Immunocytochemical localization of urate oxidase, fatty acyl-CoA oxidase, and catalase in bovine kidney peroxisomesN Usuda, MI Usman, MK Reddy, T Hashimoto, JK Reddy and MS Rao Department of Pathology, Northwestern University Medical School, Chicago, Illinois 60611. We investigated the localization of urate oxidase, peroxisomal fatty acyl-CoA oxidase, and catalase in bovine kidney by immunoblot analysis and protein A-gold immunocytochemistry, using the respective polyclonal monospecific antibodies raised against the enzymes purified from rat liver. By immunoblot analysis, these three proteins were detected in bovine kidney and bovine liver homogenates. Subcellular localization of these three enzymes in kidney was ascertained by protein A-gold immunocytochemical staining of Lowicryl K4M-embedded tissue. Peroxisomes in bovine kidney cortical epithelium possessed crystalloid cores or nucleoids, which were found to be the exclusive sites of urate oxidase localization. The limiting membrane, the marginal plate, and the matrix of renal peroxisomes were negative for urate oxidase staining. In contrast, catalase and fatty acyl-CoA oxidase were found in the peroxisome matrix. These results demonstrate that, unlike rat kidney peroxisomes which lack urate oxidase, peroxisomes of bovine kidney contain this enzyme as well as peroxisomal fatty acyl-CoA oxidase.
Volume 36,
Issue 3,
pp. 253-258,
03/01/1988
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Z. Zhou and Y. J. Kang Cellular and Subcellular Localization of Catalase in the Heart of Transgenic Mice J. Histochem. Cytochem., May 1, 2000; 48(5): 585 - 594. [Abstract] [Full Text] |
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N. Usuda, K. Johkura, T. Hachiya, and A. Nakazawa Immunoelectron Microscopy of Peroxisomes Employing the Antibody for the SKL Sequence PTS1 C-terminus Common to Peroxisomal Enzymes J. Histochem. Cytochem., September 1, 1999; 47(9): 1119 - 1126. [Abstract] [Full Text] |
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N Usuda, S Hayashi, S Fujiwara, T Noguchi, T Nagata, M. Rao, K Alvares, J. Reddy, and A. Yeldandi Uric acid degrading enzymes, urate oxidase and allantoinase, are associated with different subcellular organelles in frog liver and kidney J. Cell Sci., January 4, 1994; 107(4): 1073 - 1081. [Abstract] [PDF] |
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