Mitoguardin (Miga) was first identified in flies as a mitochondrial outer-membrane protein that promotes mitochondrial fusion. Later, the mammalian Miga homologues, Miga1 and Miga2, were identified. They are found to promote mitochondrial fusion by regulating mitochondrial phospholipid metabolism via MitoPLD [1, 2].

1: Mitoguardin Regulates Mitochondrial Fusion through MitoPLD and Is Required for Neuronal Homeostasis. Zhang Y, Liu X, Bai J, Tian X, Zhao X, Liu W, Duan X, Shang W, Fan HY, Tong C; Mol Cell. 2016;61:111-124. PMID:26711011

2: Mitoguardin-1 and -2 promote maturation and the developmental potential of mouse oocytes by maintaining mitochondrial dynamics and functions. Liu XM, Zhang YP, Ji SY, Li BT, Tian X, Li D, Tong C, Fan HY; Oncotarget. 2016;7:1155-1167. PMID:26716412