CBASS (cyclic oligonucleotide-based antiphage signaling system) provides immunity against bacteriophage. The CD-NTase protein synthesizes cyclic nucleotides in response to infection; these serve as specific second messenger signals. The signals activate a diverse range of effectors, leading to bacterial cell death and thus abortive phage infection. A type II-A(GA) CBASS system (PubMed:32839535). Phospholipase that is activated upon binding to the cyclic dinucleotide (CDN) second messenger 3',3'-cyclic GMP-AMP (3',3'-cGAMP). Protects E.coli against phage infection. When capV and dncV are introduced in E.coli MG1655 there is 1000-fold protection against phage P1; protection against other phage (T2, T4, T5, T6 and lambda-vir) requires the 2 subsequent genes (cap2 and cap3). Upon P1 phage infection the activating molecule is produced between 30 and 40 minutes. Activation leads to bacterial cell lysis and death, which occurs before the phage has finished its replication cycle, thus protecting non-infected bacteria by aborting the phage infection and preventing its propagation. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 2-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) 1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phosphoethanolamine + 2 H2O = 2 (9Z)-octadecenoate + 2 H(+) + sn-glycero-3-phosphoethanolamine Phospholipase activity is specifically activated upon 3',3'-cGAMP binding, which is produced by the cognate cyclic nucleotide synthase encoded in the same operon. Part of the CBASS operon consisting of capV-dncV-cap2-cap3. The sequence of this protein is available under the NCBI RefSeq accession WP_001286317.1. Belongs to the patatin family.