Human centrosomal epitope is shared specifically with human lactate dehydrogenase-B isozyme

• Published in: FEBS letters 1992-03, Vol.299 (3), p.231-234
• Main Authors: Gosti, F., Li, S.S.L., Maunoury, R., Bornens, M.
• Format: Article
• Language: English
• Subjects: Analytical, structural and metabolic biochemistry; Biological and medical sciences; Biological Evolution; Cell Line; Centrioles - immunology; Centrosome; centrosomes; Enzymes and enzyme inhibitors; epitopes; Epitopes - immunology; Fluorescent Antibody Technique; Fundamental and applied biological sciences. Psychology; homology; Human hepatic cell; Humans; Isoenzymes; L-Lactate Dehydrogenase - immunology; lactate dehydrogenase; LDH-B; Life Sciences; liver; man; Oxidoreductases; Tumor Cells, Cultured; Vegetal Biology
• ISSN: 0014-5793; 1873-3468
• DOI: 10.1016/0014-5793(92)80121-V

A rabbit serum (0013) used to identify pericentriolar proteins from isolated centrosomes (Gosti-Testu, F., Marty, M.C., Berges, J., Maunoury, R. and Bornens, M. (1986) EMBO J. 5, 2545–2550) was shown also to react through the same epitope with several non-centrosomal proteins including a major 36 kDa cytosolic antigen. This protein was identified to be human lactate dehydrogenase and the co-distribution of 0013 epitope on the centrosomal protein and on lactate dehydrogenase (LDH) was shown to be specific for human cells (Gosti, F., Marty, M.C., Courvalin, J.C., Maunoury, R. and Bornens, M. (1987) Proc. Natl. Acad. Sci. USA 84, 1000–1004). Human hepatic cells constitute, so far, the only exception to this co-distribution rule. By using this cell type which expresses only the LDH-A4 isozyme, we demonstrate that 0013 epitope is specific for the human LDH-B subunit, making serum 0013 the strongest anti-LDH-B available so far. The evolutionary and physiological significance of this situation is discussed.