Microbial Cell最新文献

It takes four to tango: the cooperative adventure of scientific publishing.

IF 4.1 3区生物学

Microbial Cell Pub Date : 2025-02-21 eCollection Date: 2025-01-01 DOI: 10.15698/mic2025.02.843

Didac Carmona-Gutierrez, Katharina Kainz, Frank Madeo

引用次数: 0

Paving the way for new antimicrobial peptides through molecular de-extinction.

IF 4.1 3区生物学

Microbial Cell Pub Date : 2025-02-20 eCollection Date: 2025-01-01 DOI: 10.15698/mic2025.02.841

Karen O Osiro, Abel Gil-Ley, Fabiano C Fernandes, Kamila B S de Oliveira, Cesar de la Fuente-Nunez, Octavio L Franco

引用次数: 0

Integrative Omics reveals changes in the cellular landscape of peroxisome-deficient pex3 yeast cells.

IF 4.1 3区生物学

Microbial Cell Pub Date : 2025-02-20 eCollection Date: 2025-01-01 DOI: 10.15698/mic2025.02.842

Tjasa Kosir, Hirak Das, Marc Pilegaard Pedersen, Ann-Kathrin Richard, Marco Anteghini, Vitor Martins Dos Santos, Silke Oeljeklaus, Ida J van der Klei, Bettina Warscheid

{"title":"Integrative Omics reveals changes in the cellular landscape of peroxisome-deficient pex3 yeast cells.","authors":"Tjasa Kosir, Hirak Das, Marc Pilegaard Pedersen, Ann-Kathrin Richard, Marco Anteghini, Vitor Martins Dos Santos, Silke Oeljeklaus, Ida J van der Klei, Bettina Warscheid","doi":"10.15698/mic2025.02.842","DOIUrl":"10.15698/mic2025.02.842","url":null,"abstract":"Peroxisomes are organelles that are crucial for cellular metabolism, but they also play important roles in non-metabolic processes such as signalling, stress response or antiviral defense. To uncover the consequences of peroxisome deficiency, we compared Saccharomyces cerevisiae wild-type with pex3 cells, which lack peroxisomes, employing quantitative proteomics and transcriptomics technologies. Cells were grown on acetate, a carbon source that requires peroxisomal enzymes of the glyoxylate cycle to generate energy and essential carbohydrates, and that does not repress the expression of peroxisomal genes. Our integrative omics analysis reveals that the absence of peroxisomes induces distinct responses at the level of the transcriptome and proteome. Transcripts of genes and corresponding proteins that are associated with peroxisomal β-oxidation were mostly increased in pex3 cells. In contrast, levels of peroxins were regulated at protein but not at transcript level. Membrane-bound peroxins were reduced, whereas the soluble receptors Pex5 and Pex7 were increased in abundance in pex3 cells. Interestingly, we found several non-peroxisomal transcript and proteins regulated in pex3 cells including mitochondrial proteins involved in respiration or import processes, which led to the identification of the mitochondrial pyruvate carrier Mpc1/3 as so far unnoticed transporter present in the peroxisomal membrane. Our results reveal the impact of the absence of peroxisomes in pex3 yeast cells and represent a rich resource of genes/proteins for follow-up studies to obtain a deeper understanding of peroxisome biology in a cellular context.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"12 ","pages":"9-33"},"PeriodicalIF":4.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11862644/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-assisted preparation of yeast cells for ultrastructural analysis by electron microscopy. 微波辅助制备酵母细胞，以便用电子显微镜进行超微结构分析。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-11-18 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.11.840

Moritz Mayer, Christina Schug, Stefan Geimer, Till Klecker, Benedikt Westermann

引用次数: 0

Efflux pumps: gatekeepers of antibiotic resistance in Staphylococcus aureus biofilms. 外排泵：金黄色葡萄球菌生物膜中抗生素耐药性的看门人。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-11-11 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.11.839

