Crystal structure of FabG from Synechocystis sp. PCC 6803

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 

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Structure-directed construction of a high-performance version of the enzyme FabG from the photosynthetic microorganism Synechocystis sp. PCC 6803.

Liu, Y.Feng, Y.Cao, X.Li, X.Xue, S.

(2015) FEBS Lett 589: 3052-3057

  • DOI: https://doi.org/10.1016/j.febslet.2015.09.001
  • Primary Citation of Related Structures:  
    4RZH, 4RZI

  • PubMed Abstract: 

    PhaB (acetoacetyl-CoA reductase) catalyzes the reduction of acetoacetyl-CoA to (R)-3-hydroxybutyryl-CoA in polyhydroxybutyrate (PHB) synthesis and FabG (3-ketoacyl-acyl-carrier-protein reductase) catalyzes the β-ketoacyl-ACP to yield (R)-3-hydroxyacyl-ACP in fatty acid biosynthesis. Both of them have been classified into the same group EC 1.1.1. PhaB is limited with substrate specificities, while FabG was considered as a potential PhaB due to broad substrate selectivity despite of low activity. Here, X-ray crystal structures of FabG and PhaB from the photosynthetic microorganism Synechocystis sp. PCC 6803 were resolved. Based on them, a high-performance FabG on acyl-CoA directed by structural evolution was constructed that may serve as a critical enzyme to partition carbon flow from fatty acid synthesis to PHA.

  • Organizational Affiliation

    Marine Bioengineering Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. Electronic address: xuesong@dicp.ac.cn.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3-oxoacyl-[acyl-carrier protein] reductase
A, B
247Synechocystis sp. PCC 6803Mutation(s): 0 
Gene Names: fabGMYO_110490
Find proteins for P73574 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Explore P73574 
Go to UniProtKB:  P73574
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP73574
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.174 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.602α = 90
b = 78.196β = 90
c = 120.856γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-16
    Type: Initial release
  • Version 1.1: 2015-10-21
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Data collection, Database references, Refinement description