2WAS image
Deposition Date 2009-02-15
Release Date 2009-08-25
Last Version Date 2024-05-08
Entry Detail
PDB ID:
2WAS
Keywords:
Title:
Structure of the fungal type I FAS PPT domain
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.90 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.22
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE
Gene (Uniprot):FAS2
Chain IDs:A, D, E
Chain Length:122
Number of Molecules:3
Biological Source:SACCHAROMYCES CEREVISIAE
Polymer Type:polypeptide(L)
Molecule:3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE
Gene (Uniprot):FAS2
Chain IDs:B, C, F
Chain Length:122
Number of Molecules:3
Biological Source:SACCHAROMYCES CEREVISIAE
Primary Citation
Multimeric Options for the Auto-Activation of the Saccharomyces Cerevisiae Fas Type I Megasynthase.
Structure 17 1063 ? (2009)
PMID: 19679086 DOI: 10.1016/J.STR.2009.06.014

Abstact

The fungal type I fatty acid synthase (FAS) is a 2.6 MDa multienzyme complex, catalyzing all necessary steps for the synthesis of long acyl chains. To be catalytically competent, the FAS must be activated by a posttranslational modification of the central acyl carrier domain (ACP) by an intrinsic phosphopantetheine transferase (PPT). However, recent X-ray structures of the fungal FAS revealed a barrel-shaped architecture, with PPT located at the outside of the barrel wall, spatially separated from the ACP caged in the inner volume. This separation indicated that the activation has to proceed before the assembly to the mature complex, in a conformation where the ACP and PPT domains can meet. To gain insight into the auto-activation reaction and also into the fungal FAS assembly pathway, we structurally and functionally characterized the Saccharomyces cerevisiae FAS type I PPT as part of the multienzyme protein and as an isolated domain.

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