A shotgun phosphoproteomics analysis of embryos in germinated maize seeds.

Planta
Tian-Cong LuBai-Chen Wang

Abstract

To better understand the role that reversible protein phosphorylation plays in seed germination, we initiated a phosphoproteomic investigation of embryos of germinated maize seeds. A total of 776 proteins including 39 kinases, 16 phosphatases, and 33 phosphoproteins containing 36 precise in vivo phosphorylation sites were identified. All the phosphorylation sites identified, with the exception of the phosphorylation site on HSP22, have not been reported previously (Lund et al. in J Biol Chem, 276, 29924-29929, 2001). Assayed with QRT-PCR, the transcripts of ten kinase genes were found to be dramatically up-regulated during seed germination and those of four phosphatase genes were up-regulated after germination, which indicated that reversible protein phosphorylation occurred and complex regulating networks were activated during this period. At least one-third of these phosphoproteins are key components involved in biological processes which relate to seed germination, such as DNA repair, gene transcription, RNA splicing and protein translation, suggesting that protein phosphorylation plays an important role in seed germination. As far as we know, this is the first phosphoproteomic study on a monocot and it will lay a solid foun...Continue Reading

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Citations

Nov 6, 2010·Planta·Ying-Dong BiBai-Chen Wang
May 6, 2014·Plant & Cell Physiology·Chao HanPingfang Yang
Dec 6, 2011·Annual Review of Plant Biology·Loïc RajjouDominique Job
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May 29, 2021·Biological Reviews of the Cambridge Philosophical Society·Mohammad ArefianT S Keshava Prasad
Jun 3, 2021·International Journal of Molecular Sciences·Piengtawan TappibanJinsong Bao

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