Mitochondrial inner membrane magnesium transporter required for mitochondrial magnesium homeostasis (By similarity). Involved in the development of the sporozoite in the mosquito vector midgut (PubMed:26796412). Severe decrease in the number of sporozoites in the mosquito salivary gland (PubMed:26796412). Normal asexual stage in mouse erythrocytes and normal exflagellation of male gametocytes (PubMed:26796412). Belongs to the CorA metal ion transporter (MIT) (TC 1.A.35) family.