“…Different types of putative SQRs were detected in a large variety of proteobacterial genera in which a pMMO and/or sMMO was present, such as Methylobacter , Methylocaldum , Methylocapsa , Methylococcus , Methylocystis , Methylomagnum , Methylomarinum , Methylomicrobium , Methylomonas , Methyloprofundus , Methylosinus , Methylospira , Methyloterricola , Methylotetracoccus , Methylotuvimicrobium and Methylovulum . In addition, the recently isolated alphaproteobacterium ‘ Methylovirgula thiovorans ’ strain HY1 encodes a type I SQR (Gwak et al, 2022). In contrast, verrucomicrobial methanotrophs possess genes encoding a type III SQR, comprising bacterial and archaeal SQRs of which the least is known (Marcia et al, 2010).…”