Shweta Sinha, Shifu Aggarwal, Durg Vijai Singh

{"title":"Efflux pumps: gatekeepers of antibiotic resistance in Staphylococcus aureus biofilms.","authors":"Shweta Sinha, Shifu Aggarwal, Durg Vijai Singh","doi":"10.15698/mic2024.11.839","DOIUrl":"10.15698/mic2024.11.839","url":null,"abstract":"Staphylococcus aureus, a versatile human pathogen, poses a significant challenge in healthcare settings due to its ability to develop antibiotic resistance and form robust biofilms. Understanding the intricate mechanisms underlying the antibiotic resistance is crucial for effective infection treatment and control. This comprehensive review delves into the multifaceted roles of efflux pumps in S. aureus, with a focus on their contribution to antibiotic resistance and biofilm formation. Efflux pumps, integral components of the bacterial cell membrane, are responsible for expelling a wide range of toxic substances, including antibiotics, from bacterial cells. By actively extruding antibiotics, these pumps reduce intracellular drug concentrations, rendering antibiotics less effective. Moreover, efflux pumps have emerged as significant contributors to both antibiotic resistance and biofilm formation in S. aureus. Biofilms, structured communities of bacterial cells embedded in a protective matrix, enable S. aureus to adhere to surfaces, evade host immune responses, and resist antibiotic therapy. Efflux pumps play a pivotal role in the development and maintenance of S. aureus biofilms. However, the interplay between efflux pumps, antibiotic resistance and biofilm formation remains unexplored in S. aureus. This review aims to elucidate the complex relationship between efflux pumps, antibiotic resistance and biofilm formation in S. aureus with the aim to aid in the development of potential therapeutic targets for combating S. aureus infections, especially those associated with biofilms. The insights provided herein may contribute to the advancement of novel strategies to overcome antibiotic resistance and disrupt biofilm formation in this clinically significant pathogen.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"11 ","pages":"368-377"},"PeriodicalIF":4.1,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11576857/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142682233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A complex remodeling of cellular homeostasis distinguishes RSV/SARS-CoV-2 co-infected A549-hACE2 expressing cell lines. RSV/SARS-CoV-2共同感染的A549-hACE2表达细胞系的细胞平衡发生了复杂的重塑。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-10-08 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.10.838

Claudia Vanetti, Irma Saulle, Valentina Artusa, Claudia Moscheni, Gioia Cappelletti, Silvia Zecchini, Sergio Strizzi, Micaela Garziano, Claudio Fenizia, Antonella Tosoni, Martina Broggiato, Pasquale Ogno, Manuela Nebuloni, Mario Clerici, Daria Trabattoni, Fiona Limanaqi, Mara Biasin

