Ser1333 phosphorylation indicates ROCKI activation
2013
Background
Two isoforms of Rho-associated protein kinase (ROCK), ROCKI and ROCKII, play a pivotal role in regulation of cytoskeleton and are involved in multiple cellular processes in mammalian cells. Knockout mice experiments have indicated that the functions of ROCKI and II are probably non-redundant in physiology. However, it is difficult to differentiate the activation status of ROCKI and ROCKII in biological samples. Previously, we have identified phosphorylation site of ROCKII at Ser1366 residue sensitive to ROCK inhibition. We further investigated the activity-dependent phosphorylation site in ROCKI to establish the reagents that can be used to detect their individual activation.
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