Research, Research Reports
Transcriptomic response to different heme sources in Trypanosoma cruzi epimastigotes
Evelyn Tevere1,a, María G. Mediavilla1,a, Cecilia B. Di Capua1, Marcelo L. Merli1, Carlos Robello2,3, Luisa Berná2,4 and Julia A. Cricco
This study uncovers how the Chagas disease parasite adapts to changes in heme, an essential molecule for its survival, providing transcriptional clues to heme metabolism and identifying a previously unreported heme-binding protein in T. cruzi.
Sir2 regulates selective autophagy in stationary-phase yeast cells
Ji-In Ryua, Juhye Junga, and Jeong-Yoon Kim
This study establishes Sir2 as a previously unrecognized regulator of selective autophagy during the stationary phase and highlight how cells dynamically control organelle degradation.
Luminal acetylation of microtubules is not essential for Plasmodium berghei and Toxoplasma gondii survival
Thrishla Kumar1,a, Katharina Röver2,a, Johannes F. Stortz3,a, Annika M. Binder2,a, Benjamin Spreng2, Madlen Konert2, Markus Meissner1, Friedrich Frischknecht2,4 and Elena Jimenez-Ruiz1,*
Acetylation of α-tubulin at lysine 40 is not essential for cytoskeletal stability in Plasmodium berghei or Toxoplasma gondii, suggesting redundancy and plasticity in microtubule regulation in these parasites.
The dual-site agonist for human M2 muscarinic receptors Iper-8-naphtalimide induces mitochondrial dysfunction in Saccharomyces cerevisiae
Angela Cirigliano1,a, Antonia Amelina2,a, Elena Passarini2, Alessandra Ricelli1, Nicole Balasco1, Mattia Mori3, Bruno Botta4, Maria Egle De Stefano2,5, Claudio Papotto6, Claudia Guerriero2, Ada Maria Tata2,5 and Teresa Rinaldi2,*
S. cerevisiae is a model to study human GPCRs. N-8-Iper, active against glioblastoma via M2 receptor, causes mitochondrial damage in yeast by binding Ste2, highlighting evolutionary conservation of GPCRs.
The core genetic drivers of chronological aging in yeast are universal regulators of longevity
Erika Cruz-Bonilla1, Sergio E. Campos2, Soledad Funes3, Cei Abreu-Goodger4 and Alexander DeLuna1,2,*
This study provides an integrated view of the core genetic landscape underlying aging in yeast, highlighting the value of the chronological lifespan paradigm for investigating conserved mechanisms of aging.
Organelle activity organized by the endoplasmic reticulum-mitochondria encounter structure –ERMES– is essential for Podospora anserina development
Melisa Álvarez-Sánchez1, Matías Ramírez-Noguez1, Beatriz Aguirre-López1 and Leonardo Peraza-Reyes1
This study shows that the regulation of the activity of multiple organelles by the ERMES (Endoplasmic Reticulum-Mitochondria Encounter Structure) tethering complex is essential for fungal growth and sexual development.
Role of the putative sit1 gene in normal germination of spores and virulence of the Mucor lusitanicus
Bernadett Vágó1,2, Kitti Bauer1,2, Naomi Varghese1,2, Sándor Kiss-Vetráb1,2, Sándor Kocsubé1,2, Mónika Varga1,2, András Szekeres1,2, Csaba Vágvölgyi1,2, Tamás Papp1,2,3,# and Gábor Nagy1,2,3,#
Mucormycosis is a life-threatening infection caused by certain members of the fungal order Mucorales, with increased incidence in recent years. Individuals with untreated diabetes mellitus, and patients treated with deferoxamine are particularly susceptible to this infection.
Tumor microenvironment signatures enhances lung adenocarcinoma prognosis prediction: Implication of intratumoral microbiota
Fei Zhao1,#, Lei Wang2,3,4,#, Dongjie Du5, Heaven Zhao6,7, Geng Tian6,7, Yufeng Li2,3,8, Yankun Liu2,8,9, Zhiwu Wang2,3,10, Dasheng Liu11, Jingwu Li2,3,12, Lei Ji6,7 and Hong Zhao1
The interaction between intratumoral microbiome and the tumor microenvironment (TME) has furthered our understanding of tumor ecology. Yet, the implications of their interaction for lung cancer management remain unclear.
