该基因属于铁锰超氧化物歧化酶家族。它编码一种线粒体蛋白，形成一个同四聚体，每个亚单位结合一个锰离子。这种蛋白质与氧化磷酸化的超氧化物副产物结合，并将其转化为过氧化氢和双原子氧。该基因突变与特发性心肌病（IDC）、早衰、散发性运动神经元疾病和癌症有关。该基因的选择性剪接导致多个转录变体。在1号染色体上发现了一个相关的假基因。[由RefSeq提供，2016年4月]
This gene is a member of the iron/manganese superoxide dismutase family. It encodes a mitochondrial protein that forms a homotetramer and binds one manganese ion per subunit. This protein binds to the superoxide byproducts of oxidative phosphorylation and converts them to hydrogen peroxide and diatomic oxygen. Mutations in this gene have been associated with idiopathic cardiomyopathy (IDC), premature aging, sporadic motor neuron disease, and cancer. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene has been identified on chromosome 1. [provided by RefSeq, Apr 2016]