Research, Research Articles
Cell wall dynamics modulate acetic acid-induced apoptotic cell death of Saccharomyces cerevisiae
António Rego#, Ana Marta Duarte#, Flávio Azevedo#, Maria João Sousa, Manuela Côrte-Real and Susana R. Chaves
This work characterizes the involvement of MAPK signaling pathways in cell death induced by acetic acid in Saccharomyces cerevisiae.
Extracellular calcium triggers unique transcriptional programs and modulates staurosporine-induced cell death in Neurospora crassa
A. Pedro Gonçalves1,2, João Monteiro2, Chiara Lucchi2, David J. Kowbel3, J. Miguel Cordeiro1,4, Paulo Correia-de-Sá1,4, Daniel J. Rigden5, N. Louise Glass3, Arnaldo Videira1,2
The results presented here reveal that in Neurospora crassa, extracellular Ca2+ modulates cell death and the transcriptional alterations induced by staurosporine, and lead to the identification of two novel putative Ca2+-binding proteins, encoded by the NCU08524 and NCU06607 genes.
Multiple metabolic requirements for size homeostasis and initiation of division in Saccharomyces cerevisiae
Shivatheja Soma, Kailu Yang, Maria I. Morales and Michael Polymenis
This article reveals an unexpected diversity in the G1 cell cycle phenotypes of metabolic and biosynthetic Saccharomyces cerevisiae mutants, suggesting that growth requirements for cell division are multiple, distinct and imposed throughout the G1 phase of the cell cycle.
Exogenous addition of histidine reduces copper availability in the yeast Saccharomyces cerevisiae
Daisuke Watanabe, Rie Kikushima, Miho Aitoku, Akira Nishimura, Iwao Ohtsu, Ryo Nasuno, and Hiroshi Takagi
The herein presented results indicate that in Saccharomyces cerevisiae, histidine cytotoxicity is associated with low copper availability inside cells, not with impaired copper uptake. Furthermore, it suggests that histidine cytotoxicity is involved in deficiency of mitochondrial copper.
Effect of paraquat-induced oxidative stress on gene expression and aging of the filamentous ascomycete Podospora anserina
Matthias Wiemer and Heinz D. Osiewacz
In this article, paraquat is used to experimentally induce strong cellular oxidative stress in Podospora anserina wild-type cultures of different age, finding that this treatment has profound effects on gene expression, growth and lifespan.
Heat shock protein 90 and calcineurin pathway inhibitors enhance the efficacy of triazoles against Scedosporium prolificans via induction of apoptosis
Fazal Shirazi and Dimitrios P. Kontoyiannis
This article reports for the first time that posaconazole (PCZ) or itraconazolein (ICZ) in combination with the calcineurin inhibitor tacrolimus or the Hsp90 inhibitor 17-demethoxy-17-(2-propenylamino) geldanamycin renders S. prolificans exquisitely sensitive to PCZ or ICZ via apoptosis.
At neutral pH the chronological lifespan of Hansenula polymorpha increases upon enhancing the carbon source concentrations
Adam Kawałek and Ida J. van der Klei
The data presented in this work indicate that in H. polymorpha at neutral pH the chronological lifespan invariably extends upon increasing the carbon source concentration.
Salt stress causes cell wall damage in yeast cells lacking mitochondrial DNA
Qiuqiang Gao1, Liang-Chun Liou2, Qun Ren2, Xiaoming Bao3 and Zhaojie Zhang2
In this work, the authors report that salt stress causes cell wall damage in yeast cells lacking mitochondrial DNA (ρ0) and that this damage is related to elevated levels of SCW11 and salt stress-induced reactive oxygen species.
Protein oxidation in the intermembrane space of mitochondria is substrate-specific rather than general
Valentina Peleh1, Jan Riemer2, Andrew Dancis3 and Johannes M. Herrmann1
In this work, the authors suggest that in Saccharomyces cerevisiae, the Mia40-dependent oxidation of proteins in the intermembrane space only takes place in specific proteins and presumably relies on the presence of Mia40-binding sites.
Investigation of the acetic acid stress response in Saccharomyces cerevisiae with mutated H3 residues
August 18, 2023
Yeast cells respond to acetic acid in diverse ways. Here, we have elucidated the deleterious effects of acetic acid on different histone mutants
The coenzyme B12 precursor 5,6-dimethylbenzimidazole is a flavin antagonist in Salmonella
August 17, 2023
Here we investigated why 5,6-dimethylbenzimidazole (DMB) inhibits in S. Typhimurium. Briefly, we determined that the structural similarities of the substituted benzene ring of DMB with the isoalloxazine moiety of flavins is responsible for the deleterious effects of this CoB12 precursor.
Yeast gene KTI13 (alias DPH8) operates in the initiation step of diphthamide synthesis on elongation factor 2
August 8, 2023
We show here that apart from its effector role for Elongator-dependent tRNA modification in yeast, Kti13 alias Dph8 also operates in step one of the diphthamide modification pathway.
GFP fusions of Sec-routed extracellular proteins in Staphylococcus aureus reveal surface-associated coagulase in biofilms
June 28, 2023
We show that msfGFP can be used to generate extracellular fluorescent fusion proteins in S. aureus, applicable for proteins that are secreted through the Sec pathway. When fused to coagulase, msfGFP did not hinder the biological function, and the fusion protein localised to the fibrin pseudocapsule surrounding clusters of S. aureus cells.
Atg1, a key regulator of autophagy, functions to promote MAPK activation and cell death upon calcium overload in fission yeast
May 10, 2023
Here, we provide evidence that the fission yeast Atg1 regulates cell death responses upon intracellular calcium load in addition to its role in promoting Pmk1 MAPK.
TL-532, a novel specific Toll-like receptor 3 agonist rationally designed for targeting cancers: discovery process and biological characterization
April 19, 2023
In the present study, we identified a new family of TLR3 agonists that activates myeloid cells, triggers the secretion of pro-inflammatory cytokines in both myeloid and cancer cells, and induces apoptosis specifically in cancer cells.
Acetate modulates the inhibitory effect of Lactobacillus gasseri against the pathogenic yeasts Candida albicans and Candida glabrata
March 21, 2023
The results herein described advance the design of new anti-Candida therapies based on probiotics, in particular, those based on vaginal lactobacilli species, helping to reduce the significant burden that infections caused by Candida have today in human health.
D-Serine reduces the expression of the cytopathic genotoxin colibactin
March 8, 2023
Sensing and responding to environmental cues and signalling molecules is crucial for bacterial survival. In this study we have identified a D-amino acid that has a strong regulatory effect on the pks genomic island which encodes for biosynthesis genes for the genotoxic compound colibactin.