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β Oxidation in Glyoxysomes from Castor Bean Endosperm
Open accessAbstract
Crude particulate preparations from castor bean endosperm contain most of the β oxidation activity present in initial extracts. Measurements on organelles separated by sucrose density centrifugation of the crude particles show that glyoxysomes (density 1.25) contain more than 80% of the particulate β oxidation activity, with virtually none in the mitochondria (density 1.19). Thiolase shows a similar distribution. Glyoxysomes do not oxidize NADH, but O2 is required for β oxidation. Addition of palmitoyl coenzyme A to glyoxysomes results in O2 uptake, NADH accumulation, and acetyl-CoA production, in a 0.5:1:1 stoichiometry. Cyanide has no effect on NADH accumulation, but doubles the rate of O2 uptake. These data are consistent with an O2-requiring oxidation of the prosthetic group of acyl-CoA dehydrogenase to yield H2O2, which is broken down by catalase in the glyoxysome. Acetyl-CoA produced by β oxidation is consumed in the glyoxylate cycle, which is also located in this organelle.
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Cited by
Reddy, J. K., & Hashimoto, T. (2001) · Annual Review of Nutrition · doi:10.1146/annurev.nutr.21.1.193 · Cited by 959
Harwood, J. (1988) · Annual Review of Plant Physiology and Plant Molecular Biology · doi:10.1146/annurev.arplant.39.1.101 · Cited by 668
Peroxisomes: A Nexus for Lipid Metabolism and Cellular Signaling
Lodhi, I. J., & Semenkovich, C. F. (2014) · Cell Metabolism · doi:10.1016/j.cmet.2014.01.002 · Cited by 605
Rat liver peroxisomes catalyze the beta oxidation of fatty acids.
Lazarow, P. B. (1978) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(17)34897-4 · Cited by 607
QIN, Y.-M., POUTANEN, M. H., HELANDER, H. M., KVIST, A.-P., SIIVARI, K. M., SCHMITZ, W., CONZELMANN, E., HELLMAN, U., & HILTUNEN, J. K. (1997) · Biochemical Journal · doi:10.1042/bj3210021 · Cited by 107
Metadata
- Authors
- Cooper, T. G., & Beevers, H.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1969-07
- Volume
- 244
- Issue
- 13
- Pages
- 3514-3520
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1601083871
- Cited by
- 330
- References
- 0
- FWCI
- 6.44
- Type
- journal article
- Language
- en
- Open access
- hybrid
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