The nine articles of this special issue of Biological Research address biochemical and genetic determinants of microbial response and tolerance to stressors in different biological models and environmental contexts. Individual articles provide a broad exploration of our current knowledge of response to stressors, with a special emphasis on metal metabolism and toxic compounds. This special issue highlights the field of microbial stress responses with novel contributions from colleagues and former trainees of the late Chilean Professor Claudio C. Vásquez Guzmán as a tribute to his legacy.
Microbial interactions with metals and stress response
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Citation: Biological Research 2022 55:25
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Characterization of metal(loid)s and antibiotic resistance in bacteria of human gut microbiota from chronic kidney disease subjects
Human Gut Microbiota (HGM) is composed of more than one thousand species, playing an important role in the health status of individuals. Dysbiosis (an HGM imbalance) is augmented as chronic kidney disease (CKD...
Citation: Biological Research 2022 55:23 -
Stress response and virulence factors in bacterial pathogens relevant for Chilean aquaculture: current status and outlook of our knowledge
The study of the stress responses in bacteria has given us a wealth of information regarding the mechanisms employed by these bacteria in aggressive or even non-optimal living conditions. This information has ...
Citation: Biological Research 2022 55:21 -
A novel gene from the acidophilic bacterium Leptospirillum sp. CF-1 and its role in oxidative stress and chromate tolerance
Acidophilic microorganisms like Leptospirillum sp. CF-1 thrive in environments with extremely low pH and high concentrations of dissolved heavy metals that can induce the generation of reactive oxygen species (RO...
Citation: Biological Research 2022 55:19 -
Tellurite and Selenite: how can these two oxyanions be chemically different yet so similar in the way they are transformed to their metal forms by bacteria?
This opinion review explores the microbiology of tellurite, TeO32− and selenite, SeO32− oxyanions, two similar Group 16 chalcogen elements, but with slightly different physicochemical properties that lead to intr...
Citation: Biological Research 2022 55:17 -
Anaerobic RSH-dependent tellurite reduction contributes to Escherichia coli tolerance against tellurite
Tellurium is a rare metalloid that exerts high toxicity on cells, especially on bacteria, partly due to reactive oxygen species (ROS) generation. Moreover, it has also been observed that tellurite can target f...
Citation: Biological Research 2022 55:13 -
Biomineralization of lithium nanoparticles by Li-resistant Pseudomonas rodhesiae isolated from the Atacama salt flat
The Atacama salt flat is located in northern Chile, at 2300 m above sea level, and has a high concentration of lithium, being one of the main extraction sites in the world. The effect of lithium on microorgani...
Citation: Biological Research 2022 55:12 -
Cobalamin cbiP mutant shows decreased tolerance to low temperature and copper stress in Listeria monocytogenes
Listeria monocytogenes is a foodborne pathogen that causes listeriosis in humans. This pathogen activates multiple regulatory mechanisms in response to stress, and cobalamin biosynthesis might have a potential ro...
Citation: Biological Research 2022 55:9 -
Genetic regulation of the ompX porin of Salmonella Typhimurium in response to hydrogen peroxide stress
Salmonella Typhimurium is a Gram-negative pathogen that causes a systemic disease in mice resembling typhoid fever. During its infective cycle, S. Typhimurium is phagocytized by macrophages and proliferates insid...
Citation: Biological Research 2022 55:8 -
The OxyR and SoxR transcriptional regulators are involved in a broad oxidative stress response in Paraburkholderia xenovorans LB400
Aerobic metabolism generates reactive oxygen species that may cause critical harm to the cell. The aim of this study is the characterization of the stress responses in the model aromatic-degrading bacterium Parab...
Citation: Biological Research 2022 55:7