X-ray structures of Nfs2, the plastidial cysteine desulfurase from Arabidopsis thaliana

Cysteine desulfurases (CDs) are enzymes that provide sulfur for several biological processes, including the synthesis of iron–sulfur clusters. The difference in the capacity of the two existing groups of CDs to interact with various partners seems to depend on the flexibility of an extended lobe that harbours the catalytic cysteine.