Anti-CBASS protein 2

UniProtKB accession:  A0A1C8HPQ3

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UniProtKB description:  Antagonizes CBASS (cyclic oligonucleotide-based antiphage signaling system) (PubMed:36750095). Binds and sequesters host-produced 3',3'-cyclic GMP-AMP (cGAMP) with a dissociation constant of about 87 nM; each homohexamer binds 3 cGAMP molecules with 1 cGAMP molecule binding to 2 monomers (PubMed:36750095). Sequestration of cGAMP inhibits the cGAMP-activated phospholipase activity of host CBASS effector protein CapV (PubMed:36750095). Does not degrade the cyclic nucleotide (PubMed:36750095). Also binds other cyclic dinucleotides including; 2',3'-cyclic GMP-AMP, cyclic-di-AMP, c-di-UMP and c-UMP-AMP with high affinity, only weakly to c-UMP-GMP and not to cyclic-di-GMP (PubMed:36750095). Also antagonizes the effector protein of P.aeruginosa type I-A and type I-B CBASS systems (capV in ATCC 33351 and a membrane protein in strain JD332 respectively) (PubMed:36750095).