scholarly journals A proton shelter inspired by the sugar coating of acidophilic archaea

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Xiumei Wang ◽  
Bei’er Lv ◽  
Guixin Cai ◽  
Long Fu ◽  
Yuanzi Wu ◽  
...  
Keyword(s):  
Acidophilic Archaea

Interspecies Interactions of Metal-Oxidizing Thermo-Acidophilic Archaea Acidianus and Sulfolobus

2015 ◽  
Vol 1130 ◽  
pp. 105-108 ◽  
Author(s):  
Rui Yong Zhang ◽  
Jing Liu ◽  
Thomas R. Neu ◽  
Qian Li ◽  
Sören Bellenberg ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Laser Scanning ◽  
Fluorescent Dyes ◽  
Mine Drainage ◽  
Cell Attachment ◽  
Thermophilic Bacteria ◽  
Laser Scanning Microscopy ◽  
Physical Contact ◽  
Confocal Laser ◽  
Acidophilic Archaea

Biofilm formation of microorganisms on relevant surfaces is of great importance for biomining and acid mine drainage (AMD). Thermo-acidophilic archaea like Acidianus, Sulfolobus and Metallosphaera are of special interest due to their ability to enhance leaching rates. Visualization and investigation of microbial attachment and biofilm formation of metal-oxidizing organisms up to now has been done mostly with mesophilic or moderately thermophilic bacteria. In this study, attachment and biofilms by the crenarchaeota Sulfolobus metallicus DSM 6482T and a new isolate Acidianus sp. DSM 29099 on sulfur or pyrite were analyzed. Confocal laser scanning microscopy (CLSM) combined with fluorescent dyes specific for nucleic acids or glycoconjugates were used to monitor biofilm formation on surfaces. The data indicate that cell attachment and the subsequently formed biofilm structures were species and substrate dependent. The investigation of binary biofilms on pyrite showed that both species were heterogeneously distributed on pyrite surfaces in the form of individual cells or microcolonies. In addition, physical contact between the two species was visible, as revealed by specific lectins able to distinguish single species.

scholarly journals Spatial and Temporal Analysis of the Microbial Community in the Tailings of a Pb-Zn Mine Generating Acidic Drainage

2011 ◽  
Vol 77 (15) ◽  
pp. 5540-5544 ◽  
Author(s):  
Li-Nan Huang ◽  
Wen-Hua Zhou ◽  
Kevin B. Hallberg ◽  
Cai-Yun Wan ◽  
Jie Li ◽  
...  
Keyword(s):  
Microbial Community ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Temporal Analysis ◽  
Temporal Variations ◽  
Microbial Populations ◽  
Content Type ◽  
Tailings Impoundment ◽  
Spatial And Temporal Analysis ◽  
Acidophilic Archaea

ABSTRACTAnalysis of spatial and temporal variations in the microbial community in the abandoned tailings impoundment of a Pb-Zn mine revealed distinct microbial populations associated with the different oxidation stages of the tailings. AlthoughAcidithiobacillus ferrooxidansandLeptospirillumspp. were consistently present in the acidic tailings, acidophilic archaea, mostlyFerroplasma acidiphilum, were predominant in the oxidized zones and the oxidation front, indicating their importance to generation of acid mine drainage.

scholarly journals Environmental, Biogeographic, and Biochemical Patterns of Archaea of the Family Ferroplasmaceae

2011 ◽  
Vol 77 (15) ◽  
pp. 5071-5078 ◽  
Author(s):  
Olga V. Golyshina
Keyword(s):  
Cell Wall ◽  
Research Progress ◽  
Current Status ◽  
Content Type ◽  
Research Areas ◽  
Physiological Diversity ◽  
New Family ◽  
The Family ◽  
Acidophilic Archaea

ABSTRACTAbout 10 years ago, a new family of cell wall-deficient, iron-oxidizing archaea,Ferroplasmaceae, within the large archaeal phylumEuryarchaeota, was described. In this minireview, I summarize the research progress achieved since then and report on the current status of taxonomy, biogeography, physiological diversity, biochemistry, and other research areas involving this exciting group of acidophilic archaea.

scholarly journals Pyrite Biooxidation by Acidophilic Archaea AcidiplasmaSp. MBA-1 Under Varied Conditions

2022 ◽  
Author(s):  
Aleksandr Bulaev
Keyword(s):  
Potential Role ◽  
Sulfide Mineral ◽  
High Rate ◽  
Mineral Nutrient ◽  
Acidophilic Microorganisms ◽  
Moderately Thermophilic ◽  
Operational Temperature ◽  
Low Levels ◽  
Acidophilic Archaea

