The essential role of Glu-185 and Tyr-354 residues in the ferroxidase activity of Saccharomyces cerevisiae Fet3
In: FEBS Letters, , Heft 2-3, S. 283-286
Online
unknown
Zugriff:
The structural determinants required for ferroxidase activity by the yeast multicopper oxidase Fet3 have been partially clarified by site-directed mutagenesis based on homology modeling. Glu-185 and Tyr-354 were substituted with Ala and Phe, respectively. Fet3 E185A retained ca. 5% residual ferroxidase catalytic efficiency, and almost 40% oxidase efficiency. On the other hand, Fet3 Y354F exhibited 50% residual efficiency as a ferroxidase and more than 70% as an oxidase. These results provide new insights in the mechanism of iron binding and oxidation by Fet3, establishing the essential role of Glu-185 and Tyr-354, and allowing to dissect ferroxidase from non-iron oxidase activity.
Titel: |
The essential role of Glu-185 and Tyr-354 residues in the ferroxidase activity of Saccharomyces cerevisiae Fet3
|
---|---|
Autor/in / Beteiligte Person: | Maria Carmela Bonaccorsi di Patti ; Angela Pia Camuti ; Lania, Amalia ; Musci, Giovanni ; Maria Rosa Felice |
Link: | |
Zeitschrift: | FEBS Letters, , Heft 2-3, S. 283-286 |
Veröffentlichung: | Federation of European Biochemical Societies. Published by Elsevier B.V. |
Medientyp: | unknown |
ISSN: | 0014-5793 (print) |
DOI: | 10.1016/S0014-5793(00)01435-6 |
Schlagwort: |
|
Sonstiges: |
|