PMID: 708719Oct 11, 1978Paper

Glutamate metabolism in relation to glutamate transport in kidney cortex mitochondria of rabbit

Biochimica Et Biophysica Acta
J Bryła, J M Dzik


1. The metabolism of glutamate was followed by measurements of phosphoenolpyruvate production, aspartate synthesis and ammonia release, whereas the transport of glutamate across the inner membrane of kidney cortex mitochondria was studied using an oxygen electrode and the swelling technique. 2. When added separately, avenaciolide and aminooxyacetate only partially inhibited both State 3 and uncoupled respiration of the mitochondria, as studied in the presence of glutamate as substrate. In contrast, the addition of both inhibitors to the reaction medium resulted in an almost complete inhibition of glutamate oxidation. 3. Swelling of kidney mitochondria in an isosmotic solution of ammonium glutamate was accelerated by uncoupler and inhibited by avenaciolide, while the swelling of mitochondria in potassium glutamate was stimulated by valinomycin and inhibited by uncoupler. 4. When glutamate was used as the sole substrate, inhibition of aspartate formation by aminooxyacetate resulted in a stimulation of both ammonia release and phosphoenolpyruvate production. In contrast, with glutamate plus malate as substrate an elevation of the rate of glutamate deamination on the addition of aminooxyacetate was accompanied by an inhibition of p...Continue Reading


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Jan 1, 1980·Pharmacology & Therapeutics·J Bryla
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