Compartmentation of peroxisomal enzymes in algae of the group of Prasinophyceae. Occurrence of possible microbodies without catalase

Using the Prasinophycean algae Platymonas, Heteromastix, Pedinomonas, and Pyramimonas, subcellular distribution of the enzymes of glycolate metabolism and beta-oxidation pathway have been studied. Glycolate dehydrogenase, hydroxypyruvate reductase, and glutamate-glyoxylate aminotransferase are locat...

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Published in:Plant physiology (Bethesda) 1989-06, Vol.90 (2), p.754-759
Main Authors: Stabenau, H. (Universitat Oldenburg, Oldenburg, Federal Republic of Germany), Winkler, U, Saftel, W
Format: Article
Language:English
Subjects:
Algae
Biological and medical sciences
CHLOROPHYCEAE
ENZIMAS
ENZYME
Enzymes
Fundamental and applied biological sciences. Psychology
Glycolates
Green algae
Growth regulators
MASTIGOPHORA
Metabolism
METABOLISME
METABOLISMO
Microbodies
Mitochondria
Organelles
OXIDACION
Oxidases
OXYDATION
Peroxisomes
Plant physiology and development
Plants
VIA METABOLICA FOTORESPIRACION
VOIE DU METABOLISME RESPIRATOIRE
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Summary:Using the Prasinophycean algae Platymonas, Heteromastix, Pedinomonas, and Pyramimonas, subcellular distribution of the enzymes of glycolate metabolism and beta-oxidation pathway have been studied. Glycolate dehydrogenase, hydroxypyruvate reductase, and glutamate-glyoxylate aminotransferase are located in the mitochondria. In addition, the mitochondria of all four species contain acyl-coenzyme A (CoA) dehydrogenase, enoyl-CoA hydratase, and thiolase. In Platymonas, Heteromastix, and Pedinomonas, organelles with the characteristic structure of peroxisomes have been detected which also contain the enzymes acyl-CoA oxidase, enoyl-CoA hydratase and thiolase. However, catalase could not be demonstrated in either the peroxisome-like organelles or in the whole cells
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.90.2.754