Crystal structure of 3-ketoacyl-(acyl-carrier-protein) reductase Rickettsia prowazekii

Experimental Data Snapshot

  • Resolution: 2.25 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 

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Structure of 3-ketoacyl-(acyl-carrier-protein) reductase from Rickettsia prowazekii at 2.25 A resolution.

Subramanian, S.Abendroth, J.Phan, I.Q.Olsen, C.Staker, B.L.Napuli, A.Van Voorhis, W.C.Stacy, R.Myler, P.J.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 1118-1122

  • DOI: https://doi.org/10.1107/S1744309111030673
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Rickettsia prowazekii, a parasitic Gram-negative bacterium, is in the second-highest biodefense category of pathogens of the National Institute of Allergy and Infectious Diseases, but only a handful of structures have been deposited in the PDB for this bacterium; to date, all of these have been solved by the SSGCID. Owing to its small genome (about 800 protein-coding genes), it relies on the host for many basic biosynthetic processes, hindering the identification of potential antipathogenic drug targets. However, like many bacteria and plants, its metabolism does depend upon the type II fatty-acid synthesis (FAS) pathway for lipogenesis, whereas the predominant form of fatty-acid biosynthesis in humans is via the type I pathway. Here, the structure of the third enzyme in the FAS pathway, 3-ketoacyl-(acyl-carrier-protein) reductase, is reported at a resolution of 2.25 Å. Its fold is highly similar to those of the existing structures from some well characterized pathogens, such as Mycobacterium tuberculosis and Burkholderia pseudomallei, but differs significantly from the analogous mammalian structure. Hence, drugs known to target the enzymes of pathogenic bacteria may serve as potential leads against Rickettsia, which is responsible for spotted fever and typhus and is found throughout the world.

  • Organizational Affiliation

    Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA. sandhya.subramanian@sbri.org

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3-oxoacyl-[acyl-carrier-protein] reductase
A, B
249Rickettsia prowazekiiMutation(s): 0 
Gene Names: fabGRP762
Find proteins for P50941 (Rickettsia prowazekii (strain Madrid E))
Explore P50941 
Go to UniProtKB:  P50941
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP50941
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.16α = 90
b = 74.16β = 90
c = 183.01γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-09-21
    Changes: Database references
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Refinement description