CIPK serine-threonine protein kinases interact with CBL proteins. Binding of a CBL protein to the regulatory NAF domain of CIPK protein lead to the activation of the kinase in a calcium- dependent manner (By similarity). At1g48260 PKS20 CBL-interacting serine/threonine-protein kinase 17 F21D18.2 SnRK3.21 F11A17.18 432 MVIKGMRVGKYELGRTLGEGNSAKVKFAIDTLTGESFAIKIIEKSCITRLNVSFQIKREIRTLKVLKHPNIVRLHEVLASKTKIYMVLECVTGGDLFDRIVSKGKLSETQGRKMFQQLIDGVSYCHNKGVFHRDLKLENVLLDAKGHIKITDFGLSALSQHYREDGLLHTTCGSPNYVAPEVLANEGYDGAASDIWSCGVILYVILTGCLPFDDANLAVICRKIFKGDPPIPRWISLGAKTMIKRMLDPNPVTRVTIAGIKAHDWFKHDYTPSNYDDDDDVYLIQEDVFMMKEYEEEKSPDSPTIINAFQLIGMSSFLDLSGFFETEKLSERQIRFTSNSLAKDLLENIETIFTEMGFCLQKKHAKLKAIKEESTQKRQCGLSVTAEVFEISPSLNVVELRKSHGDSSLYKQLYERLLNELGSSSQVQELLA CIPK17 SNF1-related kinase 3.21 CIPKH_ARATH SOS2-like protein kinase PKS20