Reaction of O2 with a diiron protein generates a mixed-valent Fe2+/Fe3+ center and peroxide [Biochemistry]

The gene encoding the cyanobacterial ferritin SynFtn is up-regulated in response to copper stress. Here, we show that, while SynFtn does not interact directly with copper, it is highly unusual in several ways. First, its catalytic diiron ferroxidase center is unlike those of all other characterized prokaryotic ferritins and instead...

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