NCBI Accession #
NP_001326081.1
NCBI GenBank Nucleotide #
NM_001337768.1
NCBI Official Full Name
protein-serine kinase 1
NCBI Official Synonym Symbols
ARABIDOPSIS THALIANA PROTEIN-SERINE KINASE 1; ARABIDOPSIS THALIANA PROTEIN-SERINE KINASE 6; ATPK1; ATPK6; ATS6K1; P70 RIBOSOMAL S6 KINASE; PK6; PROTEIN-SERINE KINASE; protein-serine kinase 1; ROTEIN-SERINE KINASE 6; S6K1
NCBI Protein Information
protein-serine kinase 1
NCBI Summary
Encodes a protein-serine kinase that phosphorylates ribosomal protein in vitro. Activation of AtS6k is regulated by 1-naphthylacetic acid and kinetin, at least in part, via a lipid kinase-dependent pathway. Involved in translational up-regulation of ribosomal proteins. Phosphorylated by PDK1. Interacts with RAPTOR1, which in turn interacts with TOR. SPK6 activity is affected by osmotic stress, and plants overexpressing S6k1 are hypersensitive to osmotic stress. The gene is expressed in all tissues examined, with highest expression level detected in metabolically active tissues.
UniProt Synonym Gene Names
ATPK6; S6K1
UniProt Protein Name
Serine/threonine-protein kinase AtPK1/AtPK6
UniProt Synonym Protein Names
Ribosomal-protein S6 kinase homolog 1
UniProt Primary Accession #
P42818
UniProt Secondary Accession #
Q8LFC1
UniProt Related Accession #
P42818; AAB33197
UniProt Comments
Downstream effector of TOR signaling pathway involved in osmotic stress response. Could be involved in the control of plant growth and development. Phosphorylates the ribosomal proteins P14, P16 and S6. Functions as a repressor of cell proliferation and required for maintenance of chromosome stability and ploidy levels through the RBR1-E2F pathway.