UNIPROT #

Q15418

PROTEIN NAME

Phospho-RSK1 (S380)

SYNONYMS

90 kDa ribosomal protein S6 kinase 1 antibody; dJ590P13.1 (ribosomal protein S6 kinase, 90kD, polypeptide 1 antibody; dJ590P13.1 antibody; EC 2.7.11.1 antibody; HU 1 antibody; HU1 antibody; KS6A1_HUMAN antibody; MAP kinase activated protein kinase 1a antibody; MAP kinase-activated protein kinase 1a antibody; MAPK-activated protein kinase 1a antibody; MAPKAP kinase 1a antibody; MAPKAPK-1a antibody; MAPKAPK1A antibody; MGC79981 antibody; Mitogen-activated protein kinase-activated protein kinase 1A antibody; OTTHUMP00000004113 antibody; p90 RSK1 antibody; p90-RSK 1 antibody; p90rsk antibody; p90RSK1 antibody; p90S6K antibody; pp90RSK1 antibody; Ribosomal protein S6 kinase 90kD 1 antibody; Ribosomal protein S6 kinase 90kD polypeptide 1 antibody; Ribosomal protein S6 kinase 90kDa polypeptide 1 antibody; Ribosomal protein S6 kinase alpha 1 antibody; Ribosomal protein S6 kinase alpha-1 antibody; Ribosomal protein S6 kinase polypeptide 1 antibody; Ribosomal S6 kinase 1 antibody; RPS6K1 alpha antibody; rps6ka antibody; Rps6ka1 antibody; RSK 1 antibody; RSK 1 p90 antibody; RSK antibody; RSK-1 antibody; RSK1 antibody; S6K alpha 1 antibody; S6K-alpha-1 antibody

SEQUENCE SIMILARITIES

Belongs to the protein kinase superfamily. AGC Ser/Thr protein kinase family. S6 kinase subfamily.

POST-TRANSLATIONAL MODIFICATION

Activated by phosphorylation at Ser-221 by PDPK1. Autophosphorylated on Ser-380, as part of the activation process. May be phosphorylated at Thr-359 and Ser-363 by MAPK1/ERK2 and MAPK3/ERK1.; N-terminal myristoylation results in an activated kinase in the absence of added growth factors.

SUBCELLULAR LOCATION

Nucleus, Cytoplasm.

FUNCTION

The family of ribosomal S6 kinases (Rsks), designated Rsk-1, Rsk-2 and Rsk-3, are important signaling intermediates that mediate responses to a broad range of ligand-activated receptor tyrosine kinases. It has been established that Rsk-3 is not activated by MAP kinase in vitro, unlike Rsk-1 and Rsk-2. A unique feature common to the three members of the Rsk family is that each possesses two non-identical complete kinase catalytic domains. The Rsk family amino-terminal kinase domain is phosphorylated on Ser 227 by 3-phosphoinositide-dependent protein kinase-1 (PDK1), which increases the kinase activity of Rsk. In the carboxy-terminal kinase domain, Rsk-1 and Rsk-2 are autophosphorylated on Ser 380 and Ser 386, respectively, which mediates the docking of PDK1 to Rsk in order to promote phosphorylation of substrates, such as histone H3.