Microbial ferric iron reductases
نویسندگان
چکیده
منابع مشابه
Acquisition of iron by enterococci: some properties and role of assimilating ferric iron reductases.
Ferric iron reductases activities have been occurred in 91% of investigated enterococci strains. Maximum activity occurred with coenzyme NADH as the reductant and the presence of cofactor FMN was necessary. Mg(II) ions has not stimulated reductases activity. Treatment of cells with proteolytic enzymes had not effect on iron reduction. The whole cells and cell fraction-cytoplasmic membrane and c...
متن کاملEvaluation of electron-shuttling compounds in microbial ferric iron reduction.
Iron-reducing bacteria can transfer electrons to ferric iron oxides which are barely soluble at neutral pH, and electron-shuttling compounds or chelators are discussed to be involved in this process. Experiments using semipermeable membranes for separation of ferric iron-reducing bacteria from ferric iron oxides do not provide conclusive results in this respect. Here, we used ferrihydrite embed...
متن کاملThe Fungal Pathogen Candida glabrata Does Not Depend on Surface Ferric Reductases for Iron Acquisition
Iron acquisition is a crucial virulence determinant for many bacteria and fungi, including the opportunistic fungal pathogens Candida albicans and C. glabrata. While the diverse strategies used by C. albicans for obtaining iron from the host are well-described, much less is known about the acquisition of this micronutrient from host sources by C. glabrata - a distant relative of C. albicans wit...
متن کاملRole of ferric reductases in iron acquisition and virulence in the fungal pathogen Cryptococcus neoformans.
Iron acquisition is critical for the ability of the pathogenic yeast Cryptococcus neoformans to cause disease in vertebrate hosts. In particular, iron overload exacerbates cryptococcal disease in an animal model, defects in iron acquisition attenuate virulence, and iron availability influences the expression of major virulence factors. C. neoformans acquires iron by multiple mechanisms, includi...
متن کاملSimultaneous microbial reduction of iron(III) and arsenic(V) in suspensions of hydrous ferric oxide.
Bacterial reduction of arsenic(V) and iron(III) oxides influences the redox cycling and partitioning of arsenic (As) between solid and aqueous phases in sediment-porewater systems. Two types of anaerobic bacterial incubations were designed to probe the relative order of As(V) and Fe(III) oxide reduction and to measure the effect of adsorbed As species on the rate of iron reduction, using hydrou...
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ژورنال
عنوان ژورنال: FEMS Microbiology Reviews
سال: 2003
ISSN: 1574-6976
DOI: 10.1016/s0168-6445(03)00043-3