NEM1 acts as a suppressor of apoptotic phenotypes in LSM4 yeast mutants

FEMS Yeast Research
Vanessa PalermoCristina Mazzoni

Abstract

Saccharomyces cerevisiae mutants in the essential gene LSM4, involved in messenger RNA decapping, and expressing a truncated form of the LSM4 gene of the yeast Kluyveromyces lactis (Kllsm4Δ1), show premature aging accompanied by the presence of typical markers of apoptosis and high sensitivity to oxidative stressing agents. We isolated multicopy extragenic suppressors of these defects, transforming the Kllsm4Δ1 mutant with a yeast DNA library and selecting clones showing resistance to acetic acid. Here we present one of these clones, carrying a DNA fragment containing the NEM1 gene (Nuclear Envelope Morphology protein 1), which encodes the catalytic subunit of the Nem1p-Spo7p phosphatase holoenzyme. Nem1p regulates nuclear growth by controlling phospholipid biosynthesis and it is required for normal nuclear envelope morphology and sporulation. The data presented here correlate the mRNA metabolism with the biosynthesis of phospholipids and with the functionality of the endoplasmic reticulum.

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Citations

Apr 7, 2016·Cellular and Molecular Life Sciences : CMLS·Claudio Falcone, Cristina Mazzoni
Jul 10, 2018·FEMS Yeast Research·Claudio Falcone, Cristina Mazzoni
Aug 8, 2021·Microorganisms·Valentina VaporeCristina Mazzoni
Nov 15, 2018·ACS Chemical Biology·Raphael I BenhamouMicha Fridman

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis