2FHS

Structure of Acyl Carrier Protein Bound to FabI, the Enoyl Reductase from Escherichia Coli

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.226 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of Acyl Carrier Protein Bound to FabI, the FASII Enoyl Reductase from Escherichia coli.

Rafi, S., Novichenok, P., Kolappan, S., Zhang, X., Stratton, C.F., Rawat, R., Kisker, C., Simmerling, C., Tonge, P.J.

(2006) J Biol Chem 281: 39285-39293

  • DOI: 10.1074/jbc.M608758200
  • Primary Citation of Related Structures:  
    2FHS

  • PubMed Abstract: 

    • Acyl carrier proteins play a central role in metabolism by transporting substrates in a wide variety of pathways including the biosynthesis of fatty acids and polyketides. However, despite their importance, there is a paucity of direct structural information concerning the interaction of ACPs with enzymes in these pathways ...

    Acyl carrier proteins play a central role in metabolism by transporting substrates in a wide variety of pathways including the biosynthesis of fatty acids and polyketides. However, despite their importance, there is a paucity of direct structural information concerning the interaction of ACPs with enzymes in these pathways. Here we report the structure of an acyl-ACP substrate bound to the Escherichia coli fatty acid biosynthesis enoyl reductase enzyme (FabI), based on a combination of x-ray crystallography and molecular dynamics simulation. The structural data are in agreement with kinetic studies on wild-type and mutant FabIs, and reveal that the complex is primarily stabilized by interactions between acidic residues in the ACP helix alpha2 and a patch of basic residues adjacent to the FabI substrate-binding loop. Unexpectedly, the acyl-pantetheine thioester carbonyl is not hydrogen-bonded to Tyr(156), a conserved component of the short chain alcohol dehydrogenase/reductase superfamily active site triad. FabI is a proven target for drug discovery and the present structure provides insight into the molecular determinants that regulate the interaction of ACPs with target proteins.

    Organizational Affiliation: 

    Biochemistry and Structural Biology Graduate Program, Stony Brook University, Stony Brook, NY 11794.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
enoyl-[acyl-carrier-protein] reductase, NADH-dependentA, B262Escherichia coli str. K-12 substr. W3110Mutation(s): 0 
EC: 1.3.1.9
UniProt
Find proteins for P0AEK4 (Escherichia coli (strain K12))
Explore P0AEK4 
Go to UniProtKB:  P0AEK4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AEK4
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Acyl carrier proteinC78Escherichia coliMutation(s): 0 
Gene Names: acpP
UniProt
Find proteins for P0A6A8 (Escherichia coli (strain K12))
Explore P0A6A8 
Go to UniProtKB:  P0A6A8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6A8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.226 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 127.74α = 90
b = 127.74β = 90
c = 206.73γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-17
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance