4lw2

Structural changes during cysteine desulfurase CsdA and sulfur-acceptor CsdE interactions provide insight into the trans-persulfuration

spinqualitylabelsall models 4lw2, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4lw2 is a 3 chain structure with sequence from Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: GOL, PLP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CSDA_ECOLI Catalyzes the removal of elemental sulfur and selenium atoms from L-cysteine, L-cystine, L-selenocysteine, and L-selenocystine to produce L-alanine. L-cysteine sulfinic acid is the best substrate. Functions as a selenium delivery protein in the pathway for the biosynthesis of selenophosphate. Publication Abstract from PubMed In Escherichia coli, three cysteine desulfurases (IscS, SufS and CsdA) initiate the delivery of sulfur for various biological processes such as the biogenesis of Fe-S clusters. The sulfur generated as persulfide on a cysteine residue of cysteine desulfurases are further transferred to Fe-S scaffolds (e.g. IscU), or to intermediate cysteine-containing sulfur-acceptors (e.g. TusA, SufE, and CsdE) prior to its utilization. Herein, we report structures of CsdA, and CsdA-CsdE complex, which provide insight into the sulfur transfer mediated by the trans-persulfuration reaction. Analysis of the structures indicates that the conformational flexibility of the active cysteine loop in CsdE is essential for accepting the persulfide from the cysteine of CsdA. Additionally, CsdA and CsdE invoke a different binding mode than those of previously reported cysteine desulfurase (IscS) and sulfur-acceptors (TusA and IscU). Moreover, the conservation of interaction-mediating residues between CsdA/SufS and CsdE/SufE further suggests that the SufS-SufE interface likely resembles that of CsdA and CsdE. Structural changes during cysteine desulfurase CsdA and sulfur-acceptor CsdE interactions provide insight into the trans-persulfuration.,Kim S, Park S J Biol Chem. 2013 Aug 2. PMID:23913692 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cysteine desulfurase 3D structures

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