6U5V

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 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:  
    6U5T, 6U5U, 6U5V, 6U5W

  • 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 understanding the mechanism of ACP-mediated substrate shuttling is experimental observation of its transient interaction landscape within the reaction chamber ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fatty acid synthase subunit alphaA1,885Candida albicansMutation(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)
UniProt
Find proteins for P43098 (Candida albicans)
Explore P43098 
Go to UniProtKB:  P43098
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP43098
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fatty acid synthase subunit betaB2,037Candida albicansMutation(s): 0 
Gene Names: FAS1
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)
UniProt
Find proteins for P34731 (Candida albicans)
Explore P34731 
Go to UniProtKB:  P34731
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP34731
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN (Subject of Investigation/LOI)
Query on FMN

Download Ideal Coordinates CCD File 
D [auth B]FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
PNS
Query on PNS

Download Ideal Coordinates CCD File 
C [auth A]4'-PHOSPHOPANTETHEINE
C11 H23 N2 O7 P S
JDMUPRLRUUMCTL-VIFPVBQESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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