6J0U

Crystal Structure of the acyltransferase domain from the third module of the ansamitocin polyketide synthase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural and Biochemical Insight into the Recruitment of Acyl Carrier Protein-Linked Extender Units in Ansamitocin Biosynthesis.

Zhang, F.Ji, H.Ali, I.Deng, Z.Bai, L.Zheng, J.

(2020) Chembiochem 21: 1309-1314

  • DOI: https://doi.org/10.1002/cbic.201900628
  • Primary Citation of Related Structures:  
    6J0U, 6L3M, 6L3N

  • PubMed Abstract: 

    A few acyltransferase (AT) domains of modular polyketide synthases (PKSs) recruit acyl carrier protein (ACP)-linked extender units with unusual C2 substituents to confer functionalities that are not available in coenzyme A (CoA)-linked ones. In this study, an AT specific for methoxymalonyl (MOM)-ACP in the third module of the ansamitocin PKS was structurally and biochemically characterized. The AT uses a conserved tryptophan residue at the entrance of the substrate binding tunnel to discriminate between different carriers. A W275R mutation switches its carrier specificity from the ACP to the CoA molecule. The acyl-AT complex structures clearly show that the MOM-ACP accepted by the AT has the 2S instead of the opposite 2R stereochemistry that is predicted according to the biosynthetic derivation from a d-glycolytic intermediate. Together, these results reveal the structural basis of ATs recognizing ACP-linked extender units in polyketide biosynthesis.


  • Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, 200240, Shanghai, P. R. China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Type 1 modular polyketide synthase
A, B, C, D
469Actinosynnema pretiosum subsp. auranticumMutation(s): 0 
Gene Names: AsmAT3
UniProt
Find proteins for A0A1U9Y7T8 (Actinosynnema pretiosum subsp. pretiosum)
Explore A0A1U9Y7T8 
Go to UniProtKB:  A0A1U9Y7T8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1U9Y7T8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 214.728α = 90
b = 100.303β = 113.07
c = 103.409γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (China)China31570056,31770068

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-18
    Type: Initial release
  • Version 1.1: 2020-04-29
    Changes: Database references
  • Version 1.2: 2020-05-20
    Changes: Database references
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Refinement description