Proteomics

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Phosphorylation of Ribosomal Protein RPS6 Integrates Light Signals and Circadian Clock Signals

ABSTRACT: The translation of mRNA into protein is tightly regulated by the light environment as well as by the circadian clock. Although changes in translational efficiency have been well documented at the level of mRNA-ribosome loading, the underlying mechanisms are unclear. The reversible phosphorylation of RIBOSOMAL PROTEIN OF THE SMALL SUBUNIT 6 (RPS6) has been known for forty years, but the biochemical significance of this event remains unclear to this day. Here, we confirm using a clock-deficient strain of Arabidopsis thaliana that RPS6 phosphorylation (RPS6-P) is controlled by the diel light-dark cycle with a peak during the day.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)

TISSUE(S): Leaf

SUBMITTER: Paul Abraham  

LAB HEAD: Paul E.Abraham

PROVIDER: PXD008125 | Pride | 2018-08-16

REPOSITORIES: Pride

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Easy_nLC_1ug_6AM_Rep1_StageTip_AC30cm_01.mzML Mzml
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Phosphorylation of Ribosomal Protein RPS6 Integrates Light Signals and Circadian Clock Signals.

Enganti Ramya R   Cho Sung Ki SK   Toperzer Jody D JD   Urquidi-Camacho Ricardo A RA   Cakir Ozkan S OS   Ray Alexandria P AP   Abraham Paul E PE   Hettich Robert L RL   von Arnim Albrecht G AG  

Frontiers in plant science 20180119

The translation of mRNA into protein is tightly regulated by the light environment as well as by the circadian clock. Although changes in translational efficiency have been well documented at the level of mRNA-ribosome loading, the underlying mechanisms are unclear. The reversible phosphorylation of RIBOSOMAL PROTEIN OF THE SMALL SUBUNIT 6 (RPS6) has been known for 40 years, but the biochemical significance of this event remains unclear to this day. Here, we confirm using a clock-deficient strai  ...[more]

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