{"title":"A complex remodeling of cellular homeostasis distinguishes RSV/SARS-CoV-2 co-infected A549-hACE2 expressing cell lines.","authors":"Claudia Vanetti, Irma Saulle, Valentina Artusa, Claudia Moscheni, Gioia Cappelletti, Silvia Zecchini, Sergio Strizzi, Micaela Garziano, Claudio Fenizia, Antonella Tosoni, Martina Broggiato, Pasquale Ogno, Manuela Nebuloni, Mario Clerici, Daria Trabattoni, Fiona Limanaqi, Mara Biasin","doi":"10.15698/mic2024.10.838","DOIUrl":"https://doi.org/10.15698/mic2024.10.838","url":null,"abstract":"Concurrent infections with two or more pathogens with analogous tropism, such as RSV and SARS-CoV-2, may antagonize or facilitate each other, modulating disease outcome. Clinically, discrepancies in the severity of symptoms have been reported in children with RSV/SARS-CoV-2 co-infection. Herein, we propose an in vitro co-infection model to assess how RSV/SARS-CoV-2 co-infection alters cellular homeostasis. To this end, A549-hACE2 expressing cells were either infected with RSV or SARS-CoV-2 alone or co-infected with both viruses. Viral replication was assessed at 72 hours post infection by droplet digital PCR, immunofluorescence, and transmission electron microscopy. Anti-viral/receptor/autophagy gene expression was evaluated by RT-qPCR and confirmed by secretome analyses and intracellular protein production. RSV/SARS-CoV-2 co-infection in A549-hACE2 cells was characterized by: 1) an increase in the replication rate of RSV compared to single infection; 2) an increase in one of the RSV host receptors, ICAM1; 3) an upregulation in the expression/secretion of pro-inflammatory genes; 4) a rise in the number and length of cellular conduits; and 5) augmented autophagosomes formation and/or alteration of the autophagy pathway. These findings suggest that RSV/SARS-CoV-2 co-infection model displays a unique and specific viral and molecular fingerprint and shed light on the viral dynamics during viral infection pathogenesis. This in vitro co-infection model may represent a potential attractive cost-effective approach to mimic both viral dynamics and host cellular responses, providing in future readily measurable targets predictive of co-infection progression.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"11 ","pages":"353-367"},"PeriodicalIF":4.1,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11486504/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142469522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RidA proteins contribute to fitness of S. enterica and E. coli by reducing 2AA stress and moderating flux to isoleucine biosynthesis. RidA 蛋白通过降低 2AA 压力和调节异亮氨酸生物合成的通量，对肠杆菌属和大肠杆菌的适应性做出了贡献。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-10-04 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.10.837

Ronnie L Fulton, Bryce R Sawyer, Diana M Downs

{"title":"RidA proteins contribute to fitness of S. enterica and E. coli by reducing 2AA stress and moderating flux to isoleucine biosynthesis.","authors":"Ronnie L Fulton, Bryce R Sawyer, Diana M Downs","doi":"10.15698/mic2024.10.837","DOIUrl":"10.15698/mic2024.10.837","url":null,"abstract":"Defining the physiological role of a gene product relies on interpreting phenotypes caused by the lack, or alteration, of the respective gene product. Mutations in critical genes often lead to easily recognized phenotypes that can include changes in cellular growth, metabolism, structure etc. However, mutations in many important genes may fail to generate an obvious defect unless additional perturbations are caused by medium or genetic background. The latter scenario is exemplified by RidA proteins. In vitro RidA proteins deaminate numerous imine/enamines, including those generated by serine/threonine dehydratase IlvA (EC:4.3.1.19) from serine or threonine - 2-aminoacrylate (2AA) and 2-aminocrotonate (2AC), respectively. Despite this demonstrable biochemical activity, a lack of RidA has little to no effect on growth of E. coli or S. enterica without the application of additional metabolic perturbation. A cellular role of RidA is to prevent accumulation of 2AA which, if allowed to persist, can irreversibly damage pyridoxal 5'-phosphate (PLP)-dependent enzymes, causing global metabolic stress. Because the phenotypes caused by a lack of RidA are dependent on the unique structure of each metabolic network, the link between RidA function and 2AA stress is difficult to demonstrate in some organisms. The current study used coculture experiments to exacerbate differences in growth caused by the lack of RidA in S. enterica and E. coli. Results described here solidify the established role of RidA in removing 2AA, while also presenting evidence for a role of RidA in enhancing flux towards isoleucine biosynthesis in E. coli. Overall, these data emphasize that metabolic networks can generate distinct responses to perturbation, even when the individual components are conserved.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"11 ","pages":"339-352"},"PeriodicalIF":4.1,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11491847/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142469523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fecal gelatinase does not predict mortality in patients with alcohol-associated hepatitis. 粪便明胶酶不能预测酒精相关性肝炎患者的死亡率。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-08-26 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.08.836

