Mitogen-activated protein kinase kinase kinase 14 also known as NF-kappa-B-inducing kinase (NIK) is an enzyme encoded by the MAP3K14 gene. This protein is a serine/threonine protein-kinase. This kinase binds to TRAF2 and stimulates NF-κB activity. It is a critical kinase of the alternative NF-κB activation pathway. It shares sequence similarity with several other MAPKK kinases. It participates in an NF-κB-inducing signalling cascade common to receptors of the tumour-necrosis/nerve-growth factor (TNF/NGF) family and to the interleukin-1 type-I receptor.
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