Aliases for RPS6KA4 Gene
External Ids for RPS6KA4 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 CREB1 and c-fos. Alternate transcriptional splice variants of this gene have been observed but have not been thoroughly characterized. [provided by RefSeq, Jul 2008]
GeneCards Summary for RPS6KA4 Gene
RPS6KA4 (Ribosomal Protein S6 Kinase, 90kDa, Polypeptide 4) is a Protein Coding gene. Among its related pathways are MAPK signaling pathway and L1CAM interactions. GO annotations related to this gene include protein serine/threonine kinase activity and ribosomal protein S6 kinase activity. An important paralog of this gene is MKNK2.
UniProtKB/Swiss-Prot for RPS6KA4 Gene
Serine/threonine-protein kinase that is required for the mitogen or stress-induced phosphorylation of the transcription factors CREB1 and ATF1 and for the regulation of the transcription factor RELA, and that contributes to gene activation by histone phosphorylation and functions in the regulation of inflammatory genes. Phosphorylates CREB1 and ATF1 in response to mitogenic or stress stimuli such as UV-C irradiation, epidermal growth factor (EGF) and anisomycin. Plays an essential role in the control of RELA transcriptional activity in response to TNF. Phosphorylates Ser-10 of histone H3 in response to mitogenics, stress stimuli and EGF, which results in the transcriptional activation of several immediate early genes, including proto-oncogenes c-fos/FOS and c-jun/JUN. May also phosphorylate Ser-28 of histone H3. Mediates the mitogen- and stress-induced phosphorylation of high mobility group protein 1 (HMGN1/HMG14). In lipopolysaccharide-stimulated primary macrophages, acts downstream of the Toll-like receptor TLR4 to limit the production of pro-inflammatory cytokines. Functions probably by inducing transcription of the MAP kinase phosphatase DUSP1 and the anti-inflammatory cytokine interleukin 10 (IL10), via CREB1 and ATF1 transcription factors.
p90 ribosomal S6 kinases (RSKs) are a family of protein serine/threonine kinases that regulate diverse cellular processes such as cell growth, motility, survival and proliferation. There are four isoforms of this enzyme; RSK1-4, which are directly activated by ERK1/2 in response to growth factors, many polypeptide hormones, neurotransmitters and chemokines. p90 RSKs phosphorylate numerous cytosolic and nuclear targets and act as downstream effectors of the ERK/MAPK signaling cascade. They are expressed ubiquitously in human tissues and exist in multiple subcellular compartments. Abberant activation of p90 RSKs has been linked to many human diseases, including breast and prostate cancers.