The channel-kinase TRPM7 regulates phosphorylation of the translational factor eEF2 via eEF2-k.
The channel-kinase TRPM7 regulates phosphorylation of the translational factor eEF2 via eEF2-k.
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DOI:
10.1016/j.cellsig.2010.11.011
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发表时间:
2011-03
影响因子:
4.8
通讯作者:
Schmitz C
中科院分区:
文献类型:
--
作者:
Perraud AL;Zhao X;Ryazanov AG;Schmitz C
Protein translation is an essential but energetically expensive process, which is carefully regulated in accordance to the cellular nutritional and energy status. Eukaryotic elongation factor 2 (eEF2) is a central regulation point since it mediates ribosomal translocation, and can be inhibited by phosphorylation at Thr56. TRPM7 is the unique fusion of an ion channel with a functional Ser/Thr-kinase. While TRPM7’s channel function has been implicated in regulating vertebrate Mg2+-uptake required for cell growth, the function of its kinase domain remains unclear. Here, we show that under conditions where cell growth is limited by Mg2+-availability, TRPM7 via its kinase mediates enhanced Thr56-phosphorylation of eEF2. TRPM7-kinase does not appear to directly phosphorylate eEF2, but rather to influence the amount of eEF2’s cognate kinase eEF2-k, involving its phosphorylation at Ser77. These findings suggest that TRPM7’s structural duality ensures ideal positioning of its kinase in close proximity to channel-mediated Mg2+ uptake, allowing for the adjustment of protein translational rates to the availability of Mg2+.
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DOI:
10.1085/jgp.20028551
发表时间:
2002-05
期刊:
The Journal of general physiology
影响因子:
--
作者:
Prakriya M;Lewis RS
通讯作者:
Lewis RS
影响因子:
3.9
作者:
Rubin, Harry
通讯作者:
Rubin, Harry
影响因子:
3.5
作者:
Clark, Kristopher;Middelbeek, Jeroen;van Leeuwen, Frank N.
通讯作者:
van Leeuwen, Frank N.
DOI:
10.1073/pnas.94.10.4884
发表时间:
1997-05-13
影响因子:
11.1
作者:
Ryazanov, AG;Ward, MD;Hait, WN
通讯作者:
Hait, WN
DOI:
10.1073/pnas.86.24.9652
发表时间:
1989-12-01
影响因子:
11.1
作者:
HOROWITZ, SB;TLUCZEK, LJM
通讯作者:
TLUCZEK, LJM