Protein kinase that plays a role in vesicle-mediated transport processes and exocytosis. Regulates GH1 release by brain neurons. Phosphorylates NSF, and thereby regulates NSF oligomerization. Required for normal spermatogenesis. Regulates neuron differentiation and dendrite development (By similarity). Plays a role in the regulation of insulin secretion in response to changes in blood glucose levels. Can phosphorylate CCNY at 'Ser-336' (in vitro). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Found in a complex containing CABLES1, CDK17 and TDRD7. Interacts with YWHAH, YWHAQ and YWHAZ. Interacts with NSF. Identified in a complex with NSF, syntaxin-1, synaptotagmin, SYN1, SYP and CDK5R1 (By similarity). Interacts with BRSK2. Interacts with CCNY; this increases the CDK16 kinase activity. Colocalizes with insulin in pancreas islets. Recruited to the cell membrane by CCNY. Detected in pancreas islets (at protein level). Detected in brain and pancreas. Phosphorylation at Ser-153 inhibits kinase activity. Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily. Truncated N-terminus. Truncated N-terminus.