Abstract: The present invention relates to Akkermansia muciniphila SNUG-61027 strain (accession number KCTC 13530BP) and use thereof, specifically, a composition for suppressing appetite or preventing, ameliorating, alleviating or treating metabolic diseases, comprising the strain, or a culture solution thereof, etc. or a B2UM07 protein isolated therefrom as an active ingredient, and use thereof for suppressing appetite or preventing, ameliorating, alleviating or treating metabolic diseases, and a method of suppressing appetite or preventing, ameliorating, alleviating or treating metabolic diseases using the same are provided. Through this, among the anti-obesity effects, not only weight reduction and glucose homeostasis regulation, but also the effect on brown fat and the effect of secreting appetite regulating hormones are exhibited.