Aliases for RPS6KA3 Gene
- Ribosomal Protein S6 Kinase A3 2 3 5
- MAP Kinase-Activated Protein Kinase 1b 3 4
- Insulin-Stimulated Protein Kinase 1 3 4
- Ribosomal Protein S6 Kinase Alpha-3 3 4
- MAPK-Activated Protein Kinase 1b 3 4
- Ribosomal S6 Kinase 2 3 4
- MAPKAP Kinase 1b 3 4
- S6K-Alpha-3 3 4
- EC 220.127.116.11 4 54
- MAPKAPK-1b 3 4
- MAPKAPK1B 3 4
- P90-RSK 3 3 4
- Pp90RSK2 3 4
- ISPK-1 3 4
External Ids for RPS6KA3 Gene
Previous HGNC Symbols for RPS6KA3 Gene
Previous GeneCards Identifiers for RPS6KA3 Gene
This gene encodes a member of the RSK (ribosomal S6 kinase) family of serine/threonine kinases. This kinase contains 2 non-identical kinase catalytic domains and phosphorylates various substrates, including members of the mitogen-activated kinase (MAPK) signalling pathway. The activity of this protein has been implicated in controlling cell growth and differentiation. Mutations in this gene have been associated with Coffin-Lowry syndrome (CLS). [provided by RefSeq, Jul 2008]
GeneCards Summary for RPS6KA3 Gene
RPS6KA3 (Ribosomal Protein S6 Kinase A3) is a Protein Coding gene. Diseases associated with RPS6KA3 include Coffin-Lowry Syndrome and Symptomatic Form Of Coffin-Lowry Syndrome In Female Carriers. Among its related pathways are Cellular Senescence (REACTOME) and Activated TLR4 signalling. Gene Ontology (GO) annotations related to this gene include transferase activity, transferring phosphorus-containing groups and protein tyrosine kinase activity. An important paralog of this gene is RPS6KA2.
UniProtKB/Swiss-Prot Summary for RPS6KA3 Gene
Serine/threonine-protein kinase that acts downstream of ERK (MAPK1/ERK2 and MAPK3/ERK1) signaling and mediates mitogenic and stress-induced activation of the transcription factors CREB1, ETV1/ER81 and NR4A1/NUR77, regulates translation through RPS6 and EIF4B phosphorylation, and mediates cellular proliferation, survival, and differentiation by modulating mTOR signaling and repressing pro-apoptotic function of BAD and DAPK1. In fibroblast, is required for EGF-stimulated phosphorylation of CREB1 and histone H3 at 'Ser-10', which results in the subsequent transcriptional activation of several immediate-early genes. In response to mitogenic stimulation (EGF and PMA), phosphorylates and activates NR4A1/NUR77 and ETV1/ER81 transcription factors and the cofactor CREBBP. Upon insulin-derived signal, acts indirectly on the transcription regulation of several genes by phosphorylating GSK3B at 'Ser-9' and inhibiting its activity. Phosphorylates RPS6 in response to serum or EGF via an mTOR-independent mechanism and promotes translation initiation by facilitating assembly of the preinitiation complex. In response to insulin, phosphorylates EIF4B, enhancing EIF4B affinity for the EIF3 complex and stimulating cap-dependent translation. Is involved in the mTOR nutrient-sensing pathway by directly phosphorylating TSC2 at 'Ser-1798', which potently inhibits TSC2 ability to suppress mTOR signaling, and mediates phosphorylation of RPTOR, which regulates mTORC1 activity and may promote rapamycin-sensitive signaling independently of the PI3K/AKT pathway. Mediates cell survival by phosphorylating the pro-apoptotic proteins BAD and DAPK1 and suppressing their pro-apoptotic function. Promotes the survival of hepatic stellate cells by phosphorylating CEBPB in response to the hepatotoxin carbon tetrachloride (CCl4). Is involved in cell cycle regulation by phosphorylating the CDK inhibitor CDKN1B, which promotes CDKN1B association with 14-3-3 proteins and prevents its translocation to the nucleus and inhibition of G1 progression. In LPS-stimulated dendritic cells, is involved in TLR4-induced macropinocytosis, and in myeloma cells, acts as effector of FGFR3-mediated transformation signaling, after direct phosphorylation at Tyr-529 by FGFR3. Negatively regulates EGF-induced MAPK1/3 phosphorylation via phosphorylation of SOS1. Phosphorylates SOS1 at 'Ser-1134' and 'Ser-1161' that create YWHAB and YWHAE binding sites and which contribute to the negative regulation of MAPK1/3 phosphorylation (By similarity). Phosphorylates EPHA2 at 'Ser-897', the RPS6KA-EPHA2 signaling pathway controls cell migration (PubMed:26158630).
Ribosomal S6 protein kinases (RSKs) are a family of protein serine/threonine kinases that regulate diverse cellular processes such as cellular growth, motility, survival and proliferation. The RSK family can be divided into two subfamilies, namely p90 RSK and p70 S6K.