Abstract
The pathways for the uptake and extrusion of Mg2+ by mitochondria are not well defined. the present evidence suggests that uptake occurs by nonspecific diffusive pathways in response to elevated membrane potential. There is disagreement as to some of the properties of Mg2+ efflux from mitochondria, but the reaction resembles K+ efflux in many ways and may occur in exchange for H+. Matrix free magnesium ion concentration, [Mg2+], can be measured using fluorescent probes and is set very close to cytosol [Mg2+] by a balance between influx and efflux and by the availability of ligands, such as Pi. There are indications that matrix [Mg2+] may be under hormonal control and that it contributes to the regulation of mitochondrial metabolism and transport reactions.
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Jung, D.W., Brierley, G.P. Magnesium transport by mitochondria. J Bioenerg Biomembr 26, 527–535 (1994). https://doi.org/10.1007/BF00762737
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DOI: https://doi.org/10.1007/BF00762737