Arabidopsis REI-LIKE proteins activate ribosome biogenesis during cold acclimation.

Arabidopsis REI-LIKE proteins activate ribosome biogenesis during cold acclimation.
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DOI:
10.1038/s41598-021-81610-z
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发表时间:
2021-01-28
期刊:
影响因子:
4.6
通讯作者:
Kopka J
Kopka J
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cheong BE;Beine-Golovchuk O;Gorka M;Ho WWH;Martinez-Seidel F;Firmino AAP;Skirycz A;Roessner U;Kopka J

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拟南芥雷尔蛋白是一种核糖体60 S-生物合成因子。在转变到10 °C后,雷尔突变体耗尽并缓慢补充根组织的非翻译真核核糖体复合物,同时控制非翻译40 S-和60 S-亚基的平衡。雷尔突变的反应是在稳态温度下非翻译亚基的超积累;冷转移后,KCl敏感的80 S亚组分仍然耗尽。我们推断,拟南芥可能缓冲波动的翻译之前,预先存在的非翻译核糖体从头合成满足温度诱导的需求。reil 1 reil 2双突变体积累43 S-前起始和前60 S-成熟复合物,并改变非翻译复合物中核糖体蛋白质的paraminase组成。除了少数例外,例如RPL 3B和RPL 24 C,这些变化不受转录控制。我们的研究表明,需要从头合成的真核生物核糖体的长期冷驯化,反馈控制NUC 2和eIF 3C 2的转录和链接的新蛋白,AT 1G 03250,AT 5G 60530,植物核糖体的生物合成。我们建议,拟南芥需要专门的核糖体的生物合成冷驯化。
Arabidopsis REIL proteins are cytosolic ribosomal 60S-biogenesis factors. After shift to 10 °C, reil mutants deplete and slowly replenish non-translating eukaryotic ribosome complexes of root tissue, while controlling the balance of non-translating 40S- and 60S-subunits. Reil mutations respond by hyper-accumulation of non-translating subunits at steady-state temperature; after cold-shift, a KCl-sensitive 80S sub-fraction remains depleted. We infer that Arabidopsis may buffer fluctuating translation by pre-existing non-translating ribosomes before de novo synthesis meets temperature-induced demands. Reil1 reil2 double mutants accumulate 43S-preinitiation and pre-60S-maturation complexes and alter paralog composition of ribosomal proteins in non-translating complexes. With few exceptions, e.g. RPL3B and RPL24C, these changes are not under transcriptional control. Our study suggests requirement of de novo synthesis of eukaryotic ribosomes for long-term cold acclimation, feedback control of NUC2 and eIF3C2 transcription and links new proteins, AT1G03250, AT5G60530, to plant ribosome biogenesis. We propose that Arabidopsis requires biosynthesis of specialized ribosomes for cold acclimation.
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