Yongqiang Yang, Phillipp Hartmann, Bernd Schnabl

{"title":"Fecal gelatinase does not predict mortality in patients with alcohol-associated hepatitis.","authors":"Yongqiang Yang, Phillipp Hartmann, Bernd Schnabl","doi":"10.15698/mic2024.08.836","DOIUrl":"10.15698/mic2024.08.836","url":null,"abstract":"Alcohol-associated liver disease is highly prevalent worldwide, with alcohol-associated hepatitis as a severe form characterized by substantial morbidity, mortality, and economic burden. Gut bacterial dysbiosis has been linked to progression of alcohol-associated hepatitis. Fecal cytolysin secreted by the pathobiont Enterococcus faecalis (E. faecalis) is associated with increased mortality in patients with alcohol-associated hepatitis. Although gelatinase is considered a virulence factor in E. faecalis, its prevalence and impact on alcohol-associated hepatitis patient outcomes remains unclear. In this study, 20 out of 65 (30.8%) patients with alcohol-associated hepatitis tested positive for gelatinase in their stool. There were no significant differences in 30-day and 90-day mortality between gelatinase-positive and gelatinase-negative patients (p=0.97 and p=0.48, respectively). Fecal gelatinase had a low discriminative ability for 30-day mortality (area under the curve [AUC] 0.50 vs fibrosis-4 Index (FIB-4) 0.75) and 90-day mortality compared with other established liver disease markers (AUC 0.57 vs FIB-4 0.79 or 'age, serum bilirubin, INR, and serum creatinine' (ABIC) score 0.78). Furthermore, fecal gelatinase was not an important feature for 30-day or 90-day mortality per random forest analysis. Finally, gelatinase-positive patients with alcohol-associated hepatitis did not exhibit more severe liver disease compared with gelatinase-negative patients. In conclusion, fecal gelatinase does not predict mortality or disease severity in patients with alcohol-associated hepatitis from our cohort.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"11 ","pages":"328-338"},"PeriodicalIF":4.1,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11350238/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142109224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patterns of protein synthesis in the budding yeast cell cycle: variable or constant? 萌发酵母细胞周期中的蛋白质合成模式：可变还是恒定？

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-08-20 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.08.835

Eun-Gyu No, Heidi M Blank, Michael Polymenis

引用次数: 0

Direct detection of stringent alarmones (pp)pGpp using malachite green. 利用孔雀石绿直接检测严格报警酮 (pp)ppGpp。

IF 4.1 3区生物学

Microbial Cell Pub Date : 2024-08-05 eCollection Date: 2024-01-01 DOI: 10.15698/mic2024.08.834

Muriel Schicketanz, Magdalena Petrová, Dominik Rejman, Margherita Sosio, Stefano Donadio, Yong Everett Zhang

{"title":"Direct detection of stringent alarmones (pp)pGpp using malachite green.","authors":"Muriel Schicketanz, Magdalena Petrová, Dominik Rejman, Margherita Sosio, Stefano Donadio, Yong Everett Zhang","doi":"10.15698/mic2024.08.834","DOIUrl":"10.15698/mic2024.08.834","url":null,"abstract":"The alarmone (p)ppGpp serves as the signalling molecule for the bacterial universal stringent response and plays a crucial role in bacterial virulence, persistence, and stress adaptation. Consequently, there is a significant focus on developing new drugs that target and modulate the levels of (p)ppGpp as a potential strategy for controlling bacterial infections. However, despite the availability of various methods for detecting (p)ppGpp, a simple and straightforward detection method is needed. In this study, we demonstrated that malachite green, a well-established compound used for phosphate detection, can directly detect (p)ppGpp and its analogues esp., pGpp. By utilizing malachite green, we identified three new inhibitors of the hydrolase activity of SpoT, one of the two RelA-SpoT homolog (RSH) proteins responsible for making and hydrolyzing (p)ppGpp in Escherichia coli. These findings highlight the convenience and practicality of malachite green, which can be widely employed in high-throughput studies to investigate (pp)pGpp in vitro and discover novel regulators of RSH proteins.","PeriodicalId":18397,"journal":{"name":"Microbial Cell","volume":"11 ","pages":"312-320"},"PeriodicalIF":4.1,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11307201/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141906983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0