Journal
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
Volume 21, Issue 5, Pages 464-469Publisher
KOREAN SOC MICROBIOLOGY & BIOTECHNOLOGY
DOI: 10.4014/jmb.1101.01020
Keywords
Acidithiobacillus ferrooxidans; ArsH; flavoprotein; ferric reductase
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Funding
- National Natural Science Foundation of the P. R. China [30900024]
- Ministry of Education of China [200805331034]
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The arsH gene is one of the arsenic resistance system in bacteria and eukaryotes. The ArsH protein was annotated as a NADPH-dependent flavin mononucleotide (FMN) reductase with unknown biological function. Here we report for the first time that the ArsH protein showed high ferric reductase activity. G1u104 was an essential residue for maintaining the stability of the FMN cofactor. The ArsH protein may perform an important role for cytosolic ferric iron assimilation in vivo.
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