Download MendeleyX-ray structures of Nfs2, the plastidial cysteine desulfurase from Arabidopsis thaliana.
Roret, T., Pegeot, H., Couturier, J., Mulliert, G., Rouhier, N., Didierjean, C.(2014) Acta Crystallogr Sect F Struct Biol Cryst Commun 70: 1180-1185
- PubMed: 25195888
- DOI: https://doi.org/10.1107/S2053230X14017026
- Primary Citation of Related Structures:
4Q75, 4Q76 - PubMed Abstract:
The chloroplastic Arabidopsis thaliana Nfs2 (AtNfs2) is a group II pyridoxal 5'-phosphate-dependent cysteine desulfurase that is involved in the initial steps of iron-sulfur cluster biogenesis. The group II cysteine desulfurases require the presence of sulfurtransferases such as SufE proteins for optimal activity. Compared with group I cysteine desulfurases, proteins of this group contains a smaller extended lobe harbouring the catalytic cysteine and have a β-hairpin constraining the active site. Here, two crystal structures of AtNfs2 are reported: a wild-type form with the catalytic cysteine in a persulfide-intermediate state and a C384S variant mimicking the resting state of the enzyme. In both structures the well conserved Lys241 covalently binds pyridoxal 5'-phosphate, forming an internal aldimine. Based on available homologous bacterial complexes, a model of a complex between AtNfs2 and the SufE domain of its biological partner AtSufE1 is proposed, revealing the nature of the binding sites.
Organizational Affiliation:
Université de Lorraine, UMR 7036 CRM2, BioMod Group, BP 70239, 54506 Vandoeuvre-lès-Nancy, France.
