Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 131.69 kDa 
• Atom Count: 10292 
• Residue Count: 1196 
• Unique protein chains: 1

4LW2

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

• DOI: 10.2210/pdb4LW2/pdb

• Classification: LYASE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-07-26 Released: 2013-08-07 
• Deposition Author(s): Kim, S., Park, S.Y.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.212 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 

Literature

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

Kim, S., Park, S.Y.

(2013) J Biol Chem 

• PubMed: 23913692 
• DOI: 10.1074/jbc.M113.480277
• Primary Citation of Related Structures:  
  4LW2, 4LW4


• PubMed Abstract: 
  

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 is 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. Here, we report the structures of CsdA and the 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.

---

Organizational Affiliation: 

From the School of Systems Biomedical Science, Soongsil University, Seoul 156-743, Korea.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cysteine sulfinate desulfinase	A, B, C	404	Escherichia coli K-12	Mutation(s): 0  Gene Names: b2810, csdA, JW2781, ygdJ EC: 4.4.1 (PDB Primary Data), 2.8.1.7 (UniProt), 4.4.1.16 (UniProt)
Find proteins for Q46925 (Escherichia coli (strain K12)) Explore Q46925  Go to UniProtKB:  Q46925

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLP	A, B, C	PYRIDOXAL-5'-PHOSPHATE C8 H10 N O6 P NGVDGCNFYWLIFO-UHFFFAOYSA-N
GOL	A, B, C	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.212 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 168.298	α = 90
b = 91.441	β = 97.26
c = 83.894	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-07-26 
• Released Date: 2013-08-07 
Deposition Author(s): Kim, S., Park, S.Y.

Revision History 

• Version 1.0: 2013-08-07
  Type: Initial release
  
• Version 1.1: 2013-08-21
  Changes: Database references