3CU4

OmcF, Outer membrance cytochrome F from Geobacter sulfurreducens

• PDB DOI: https://doi.org/10.2210/pdb3CU4/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Geobacter sulfurreducens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-04-15 Released: 2008-10-21 
• Deposition Author(s): Pokkuluri, P.R., Schiffer, M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.183 
• R-Value Work: 0.169 
• R-Value Observed: 0.169 

Literature

Outer membrane cytochrome c, OmcF, from Geobacter sulfurreducens: High structural similarity to an algal cytochrome c(6).

Pokkuluri, P.R., Londer, Y.Y., Wood, S.J., Duke, N.E., Morgado, L., Salgueiro, C.A., Schiffer, M.

(2008) Proteins 74: 266-270

• PubMed: 18837462 
• DOI: https://doi.org/10.1002/prot.22260
• Primary Citation of Related Structures:  
  3CU4

---

Organizational Affiliation: 

Biosciences Division, Argonne National Laboratory, Lemont, Illinois 60439, USA. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 9.29 kDa 
• Atom Count: 738 
• Modelled Residue Count: 79 
• Deposited Residue Count: 85 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome c family protein	A	85	Geobacter sulfurreducens	Mutation(s): 0  Gene Names: GSU2432
UniProt
Find proteins for Q74AE4 (Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA)) Explore Q74AE4  Go to UniProtKB:  Q74AE4

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	B [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.183 
• R-Value Work: 0.169 
• R-Value Observed: 0.169 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.08	α = 90
b = 40.19	β = 90
c = 48.42	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-3000	data reduction
HKL-3000	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-10-21 
Deposition Author(s): Pokkuluri, P.R., Schiffer, M.

Revision History  

• Version 1.0: 2008-10-21
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references, Derived calculations