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The multi‐proteins Isc and Suf systems catalyse the biogenesis of [Fe‐S] proteins. Here we investigate how NsrR and IscR, transcriptional regulators that sense NO and [Fe‐S] homeostasis, acquire their [Fe‐S] clusters under both normal and iron limitation conditions. Clusters directed at the apo‐NsrR and apo‐IscR proteins are built on either of the two scaffolds, IscU or SufB. However, differences...
Biosynthesis of iron–sulphur (Fe‐S) proteins is catalysed by multi‐protein systems, ISC and SUF. However, ‘non‐ISC, non‐SUF’ Fe‐S biosynthesis factors have been described, both in prokaryotes and eukaryotes. Here we report in vitro and in vivo investigations of such a ‘non‐ISC, non SUF’ component, the Nfu proteins. Phylogenomic analysis allowed us to define four subfamilies. Escherichia coli NfuA...
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