At dendritic spines, CAMK1, activated by CaMKK-mediated phosphorylation downstream of NMDA receptor activation, phosphorylates GIT1-bound ARHGEF7 (beta-PIX) on serine residue S516 (Saneyoshi et al. 2013).
calmodulin-dependent protein kinase activity of p-T177-CAMK1:CALM1:4xCa2+ [cytosol]
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