Eukaryotic elongation factor 2 kinase (eEF2k) phosphorylates and inactivates eEF2, resulting in the inhibition of peptide-chain elongation (1).
eEF2k is normally dependent on Ca2+ ions and calmodulin (2,3).
It can be activated by PKA in response to elevated cAMP levels (4-6), which are generally increased in stress-or starvation-related conditions.
eEF2k can also be regulated in response to a wide range of stimuli that promote cell growth and protein synthesis.
This involves the phosphorylation of eEF2k by p90RSK and p70 S6 kinase at Ser366 or by SAPK4/p38d at Ser359, leading to the inactivation of eEF2k (7,8), which facilitates the dephosphorylation of eEF2, and thus promotes translation.
Applications:Suitable for use in Western Blot, Immunoprecipitation.