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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sorrentino, D. Wada, H. Potter, B. J. Stump, D. Thung, S. Kiang, C. L. Zhou, S. L. Berk, P. D. Horio, Y. Isola, L. M. |
| Description | Author Affiliation: Berk PD ( Department of Medicine (Hepatic Research Group), Mount Sinai School of Medicine, New York, NY 10029.); |
| Abstract | The hepatic plasma membrane fatty acid-binding protein (h-FABPPM) and the mitochondrial isoenzyme of glutamic-oxaloacetic transaminase (mGOT) of rat liver have similar amino acid compositions and identical amino acid sequences for residues 3-24. Both proteins migrate with an apparent molecular mass of 43 kDa on SDS/polyacrylamide gel electrophoresis, have a similar pattern of basic charge isomers on isoelectric focusing, are eluted similarly from four different high-performance liquid chromatographic columns, have absorption maxima at 435 nm under acid conditions and 354 nm at pH 8.3, and bind oleate with a Ka approximately 1.2-1.4 x 10(7) M-1. Sinusoidally enriched liver plasma membranes and purified h-FABPPM have GOT enzymatic activity; the relative specific activities (units/mg) of the membranes and purified protein suggest that h-FABPPM constitutes 1-2% of plasma membrane protein in the rat hepatocyte. Monospecific rabbit antiserum against h-FABPPM reacts on Western blotting with mGOT, and vice versa. Antisera against both proteins produce plasma membrane immunofluorescence in rat hepatocytes and selectively inhibit the hepatocellular uptake of [3H]oleate but not that of [35S]sulfobromophthalein or [14C]taurocholate. The inhibition of oleate uptake produced by anti-h-FABPPM can be eliminated by preincubation of the antiserum with mGOT; similarly, the plasma membrane immunofluorescence produced by either antiserum can be eliminated by preincubation with the other antigen. These data suggest that h-FABPPM and mGOT are closely related. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 9 |
| Volume Number | 87 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1990-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Aspartate Aminotransferases Genetics Carrier Proteins Liver Metabolism Mitochondria, Liver Enzymology Neoplasm Proteins Nerve Tissue Proteins Amino Acid Sequence Animals Antibodies, Monoclonal Isolation & Purification Blotting, Western Cell Membrane Cells, Cultured Chromatography, High Pressure Liquid Fatty Acid-Binding Proteins Fatty Acids Fluorescent Antibody Technique Kinetics Ultrastructure Microscopy, Electron Oleic Acid Oleic Acids Comparative Study Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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