4EWP

Crystal structure of FabH from Micrococcus luteus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.198 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of FabH and factors affecting the distribution of branched fatty acids in Micrococcus luteus.

Pereira, J.H.Goh, E.B.Keasling, J.D.Beller, H.R.Adams, P.D.

(2012) Acta Crystallogr.,Sect.D 68: 1320-1328

  • DOI: 10.1107/S0907444912028351

  • PubMed Abstract: 
  • Micrococcus luteus is a Gram-positive bacterium that produces iso- and anteiso-branched alkenes by the head-to-head condensation of fatty-acid thioesters [coenzyme A (CoA) or acyl carrier protein (ACP)]; this activity is of interest for the productio ...

    Micrococcus luteus is a Gram-positive bacterium that produces iso- and anteiso-branched alkenes by the head-to-head condensation of fatty-acid thioesters [coenzyme A (CoA) or acyl carrier protein (ACP)]; this activity is of interest for the production of advanced biofuels. In an effort to better understand the control of the formation of branched fatty acids in M. luteus, the structure of FabH (MlFabH) was determined. FabH, or β-ketoacyl-ACP synthase III, catalyzes the initial step of fatty-acid biosynthesis: the condensation of malonyl-ACP with an acyl-CoA. Analysis of the MlFabH structure provides insights into its substrate selectivity with regard to length and branching of the acyl-CoA. The most structurally divergent region of FabH is the L9 loop region located at the dimer interface, which is involved in the formation of the acyl-binding channel and thus limits the substrate-channel size. The residue Phe336, which is positioned near the catalytic triad, appears to play a major role in branched-substrate selectivity. In addition to structural studies of MlFabH, transcriptional studies of M. luteus were also performed, focusing on the increase in the ratio of anteiso:iso-branched alkenes that was observed during the transition from early to late stationary phase. Gene-expression microarray analysis identified two genes involved in leucine and isoleucine metabolism that may explain this transition.


    Organizational Affiliation

    Joint BioEnergy Institute, Emeryville, CA 94608, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
3-oxoacyl-[acyl-carrier-protein] synthase 3
A, B, C, D, E, F
350Micrococcus luteus (strain ATCC 4698 / DSM 20030 / JCM 1464 / NBRC 3333 / NCIMB 9278 / NCTC 2665 / VKM Ac-2230)Mutation(s): 0 
Gene Names: fabH
EC: 2.3.1.180
Find proteins for C5CAR9 (Micrococcus luteus (strain ATCC 4698 / DSM 20030 / JCM 1464 / NBRC 3333 / NCIMB 9278 / NCTC 2665 / VKM Ac-2230))
Go to UniProtKB:  C5CAR9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.198 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.169 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 80.140α = 69.82
b = 85.026β = 71.37
c = 96.916γ = 85.66
Software Package:
Software NamePurpose
BOSdata collection
PHENIXmodel building
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-03
    Type: Initial release