Mitogen-activated protein kinase (MAPK) signaling pathways involve closely related MAP kinases, including extracellular-signal-related kinase 3 (ERK 3, also designated PRKM6 and p97MAPK). Serum, growth factors and phorbol esters can initiate ERK 3 signaling pathways. Despite lacking a definitive nuclear localization sequence, ERK 3 constitutively localizes to the nucleus upon activation. p38 pathway activation-dependent upregulation of ERK 3 is independent of the status of p53, Bcl-2 and caspase-3 during cell stress and damage induced by proteasome inhibition, suggesting ERK 3 in part mediates intracellular defense or cell rescue. The human ERK 3 gene maps to chromosome 15q21.2 and encodes a 721 amino acid protein.
Synonyms: ERK-3, ERK3, ERK 3, ERK-3, Extracellular signal regulated kinase 3, Extracellular signal regulated kinase p97, Extracellular signal-regulated kinase 3, MAP kinase 6, MAP kinase isoform p97, MAPK 6, MAPK6, Mitogen activated protein kinase 6, Mitogen-activated protein kinase 6, MK06_HUMAN, p97 MAPK, p97-MAPK, PRKM6, Protein kinase mitogen activated 5, Protein kinase mitogen activated 6.