Enzyme Regulation in C4 Photosynthesis 12: PURIFICATION AND PROPERTIES OF THIOREDOXIN-LINKED NADP-MALATE DEHYDROGENASE FROM CORN LEAVES
AUTOR(ES)
Jacquot, Jean-Pierre P.
RESUMO
NADP-malate dehydrogenase, a light-modulated enzyme of C4 photosynthesis, was purified to homogeneity from leaves of corn. The pure enzyme was activated by thioredoxin m that was reduced either photochemically (with ferredoxin and ferredoxin-thioredoxin reductase) or chemically (with dithiothreitol). Unactivated corn leaf NADP-malate dehydrogenase had a molecular weight of 50,000 to 60,000 and was chromophorefree. The enzyme appeared to have a high content of serine and glycine and to contain both S—S and SH groups. Consequently, NADP-malate dehydrogenase seems to be capable of undergoing reversible oxidation/reduction during its photoregulation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=427479Documentos Relacionados
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