1AK1

FERROCHELATASE FROM BACILLUS SUBTILIS

• PDB DOI: https://doi.org/10.2210/pdb1AK1/pdb

• Classification: PROTOHEME FERRO-LYASE
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1997-05-28 Released: 1997-12-03 
• Deposition Author(s): Al-Karadaghi, S., Hansson, M., Nikonov, S., Jonsson, B., Hederstedt, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.243 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 

Literature

Crystal structure of ferrochelatase: the terminal enzyme in heme biosynthesis.

Al-Karadaghi, S., Hansson, M., Nikonov, S., Jonsson, B., Hederstedt, L.

(1997) Structure 5: 1501-1510

• PubMed: 9384565 
• DOI: https://doi.org/10.1016/s0969-2126(97)00299-2
• Primary Citation of Related Structures:  
  1AK1


• PubMed Abstract: 
  

  The metallation of closed ring tetrapyrroles resulting in the formation of hemes, chlorophylls and vitamin B12 is catalyzed by specific enzymes called chelatases. Ferrochelatase catalyzes the terminal step in heme biosynthesis by inserting ferrous ion into protoporphyrin IX by a mechanism that is poorly understood. Mutations in the human gene for ferrochelatase can result in the disease erythropoietic protoporphyria, and a further understanding of the mechanism of this enzyme is therefore of clinical interest. No three-dimensional structure of a tetrapyrrole metallation enzyme has been available until now.

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Organizational Affiliation: 

Department of Molecular Biophysics, Lund University, Box 124, S-221 00, Lund, Sweden. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 35.39 kDa 
• Atom Count: 2,678 
• Modelled Residue Count: 308 
• Deposited Residue Count: 310 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FERROCHELATASE	A	310	Bacillus subtilis	Mutation(s): 0  Gene Names: HEMH EC: 4.99.1.1
UniProt
Find proteins for P32396 (Bacillus subtilis (strain 168)) Explore P32396  Go to UniProtKB:  P32396

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.243 
• R-Value Work: 0.195 
• R-Value Observed: 0.195 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.39	α = 90
b = 50.19	β = 90
c = 120.12	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-12-03 
Deposition Author(s): Al-Karadaghi, S., Hansson, M., Nikonov, S., Jonsson, B., Hederstedt, L.

Revision History  

• Version 1.0: 1997-12-03
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Other