2FHS

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


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

  • 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 inf ...

    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

    Department of Chemistry, Stony Brook University, Stony Brook, NY 11794.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
enoyl-[acyl-carrier-protein] reductase, NADH-dependent
A, B
262Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fabI (envM)
EC: 1.3.1.9
Find proteins for P0AEK4 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEK4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Acyl carrier protein
C
78Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: acpP
Find proteins for P0A6A8 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6A8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.224 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 127.740α = 90.00
b = 127.740β = 90.00
c = 206.730γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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