4EB7

A. fulgidus IscS-IscU complex structure

• PDB DOI: https://doi.org/10.2210/pdb4EB7/pdb

• Classification: Transferase/metal binding protein
• Organism(s): Archaeoglobus fulgidus DSM 4304
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-03-23 Released: 2012-05-02 
• Deposition Author(s): Marinoni, E.N., de Oliveira, J.S., Nicolet, Y., Raulfs, E.C., Amara, P., Dean, D.R., Fontecilla-Camps, J.C.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.273 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 

Literature

(IscS-IscU)2 complex structures provide insights into Fe2S2 biogenesis and transfer.

Marinoni, E.N., de Oliveira, J.S., Nicolet, Y., Raulfs, E.C., Amara, P., Dean, D.R., Fontecilla-Camps, J.C.

(2012) Angew Chem Int Ed Engl 51: 5439-5442

• PubMed: 22511353 
• DOI: https://doi.org/10.1002/anie.201201708
• Primary Citation of Related Structures:  
  4EB5, 4EB7

---

Organizational Affiliation: 

Metalloproteins Unit, Institut de Biologie Structurale J. P. Ebel, Commissariat à l'Énergie Atomique, Centre National de la Recherche Scientifique, Université Joseph Fourier, Grenoble, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 102.08 kDa 
• Atom Count: 6,517 
• Modelled Residue Count: 890 
• Deposited Residue Count: 917 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable cysteine desulfurase 2	A, B	382	Archaeoglobus fulgidus DSM 4304	Mutation(s): 0  Gene Names: iscS2, AF_0564 EC: 2.8.1.7
UniProt
Find proteins for O29689 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16)) Explore O29689  Go to UniProtKB:  O29689

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
NifU protein (NifU-1)	C	153	Archaeoglobus fulgidus DSM 4304	Mutation(s): 0  Gene Names: AF_0185, AF_0565
UniProt
Find proteins for P0DMG2 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16)) Explore P0DMG2  Go to UniProtKB:  P0DMG2

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLP	D [auth A], H [auth B]	PYRIDOXAL-5'-PHOSPHATE C8 H10 N O6 P NGVDGCNFYWLIFO-UHFFFAOYSA-N
EPE	G [auth A]	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N
FES	J [auth C], K [auth C]	FE2/S2 (INORGANIC) CLUSTER Fe2 S2 NIXDOXVAJZFRNF-UHFFFAOYSA-N
GOL	E [auth A], F [auth A], I [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.273 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.469	α = 90
b = 96.129	β = 90
c = 152.793	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-05-02 
Deposition Author(s): Marinoni, E.N., de Oliveira, J.S., Nicolet, Y., Raulfs, E.C., Amara, P., Dean, D.R., Fontecilla-Camps, J.C.

Revision History  

• Version 1.0: 2012-05-02
  Type: Initial release
  
• Version 1.1: 2013-01-02
  Changes: Database references
• Version 1.2: 2024-02-28
  Changes: Advisory, Data collection, Database references, Derived calculations