2VKZ

Structure of the cerulenin-inhibited fungal fatty acid synthase type I multienzyme complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Inhibition of the Fungal Fatty Acid Synthase Type I Multienzyme Complex.

Johansson, P.Wiltschi, B.Kumari, P.Kessler, B.Vonrhein, C.Vonck, J.Oesterhelt, D.Grininger, M.

(2008) Proc.Natl.Acad.Sci.USA 105: 12803

  • DOI: 10.1073/pnas.0805827105

  • PubMed Abstract: 
  • Fatty acids are among the major building blocks of living cells, making lipid biosynthesis a potent target for compounds with antibiotic or antineoplastic properties. We present the crystal structure of the 2.6-MDa Saccharomyces cerevisiae fatty acid ...

    Fatty acids are among the major building blocks of living cells, making lipid biosynthesis a potent target for compounds with antibiotic or antineoplastic properties. We present the crystal structure of the 2.6-MDa Saccharomyces cerevisiae fatty acid synthase (FAS) multienzyme in complex with the antibiotic cerulenin, representing, to our knowledge, the first structure of an inhibited fatty acid megasynthase. Cerulenin attacks the FAS ketoacyl synthase (KS) domain, forming a covalent bond to the active site cysteine C1305. The inhibitor binding causes two significant conformational changes of the enzyme. First, phenylalanine F1646, shielding the active site, flips and allows access to the nucleophilic cysteine. Second, methionine M1251, placed in the center of the acyl-binding tunnel, rotates and unlocks the inner part of the fatty acid binding cavity. The importance of the rotational movement of the gatekeeping M1251 side chain is reflected by the cerulenin resistance and the changed product spectrum reported for S. cerevisiae strains mutated in the adjacent glycine G1250. Platensimycin and thiolactomycin are two other potent inhibitors of KSs. However, in contrast to cerulenin, they show selectivity toward the prokaryotic FAS system. Because the flipped F1646 characterizes the catalytic state accessible for platensimycin and thiolactomycin binding, we superimposed structures of inhibited bacterial enzymes onto the S. cerevisiae FAS model. Although almost all side chains involved in inhibitor binding are conserved in the FAS multienzyme, a different conformation of the loop K1413-K1423 of the KS domain might explain the observed low antifungal properties of platensimycin and thiolactomycin.


    Organizational Affiliation

    Department of Membrane Biochemistry, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FATTY ACID SYNTHASE SUBUNIT ALPHA
A, B, C
1887Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: FAS2
EC: 2.3.1.86
Find proteins for P19097 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P19097
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FATTY ACID SYNTHASE SUBUNIT BETA
G, H, I
2051Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: FAS1
EC: 2.3.1.86
Find proteins for P07149 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P07149
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download SDF File 
Download CCD File 
G, H, I
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
CER
Query on CER

Download SDF File 
Download CCD File 
A, B, C
(2S, 3R)-3-HYDROXY-4-OXO-7,10-TRANS,TRANS-DODECADIENAMIDE
CERULENIN
C12 H19 N O3
QEPYZBPOTYDXNA-FECJWDPASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.268 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 231.900α = 90.00
b = 231.900β = 90.00
c = 756.800γ = 90.00
Software Package:
Software NamePurpose
SOLOMONphasing
SHELXphasing
piratephasing
SCALAdata scaling
MOSFLMdata reduction
DMphasing
SHARPphasing
piratemodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-08-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-06-21
    Type: Refinement description