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Reduced Triphosphopyridine Nucleotide Oxidase-catalyzed Alterations of Membrane Phospholipids
Open accessAbstract
Fe3+ was shown to be required for enzyme-catalyzed peroxidative chain-scission of polyunsaturated fatty acids of phospholipids in liver microsomal membranes.The K, value for iron in the reaction is different from that of nonenzymic processes which cause similar alterations of phospholipids.The products of both reactions include malondialdehyde which was shown to be the only substance formed which reacts with thiobarbituric acid to form a pigment absorbing at 532 rnp.The enzymic reaction proceeds first through the formation of peroxides on the j?3 position polyunsaturated fatty acids followed by cleavage of the carbon chain to yield cat-bony1 compounds.Iron was shown to be required for formation of the phospholipid peroxides.The activity of the enzymic system in microsomes could be reduced to low levels by washing the particles several times in iron-free media.Activity could be restored by addition of Fe3f to the assay system.The results suggest that TPNH-dependent oxidation processes may contribute to the normal catabolism of phospholipids in microsomal membranes.
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Cites
Photoperoxidation in isolated chloroplasts
Heath, R. L., & Packer, L. (1968) · Archives of Biochemistry and Biophysics · doi:10.1016/0003-9861(68)90654-1 · Cited by 11,413
Cited by
Janero, D. R. (1990) · Free Radical Biology and Medicine · doi:10.1016/0891-5849(90)90131-2 · Cited by 2,722
Lipid Peroxidation and Mechanisms of Toxicity
Horton, A. A., Fairhurst, S., & Bus, J. S. (1987) · CRC Critical Reviews in Toxicology · doi:10.3109/10408448709089856 · Cited by 339
Effect of metal ions on the rearrangement of dopachrome
PALUMBO, A., DISCHIA, M., MISURACA, G., & PROTA, G. (1987) · Biochimica et Biophysica Acta (BBA) - General Subjects · doi:10.1016/0304-4165(87)90110-3 · Cited by 158
Structural modifications in biosynthetic melanins induced by metal ions
Palumbo, A., d'Ischia, M., Misuraca, G., Prota, G., & Schultz, T. M. (1988) · Biochimica et Biophysica Acta (BBA) - General Subjects · doi:10.1016/0304-4165(88)90166-3 · Cited by 83
Iron uptake and iron limited growth of Escherichia coli K-12
Hartmann, A., & Braun, V. (1981) · Archives of Microbiology · doi:10.1007/bf00414599 · Cited by 60
Metadata
- Authors
- Poyer, J. L., & McCay, P. B.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1971-01
- Volume
- 246
- Issue
- 1
- Pages
- 263-269
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1605411651
- Cited by
- 220
- References
- 1
- FWCI
- 12.23
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Poyer, J. L., & McCay, P. B. (1971). Reduced Triphosphopyridine Nucleotide Oxidase-catalyzed Alterations of Membrane Phospholipids. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(18)62558-x
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
