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Selenoprotein inAspergillus terreus

  • Shadia E. Ramadan
  • A. A. Razak
Article

Abstract

Aspergillus terreus, a moderately selenium-tolerant fungus, metabolized75 Se-selenite into several protein seleno-amino acids: selenomethionine and selenocysteine, as well as, nonprotein seleno-amino acids, selenocystathionine, and y-glutamyl selenomethyl selenocysteine. The results indicate the failure of the fungus to discriminate between sulphur and selenium. Selenium was also incorporated into several proteins of different molecular weights, mostly of low molecular weight proteins. Labeled studies showed the presence of high levels of selenomethionine and selenocysteine in the protein hydrolysate. The actual incorporation of protein selenoamino acids into the fungal protein was proven. The results demonstrated a finding that detracts from previous held views.

Index Entries

Aspergillus terreus selenite metabolism selenotolerant fungus selenocystathionine selenomethionine selenocysteine y-glutamyl se-methyl selenocysteine, seleno-protein 

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Copyright information

© The Humana Press Inc. 1988

Authors and Affiliations

  • Shadia E. Ramadan
    • 1
  • A. A. Razak
    • 2
  1. 1.Faculty of Science for GirlsAl-Azhar UniversityCairoEgypt
  2. 2.Departments of Botany, Faculty of ScienceAl-Azhar UniversityCairoEgypt

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