2VCY

Crystal Structure of 2-Enoyl Thioester Reductase of Human FAS II


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Enzymological Studies of 2-Enoyl Thioester Reductase of the Human Mitochondrial Fas II Pathway: New Insights Into its Substrate Recognition Properties.

Chen, Z.J.Pudas, R.Sharma, S.Smart, O.S.Juffer, A.H.Hiltunen, J.K.Wierenga, R.K.Haapalainen, A.M.

(2008) J.Mol.Biol. 379: 830

  • DOI: 10.1016/j.jmb.2008.04.041

  • PubMed Abstract: 
  • Structural and kinetic properties of the human 2-enoyl thioester reductase [mitochondrial enoyl-coenzyme A reductase (MECR)/ETR1] of the mitochondrial fatty acid synthesis (FAS) II pathway have been determined. The crystal structure of this dimeric e ...

    Structural and kinetic properties of the human 2-enoyl thioester reductase [mitochondrial enoyl-coenzyme A reductase (MECR)/ETR1] of the mitochondrial fatty acid synthesis (FAS) II pathway have been determined. The crystal structure of this dimeric enzyme (at 2.4 A resolution) suggests that the binding site for the recognition helix of the acyl carrier protein is in a groove between the two adjacent monomers. This groove is connected via the pantetheine binding cleft to the active site. The modeled mode of NADPH binding, using molecular dynamics calculations, suggests that Tyr94 and Trp311 are critical for catalysis, which is supported by enzyme kinetic data. A deep, water-filled pocket, shaped by hydrophobic and polar residues and extending away from the catalytic site, was recognized. This pocket can accommodate a fatty acyl tail of up to 16 carbons. Mutagenesis of the residues near the end of this pocket confirms the importance of this region for the binding of substrate molecules with long fatty acyl tails. Furthermore, the kinetic analysis of the wild-type MECR/ETR1 shows a bimodal distribution of catalytic efficiencies, in agreement with the notion that two major products are generated by the mitochondrial FAS II pathway.


    Organizational Affiliation

    Biocenter Oulu and Department of Biochemistry, University of Oulu, P.O. Box 3000, FI-90014, Oulu, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANS-2-ENOYL-COA REDUCTASE
A, B
344Homo sapiensMutation(s): 0 
Gene Names: MECR (NBRF1)
EC: 1.3.1.104
Find proteins for Q9BV79 (Homo sapiens)
Go to Gene View: MECR
Go to UniProtKB:  Q9BV79
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.207 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.620α = 90.00
b = 104.620β = 90.00
c = 146.560γ = 90.00
Software Package:
Software NamePurpose
BUSTER-TNTrefinement
SCALAdata scaling
iMOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance