Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21.76 kDa 
• Atom Count: 1742 
• Residue Count: 196 
• Unique protein chains: 1

1FXA

CRYSTALLIZATION AND STRUCTURE DETERMINATION TO 2.5-ANGSTROMS RESOLUTION OF THE OXIDIZED [2FE-2S] FERREDOXIN ISOLATED FROM ANABAENA 7120

• DOI: 10.2210/pdb1FXA/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Nostoc sp. PCC 7120 = FACHB-418
• Mutation(s): No 


• Deposited: 1991-01-09 Released: 1992-07-15 
• Deposition Author(s): Rypniewski, W.R., Breiter, D.R., Benning, M.M., Wesenberg, G., Oh, B.-H., Markley, J.L., Rayment, I., Holden, H.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Observed: 0.187 

Literature

Crystallization and structure determination to 2.5-A resolution of the oxidized [2Fe-2S] ferredoxin isolated from Anabaena 7120.

Rypniewski, W.R., Breiter, D.R., Benning, M.M., Wesenberg, G., Oh, B.H., Markley, J.L., Rayment, I., Holden, H.M.

(1991) Biochemistry 30: 4126-4131

• PubMed: 1902376 
• DOI: 10.1021/bi00231a003
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The molecular structure of the oxidized form of the [2Fe-2S] ferredoxin isolated from the cyanobacterium Anabaena species strain PCC 7120 has been determined by X-ray diffraction analysis to a nominal resolution of 2.5 A and refined to a crystallographic R factor of 18.7%. Crystals used in this investigation belong to the space group P2(1)2(1)2(1) with unit cell dimensions of a = 37.42 A, b = 38.12 A, and c = 147.12 A and two molecules in the asymmetric unit. The three-dimensional structure of this ferredoxin was solved by a method that combined X-ray data from one isomorphous heavy-atom derivative with noncrystallographic symmetry averaging and solvent flattening. As in other plant-type [2Fe-2S] ferredoxins, the iron-sulfur cluster is located toward the outer edge of the molecule, and the irons are tetrahedrally coordinated by both inorganic sulfurs and sulfurs provided by protein cysteine residues. The main secondary structural elements include four strands of beta-pleated sheet and three alpha-helical regions.

---

Organizational Affiliation: 

Department of Chemistry, University of Wisconsin, Madison 53705.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
[2FE-2S] FERREDOXIN	A, B	98	Nostoc sp. PCC 7120 = FACHB-418	Mutation(s): 0  Gene Names: petF, fdxV, all4148
Find proteins for P0A3C7 (Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)) Go to UniProtKB:  P0A3C7

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FES	A, B	FE2/S2 (INORGANIC) CLUSTER Fe2 S2 NIXDOXVAJZFRNF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Observed: 0.187 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.42	α = 90
b = 38.12	β = 90
c = 147.12	γ = 90

Software Package:

Software Name	Purpose
TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1991-01-09 
• Released Date: 1992-07-15 
Deposition Author(s): Rypniewski, W.R., Breiter, D.R., Benning, M.M., Wesenberg, G., Oh, B.-H., Markley, J.L., Rayment, I., Holden, H.M.

Revision History 

• Version 1.0: 1992-07-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance