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- Title
Identification of iron-regulated cellular proteins, Fe<sup>3+</sup>-reducing and -chelating compounds, in the white-rot fungus Perenniporia medulla-panis.
- Authors
Arantes, Valdeir; Milagres, Adriane M. F.
- Abstract
In this paper, we present the responses of the white-rot fungus Perenniporia medulla-panis to iron availability with regard to alterations in growth, expression of cellular proteins, Fe3+-reducing activity, and Fe3+ chelators production. Iron supplementation stimulated fungal growth but did not result in a significant increase in biomass production. Catechol and hydroxamate derivatives were produced mainly under iron deficiency, and their productions were repressed under iron supplementation conditions. Perenniporia medulla-panis showed several cellular proteins in the range of 10–90 kDa. Some of them showed negative iron-regulation. Iron-supplemented medium also repressed both cell surface and extracellular Fe3+-reducing activities; however, the highest cell surface activity was detected at the initial growth phase, whereas extracellular activity increased throughout the incubation period. No significant production of chelators and extracellular Fe3+-reducing activity were observed within the initial growth phase, suggesting that the reduction of Fe3+ to Fe2+ is performed by ferrireductases.
- Subjects
IRON chelates; FUNGI; BIOMASS; IRON deficiency diseases; CELL membranes; CYTOLOGY; GROWTH factors; PROTEINS; BIOMOLECULES; PLANTS
- Publication
Canadian Journal of Microbiology, 2007, Vol 53, Issue 12, p1323
- ISSN
0008-4166
- Publication type
Article
- DOI
10.1139/W07-102