Phosphorylation stoichiometries of human eukaryotic initiation factors.
Phosphorylation stoichiometries of human eukaryotic initiation factors.
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DOI:
10.3390/ijms150711523
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发表时间:
2014-06-27
影响因子:
5.6
通讯作者:
Leary JA
中科院分区:
文献类型:
--
作者:
Andaya A;Villa N;Jia W;Fraser CS;Leary JA
Eukaryotic translation initiation factors are the principal molecular effectors regulating the process converting nucleic acid to functional protein. Commonly referred to as eIFs (eukaryotic initiation factors), this suite of proteins is comprised of at least 25 individual subunits that function in a coordinated, regulated, manner during mRNA translation. Multiple facets of eIF regulation have yet to be elucidated; however, many of the necessary protein factors are phosphorylated. Herein, we have isolated, identified and quantified phosphosites from eIF2, eIF3, and eIF4G generated from log phase grown HeLa cell lysates. Our investigation is the first study to globally quantify eIF phosphosites and illustrates differences in abundance of phosphorylation between the residues of each factor. Thus, identification of those phosphosites that exhibit either high or low levels of phosphorylation under log phase growing conditions may aid researchers to concentrate their investigative efforts to specific phosphosites that potentially harbor important regulatory mechanisms germane to mRNA translation.
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