Regulation of mitochondrial calcium in plants versus animals - PubMed (original) (raw)

Review

. 2016 Jun;67(13):3809-29.

doi: 10.1093/jxb/erw100. Epub 2016 Mar 21.

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Review

Regulation of mitochondrial calcium in plants versus animals

Stephan Wagner et al. J Exp Bot. 2016 Jun.

Abstract

Ca(2+) acts as an important cellular second messenger in eukaryotes. In both plants and animals, a wide variety of environmental and developmental stimuli trigger Ca(2+) transients of a specific signature that can modulate gene expression and metabolism. In animals, mitochondrial energy metabolism has long been considered a hotspot of Ca(2+) regulation, with a range of pathophysiology linked to altered Ca(2+) control. Recently, several molecular players involved in mitochondrial Ca(2+) signalling have been identified, including those of the mitochondrial Ca(2+) uniporter. Despite strong evidence for sophisticated Ca(2+) regulation in plant mitochondria, the picture has remained much less clear. This is currently changing aided by live imaging and genetic approaches which allow dissection of subcellular Ca(2+) dynamics and identification of the proteins involved. We provide an update on our current understanding in the regulation of mitochondrial Ca(2+) and signalling by comparing work in plants and animals. The significance of mitochondrial Ca(2+) control is discussed in the light of the specific metabolic and energetic needs of plant and animal cells.

Keywords: Bioenergetics; Ca2+; ion channels; ion transporters; mitochondria..

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