Rabbit Anti-RPS6KA3 (phosphorylated Ser227) Recombinant Antibody (D53A11) (PTM-CBMAB-R4224-CN)

Rabbit

Human, Mouse, Rat, Monkey

D53A11

IgG

WB

Human, Mouse, Rat, Monkey

IgG

Monoclonal

The COA includes recommended starting dilutions, optimal dilutions should be determined by the end user.

ribosomal protein S6 kinase, 90kDa, polypeptide 3

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]

Ribosomal Protein S6 Kinase A3; MAP Kinase-Activated Protein Kinase 1b; Insulin-Stimulated Protein Kinase 1; MAPK-Activated Protein Kinase 1b; Ribosomal S6 Kinase 2; MAPKAP Kinase 1b; S6K-Alpha-3; EC 2.7.11.1; MAPKAPK-1b; P90-RSK 3; MAPKAPK1B; Pp90RSK2; ISPK-1; RSK-2; RSK2;

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 (PubMed:9770464, PubMed:16223362, PubMed:17360704, PubMed:16213824).
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 (PubMed:9770464, PubMed:10436156).
In response to mitogenic stimulation (EGF and PMA), phosphorylates and activates NR4A1/NUR77 and ETV1/ER81 transcription factors and the cofactor CREBBP (PubMed:16223362).
Upon insulin-derived signal, acts indirectly on the transcription regulation of several genes by phosphorylating GSK3B at 'Ser-9' and inhibiting its activity (PubMed:8250835).
Phosphorylates RPS6 in response to serum or EGF via an mTOR-independent mechanism and promotes translation initiation by facilitating assembly of the preinitiation complex (PubMed:17360704).
In response to insulin, phosphorylates EIF4B, enhancing EIF4B affinity for the EIF3 complex and stimulating cap-dependent translation (PubMed:18508509, PubMed:18813292).
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 (PubMed:18722121).
Mediates cell survival by phosphorylating the pro-apoptotic proteins BAD and DAPK1 and suppressing their pro-apoptotic function (PubMed:16213824).
Promotes the survival of hepatic stellate cells by phosphorylating CEBPB in response to the hepatotoxin carbon tetrachloride (CCl4) (PubMed:18508509, PubMed:18813292).
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 (By similarity).
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 (By similarity).
Negatively regulates EGF-induced MAPK1/3 phosphorylation via phosphorylation of SOS1 (By similarity).
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).
Acts as a regulator of osteoblast differentiation by mediating phosphorylation of ATF4, thereby promoting ATF4 transactivation activity (By similarity).

Cell cycleIEA:UniProtKB-KW
Central nervous system developmentManual Assertion Based On ExperimentTAS:ProtInc
Chemical synaptic transmissionTAS:Reactome
Intracellular signal transductionIEA:InterPro
Negative regulation of apoptotic processManual Assertion Based On ExperimentTAS:UniProtKB
Negative regulation of cysteine-type endopeptidase activity involved in apoptotic processManual Assertion Based On ExperimentIDA:UniProtKB
Peptidyl-serine phosphorylationManual Assertion Based On ExperimentIBA:GO_Central
Positive regulation of cell differentiationManual Assertion Based On ExperimentTAS:UniProtKB
Positive regulation of cell growthManual Assertion Based On ExperimentTAS:UniProtKB
Positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIMP:BHF-UCL
Regulation of DNA-templated transcription in response to stressManual Assertion Based On ExperimentTAS:UniProtKB
Regulation of translation in response to stressManual Assertion Based On ExperimentTAS:UniProtKB
Response to lipopolysaccharideISS:UniProtKB
Signal transductionManual Assertion Based On ExperimentTAS:ProtInc
Skeletal system developmentManual Assertion Based On ExperimentTAS:ProtInc
Toll-like receptor signaling pathwayISS:UniProtKB

Nucleus
Cytoplasm

Coffin-Lowry syndrome (CLS):
An X-linked mental retardation associated with facial and digital dysmorphisms, progressive skeletal malformations, growth retardation, hearing deficit and paroxysmal movement disorders.
Intellectual developmental disorder, X-linked 19 (XLID19):
A disorder characterized by significantly below average general intellectual functioning associated with impairments in adaptive behavior and manifested during the developmental period.

Activated by phosphorylation at Ser-227 by PDPK1. Autophosphorylated on Ser-386, as part of the activation process. May be phosphorylated at Thr-365 and Ser-369 by MAPK1/ERK2 and MAPK3/ERK1. Can also be activated via phosphorylation at Ser-386 by MAPKAPK2.
N-terminal myristoylation results in an activated kinase in the absence of added growth factors.