PTENα, a PTEN isoform translated through alternative initiation, regulates mitochondrial function and energy metabolism.
PTENα, a PTEN isoform translated through alternative initiation, regulates mitochondrial function and energy metabolism.
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DOI:
10.1016/j.cmet.2014.03.023
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发表时间:
2014-05-06
期刊:
影响因子:
29
通讯作者:
Yin Y
中科院分区:
文献类型:
--
作者:
Liang H;He S;Yang J;Jia X;Wang P;Chen X;Zhang Z;Zou X;McNutt MA;Shen WH;Yin Y
PTEN is one of the most frequently mutated genes in human cancer. It is known that PTEN has a wide range of biological functions beyond tumor suppression. Here we report that PTENα, an N-terminally extended form of PTEN, functions in metabolism. Translation of PTENα is initiated from a CUG codon upstream of and in-frame with the coding region of canonical PTEN. Eukaryotic translation initiation factor 2A (eIF2A) controls PTENα translation and a CUG-centered palindromic motif is required in this process. PTENα induces cytochrome c oxidase activity and ATP production in mitochondria. TALEN-mediated somatic deletion of PTENα impairs mitochondrial respiratory chain function. We show that PTENα interacts with canonical PTEN to increase PINK1 and promote energy production. These data provide insights into the mechanism by which the PTEN family is involved in multiple cellular processes. Our studies suggest that mammalian cells can use alternate translation initiation mechanisms to generate protein isoforms.
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DOI:
10.1073/pnas.96.4.1563
发表时间:
1999-02-16
影响因子:
11.1
作者:
Podsypanina, K;Ellenson, LH;Parsons, R
通讯作者:
Parsons, R