2B9W

Crystal Structure of CLA-producing fatty acid isomerase from P. acnes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and mechanism of the Propionibacterium acnes polyunsaturated fatty acid isomerase

Liavonchanka, A.Hornung, E.Feussner, I.Rudolph, M.G.

(2006) Proc.Natl.Acad.Sci.Usa 103: 2576-2581

  • DOI: 10.1073/pnas.0510144103
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Conjugated linoleic acids (CLAs) affect body fat gain, carcinogenesis, insulin resistance, and lipid peroxidation in mammals. Several isomers of CLA exist, of which the (9Z, 11E) and (10E, 12Z) isomers have beneficial effects on human metabolism but ...

    Conjugated linoleic acids (CLAs) affect body fat gain, carcinogenesis, insulin resistance, and lipid peroxidation in mammals. Several isomers of CLA exist, of which the (9Z, 11E) and (10E, 12Z) isomers have beneficial effects on human metabolism but are scarce in foods. Bacterial polyunsaturated fatty acid isomerases are promising biotechnological catalysts for CLA production. We describe six crystal structures of the Propionibacterium acnes polyunsaturated fatty acid isomerase PAI in apo- and product-bound forms. The three-domain flavoprotein has previously undescribed folds outside the FAD-binding site. Conformational changes in a hydrophobic channel toward the active site reveal a unique gating mechanism for substrate specificity. The geometry of the substrate-binding site explains the length preferences for C18 fatty acids. A catalytic mechanism for double-bond isomerization is formulated that may be altered to change substrate specificity for syntheses of rare CLAs from easily accessible precursors.


    Organizational Affiliation

    Department of Plant Biochemistry, University of Göttingen, D-37077 Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
putative aminooxidase
A
424Cutibacterium acnes (strain DSM 16379 / KPA171202)Mutation(s): 0 
Find proteins for Q6A8X5 (Cutibacterium acnes (strain DSM 16379 / KPA171202))
Go to UniProtKB:  Q6A8X5
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FAD
Query on FAD

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Download CCD File 
A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
12P
Query on 12P

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Download CCD File 
A
DODECAETHYLENE GLYCOL
POLYETHYLENE GLYCOL PEG400
C24 H50 O13
WRZXKWFJEFFURH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.164 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 160.419α = 90.00
b = 160.419β = 90.00
c = 160.419γ = 90.00
Software Package:
Software NamePurpose
SHELXEmodel building
SCALEPACKdata scaling
SHELXDphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance