A synthetic peptide from human SDHA
A synthesized peptide derived from human SDHB, corresponding to a region within the internal amino acids.
Succinate dehydrogenase (SDH) complex is a key respiratory enzyme composed of four subunits, SDHA, SDHB, SDHC and SDHD. SDHB was expressed in the cytoplasm of normal cells, but absent in abnormal cells. SDHB mutations can lead to oncogenesis of pheochromocytoma, causing a class of tumors called succinate dehydrogenase-deficient tumors, including hereditary paraganglioma and hereditary pheochromocytoma, succinate dehydrogenase-deficient renal carcinoma, and succinate dehydrogenase-deficient gastrointestinal stromal tumor (GIST).
Complex II of the respiratory chain, which is specifically involved in the oxidation of succinate, carries electrons from FADH to CoQ. The complex is composed of four nuclear-encoded subunits and is localized in the mitochondrial inner membrane. The iron-sulfur subunit is highly conserved and contains three cysteine-rich clusters which may comprise the iron-sulfur centers of the enzyme. Sporadic and familial mutations in this gene result in paragangliomas and pheochromocytoma, and support a link between mitochondrial dysfunction and tumorigenesis.
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