Dual role for the ADP/ATP translocator?

Andrew P. Halestrap ()
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Andrew P. Halestrap: University of Bristol

Nature, 2004, vol. 430, issue 7003, 984-984

Abstract: Abstract Arising from: J. E. Kokoszka et al. Nature 427, 461–464 (2004) The ADP/ATP translocator (or adenine nucleotide translocase; ANT) is thought to play a dual role: in the transport of ADP and ATP across the mitochondrial inner membrane and in the formation of the mitochondrial permeability-transition pore (mtPTP), a nonspecific pore that is an important mediator of apoptosis (programmed cell death)1,2,3. However, Kokoszka et al.4 have shown that mitochondria from livers of ‘ANT-knockout’ mice, in which the ANT has been genetically inactivated, still possess mtPTP activity. From this, the authors conclude that the ANT is a non-essential component of the mtPTP that may be dispensable for mtPTP-associated cell death4. These results, which contradict previous evidence1,2 and cast doubt on a widely accepted model for the mtPTP (ref. 1), warrant scrutiny and call for a fundamental reappraisal of the role of the ANT in liver metabolism.

Date: 2004
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DOI: 10.1038/nature02816

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