Tags: Protein.
HU-1 redirects here. For the helicopter see UH-1 Iroquois.Ribosomal protein S6 kinase alpha-1 is an enzyme that in humans is encoded by the RPS6KA1 gene.This gene encodes a member of the RSK (ribosomal S6 kinase) family of serine/threonine kinases. This kinase contains 2 nonidentical kinase catalytic domains and phosphorylates various substrates including members of the mitogen-activated kinase (MAPK) signalling pathway.