Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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: 69.57 kDa 
• Atom Count: 5876 
• Modelled Residue Count: 639 
• Deposited Residue Count: 639 
• Unique protein chains: 1

4CW4

Crystal structure of the noncanonical ketosynthase FabY from P. aeruginosa

• PDB DOI: 10.2210/pdb4CW4/pdb

• Classification: TRANSFERASE
• Organism(s): Pseudomonas aeruginosa PAO1
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2014-04-01 Released: 2014-12-17 
• Deposition Author(s): Bukhari, H.S.T., Jakob, R.P., Maier, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.177 
• R-Value Work: 0.148 
• R-Value Observed: 0.148 

Literature

Evolutionary Origins of the Multienzyme Architecture of Giant Fungal Fatty Acid Synthase.

Bukhari, H.S., Jakob, R.P., Maier, T.

(2014) Structure 22: 1775

• PubMed: 25456814 
• DOI: 10.1016/j.str.2014.09.016
• Primary Citation of Related Structures:  
  4CW4, 4CW5


• PubMed Abstract: 
  

Fungal fatty acid synthase (fFAS) is a key paradigm for the evolution of complex multienzymes. Its 48 functional domains are embedded in a matrix of scaffolding elements, which comprises almost 50% of the total sequence and determines the emergent multienzymes properties of fFAS. Catalytic domains of fFAS are derived from monofunctional bacterial enzymes, but the evolutionary origin of the scaffolding elements remains enigmatic. Here, we identify two bacterial protein families of noncanonical fatty acid biosynthesis starter enzymes and trans-acting polyketide enoyl reductases (ERs) as potential ancestors of scaffolding regions in fFAS. The architectures of both protein families are revealed by representative crystal structures of the starter enzyme FabY and DfnA-ER. In both families, a striking structural conservation of insertions to scaffolding elements in fFAS is observed, despite marginal sequence identity. The combined phylogenetic and structural data provide insights into the evolutionary origins of the complex multienzyme architecture of fFAS.

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Organizational Affiliation: 

Biozentrum, Universität Basel, Klingelbergstrasse 50/70, 4056 Basel, Switzerland. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-KETOACYL SYNTHASE	A	639	Pseudomonas aeruginosa PAO1	Mutation(s): 0  Gene Names: fabY, PA5174 EC: 2.3.1.180
UniProt
Find proteins for Q9HU15 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore Q9HU15  Go to UniProtKB:  Q9HU15

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	C [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 0.177 
• R-Value Work: 0.148 
• R-Value Observed: 0.148 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 99.37	α = 90
b = 123.31	β = 90
c = 100.62	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-04-01 
• Released Date: 2014-12-17 
Deposition Author(s): Bukhari, H.S.T., Jakob, R.P., Maier, T.

Revision History  

• Version 1.0: 2014-12-17
  Type: Initial release
  
• Version 2.0: 2019-10-23
  Changes: Atomic model, Data collection, Other