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Transmembrane topology of FRO2, a ferric chelate reductase from Arabidopsis thaliana

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Author

Summary, in English

Iron uptake in Arabidopsis thaliana is mediated by ferric chelate reductase FRO2, a transmembrane protein belonging to the flavocytochrome b family. There is no high resolution structural information available for any member of this family. We have determined the transmembrane topology of FRO2 experimentally using the alkaline phosphatase fusion method. The resulting topology is different from that obtained by theoretical predictions and contains 8 transmembrane helices, 4 of which build up the highly conserved core of the protein. This core is present in the entire flavocytochrome b family. The large water soluble domain of FRO2, which contains NADPH, FAD and oxidoreductase sequence motifs, was located on the inside of the membrane.

Publishing year

2006

Language

English

Pages

215-221

Publication/Series

Plant Molecular Biology

Volume

62

Issue

1-2

Document type

Journal article

Publisher

Springer

Topic

  • Biological Sciences

Keywords

  • gp91phox
  • FRO2
  • ferric-chelate reductases
  • oxidases
  • superoxide generating NADPH
  • iron transport
  • alkaline phosphatase

Status

Published

ISBN/ISSN/Other

  • ISSN: 1573-5028