6U5V

Electron cryomicroscopy Structure of C. albicans FAS in the Apo state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Electron cryomicroscopy observation of acyl carrier protein translocation in type I fungal fatty acid synthase.

Lou, J.W.Iyer, K.R.Hasan, S.M.N.Cowen, L.E.Mazhab-Jafari, M.T.

(2019) Sci Rep 9: 12987-12987

  • DOI: 10.1038/s41598-019-49261-3
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • During fatty acid biosynthesis, acyl carrier proteins (ACPs) from type I fungal fatty acid synthase (FAS) shuttle substrates and intermediates within a reaction chamber that hosts multiple spatially-fixed catalytic centers. A major challenge in under ...

    During fatty acid biosynthesis, acyl carrier proteins (ACPs) from type I fungal fatty acid synthase (FAS) shuttle substrates and intermediates within a reaction chamber that hosts multiple spatially-fixed catalytic centers. A major challenge in understanding the mechanism of ACP-mediated substrate shuttling is experimental observation of its transient interaction landscape within the reaction chamber. Here, we have shown that ACP spatial distribution is sensitive to the presence of substrates in a catalytically inhibited state, which enables high-resolution investigation of the ACP-dependent conformational transitions within the enoyl reductase (ER) reaction site. In two fungal FASs with distinct ACP localization, the shuttling domain is targeted to the ketoacyl-synthase (KS) domain and away from other catalytic centers, such as acetyl-transferase (AT) and ER domains by steric blockage of the KS active site followed by addition of substrates. These studies strongly suggest that acylation of phosphopantetheine arm of ACP may be an integral part of the substrate shuttling mechanism in type I fungal FAS.


    Organizational Affiliation

    Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Princess Margaret Cancer Research Institute, Toronto, Ontario, Canada.,Department of Medical Biophysics, University of Toronto, Princess Margaret Cancer Research Institute, Toronto, Ontario, Canada. Mohammad.Mazhab-Jafari@uhnresearch.ca.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fatty acid synthase subunit alpha
A
1885Candida albicansMutation(s): 0 
Gene Names: FAS2
EC: 2.3.1.86
Find proteins for P43098 (Candida albicans)
Go to UniProtKB:  P43098
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fatty acid synthase subunit beta
B
2037Candida albicansMutation(s): 0 
Gene Names: FAS1
EC: 2.3.1.86
Find proteins for P34731 (Candida albicans)
Go to UniProtKB:  P34731
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PNS
Query on PNS

Download SDF File 
Download CCD File 
A
4'-PHOSPHOPANTETHEINE
C11 H23 N2 O7 P S
JDMUPRLRUUMCTL-VIFPVBQESA-N
 Ligand Interaction
FMN
Query on FMN

Download SDF File 
Download CCD File 
B
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-10-16
    Type: Initial release