6U5T

Electron cryomicroscopy Structure of S. cerevisiae FAS in the Apo state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



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
  • Structures With Same Primary Citation

  • 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 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
1887Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: FAS2
EC: 2.3.1.86 (PDB Primary Data), 1.1.1.100 (PDB Primary Data), 2.3.1.41 (PDB Primary Data)
Find proteins for A0A140KF01 (Saccharomyces cerevisiae)
Go to UniProtKB:  A0A140KF01

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fatty acid synthase subunit beta
G
2073Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.3.1.86 (PDB Primary Data), 4.2.1.59 (PDB Primary Data), 1.3.1.9 (PDB Primary Data), 2.3.1.38 (PDB Primary Data), 2.3.1.39 (PDB Primary Data), 3.1.2.14 (PDB Primary Data)
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 CCD File 
G
FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
PNS
Query on PNS

Download CCD File 
A
4'-PHOSPHOPANTETHEINE
C11 H23 N2 O7 P S
JDMUPRLRUUMCTL-VIFPVBQESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-10-16
    Type: Initial release
  • Version 2.0: 2019-10-30
    Type: Coordinate replacement
    Reason: Polymer geometry
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary