Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Macromolecule Content

• Total Structure Weight: 72.72 kDa 
• Atom Count: 5086 
• Modelled Residue Count: 634 
• Deposited Residue Count: 680 
• Unique protein chains: 1

3IL9

Structure of E. coli FabH

• DOI: 10.2210/pdb3IL9/pdb

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


• Deposited: 2009-08-06 Released: 2009-08-25 
• Deposition Author(s): Gajiwala, K.S., Margosiak, S., Lu, J., Cortez, J., Su, Y., Nie, Z., Appelt, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.213 
• R-Value Work: 0.182 
• R-Value Observed: 0.185 

Literature

Crystal structures of bacterial FabH suggest a molecular basis for the substrate specificity of the enzyme.

Gajiwala, K.S., Margosiak, S., Lu, J., Cortez, J., Su, Y., Nie, Z., Appelt, K.

(2009) FEBS Lett 583: 2939-2946

• PubMed: 19665020 
• DOI: 10.1016/j.febslet.2009.08.001
• Primary Citation of Related Structures:  
  3IL3, 3IL4, 3IL5, 3IL6, 3IL7, 3IL9


• PubMed Abstract: 
  

FabH (beta-ketoacyl-acyl carrier protein synthase III) is unique in that it initiates fatty acid biosynthesis, is inhibited by long-chain fatty acids providing means for feedback control of the process, and dictates the fatty acid profile of the organism by virtue of its substrate specificity. We report the crystal structures of bacterial FabH enzymes from four different pathogenic species: Enterococcus faecalis, Haemophilus influenzae, Staphylococcus aureus and Escherichia coli. Structural data on the enzyme from different species show important differences in the architecture of the substrate-binding sites that parallel the inter-species diversity in the substrate specificities of these enzymes.

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Organizational Affiliation: 

Quorex Pharmaceuticals, Carlsbad, CA 92008, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-oxoacyl-[acyl-carrier-protein] synthase 3	A, B	340	Escherichia coli K-12	Mutation(s): 0  Gene Names: b1091, fabH, JW1077 EC: 2.3.1.180
Find proteins for P0A6R0 (Escherichia coli (strain K12)) Explore P0A6R0  Go to UniProtKB:  P0A6R0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CSD	A,B	L-PEPTIDE LINKING	C3 H7 N O4 S		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.213 
• R-Value Work: 0.182 
• R-Value Observed: 0.185 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.079	α = 90
b = 66.871	β = 90
c = 161.503	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
CNX	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-08-06 
• Released Date: 2009-08-25 
Deposition Author(s): Gajiwala, K.S., Margosiak, S., Lu, J., Cortez, J., Su, Y., Nie, Z., Appelt, K.

Revision History  

• Version 1.0: 2009-08-25
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2014-11-19
  Changes: Non-polymer description
• Version 1.3: 2018-01-24
  Changes: Structure summary