Members of this family of bacterial proteins are required for the attachment of the bacterium to host cells [1][2]. Furthermore, it has been reported that this family includes bacterial family of the archaeo-eukaryotic release factor superfamily, lacks fusions to N-terminal codon recognition domain and C-terminal Pelota domain. Likely to play roles in biological conflicts or regulation under stress conditions at the ribosome [3].

1: A region of the Agrobacterium tumefaciens chromosome containing genes required for virulence and attachment to host cells. Matthysse AG, Yarnall H, Boles SB, McMahan S; Biochim Biophys Acta. 2000;1490:208-212. PMID:10786639

2: Comparison of the genomes of two Xanthomonas pathogens with differing host specificities. da Silva AC, Ferro JA, Reinach FC, Farah CS, Furlan LR, Quaggio RB, Monteiro-Vitorello CB, Van Sluys MA, Almeida NF, Alves LM, do Amaral AM, Bertolini MC, Camargo LE, Camarotte G, Cannavan F, Cardozo J, Chambergo F, Ciapina LP, Cicarelli RM, Coutinho LL, Nature. 2002;417:459-463. PMID:12024217

3: Vms1 and ANKZF1 peptidyl-tRNA hydrolases release nascent chains from stalled ribosomes. Verma R, Reichermeier KM, Burroughs AM, Oania RS, Reitsma JM, Aravind L, Deshaies RJ; Nature. 2018;557:446-451. PMID:29632312