The goal of this research was to study pyrite (FeS2 ) bioleaching by a strain of the genus Acidiplasma under different conditions (temperature, pH) to evaluate the potential role of Acidiplasma representatives in biooxidation of this sulfide mineral. To compare the role of Acidiplasma archaea in pyrite biooxidation with other acidophilic microorganisms, the experiments were also performed with representatives of othergroups of microorganisms predominant in biohydrometallurgical processes.Pure and mixed cultures of moderately thermophilic acidophilic microorganisms, including strains Acidithiobacillus caldus MBC-1, Sulfobacillusthermosulfidooxidans VKMV 1269T and Acidiplasmasp. MBA-1, were used. The experiments were carried out in flasks with 100 mL of mineral nutrient medium supplemented with 0.02% yeast extract and 1 g of pyrite on a rotary shaker for 20 days. Bioleaching was performed at 45, 55, and 60∘С. The results demonstrated that the representatives of the genus Acidiplasmaprovided a comparatively higher rate of pyrite bioleaching at high temperatures (55 and 60∘C) and low pH of the medium (1.0). Thus, according to the results, strains of thegenus Acidiplasma may provide a high rate of pyrite bioleaching at low levels ofpH. Therefore, the results suggest that archaea of the genus Acidiplasma may be promising microorganisms to improve bioleaching processes with an increase in the operational temperature, which is usually maintained at 40–45∘C in industrial-scale reactors. Keywords: biomining, bioleaching, acidophilic microorganisms, sulfide minerals, pyrite

scholarly journals A large scale, multiple genome comparison of acidophilic Archaea (pH ≤ 5.0) extends our understanding of oxidative stress responses in polyextreme environments

2021 ◽  
Author(s):  
Gonzalo Neira ◽  
Eva Vergara ◽  
Diego Nahuel Cortez ◽  
David S. Holmes
Keyword(s):  
Oxidative Stress ◽  
Stress Responses ◽  
Large Scale ◽  
Genomic Analysis ◽  
Low Ph ◽  
Genome Comparison ◽  
Comparative Genomic ◽  
Acidophilic Bacteria ◽  
Acidophilic Archaea ◽  
Oxidative Stress Responses

Acidophilic Archaea thrive in anaerobic and aerobic low pH environments (<pH 5) rich in dissolved heavy metals that exacerbate stress caused by the production of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2), hydroxyl radical (·OH) and superoxide (O2·−). ROS react with lipids, proteins and nucleic acids causing oxidative stress and damage that can lead to cell death. Herein, genes and mechanisms potentially involved in ROS mitigation are predicted in over 200 genomes of acidophilic Archaea with sequenced genomes. These organisms can be subjected to simultaneous multiple stresses such as high temperature, high salinity, low pH and high heavy metal loads. Some of the topics addressed include: (1) the phylogenomic distribution of these genes and what can this tell us about the evolution of these mechanisms in acidophilic Archaea; (2) key differences in genes and mechanisms used by acidophilic versus non-acidophilic Archaea and between acidophilic Archaea and acidophilic Bacteria and (3) how comparative genomic analysis predicts novel genes or pathways involved in oxidative stress responses in Archaea and possible Horizontal Gene Transfer (HGT) events.

Biofilm formation and interspecies interactions in mixed cultures of thermo-acidophilic archaea Acidianus spp. and Sulfolobus metallicus

2016 ◽  
Vol 167 (7) ◽  
pp. 604-612 ◽  
Author(s):  
Camila Castro ◽  
Ruiyong Zhang ◽  
Jing Liu ◽  
Sören Bellenberg ◽  
Thomas R. Neu ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Mixed Cultures ◽  
Interspecies Interactions ◽  
Acidophilic Archaea

scholarly journals Diversity and Physiologies of Acidophilic Archaea

2016 ◽  
pp. 93-106 ◽  
Author(s):  
Olga V. Golyshina ◽  
Manuel Ferrer ◽  
Peter N. Golyshin
Keyword(s):  
Acidophilic Archaea

Synthesis of intracellular cobalt ferrite nanocrystals by extreme acidophilic archaea Ferroplasma thermophilum

2020 ◽  
Vol 27 (5) ◽  
pp. 1443-1452
Author(s):  
Bai-qiang Wu ◽  
Wan-li He ◽  
Bao-jun Yang ◽  
Rui Liao ◽  
Yi Zhou ◽  
...  
Keyword(s):  
Cobalt Ferrite ◽  
Acidophilic Archaea

scholarly journals A Large-Scale Multiple Genome Comparison of Acidophilic Archaea (pH ≤ 5.0) Extends Our Understanding of Oxidative Stress Responses in Polyextreme Environments

Antioxidants ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Gonzalo Neira ◽  
Eva Vergara ◽  
Diego Cortez ◽  
David S. Holmes
Keyword(s):  
Oxidative Stress ◽  
Stress Responses ◽  
Large Scale ◽  
Genomic Analysis ◽  
Low Ph ◽  
Genome Comparison ◽  
Comparative Genomic ◽  
Acidophilic Bacteria ◽  
Acidophilic Archaea ◽  
Oxidative Stress Responses

Acidophilic archaea thrive in anaerobic and aerobic low pH environments (pH < 5) rich in dissolved heavy metals that exacerbate stress caused by the production of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2), hydroxyl radical (OH) and superoxide (O2−). ROS react with lipids, proteins and nucleic acids causing oxidative stress and damage that can lead to cell death. Herein, genes and mechanisms potentially involved in ROS mitigation are predicted in over 200 genomes of acidophilic archaea with sequenced genomes. These organisms are often be subjected to simultaneous multiple stresses such as high temperature, high salinity, low pH and high heavy metal loads. Some of the topics addressed include: (1) the phylogenomic distribution of these genes and what this can tell us about the evolution of these mechanisms in acidophilic archaea; (2) key differences in genes and mechanisms used by acidophilic versus non-acidophilic archaea and between acidophilic archaea and acidophilic bacteria and (3) how comparative genomic analysis predicts novel genes or pathways involved in oxidative stress responses in archaea and likely horizontal gene transfer (HGT) events.

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