Structure of the Human Fatty Acid Synthase KS-MAT Didomain as a Framework for Inhibitor Design.

Experimental Data Snapshot

  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

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Structure of the human fatty acid synthase KS-MAT didomain as a framework for inhibitor design.

Pappenberger, G.Benz, J.Gsell, B.Hennig, M.Ruf, A.Stihle, M.Thoma, R.Rudolph, M.G.

(2010) J Mol Biol 397: 508-519

  • DOI: https://doi.org/10.1016/j.jmb.2010.01.066
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The human fatty acid synthase (FAS) is a key enzyme in the metabolism of fatty acids and a target for antineoplastic and antiobesity drug development. Due to its size and flexibility, structural studies of mammalian FAS have been limited to individual domains or intermediate-resolution studies of the complete porcine FAS. We describe the high-resolution crystal structure of a large part of human FAS that encompasses the tandem domain of beta-ketoacyl synthase (KS) connected by a linker domain to the malonyltransferase (MAT) domain. Hinge regions that allow for substantial flexibility of the subdomains are defined. The KS domain forms the canonical dimer, and its substrate-binding site geometry differs markedly from that of bacterial homologues but is similar to that of the porcine orthologue. The didomain structure reveals a possible way to generate a small and compact KS domain by omitting a large part of the linker and MAT domains, which could greatly aid in rapid screening of KS inhibitors. In the crystal, the MAT domain exhibits two closed conformations that differ significantly by rigid-body plasticity. This flexibility may be important for catalysis and extends the conformational space previously known for type I FAS and 6-deoxyerythronolide B synthase.

  • Organizational Affiliation

    F. Hoffmann La-Roche, Basel, CH-4070 Basel, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fatty acid synthase
A, B, C, D
965Homo sapiensMutation(s): 0 
Gene Names: FASNFAS
UniProt & NIH Common Fund Data Resources
Find proteins for P49327 (Homo sapiens)
Explore P49327 
Go to UniProtKB:  P49327
PHAROS:  P49327
GTEx:  ENSG00000169710 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49327
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.62α = 73.84
b = 91.16β = 86.83
c = 132.11γ = 62.54
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description