Serine/threonine-protein kinase involved in memory formation. Together with the cAMP-dependent protein kinase A Pka-C1, promotes long-term memory (LTM) by regulating CrebB stability and activity. Involved in the maintenance of anesthesia-sensitive memory (ASM) which includes short-term memory (STM) and middle-term memory (MTM). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Activated by Pka-C1-mediated phosphorylation of Ser-334. Expressed in the mushroom bodies (at protein level). Expressed broadly in the third instar larvae and adult flies (at protein levels). Results in a decreased CrebB protein translation or stability in the brain. RNAi-mediated knockdown in the mushroom bodies results in a reduction of memory formation, including anesthesia-sensitive memory (ASM) and long-term memory (LTM) performance but not anesthesia-resistant memory (ARM) or learning ability. Meng-Po is the Lady of Forgetfulness, a character in Chinese mythology, who ensures that people are ready for reincarnation by providing the 'Tea of Forgetfulness' that makes them loose the memories associated with their former life. Belongs to the protein kinase superfamily. Ser/Thr protein kinase family.