methylobacterium frigidaeris methylobacterium frigidaeris methylobacterium frigidaeris is a gram-negative, aerobic, methylotrophic and motile bacteria from the genus of methylobacterium which has been isolated from an air conditioning system from korea. methylobacterium frigidaeris scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: methylobacteriaceae genus: methylobacterium species: m. frigidaeris binomial name methylobacterium frigidaerislee and jeon 2018 type strain jcm 32048, kacc 19280, strain ier25-16