Acquired interbacterial defense (AID)

Occurrence of acquired interbacterial defense (AID) gene clusters in Bacteroidales residing within the human gut microbiome. These clusters encode arrays of immunity genes that protect against T6SS-mediated intra- and inter-species bacterial antagonism
Ross et al. 2019b Nature 575: 224–228

The orphan immunity genes of multiple Bacteroides spp. – localized to AID systems – can confer protection against effectors delivered by the T6SS of B. fragilis
Ross et al. 2019b Nature 575: 224–228

Homologs of B. fragilis T6S immunity genes i6 and i7 are located together within discrete gene clusters, which we termed AID-1 (acquired interbacterial defense 1) systems, in several Bacteroides strains
Ross et al. 2019b Nature 575: 224–228

in both B. ovatus and B. fragilis, AID-1 system genes grant immunity against corresponding T6S effectors
Ross et al. 2019b Nature 575: 224–228

see also:
Bte1
Defense Systems / Defense Mechanisms