Persistence phenotype of adherent-invasive Escherichia coli in response to ciprofloxacin, revealing high-persistence strains
Valeria Pérez-Villalobos1, Roberto Vidal2, Marcela A. Hermoso3,4 and Paula Bustamante1
We investigated the roles of the resident antibiotic resistance plasmid, the stress response protein HtrA, and macrophage-induced persister formation. Our results revealed broad variability in persister cell formation among AIEC strains.
A novel BR-SMAD is required for larval development in barber’s pole worm Haemonchus contortus
December 23, 2020
The herein presented results show a BMP-like receptor-regulated SMAD in Haemonchus contortus that is required for larval differentiation and underscore an adaptive functional repurposing of BMP-signaling in parasitic worms.
Nutrient sensing and cAMP signaling in yeast: G-protein coupled receptor versus transceptor activation of PKA
October 12, 2020
The herein presented work supports a model, in which nutrient transceptors are evolutionary ancestors of GPCRs, employing a more primitive direct signaling mechanism compared to the indirect cAMP second-messenger signaling mechanism used by GPCRs for activation of PKA.
Novobiocin inhibits membrane synthesis and vacuole formation of Enterococcus faecalis protoplasts
August 10, 2020
In this study Tsuchikado et al. show that DNA replication is crucial for plasma membrane biosynthesis and vacuole formation in Enterococcus faecalis protoplasts. Novobiocin inhibits DNA replication, blocking cell enlargement and vacuole formation. Extended treatment prevents re-enlargement after removal.
Variants of the human RAD52 gene confer defects in ionizing radiation resistance and homologous recombination repair in budding yeast
July 20, 2020
RAD52 is a key protein in DNA repair and suppresses DNA damage in yeast; however, certain variants affecting BRCA2 mutations fail to correct HRR defects. This suggests that HsRAD52 aids multiple DNA repair mechanisms and could be targeted for use in treating BRCA2-deficient cancers.
Systematic analysis of nuclear gene function in respiratory growth and expression of the mitochondrial genome in S. cerevisiae
June 30, 2020
Using yeast Saccharomyces cerevisiae, the authors identified 254 nuclear genes essential for respiratory growth and 12 required for viability without mtDNA. They also found 176 genes involved in mitochondrial protein synthesis and mtDNA maintenance, offering a comprehensive view of the processes supporting oxidative phosphorylation.
Histone H3E73Q and H4E53A mutations cause recombinogenic DNA damage
April 24, 2020
This study reveals that conserved residues H3E73 and H4E53 in histones H3 and H4 play a crucial role in maintaining genome stability. Mutations at these sites increase recombinogenic DNA damage, likely due to replication-associated issues rather than transcriptional activity, highlighting their importance in DNA damage prevention and repair.
Sulforaphane alters the acidification of the yeast vacuole
March 20, 2020
This study identifies vacuolar pH regulation as a key factor in sulforaphane (SFN) sensitivity, showing that SFN-induced cell death in yeast - and potentially in human cancer cells - is linked to its ability to raise vacuolar or lysosomal pH.
Broad-spectrum antifungal activities and mechanism of drimane sesquiterpenoids
March 12, 2020
This study identifies (-)-drimenol as a potent broad-spectrum antifungal agent effective against multiple pathogenic fungi, including drug-resistant strains, and reveals its mechanism of action involves disruption of fungal membranes and targeting Crk1-related pathways, with potential for structural optimization to enhance efficacy.
Stable and destabilized GFP reporters to monitor calcineurin activity in Saccharomyces cerevisiae
February 5, 2020
This study introduces GFP-based transcriptional reporters driven by a calcineurin-dependent response element, enabling real-time monitoring of calcineurin activity in live yeast cells for studying stress responses, aging, and antifungal drug screening.
The euchromatic histone mark H3K36me3 preserves heterochromatin through sequestration of an acetyltransferase complex in fission yeast
January 3, 2020
This study reveals that the loss of heterochromatin silencing in Set2-deficient cells is due to unrestrained Mst2C activity, highlighting the need for spatially restricted chromatin-modifying enzymes to maintain distinct chromatin states.