Proteins that interact with rice pumilio 1

Sugiharti, Yuyun; Azizi, Aqil; Su’udi, Mukhamad

doi:10.2306/scienceasia1513-1874.2013.39.615

Cited by 1 publication

(1 citation statement)

References 27 publications

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“…5b). Notably, the rice PUMILIO1 protein was recently found to interact with dormancy associated proteins which further support our model (Sugiharti et al 2013). Furthermore, APUM24 was recently shown to be required for normal cell division during early embryogenesis by regulating the proper flow of auxin in plant embryos (Shanmugam et al 2017).…”

Section: Discussionsupporting

confidence: 89%

Functional and molecular characterization of the conserved Arabidopsis PUMILIO protein, APUM9

2019

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Key message Here we demonstrate that the APUM9 RNA-binding protein and its co-factors play a role in mRNA destabilization and how this activity might regulate early plant development. Abstract APUM9 is a conserved PUF RNA-binding protein (RBP) under complex transcriptional control mediated by a transposable element (TE) that restricts its expression in Arabidopsis. Currently, little is known about the functional and mechanistic details of the plant PUF regulatory system and the biological relevance of the TE-mediated repression of APUM9 in plant development and stress responses. By combining a range of transient assays, we show here, that APUM9 binding to target transcripts can trigger their rapid decay via its conserved C-terminal RNA-binding domain. APUM9 directly interacts with DCP2, the catalytic subunit of the decapping complex and DCP2 overexpression induces rapid decay of APUM9 targeted mRNAs. We show that APUM9 negatively regulates the expression of ABA signaling genes during seed imbibition, and thereby might contribute to the switch from dormant stage to seed germination. By contrast, strong TE-mediated repression of APUM9 is important for normal plant growth in the later developmental stages. Finally, APUM9 overexpression plants show slightly enhanced heat tolerance suggesting that TE-mediated control of APUM9, might have a role not only in embryonic development, but also in plant adaptation to heat stress conditions. Electronic supplementary material The online version of this article (10.1007/s11103-019-00853-7) contains supplementary material, which is available to authorized users.

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Section: Discussionsupporting

confidence: 89%