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Letter

Nature Cell Biology 8, 863–869 (1 August 2006) | doi:10.1038/ncb1447

Negative regulation of ERK activity by VRK3-mediated activation of VHR phosphatase

Tae-Hong Kang & Kyong-Tai Kim

Extracellular signal regulated kinases (ERKs) represent a signalling hub in many physiological responses and have pivotal functions in cell proliferation, differentiation, development and death, as well as in synaptic plasticity. Mitogen-activated protein kinase phosphatases (MKPs) selectively inactivate ERKs by dephosphorylating critical phosphothreonine and phosphotyrosine residues.