Ribosomal Protein S6 Kinase Alpha-4

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Ribosomal protein S6 kinase alpha-4 (772 aa, ~86 kDa) is encoded by the human RPS6KA4 gene. This protein is involved in the mitogen or stress-induced phosphorylation of the transcription factors CREB1 and ATF1.

**Synonyms:** - 90 kDa Ribosomal Protein S6 Kinase 4 - EC 2.7.11.1 - Mitogen- and Stress-Activated Protein Kinase 2 - Nuclear Mitogen- and Stress-Activated Protein Kinase 2 - RPS6KA4 - RSKB - Ribosomal Protein Kinase B - Ribosomal S6 Kinase A4 - S6K-Alpha-4