菜单 基因医生

该基因编码多酶丙酮酸脱氢酶复合物（PDC）的组分E2PDC位于线粒体内膜，催化丙酮酸转化为乙酰辅酶A。该基因的蛋白质产物，二氢脂酰胺乙酰转移酶接受丙酮酸氧化脱羧基形成的乙酰基并将其转移到辅酶A。二氢硫酰胺乙酰转移酶是抗线粒体抗体的抗原。这些自身抗体存在于近95%的自身免疫性肝病原发性胆汁性肝硬化（PBC）患者中在pbc中，活化的t淋巴细胞攻击并破坏胆管上皮细胞，在那里这种蛋白异常分布和过度表达。PBC可导致肝硬化和肝功能衰竭该基因的突变也是丙酮酸脱氢酶E2缺乏症的一个原因，丙酮酸脱氢酶E2缺乏症导致婴儿和幼儿期原发性乳酸酸中毒
This gene encodes component E2 of the multi-enzyme pyruvate dehydrogenase complex (PDC). PDC resides in the inner mitochondrial membrane and catalyzes the conversion of pyruvate to acetyl coenzyme A. The protein product of this gene, dihydrolipoamide acetyltransferase, accepts acetyl groups formed by the oxidative decarboxylation of pyruvate and transfers them to coenzyme A. Dihydrolipoamide acetyltransferase is the antigen for antimitochondrial antibodies. These autoantibodies are present in nearly 95% of patients with the autoimmune liver disease primary biliary cirrhosis (PBC). In PBC, activated T lymphocytes attack and destroy epithelial cells in the bile duct where this protein is abnormally distributed and overexpressed. PBC enventually leads to cirrhosis and liver failure. Mutations in this gene are also a cause of pyruvate dehydrogenase E2 deficiency which causes primary lactic acidosis in infancy and early childhood.[provided by RefSeq, Oct 2009]