期刊
JOURNAL OF PLANT PHYSIOLOGY
卷 156, 期 1, 页码 126-129出版社
GUSTAV FISCHER VERLAG
DOI: 10.1016/S0176-1617(00)80283-7
关键词
mitochondria; potato (Solanum tuberosum L.); thioredoxin; thioredoxin reductase; Western blots
Plant mitochondria contain one or two specific mt-thioredoxins which participate, inter alia, in the regulation of the ketoglutarate dehydrogenase complex. The presence of thioredoxin reductase, second component of a typical thioredoxin system inside mitochondria has, however, remained uncertain. We here show that potato tuber mitochondrial lysates contain an enzyme of 40 kDa monomer mass, utilizing NADPH and plant (but not bacterial) thioredoxins as substrates, It is distinct From a 35 kDa reductase of cytosolic origin. Plants thus contain a third thioredoxin reductase, mt-NTR, in addition to the known NTR and ferredoxin-dependent FTR enzyme.
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