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 
  • R-Value Observed: 0.165 

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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 U S A 103: 2576-2581

  • DOI: 10.1073/pnas.0510144103
  • Primary Citation of Related Structures:  
    2B9W, 2B9X, 2B9Y, 2BA9, 2BAB, 2BAC

  • 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 are scarce in foods ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
putative aminooxidaseA424Cutibacterium acnesMutation(s): 0 
UniProt
Find proteins for Q6A8X5 (Cutibacterium acnes (strain DSM 16379 / KPA171202))
Explore Q6A8X5 
Go to UniProtKB:  Q6A8X5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6A8X5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
E [auth A]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
12P
Query on 12P

Download Ideal Coordinates CCD File 
F [auth A]DODECAETHYLENE GLYCOL
C24 H50 O13
WRZXKWFJEFFURH-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
D [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
SODIUM ION
Na
FKNQFGJONOIPTF-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 
  • R-Value Observed: 0.165 
  • Space Group: I 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.419α = 90
b = 160.419β = 90
c = 160.419γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SHELXDphasing
SHELXEmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

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