MARK

Microtubule affinity regulating kinase

Microtubule affinity-regulating kinases belong to the calcium/calmodulin-dependent protein kinase superfamily. MARKs and their homologs are functionally diverse protein kinases, possessing functional roles in cell polarity, microtubule stability, cell cycle control and intracellular signaling. Phosphorylation of the catalytic kinase domain (KD) by upstream kinases like MARKK (MARK kinase) can lead to activation of MARK. Activated MARK can phosphorylate tau protein and other related MAP proteins such as MAP2 and MAP4, which have affinities for stabilizing microtubules, and also can phosphorylate other proteins involved in cell signaling and 14-3-3 (also known as Par 5, partitioning defective protein 5) binding.

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