TY - JOUR
T1 - Iron Redox Transformation by the Thermo-Acidophilic Archaea from the Genus Sulfolobus
AU - Masaki, Yusei
AU - Tsutsumi, Katsutoshi
AU - Okibe, Naoko
N1 - Funding Information:
Y.M. is thankful to financial support provided by the Kyushu University Advanced Graduate Program in Global Strategy for Green Asia.
Publisher Copyright:
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2018/10/21
Y1 - 2018/10/21
N2 - Iron redox transformations by five representative Sulfolobus strains (S. metallicus Kra23, S. tokodaii 7, S. acidocaldarius 98-3, S. solfataricus P1, S. shibatae B12) were studied to clarify the general trend of Fe metabolism across different species of the genus Sulfolobus. Negligible to major Fe(II) oxidation was detected in cell suspensions of the strains. Fe(III)-reducing ability was differently expressed in each strain with dependence on the oxygen level and growth status; growth-uncoupled cell suspensions of all strains reduced Fe(III) under either anaerobic or microaerobic conditions, or under both conditions. A linear correlation between cell growth and Fe(III) reduction was also found in S. tokodaii 7, S. solfataricus P1, and S. shibatae B12. In addition to Fe redox behaviors, the strains were also tested for reduction of highly toxic Cr(VI) to less toxic and soluble Cr(III), as an application possibility; the trend in degree of Cr(V) reduction did not necessarily correspond to that of Fe(III) reduction, suggesting the involvement of different reduction mechanisms.
AB - Iron redox transformations by five representative Sulfolobus strains (S. metallicus Kra23, S. tokodaii 7, S. acidocaldarius 98-3, S. solfataricus P1, S. shibatae B12) were studied to clarify the general trend of Fe metabolism across different species of the genus Sulfolobus. Negligible to major Fe(II) oxidation was detected in cell suspensions of the strains. Fe(III)-reducing ability was differently expressed in each strain with dependence on the oxygen level and growth status; growth-uncoupled cell suspensions of all strains reduced Fe(III) under either anaerobic or microaerobic conditions, or under both conditions. A linear correlation between cell growth and Fe(III) reduction was also found in S. tokodaii 7, S. solfataricus P1, and S. shibatae B12. In addition to Fe redox behaviors, the strains were also tested for reduction of highly toxic Cr(VI) to less toxic and soluble Cr(III), as an application possibility; the trend in degree of Cr(V) reduction did not necessarily correspond to that of Fe(III) reduction, suggesting the involvement of different reduction mechanisms.
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U2 - 10.1080/01490451.2018.1465491
DO - 10.1080/01490451.2018.1465491
M3 - Article
AN - SCOPUS:85049106859
VL - 35
SP - 757
EP - 767
JO - Geomicrobiology Journal
JF - Geomicrobiology Journal
SN - 0149-0451
IS - 9
ER -