURKA by promoting its autophosphorylation at 'Thr-288' and protects this residue against dephosphorylation. TPX2 is inactivated upon binding to importin-alpha. At the onset of mitosis, GOLGA2 interacts with importin-alpha, liberating TPX2 from importin-alpha, allowing TPX2 to activates AURKA kinase and stimulates local microtubule nucleation.
Subcellular location: Nucleus {ECO:0000250|UniProtKB:Q9ULW0}. Cytoplasm, cytoskeleton, spindle {ECO:0000269|PubMed:27753540}. Cytoplasm, cytoskeleton, spindle pole {ECO:0000250|UniProtKB:Q9ULW0}. Note=During mitosis it is strictly associated with the spindle pole and with the mitotic spindle, whereas during S and G2, it is diffusely distributed throughout the nucleus. Is released from the nucleus in apoptotic cells and is detected on apoptotic microtubules. {ECO:0000250|UniProtKB:Q9ULW0}.
Sequence: MSQVPTTYSFDAPTDFINFSSLDAEEDTENIDSWFDEKANLENKFLRQRGIGEPFQGKNSLRKAKLQQGFVTPLKAVDNTYHKETEKENLQKQSIPSNDCSSLDAKRAVSGNTPVQPQRRSIRLSAQKDLEQKEKNHVASVEMKAKRCVAPATDCPPQKRMKVSHKKKLEEEEEGSAPATSRKNERETLEKAKGKHTVPGVPPAREKVLKSTEEQEIEKRLRMQQEVVELRRKNEEFKKLALAGPGQPVKKSTSQVTKTVDFHFLTDERIKQHPKNQEEYKEVNFMSELRKHSSTPARGTRGCTIIKPFNLSKGKKRTFDEAASTYVPIAQQVEAFHKRTPNRYHLRNKKDESLLPSKSVNKIARDPQTPILQTKYRTRAVTCKSTAEQEAEELEKLQQYKFKARELDPRIFESGPILPKRAPVKPPTQPVGFDLEIEKRIHERESKKKTEDEQFEFHSRPCPTKILEDVVGVPEKKVIPATVPKSPVFALKNRIRVPIKDEEEEKPVVIKAQPVPHYGVPYKPHIAEARNVEVCPFSFDTRDKERQLQKEKKIKEMQKGEVPKFKALPVPHFDTINLPEKKVKNVTQAEPFSLETDKRGAYKAEMWKHQLEEEQKQQKDAACFKARPNTVIFQEPFVPKKEKKSLAENPSGSLVQEPFQLATERRAKERQELEKKMAEVEAWKLQQLEEVRQQEEEQQKEELARLRKELVHKANPIRKYAAVEVKSSELPLTVPVSPKFSTRFQ
InterPro domains: - IPR009675: TPX2 (family) [433-743]
- IPR027329: TPX2, C-terminal (domain) [542-733]
- IPR015128: Aurora-A binding (domain) [1-68]
- IPR027330: TPX2 central domain (domain) [365-489]
Interaction partners: - Transcription factor RelB
- Transcription factor p65
- Nuclear factor NF-kappa-B p105 subunit
- Proto-oncogene c-Rel
- Aurora kinase A
- Nuclear factor NF-kappa-B p100 subunit
- Transforming acidic coiled-coil-containing protein 3
- Cytoskeleton-associated protein 2-like
- Mitotic checkpoint serine/threonine-protein kinase BUB1 beta
- Cyclin-A2
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding), GO:0019899 (enzyme binding), GO:0019900 (kinase binding), GO:0019901 (protein kinase binding)
Biological Process (BP): GO:0008150 (biological process), GO:0065007 (biological regulation), GO:0048518 (positive regulation of biological process), GO:0050789 (regulation of biological process), GO:0009987 (cellular process), GO:0019222 (regulation of metabolic process), GO:0022402 (cell cycle process), GO:0050794 (regulation of cellular process), GO:0007049 (cell cycle), GO:0009893 (positive regulation of metabolic process), GO:0065009 (regulation of molecular function), GO:0048522 (positive regulation of cellular process), GO:0050790 (regulation of catalytic activity), GO:0044093 (positive regulation of molecular function), GO:1903047 (mitotic cell cycle process), GO:0010604 (positive regulation of macromolecule metabolic process), GO:0031325 (positive regulation of cellular metabolic process), GO:0051171 (regulation of nitrogen compound metabolic process), GO:0051173 (positive regulation of nitrogen compound metabolic process), GO:0060255 (regulation of macromolecule metabolic process), GO:0031323 (regulation of cellular metabolic process), GO:0080090 (regulation of primary metabolic process), GO:0000278 (mitotic cell cycle), GO:0010562 (positive regulation of phosphorus metabolic process), GO:0051246 (regulation of protein metabolic process), GO:0051247 (positive regulation of protein metabolic process), GO:0051338 (regulation of transferase activity), GO:0043085 (positive regulation of catalytic activity), GO:0051174 (regulation of phosphorus metabolic process), GO:0043549 (regulation of kinase activity), GO:0051347 (positive regulation of transferase activity), GO:0031399 (regulation of protein modification process), GO:0045937 (positive regulation of phosphate metabolic process), GO:0031401 (positive regulation of protein modification process), GO:0019220 (regulation of phosphate metabolic process), GO:0042325 (regulation of phosphorylation), GO:0001932 (regulation of protein phosphorylation), GO:0033674 (positive regulation of kinase activity), GO:0042327 (positive regulation of phosphorylation), GO:0001934 (positive regulation of protein phosphorylation), GO:0045859 (regulation of protein kinase activity), GO:0045860 (positive regulation of protein kinase activity), GO:0032147 (activation of protein kinase activity)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0000922 (spindle pole), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043233 (organelle lumen), GO:0097431 (mitotic spindle pole), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0005856 (cytoskeleton), GO:0031981 (nuclear lumen), GO:0005819 (spindle), GO:0005634 (nucleus), GO:0072686 (mitotic spindle), GO:0015630 (microtubule cytoskeleton)