We report the study of Kluyveromyces lactis cells expressing a truncated form of KlLSM4, a gene ortholog to LSM4 of Saccharomyces cerevisiae which encodes an essential protein involved in both pre-mRNA splicing and mRNA decapping. We had previously demonstrated that the first 72 amino acids of the K. lactis Lsm4p (KlLsm4Deltap) can restore cell growth in both K. lactis and S. cerevisiae cells not expressing the endogenous protein. However, cells showed a remarkable loss of viability in stationary phase. Here we report that cells expressing KlLsm4Deltap presented clear apoptotic markers such as chromatin condensation, DNA fragmentation, accumulation of reactive oxygen species, and showed increased sensitivity to different drugs. RNA analysis revealed that pre-mRNA splicing was almost normal while mRNA degradation was significantly delayed, pointing to this as the possible step responsible for the observed phenotypes. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.

A Kluyveromyces lactis mutant in the essential gene KlLSM4 shows phenotypic markers of apoptosis / Mazzoni, Cristina; Mancini, Patrizia; F., Madeo; Palermo, Vanessa; Falcone, Claudio. - In: FEMS YEAST RESEARCH. - ISSN 1567-1356. - 4:1(2003), pp. 29-35. [10.1016/s1567-1356(03)00151-x]

A Kluyveromyces lactis mutant in the essential gene KlLSM4 shows phenotypic markers of apoptosis

MAZZONI, Cristina;MANCINI, Patrizia;PALERMO, Vanessa;FALCONE, Claudio
2003

Abstract

We report the study of Kluyveromyces lactis cells expressing a truncated form of KlLSM4, a gene ortholog to LSM4 of Saccharomyces cerevisiae which encodes an essential protein involved in both pre-mRNA splicing and mRNA decapping. We had previously demonstrated that the first 72 amino acids of the K. lactis Lsm4p (KlLsm4Deltap) can restore cell growth in both K. lactis and S. cerevisiae cells not expressing the endogenous protein. However, cells showed a remarkable loss of viability in stationary phase. Here we report that cells expressing KlLsm4Deltap presented clear apoptotic markers such as chromatin condensation, DNA fragmentation, accumulation of reactive oxygen species, and showed increased sensitivity to different drugs. RNA analysis revealed that pre-mRNA splicing was almost normal while mRNA degradation was significantly delayed, pointing to this as the possible step responsible for the observed phenotypes. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.
apoptosis; kluyveromyces; mrna turn-over; sm-like
01 Pubblicazione su rivista::01a Articolo in rivista
A Kluyveromyces lactis mutant in the essential gene KlLSM4 shows phenotypic markers of apoptosis / Mazzoni, Cristina; Mancini, Patrizia; F., Madeo; Palermo, Vanessa; Falcone, Claudio. - In: FEMS YEAST RESEARCH. - ISSN 1567-1356. - 4:1(2003), pp. 29-35. [10.1016/s1567-1356(03)00151-x]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/360260
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 8
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 20
social impact