這個基因編碼呼吸鏈復合物ii的一個成員，負責琥珀酸的氧化。編碼蛋白是將復合物錨定在線粒體內膜基質側的兩個完整膜蛋白之一。該基因突變與腫瘤的形成有關，包括遺傳性副神經節瘤。疾病的傳播幾乎完全通過父系等位基因發生，這表明該位點可能是母系印記。這個基因在1號、2號、3號、7號和18號染色體上有假基因。選擇性剪接導致多個轉錄變體。
This gene encodes a member of complex II of the respiratory chain, which is responsible for the oxidation of succinate. The encoded protein is one of two integral membrane proteins anchoring the complex to the matrix side of the mitochondrial inner membrane. Mutations in this gene are associated with the formation of tumors, including hereditary paraganglioma. Transmission of disease occurs almost exclusively through the paternal allele, suggesting that this locus may be maternally imprinted. There are pseudogenes for this gene on chromosomes 1, 2, 3, 7, and 18. Alternative splicing results in multiple transcript variants.