Secretory calcium-dependent phospholipase A2 that primarily targets dietary phospholipids in the intestinal tract (By similarity). Hydrolyzes the ester bond of the fatty acyl group attached at sn-2 position of phospholipids (phospholipase A2 activity) with preference for phosphatidylethanolamines and phosphatidylglycerols over phosphatidylcholines (By similarity). May play a role in the biosynthesis of N-acyl ethanolamines that regulate energy metabolism and inflammation in the intestinal tract. Hydrolyzes N-acyl phosphatidylethanolamines to N-acyl lysophosphatidylethanolamines, which are further cleaved by a lysophospholipase D to release N-acyl ethanolamines (By similarity). May act in an autocrine and paracrine manner (PubMed:10066760). Upon binding to the PLA2R1 receptor can regulate podocyte survival and glomerular homeostasis (By similarity). Has anti-helminth activity in a process regulated by gut microbiota (PubMed:29024642). Upon helminth infection of intestinal epithelia, directly affects phosphatidylethanolamine contents in the membrane of helminth larvae, likely controlling an array of phospholipid-mediated cellular processes such as membrane fusion and cell division while providing for better immune recognition, ultimately reducing larvae integrity and infectivity (PubMed:29024642). a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) 1,2-ditetradecanoyl-sn-glycero-3-phosphocholine + H2O = 1-tetradecanoyl-sn-glycero-3-phosphocholine + H(+) + tetradecanoate 1,2-dihexadecanoyl-sn-glycero-3-phosphocholine + H2O = 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+) + hexadecanoate 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+) 1-hexadecanoyl-2-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-sn-glycero-3-phosphocholine + H2O = (5Z,8Z,11Z,14Z)-eicosatetraenoate + 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+) 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1'-sn-glycerol) + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + H(+) H2O + N-hexadecanoyl-1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phosphoethanolamine = (9Z)-octadecenoate + H(+) + N-hexadecanoyl-1-(9Z-octadecenoyl)-sn-glycero-3-phosphoethanolamine 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphoethanolamine + H2O = (9Z,12Z)-octadecadienoate + 1-hexadecanoyl-sn-glycero-3-phosphoethanolamine + H(+) H2O + N,1-dihexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphoethanolamine = (9Z,12Z)-octadecadienoate + H(+) + N,1-dihexadecanoyl-sn-glycero-3-phosphoethanolamine Binds 1 Ca(2+) ion per subunit. Monomer or homodimer (By similarity). Interacts with PLA2R1; this interaction mediates intracellular signaling as well as clearance of extracellular PLA2G1B via endocytotic pathway (PubMed:10066760). Secreted from pancreatic acinar cells in its inactive form. Expressed in pancreas, liver, lung and spleen (PubMed:10066760). Expressed in EPCAM-positive intestinal epithelial cell (at protein level) (PubMed:29024642). Up-regulated in EPCAM-positive intestinal epithelial cell upon helminth infection (PubMed:29024642). Up-regulated in intestinal epithelial organoids in response to stimulation with T-helper type 2 cytokines IL4 and IL13 (PubMed:29024642). Activated by trypsin cleavage in the duodenum. Can also be activated by thrombin or autocatalytically. Mutant mice are susceptible to H. polygyrus and N. brasiliensis infection, failing to expel larvae and retaining a sustained infection (PubMed:29024642). In response to high fat diet, mutant mice are resistant to hyperlipidemia associated with reduced hepatic very low density lipoprotein production and increased triglyceride-rich lipoprotein clearance (PubMed:21908646). Belongs to the phospholipase A2 family.