Increases of ferrous iron oxidation activity and arsenic stressed cell growth by overexpression of Cyc2 inAcidithiobacillus ferrooxidansATCC19859

2013 ◽  
Vol 60 (6) ◽  
pp. 623-628 ◽  
Author(s):  
Wei Liu ◽  
Jianqun Lin ◽  
Xin Pang ◽  
Shuang Mi ◽  
Shuang Cui ◽  
...  
Keyword(s):  
Cell Growth ◽  
Ferrous Iron ◽  
Iron Oxidation ◽  
Oxidation Activity ◽  
Ferrous Iron Oxidation ◽  
Stressed Cell

Ferrous iron oxidation in moderately thermophilic acidophile Sulfobacillus sibiricus N1T

2010 ◽  
Vol 56 (10) ◽  
pp. 803-808 ◽  
Author(s):  
Tatiana Y. Dinarieva ◽  
Anna E. Zhuravleva ◽  
Oksana A. Pavlenko ◽  
Iraida A. Tsaplina ◽  
Alexander I. Netrusov
Keyword(s):  
Ferrous Iron ◽  
High Performance ◽  
Iron Oxidation ◽  
Early Exponential Phase ◽  
Moderately Thermophilic ◽  
Terminal Oxidases ◽  
Cytochrome Bo ◽  
Ferrous Iron Oxidation ◽  
Transport Chain ◽  
Membrane Bound

The iron-oxidizing system of a moderately thermophilic, extremely acidophilic, gram-positive mixotroph, Sulfobacillus sibiricus N1T, was studied by spectroscopic, high-performance liquid chromatography and inhibitory analyses. Hemes B, A, and O were detected in membranes of S. sibiricus N1T. It is proposed that the electron transport chain from Fe2+ to O2 is terminated by 2 physiological oxidases: aa3-type cytochrome, which dominates in the early-exponential phase of growth, and bo3-type cytochrome, whose role in iron oxidation becomes more prominent upon growth of the culture. Both oxidases were sensitive to cyanide and azide. Cytochrome aa3 was more sensitive to cyanide and azide, with Ki values of 4.1 and 2.5 µmol·L–1, respectively, compared with Ki values for cytochrome bo3, which were 9.5 µmol·L–1 for cyanide and 7.0 µmol·L–1 for azide. This is the first evidence for the participation of a bo3-type oxidase in ferrous iron oxidation. The respiratory chain of the mixotroph contains, in addition to the 2 terminal oxidases, a membrane-bound cytochrome b573.

scholarly journals A kinetic model of ferrous iron oxidation by Acidithiobacillus ferrooxidans in a batch culture

2005 ◽  
Vol 11 (2) ◽  
pp. 59-62 ◽  
Author(s):  
Dragisa Savic ◽  
Miodrag Lazic ◽  
Vlada Veljkovic ◽  
Miroslav Vrvic
Keyword(s):  
Kinetic Model ◽  
Acidithiobacillus Ferrooxidans ◽  
Ferrous Iron ◽  
Bubble Column ◽  
Iron Oxidation ◽  
Yield Coefficient ◽  
Transfer Rates ◽  
Ferrous Iron Oxidation ◽  
Menten Kinetic ◽  
Kinetics Of

The batch oxidation kinetics of ferrous iron by Acidithiobacillus ferrooxidans were examined at different oxygen transfer rates and pH in an aerated stirred tank and a bubble column. The microbial growth, oxygen consumption rate and ferrous and ferric iron were monitored during the biooxidation. A kinetic model was established on the basis of the Michaelis-Menten kinetic equation for bacterial growth and the constants estimated from experimental data (maximum specific growth rate 0.069 h-1, saturation constant 2.9 g/dm3, and biomass yield coefficient based on ferrous iron 0.003 gd.w./gFe). Values calculated from the model agreed well with the experimental ones regardless of the bioreactor type and pH conditions.

Iron targeted transcriptome study draws attention to novel redox protein candidates involved in ferrous iron oxidation in “Ferrovum” sp. JA12

2018 ◽  
Vol 169 (10) ◽  
pp. 618-627 ◽  
Author(s):  
Sophie R. Ullrich ◽  
Anja Poehlein ◽  
Gloria Levicán ◽  
Martin Mühling ◽  
Michael Schlömann
Keyword(s):  
Ferrous Iron ◽  
Iron Oxidation ◽  
Redox Protein ◽  
Ferrous Iron Oxidation

scholarly journals Increasing cell concentration does not affect specific ferrous iron oxidation rate in a continuously stirred tank bioreactor

2018 ◽  
Vol 181 ◽  
pp. 189-194
Author(s):  
Naomi J. Boxall ◽  
Ka Yu Cheng ◽  
Chris A. du Plessis ◽  
David Collinson ◽  
Christina Morris ◽  
...  
Keyword(s):  
Oxidation Rate ◽  
Ferrous Iron ◽  
Cell Concentration ◽  
Iron Oxidation ◽  
Stirred Tank ◽  
Stirred Tank Bioreactor ◽  
Ferrous Iron Oxidation

Effects of the oxygen transfer rate on ferrous iron oxidation by Thiobacillus ferrooxidans

1998 ◽  
Vol 23 (7-8) ◽  
pp. 427-431 ◽  
Author(s):  
D.S Savić ◽  
V.B Veljković ◽  
M.L Lazić ◽  
M.M Vrvić ◽  
J.I Vučetić
Keyword(s):  
Oxygen Transfer ◽  
Ferrous Iron ◽  
Transfer Rate ◽  
Thiobacillus Ferrooxidans ◽  
Iron Oxidation ◽  
Oxygen Transfer Rate ◽  
Ferrous Iron Oxidation
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