• Publications
  • Influence
Life in acid: pH homeostasis in acidophiles.
Microorganisms that have a pH optimum for growth of less than pH 3 are termed "acidophiles". To grow at low pH, acidophiles must maintain a pH gradient of several pH units across the cellularExpand
  • 358
  • 30
  • PDF
Cytoplasmic pH measurement and homeostasis in bacteria and archaea.
Of all the molecular determinants for growth, the hydronium and hydroxide ions are found naturally in the widest concentration range, from acid mine drainage below pH 0 to soda lakes above pH 13.Expand
  • 311
  • 25
  • PDF
Growth in sulfidic mineral environments: metal resistance mechanisms in acidophilic micro-organisms.
Acidophilic micro-organisms inhabit some of the most metal-rich environments known, including both natural and man-made ecosystems, and as such are ideal model systems for study of microbial metalExpand
  • 299
  • 16
  • PDF
Characterization of Ferroplasma Isolates and Ferroplasma acidarmanus sp. nov., Extreme Acidophiles from Acid Mine Drainage and Industrial Bioleaching Environments
ABSTRACT Three recently isolated extremely acidophilic archaeal strains have been shown to be phylogenetically similar to Ferroplasma acidiphilum YT by 16S rRNA gene sequencing. All four FerroplasmaExpand
  • 181
  • 16
Potential Role of Thiobacillus caldus in Arsenopyrite Bioleaching
ABSTRACT We investigated the potential role of the three strains ofThiobacillus caldus (KU, BC13, and C-SH12) in arsenopyrite leaching in combination with a moderately thermophilic ironExpand
  • 199
  • 11
Sulfur Metabolism in the Extreme Acidophile Acidithiobacillus Caldus
Given the challenges to life at low pH, an analysis of inorganic sulfur compound (ISC) oxidation was initiated in the chemolithoautotrophic extremophile Acidithiobacillus caldus. A. caldus is able toExpand
  • 106
  • 10
  • PDF
Reduced sulfur compound oxidation by Thiobacillus caldus.
The oxidation of reduced inorganic sulfur compounds was studied by using resting cells of the moderate thermophile Thiobacillus caldus strain KU. The oxygen consumption rate and total oxygen consumedExpand
  • 88
  • 7
  • PDF
Draft genome sequence of the extremely acidophilic biomining bacterium Acidithiobacillus thiooxidans ATCC 19377 provides insights into the evolution of the Acidithiobacillus genus.
Acidithiobacillus thiooxidans is a mesophilic, extremely acidophilic, chemolithoautotrophic gammaproteobacterium that derives energy from the oxidation of sulfur and inorganic sulfur compounds. HereExpand
  • 71
  • 7
Extreme arsenic resistance by the acidophilic archaeon ‘Ferroplasma acidarmanus’ Fer1
Abstract‘Ferroplasma acidarmanus’ Fer1 is an arsenic-hypertolerant acidophilic archaeon isolated from the Iron Mountain mine, California; a site characterized by heavy metals contamination. TheExpand
  • 74
  • 7
Bacterial oxidation of ferrous iron at low temperatures
This study comprises the first report of ferrous iron oxidation by psychrotolerant, acidophilic iron‐oxidizing bacteria capable of growing at 5°C. Samples of mine drainage‐impacted surface soils andExpand
  • 73
  • 7