1W0I

Arabidopsis thaliana Mitochondrial KAS

• PDB DOI: https://doi.org/10.2210/pdb1W0I/pdb

• Classification: SYNTHASE
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-06-04 Released: 2004-11-10 
• Deposition Author(s): Olsen, J.G., Rasmussen, A.V., von Wettstein-Knowles, P., Henriksen, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.221 
• R-Value Work: 0.178 
• R-Value Observed: 0.178 

Starting Model: experimental

Literature

Structure of the mitochondrial beta-ketoacyl-[acyl carrier protein] synthase from Arabidopsis and its role in fatty acid synthesis.

Olsen, J.G., Rasmussen, A.V., von Wettstein-Knowles, P., Henriksen, A.

(2004) FEBS Lett 577: 170-174

• PubMed: 15527780 
• DOI: https://doi.org/10.1016/j.febslet.2004.10.007
• Primary Citation of Related Structures:  
  1W0I


• PubMed Abstract: 
  

  Mitochondrial fatty acid synthesis is catalyzed by a dissociated fatty acid synthase similar to those of plant plastids and bacteria. The crystal structure of a mitochondrial beta-ketoacyl-[acyl carrier protein] synthase (mtKAS), namely that from Arabidopsis thaliana, has been determined for the first time. This enzyme accomplishes the vital condensation steps in constructing fatty acid carbon skeletons. The product profile of mtKAS is unusual in that C8 and C(14-16) fatty acyl chains predominate. An enzyme architecture that likely is the basis for the observed bimodal profile of mtKAS products can be derived from the shape of the acyl binding pocket.

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Organizational Affiliation: 

Carlsberg Laboratory, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 92.29 kDa 
• Atom Count: 7,040 
• Modelled Residue Count: 862 
• Deposited Residue Count: 862 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-OXOACYL CARRIER PROTEIN SYNTHASE	A, B	431	Arabidopsis thaliana	Mutation(s): 0  EC: 2.3.1.41
UniProt
Find proteins for Q8L3X9 (Arabidopsis thaliana) Explore Q8L3X9  Go to UniProtKB:  Q8L3X9

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	D [auth A], E [auth A], G [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
K	C [auth A], F [auth B]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.221 
• R-Value Work: 0.178 
• R-Value Observed: 0.178 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.218	α = 90
b = 93.246	β = 106.43
c = 74.007	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-11-10 
Deposition Author(s): Olsen, J.G., Rasmussen, A.V., von Wettstein-Knowles, P., Henriksen, A.

Revision History  

• Version 1.0: 2004-11-10
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-17
  Changes: Database references, Structure summary
• Version 1.4: 2018-01-24
  Changes: Source and taxonomy
• Version 1.5: 2019-07-24
  Changes: Data collection
• Version 1.6: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description