Scientific article
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English

Inositol pyrophosphate catabolism by three families of phosphatases regulates plant growth and development

Published inPLOS genetics, vol. 20, no. 11, e1011468
Publication date2024-11
First online date2024-11-12
Abstract

Inositol pyrophosphates (PP-InsPs) are nutrient messengers whose cellular levels are precisely regulated. Diphosphoinositol pentakisphosphate kinases (PPIP5Ks) generate the active signaling molecule 1,5-InsP8. PPIP5Ks harbor phosphatase domains that hydrolyze PP-InsPs. Plant and Fungi Atypical Dual Specificity Phosphatases (PFA-DSPs) and NUDIX phosphatases (NUDTs) are also involved in PP-InsP degradation. Here, we analyze the relative contributions of the three different phosphatase families to plant PP-InsP catabolism. We report the biochemical characterization of inositol pyrophosphate phosphatases from Arabidopsis and Marchantia polymorpha. Overexpression of different PFA-DSP and NUDT enzymes affects PP-InsP levels and leads to stunted growth phenotypes in Arabidopsis. nudt17/18/21 knock-out mutants have altered PP-InsP pools and gene expression patterns, but no apparent growth defects. In contrast, Marchantia polymorpha Mppfa-dsp1ge, Mpnudt1ge and Mpvip1ge mutants display severe growth and developmental phenotypes and associated changes in cellular PP-InsP levels. Analysis of Mppfa-dsp1geand Mpvip1ge mutants supports a role for PP-InsPs in Marchantia phosphate signaling, and additional functions in nitrate homeostasis and cell wall biogenesis. Simultaneous elimination of two phosphatase activities enhanced the observed growth phenotypes. Taken together, PPIP5K, PFA-DSP and NUDT inositol pyrophosphate phosphatases regulate growth and development by collectively shaping plant PP-InsP pools.

Keywords
  • Arabidopsis / genetics
  • Arabidopsis / growth & development
  • Arabidopsis / metabolism
  • Inositol Phosphates / metabolism
  • Phosphoric Monoester Hydrolases / genetics
  • Phosphoric Monoester Hydrolases / metabolism
  • Plant Development / genetics
  • Gene Expression Regulation, Plant
  • Arabidopsis Proteins / genetics
  • Arabidopsis Proteins / metabolism
  • Phosphotransferases (Phosphate Group Acceptor) / genetics
  • Phosphotransferases (Phosphate Group Acceptor) / metabolism
  • Pyrophosphatases / genetics
  • Pyrophosphatases / metabolism
Research groups
Funding
Citation (ISO format)
LAURENT, Florian et al. Inositol pyrophosphate catabolism by three families of phosphatases regulates plant growth and development. In: PLOS genetics, 2024, vol. 20, n° 11, p. e1011468. doi: 10.1371/journal.pgen.1011468
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Identifiers
Journal ISSN1553-7390
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