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Identification of iron-regulated cellular proteins, Fe3+-reducing and -chelating compounds, in the white-rot fungus Perenniporia medulla-panis.
Arantes, Valdeir; Milagres, Adriane M F.
Afiliação
  • Arantes V; Department of Biotechnology, Escola de Engenharia de Lorena, University of São Paulo - USP Lorena, Estrada Municipal do Campinho, s/no. - Cx Postal 116, 12602-810 Lorena/SP, Brazil. arantes@debiq.eel.usp.br
Can J Microbiol ; 53(12): 1323-9, 2007 Dec.
Article em En | MEDLINE | ID: mdl-18059565
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.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polyporaceae / Compostos Férricos / Ferro Tipo de estudo: Diagnostic_studies Idioma: En Revista: Can J Microbiol Ano de publicação: 2007 Tipo de documento: Article País de afiliação: Brasil País de publicação: Canadá
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polyporaceae / Compostos Férricos / Ferro Tipo de estudo: Diagnostic_studies Idioma: En Revista: Can J Microbiol Ano de publicação: 2007 Tipo de documento: Article País de afiliação: Brasil País de publicação: Canadá