Malonyl-CoA:ACP Transacylase

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.232 

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This is version 1.4 of the entry. See complete history


Catalysis, Specificity, and ACP Docking Site of Streptomyces coelicolor Malonyl-CoA:ACP Transacylase

Keatinge-Clay, A.T.Shelat, A.A.Savage, D.F.Tsai, S.Miercke, L.J.W.O'Connell III, J.D.Khosla, C.Stroud, R.M.

(2003) Structure 11: 147-154

  • DOI: https://doi.org/10.1016/s0969-2126(03)00004-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Malonyl-CoA:ACP transacylase (MAT), the fabD gene product of Streptomyces coelicolor A3(2), participates in both fatty acid and polyketide synthesis pathways, transferring malonyl groups that are used as extender units in chain growth from malonyl-CoA to pathway-specific acyl carrier proteins (ACPs). Here, the 2.0 A structure reveals an invariant arginine bound to an acetate that mimics the malonyl carboxylate and helps define the extender unit binding site. Catalysis may only occur when the oxyanion hole is formed through substrate binding, preventing hydrolysis of the acyl-enzyme intermediate. Macromolecular docking simulations with actinorhodin ACP suggest that the majority of the ACP docking surface is formed by a helical flap. These results should help to engineer polyketide synthases (PKSs) that produce novel polyketides.

  • Organizational Affiliation

    Graduate Group in Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
malonyl CoA:acyl carrier protein malonyltransferase317Streptomyces coelicolor A3(2)Mutation(s): 0 
Gene Names: fabD
Find proteins for P72391 (Streptomyces coelicolor)
Explore P72391 
Go to UniProtKB:  P72391
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP72391
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.067α = 90
b = 54.486β = 90
c = 109.88γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-21
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2018-09-05
    Changes: Data collection, Structure summary
  • Version 1.4: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description