ATP depletion increases phosphorylation of elongation factor eEF2 in adult cardiomyocytes independently of inhibition of mTOR signalling


McLeod, L.E. and Proud, C.G. (2002) ATP depletion increases phosphorylation of elongation factor eEF2 in adult cardiomyocytes independently of inhibition of mTOR signalling. Federation of European Biochemical Societies (FEBS) Letters, 531, (3), 448-452.

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Description/Abstract

Translation elongation consumes a high proportion of cellular energy and can be regulated by phosphorylation of elongation factor eEF2 which inhibits its activity. We have studied the effects of ATP depletion on the phosphorylation of eEF2 in adult rat ventricular cardiomyocytes. Energy depletion rapidly leads to inhibition of protein synthesis and increased phosphorylation of eEF2. Stimulation of the AMP-activated protein kinase also causes increases eEF2 phosphorylation. Only at later times is an effect on mTOR signalling observed. These data suggest that energy depletion leads to inhibition of protein synthesis through phosphorylation of eEF2 independently of inhibition of mTOR signalling.

Item Type: Article
ISSNs: 0014-5793 (print)
Related URLs:
Keywords: protein synthesis, elongation, mTOR, ATP, AMP-activated protein kinase, Cardiomyocyte
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Divisions: University Structure - Pre August 2011 > School of Biological Sciences
ePrint ID: 56672
Date Deposited: 07 Aug 2008
Last Modified: 27 Mar 2014 18:39
URI: http://eprints.soton.ac.uk/id/eprint/56672

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